Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Borislav Petkov | 73860c6 | 2010-03-31 21:56:42 +0200 | [diff] [blame] | 2 | * (c) 2003-2010 Advanced Micro Devices, Inc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Your use of this code is subject to the terms and conditions of the |
| 4 | * GNU general public license version 2. See "COPYING" or |
| 5 | * http://www.gnu.org/licenses/gpl.html |
| 6 | * |
Dave Jones | 065b807 | 2005-05-31 19:03:46 -0700 | [diff] [blame] | 7 | * Support : mark.langsdorf@amd.com |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
| 9 | * Based on the powernow-k7.c module written by Dave Jones. |
Dave Jones | f4432c5 | 2008-10-20 13:31:45 -0400 | [diff] [blame] | 10 | * (C) 2003 Dave Jones on behalf of SuSE Labs |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * (C) 2004 Dominik Brodowski <linux@brodo.de> |
Pavel Machek | a253129 | 2010-07-18 14:27:13 +0200 | [diff] [blame] | 12 | * (C) 2004 Pavel Machek <pavel@ucw.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * Licensed under the terms of the GNU GPL License version 2. |
| 14 | * Based upon datasheets & sample CPUs kindly provided by AMD. |
| 15 | * |
| 16 | * Valuable input gratefully received from Dave Jones, Pavel Machek, |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 17 | * Dominik Brodowski, Jacob Shin, and others. |
Dave Jones | 065b807 | 2005-05-31 19:03:46 -0700 | [diff] [blame] | 18 | * Originally developed by Paul Devriendt. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | * Processor information obtained from Chapter 9 (Power and Thermal Management) |
| 20 | * of the "BIOS and Kernel Developer's Guide for the AMD Athlon 64 and AMD |
| 21 | * Opteron Processors" available for download from www.amd.com |
| 22 | * |
Dave Jones | 2e3f8fa | 2006-05-30 17:25:14 -0400 | [diff] [blame] | 23 | * Tables for specific CPUs can be inferred from |
Dave Jones | 065b807 | 2005-05-31 19:03:46 -0700 | [diff] [blame] | 24 | * http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/30430.pdf |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | */ |
| 26 | |
| 27 | #include <linux/kernel.h> |
| 28 | #include <linux/smp.h> |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/cpufreq.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/string.h> |
Dave Jones | 065b807 | 2005-05-31 19:03:46 -0700 | [diff] [blame] | 34 | #include <linux/cpumask.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 35 | #include <linux/sched.h> /* for current / set_cpus_allowed() */ |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 36 | #include <linux/io.h> |
| 37 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 39 | #include <asm/msr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/acpi.h> |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 42 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <acpi/processor.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | #define PFX "powernow-k8: " |
Mark Langsdorf | c5829cd | 2007-10-17 16:52:08 -0500 | [diff] [blame] | 46 | #define VERSION "version 2.20.00" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include "powernow-k8.h" |
Mark Langsdorf | a2fed57 | 2010-03-18 18:41:46 +0100 | [diff] [blame] | 48 | #include "mperf.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
| 50 | /* serialize freq changes */ |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 51 | static DEFINE_MUTEX(fidvid_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
travis@sgi.com | 2c6b8c0 | 2008-01-30 13:33:11 +0100 | [diff] [blame] | 53 | static DEFINE_PER_CPU(struct powernow_k8_data *, powernow_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 55 | static int cpu_family = CPU_OPTERON; |
| 56 | |
Borislav Petkov | 73860c6 | 2010-03-31 21:56:42 +0200 | [diff] [blame] | 57 | /* core performance boost */ |
| 58 | static bool cpb_capable, cpb_enabled; |
| 59 | static struct msr __percpu *msrs; |
| 60 | |
Mark Langsdorf | a2fed57 | 2010-03-18 18:41:46 +0100 | [diff] [blame] | 61 | static struct cpufreq_driver cpufreq_amd64_driver; |
| 62 | |
Dave Jones | 065b807 | 2005-05-31 19:03:46 -0700 | [diff] [blame] | 63 | #ifndef CONFIG_SMP |
Rusty Russell | 7ad728f | 2009-03-13 14:49:50 +1030 | [diff] [blame] | 64 | static inline const struct cpumask *cpu_core_mask(int cpu) |
| 65 | { |
| 66 | return cpumask_of(0); |
| 67 | } |
Dave Jones | 065b807 | 2005-05-31 19:03:46 -0700 | [diff] [blame] | 68 | #endif |
| 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | /* Return a frequency in MHz, given an input fid */ |
| 71 | static u32 find_freq_from_fid(u32 fid) |
| 72 | { |
| 73 | return 800 + (fid * 100); |
| 74 | } |
| 75 | |
| 76 | /* Return a frequency in KHz, given an input fid */ |
| 77 | static u32 find_khz_freq_from_fid(u32 fid) |
| 78 | { |
| 79 | return 1000 * find_freq_from_fid(fid); |
| 80 | } |
| 81 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 82 | static u32 find_khz_freq_from_pstate(struct cpufreq_frequency_table *data, |
| 83 | u32 pstate) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | { |
Mark Langsdorf | c5829cd | 2007-10-17 16:52:08 -0500 | [diff] [blame] | 85 | return data[pstate].frequency; |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 86 | } |
| 87 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | /* Return the vco fid for an input fid |
| 89 | * |
| 90 | * Each "low" fid has corresponding "high" fid, and you can get to "low" fids |
| 91 | * only from corresponding high fids. This returns "high" fid corresponding to |
| 92 | * "low" one. |
| 93 | */ |
| 94 | static u32 convert_fid_to_vco_fid(u32 fid) |
| 95 | { |
Dave Jones | 32ee8c3 | 2006-02-28 00:43:23 -0500 | [diff] [blame] | 96 | if (fid < HI_FID_TABLE_BOTTOM) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | return 8 + (2 * fid); |
Dave Jones | 32ee8c3 | 2006-02-28 00:43:23 -0500 | [diff] [blame] | 98 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | return fid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | /* |
| 103 | * Return 1 if the pending bit is set. Unless we just instructed the processor |
| 104 | * to transition to a new state, seeing this bit set is really bad news. |
| 105 | */ |
| 106 | static int pending_bit_stuck(void) |
| 107 | { |
| 108 | u32 lo, hi; |
| 109 | |
Langsdorf, Mark | e7bdd7a | 2006-06-08 10:30:17 -0500 | [diff] [blame] | 110 | if (cpu_family == CPU_HW_PSTATE) |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 111 | return 0; |
| 112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | rdmsr(MSR_FIDVID_STATUS, lo, hi); |
| 114 | return lo & MSR_S_LO_CHANGE_PENDING ? 1 : 0; |
| 115 | } |
| 116 | |
| 117 | /* |
| 118 | * Update the global current fid / vid values from the status msr. |
| 119 | * Returns 1 on error. |
| 120 | */ |
| 121 | static int query_current_values_with_pending_wait(struct powernow_k8_data *data) |
| 122 | { |
| 123 | u32 lo, hi; |
| 124 | u32 i = 0; |
| 125 | |
Langsdorf, Mark | e7bdd7a | 2006-06-08 10:30:17 -0500 | [diff] [blame] | 126 | if (cpu_family == CPU_HW_PSTATE) { |
Naga Chumbalkar | 532cfee | 2009-06-11 15:26:48 +0000 | [diff] [blame] | 127 | rdmsr(MSR_PSTATE_STATUS, lo, hi); |
| 128 | i = lo & HW_PSTATE_MASK; |
| 129 | data->currpstate = i; |
Andreas Herrmann | a266d9f | 2008-11-21 14:49:25 +0100 | [diff] [blame] | 130 | |
Naga Chumbalkar | 532cfee | 2009-06-11 15:26:48 +0000 | [diff] [blame] | 131 | /* |
| 132 | * a workaround for family 11h erratum 311 might cause |
| 133 | * an "out-of-range Pstate if the core is in Pstate-0 |
| 134 | */ |
| 135 | if ((boot_cpu_data.x86 == 0x11) && (i >= data->numps)) |
| 136 | data->currpstate = HW_PSTATE_0; |
| 137 | |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 138 | return 0; |
| 139 | } |
Dave Jones | 7153d96 | 2005-07-28 09:45:10 -0700 | [diff] [blame] | 140 | do { |
Dave Jones | 0213df7 | 2005-10-21 17:21:03 -0400 | [diff] [blame] | 141 | if (i++ > 10000) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 142 | pr_debug("detected change pending stuck\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | return 1; |
| 144 | } |
| 145 | rdmsr(MSR_FIDVID_STATUS, lo, hi); |
Dave Jones | 7153d96 | 2005-07-28 09:45:10 -0700 | [diff] [blame] | 146 | } while (lo & MSR_S_LO_CHANGE_PENDING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | data->currvid = hi & MSR_S_HI_CURRENT_VID; |
| 149 | data->currfid = lo & MSR_S_LO_CURRENT_FID; |
| 150 | |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | /* the isochronous relief time */ |
| 155 | static void count_off_irt(struct powernow_k8_data *data) |
| 156 | { |
| 157 | udelay((1 << data->irt) * 10); |
| 158 | return; |
| 159 | } |
| 160 | |
Simon Arlott | 27b46d7 | 2007-10-20 01:13:56 +0200 | [diff] [blame] | 161 | /* the voltage stabilization time */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | static void count_off_vst(struct powernow_k8_data *data) |
| 163 | { |
| 164 | udelay(data->vstable * VST_UNITS_20US); |
| 165 | return; |
| 166 | } |
| 167 | |
| 168 | /* need to init the control msr to a safe value (for each cpu) */ |
| 169 | static void fidvid_msr_init(void) |
| 170 | { |
| 171 | u32 lo, hi; |
| 172 | u8 fid, vid; |
| 173 | |
| 174 | rdmsr(MSR_FIDVID_STATUS, lo, hi); |
| 175 | vid = hi & MSR_S_HI_CURRENT_VID; |
| 176 | fid = lo & MSR_S_LO_CURRENT_FID; |
| 177 | lo = fid | (vid << MSR_C_LO_VID_SHIFT); |
| 178 | hi = MSR_C_HI_STP_GNT_BENIGN; |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 179 | pr_debug("cpu%d, init lo 0x%x, hi 0x%x\n", smp_processor_id(), lo, hi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | wrmsr(MSR_FIDVID_CTL, lo, hi); |
| 181 | } |
| 182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | /* write the new fid value along with the other control fields to the msr */ |
| 184 | static int write_new_fid(struct powernow_k8_data *data, u32 fid) |
| 185 | { |
| 186 | u32 lo; |
| 187 | u32 savevid = data->currvid; |
Dave Jones | 0213df7 | 2005-10-21 17:21:03 -0400 | [diff] [blame] | 188 | u32 i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | |
| 190 | if ((fid & INVALID_FID_MASK) || (data->currvid & INVALID_VID_MASK)) { |
| 191 | printk(KERN_ERR PFX "internal error - overflow on fid write\n"); |
| 192 | return 1; |
| 193 | } |
| 194 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 195 | lo = fid; |
| 196 | lo |= (data->currvid << MSR_C_LO_VID_SHIFT); |
| 197 | lo |= MSR_C_LO_INIT_FID_VID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 199 | pr_debug("writing fid 0x%x, lo 0x%x, hi 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | fid, lo, data->plllock * PLL_LOCK_CONVERSION); |
| 201 | |
Dave Jones | 0213df7 | 2005-10-21 17:21:03 -0400 | [diff] [blame] | 202 | do { |
| 203 | wrmsr(MSR_FIDVID_CTL, lo, data->plllock * PLL_LOCK_CONVERSION); |
| 204 | if (i++ > 100) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 205 | printk(KERN_ERR PFX |
| 206 | "Hardware error - pending bit very stuck - " |
| 207 | "no further pstate changes possible\n"); |
Chris Wright | 63172cb | 2005-10-21 16:56:08 -0700 | [diff] [blame] | 208 | return 1; |
Dave Jones | 32ee8c3 | 2006-02-28 00:43:23 -0500 | [diff] [blame] | 209 | } |
Dave Jones | 0213df7 | 2005-10-21 17:21:03 -0400 | [diff] [blame] | 210 | } while (query_current_values_with_pending_wait(data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
| 212 | count_off_irt(data); |
| 213 | |
| 214 | if (savevid != data->currvid) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 215 | printk(KERN_ERR PFX |
| 216 | "vid change on fid trans, old 0x%x, new 0x%x\n", |
| 217 | savevid, data->currvid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | return 1; |
| 219 | } |
| 220 | |
| 221 | if (fid != data->currfid) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 222 | printk(KERN_ERR PFX |
| 223 | "fid trans failed, fid 0x%x, curr 0x%x\n", fid, |
| 224 | data->currfid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | return 1; |
| 226 | } |
| 227 | |
| 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | /* Write a new vid to the hardware */ |
| 232 | static int write_new_vid(struct powernow_k8_data *data, u32 vid) |
| 233 | { |
| 234 | u32 lo; |
| 235 | u32 savefid = data->currfid; |
Dave Jones | 0213df7 | 2005-10-21 17:21:03 -0400 | [diff] [blame] | 236 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | |
| 238 | if ((data->currfid & INVALID_FID_MASK) || (vid & INVALID_VID_MASK)) { |
| 239 | printk(KERN_ERR PFX "internal error - overflow on vid write\n"); |
| 240 | return 1; |
| 241 | } |
| 242 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 243 | lo = data->currfid; |
| 244 | lo |= (vid << MSR_C_LO_VID_SHIFT); |
| 245 | lo |= MSR_C_LO_INIT_FID_VID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 247 | pr_debug("writing vid 0x%x, lo 0x%x, hi 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | vid, lo, STOP_GRANT_5NS); |
| 249 | |
Dave Jones | 0213df7 | 2005-10-21 17:21:03 -0400 | [diff] [blame] | 250 | do { |
| 251 | wrmsr(MSR_FIDVID_CTL, lo, STOP_GRANT_5NS); |
Dave Jones | 6df8900 | 2005-11-30 13:33:30 -0800 | [diff] [blame] | 252 | if (i++ > 100) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 253 | printk(KERN_ERR PFX "internal error - pending bit " |
| 254 | "very stuck - no further pstate " |
| 255 | "changes possible\n"); |
Dave Jones | 6df8900 | 2005-11-30 13:33:30 -0800 | [diff] [blame] | 256 | return 1; |
| 257 | } |
Dave Jones | 0213df7 | 2005-10-21 17:21:03 -0400 | [diff] [blame] | 258 | } while (query_current_values_with_pending_wait(data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
| 260 | if (savefid != data->currfid) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 261 | printk(KERN_ERR PFX "fid changed on vid trans, old " |
| 262 | "0x%x new 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | savefid, data->currfid); |
| 264 | return 1; |
| 265 | } |
| 266 | |
| 267 | if (vid != data->currvid) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 268 | printk(KERN_ERR PFX "vid trans failed, vid 0x%x, " |
| 269 | "curr 0x%x\n", |
| 270 | vid, data->currvid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | return 1; |
| 272 | } |
| 273 | |
| 274 | return 0; |
| 275 | } |
| 276 | |
| 277 | /* |
| 278 | * Reduce the vid by the max of step or reqvid. |
| 279 | * Decreasing vid codes represent increasing voltages: |
Dave Jones | 841e40b | 2005-07-28 09:40:04 -0700 | [diff] [blame] | 280 | * vid of 0 is 1.550V, vid of 0x1e is 0.800V, vid of VID_OFF is off. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | */ |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 282 | static int decrease_vid_code_by_step(struct powernow_k8_data *data, |
| 283 | u32 reqvid, u32 step) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | { |
| 285 | if ((data->currvid - reqvid) > step) |
| 286 | reqvid = data->currvid - step; |
| 287 | |
| 288 | if (write_new_vid(data, reqvid)) |
| 289 | return 1; |
| 290 | |
| 291 | count_off_vst(data); |
| 292 | |
| 293 | return 0; |
| 294 | } |
| 295 | |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 296 | /* Change hardware pstate by single MSR write */ |
| 297 | static int transition_pstate(struct powernow_k8_data *data, u32 pstate) |
| 298 | { |
| 299 | wrmsr(MSR_PSTATE_CTRL, pstate, 0); |
Mark Langsdorf | c5829cd | 2007-10-17 16:52:08 -0500 | [diff] [blame] | 300 | data->currpstate = pstate; |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 301 | return 0; |
| 302 | } |
| 303 | |
| 304 | /* Change Opteron/Athlon64 fid and vid, by the 3 phases. */ |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 305 | static int transition_fid_vid(struct powernow_k8_data *data, |
| 306 | u32 reqfid, u32 reqvid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | { |
Mark Langsdorf | a2e1b4c | 2009-07-26 10:55:25 -0500 | [diff] [blame] | 308 | if (core_voltage_pre_transition(data, reqvid, reqfid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | return 1; |
| 310 | |
| 311 | if (core_frequency_transition(data, reqfid)) |
| 312 | return 1; |
| 313 | |
| 314 | if (core_voltage_post_transition(data, reqvid)) |
| 315 | return 1; |
| 316 | |
| 317 | if (query_current_values_with_pending_wait(data)) |
| 318 | return 1; |
| 319 | |
| 320 | if ((reqfid != data->currfid) || (reqvid != data->currvid)) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 321 | printk(KERN_ERR PFX "failed (cpu%d): req 0x%x 0x%x, " |
| 322 | "curr 0x%x 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | smp_processor_id(), |
| 324 | reqfid, reqvid, data->currfid, data->currvid); |
| 325 | return 1; |
| 326 | } |
| 327 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 328 | pr_debug("transitioned (cpu%d): new fid 0x%x, vid 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | smp_processor_id(), data->currfid, data->currvid); |
| 330 | |
| 331 | return 0; |
| 332 | } |
| 333 | |
| 334 | /* Phase 1 - core voltage transition ... setup voltage */ |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 335 | static int core_voltage_pre_transition(struct powernow_k8_data *data, |
Mark Langsdorf | a2e1b4c | 2009-07-26 10:55:25 -0500 | [diff] [blame] | 336 | u32 reqvid, u32 reqfid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | { |
| 338 | u32 rvosteps = data->rvo; |
| 339 | u32 savefid = data->currfid; |
Mark Langsdorf | a2e1b4c | 2009-07-26 10:55:25 -0500 | [diff] [blame] | 340 | u32 maxvid, lo, rvomult = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 342 | pr_debug("ph1 (cpu%d): start, currfid 0x%x, currvid 0x%x, " |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 343 | "reqvid 0x%x, rvo 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | smp_processor_id(), |
| 345 | data->currfid, data->currvid, reqvid, data->rvo); |
| 346 | |
Mark Langsdorf | a2e1b4c | 2009-07-26 10:55:25 -0500 | [diff] [blame] | 347 | if ((savefid < LO_FID_TABLE_TOP) && (reqfid < LO_FID_TABLE_TOP)) |
| 348 | rvomult = 2; |
| 349 | rvosteps *= rvomult; |
Dave Jones | 065b807 | 2005-05-31 19:03:46 -0700 | [diff] [blame] | 350 | rdmsr(MSR_FIDVID_STATUS, lo, maxvid); |
| 351 | maxvid = 0x1f & (maxvid >> 16); |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 352 | pr_debug("ph1 maxvid=0x%x\n", maxvid); |
Dave Jones | 065b807 | 2005-05-31 19:03:46 -0700 | [diff] [blame] | 353 | if (reqvid < maxvid) /* lower numbers are higher voltages */ |
| 354 | reqvid = maxvid; |
| 355 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | while (data->currvid > reqvid) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 357 | pr_debug("ph1: curr 0x%x, req vid 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | data->currvid, reqvid); |
| 359 | if (decrease_vid_code_by_step(data, reqvid, data->vidmvs)) |
| 360 | return 1; |
| 361 | } |
| 362 | |
Mark Langsdorf | a2e1b4c | 2009-07-26 10:55:25 -0500 | [diff] [blame] | 363 | while ((rvosteps > 0) && |
| 364 | ((rvomult * data->rvo + data->currvid) > reqvid)) { |
Dave Jones | 065b807 | 2005-05-31 19:03:46 -0700 | [diff] [blame] | 365 | if (data->currvid == maxvid) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | rvosteps = 0; |
| 367 | } else { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 368 | pr_debug("ph1: changing vid for rvo, req 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | data->currvid - 1); |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 370 | if (decrease_vid_code_by_step(data, data->currvid-1, 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | return 1; |
| 372 | rvosteps--; |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | if (query_current_values_with_pending_wait(data)) |
| 377 | return 1; |
| 378 | |
| 379 | if (savefid != data->currfid) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 380 | printk(KERN_ERR PFX "ph1 err, currfid changed 0x%x\n", |
| 381 | data->currfid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | return 1; |
| 383 | } |
| 384 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 385 | pr_debug("ph1 complete, currfid 0x%x, currvid 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | data->currfid, data->currvid); |
| 387 | |
| 388 | return 0; |
| 389 | } |
| 390 | |
| 391 | /* Phase 2 - core frequency transition */ |
| 392 | static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid) |
| 393 | { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 394 | u32 vcoreqfid, vcocurrfid, vcofiddiff; |
| 395 | u32 fid_interval, savevid = data->currvid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | if (data->currfid == reqfid) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 398 | printk(KERN_ERR PFX "ph2 null fid transition 0x%x\n", |
| 399 | data->currfid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | return 0; |
| 401 | } |
| 402 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 403 | pr_debug("ph2 (cpu%d): starting, currfid 0x%x, currvid 0x%x, " |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 404 | "reqfid 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | smp_processor_id(), |
| 406 | data->currfid, data->currvid, reqfid); |
| 407 | |
| 408 | vcoreqfid = convert_fid_to_vco_fid(reqfid); |
| 409 | vcocurrfid = convert_fid_to_vco_fid(data->currfid); |
| 410 | vcofiddiff = vcocurrfid > vcoreqfid ? vcocurrfid - vcoreqfid |
| 411 | : vcoreqfid - vcocurrfid; |
| 412 | |
Mark Langsdorf | a2e1b4c | 2009-07-26 10:55:25 -0500 | [diff] [blame] | 413 | if ((reqfid <= LO_FID_TABLE_TOP) && (data->currfid <= LO_FID_TABLE_TOP)) |
| 414 | vcofiddiff = 0; |
| 415 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | while (vcofiddiff > 2) { |
Langsdorf, Mark | 019a61b | 2005-11-29 14:18:03 -0600 | [diff] [blame] | 417 | (data->currfid & 1) ? (fid_interval = 1) : (fid_interval = 2); |
| 418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | if (reqfid > data->currfid) { |
| 420 | if (data->currfid > LO_FID_TABLE_TOP) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 421 | if (write_new_fid(data, |
| 422 | data->currfid + fid_interval)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | } else { |
| 425 | if (write_new_fid |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 426 | (data, |
| 427 | 2 + convert_fid_to_vco_fid(data->currfid))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | } |
| 430 | } else { |
Langsdorf, Mark | 019a61b | 2005-11-29 14:18:03 -0600 | [diff] [blame] | 431 | if (write_new_fid(data, data->currfid - fid_interval)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | return 1; |
| 433 | } |
| 434 | |
| 435 | vcocurrfid = convert_fid_to_vco_fid(data->currfid); |
| 436 | vcofiddiff = vcocurrfid > vcoreqfid ? vcocurrfid - vcoreqfid |
| 437 | : vcoreqfid - vcocurrfid; |
| 438 | } |
| 439 | |
| 440 | if (write_new_fid(data, reqfid)) |
| 441 | return 1; |
| 442 | |
| 443 | if (query_current_values_with_pending_wait(data)) |
| 444 | return 1; |
| 445 | |
| 446 | if (data->currfid != reqfid) { |
| 447 | printk(KERN_ERR PFX |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 448 | "ph2: mismatch, failed fid transition, " |
| 449 | "curr 0x%x, req 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | data->currfid, reqfid); |
| 451 | return 1; |
| 452 | } |
| 453 | |
| 454 | if (savevid != data->currvid) { |
| 455 | printk(KERN_ERR PFX "ph2: vid changed, save 0x%x, curr 0x%x\n", |
| 456 | savevid, data->currvid); |
| 457 | return 1; |
| 458 | } |
| 459 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 460 | pr_debug("ph2 complete, currfid 0x%x, currvid 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | data->currfid, data->currvid); |
| 462 | |
| 463 | return 0; |
| 464 | } |
| 465 | |
| 466 | /* Phase 3 - core voltage transition flow ... jump to the final vid. */ |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 467 | static int core_voltage_post_transition(struct powernow_k8_data *data, |
| 468 | u32 reqvid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | { |
| 470 | u32 savefid = data->currfid; |
| 471 | u32 savereqvid = reqvid; |
| 472 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 473 | pr_debug("ph3 (cpu%d): starting, currfid 0x%x, currvid 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | smp_processor_id(), |
| 475 | data->currfid, data->currvid); |
| 476 | |
| 477 | if (reqvid != data->currvid) { |
| 478 | if (write_new_vid(data, reqvid)) |
| 479 | return 1; |
| 480 | |
| 481 | if (savefid != data->currfid) { |
| 482 | printk(KERN_ERR PFX |
| 483 | "ph3: bad fid change, save 0x%x, curr 0x%x\n", |
| 484 | savefid, data->currfid); |
| 485 | return 1; |
| 486 | } |
| 487 | |
| 488 | if (data->currvid != reqvid) { |
| 489 | printk(KERN_ERR PFX |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 490 | "ph3: failed vid transition\n, " |
| 491 | "req 0x%x, curr 0x%x", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | reqvid, data->currvid); |
| 493 | return 1; |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | if (query_current_values_with_pending_wait(data)) |
| 498 | return 1; |
| 499 | |
| 500 | if (savereqvid != data->currvid) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 501 | pr_debug("ph3 failed, currvid 0x%x\n", data->currvid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | return 1; |
| 503 | } |
| 504 | |
| 505 | if (savefid != data->currfid) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 506 | pr_debug("ph3 failed, currfid changed 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | data->currfid); |
| 508 | return 1; |
| 509 | } |
| 510 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 511 | pr_debug("ph3 complete, currfid 0x%x, currvid 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | data->currfid, data->currvid); |
| 513 | |
| 514 | return 0; |
| 515 | } |
| 516 | |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 517 | static void check_supported_cpu(void *_rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | u32 eax, ebx, ecx, edx; |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 520 | int *rc = _rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 522 | *rc = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
Tejun Heo | 7b543a5 | 2010-12-18 16:30:05 +0100 | [diff] [blame] | 524 | if (__this_cpu_read(cpu_info.x86_vendor) != X86_VENDOR_AMD) |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 525 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | |
| 527 | eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 528 | if (((eax & CPUID_XFAM) != CPUID_XFAM_K8) && |
| 529 | ((eax & CPUID_XFAM) < CPUID_XFAM_10H)) |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 530 | return; |
Dave Jones | 2c906ae | 2006-02-28 00:36:32 -0500 | [diff] [blame] | 531 | |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 532 | if ((eax & CPUID_XFAM) == CPUID_XFAM_K8) { |
| 533 | if (((eax & CPUID_USE_XFAM_XMOD) != CPUID_USE_XFAM_XMOD) || |
Dave Jones | 99fbe1a | 2007-05-14 18:27:29 -0400 | [diff] [blame] | 534 | ((eax & CPUID_XMOD) > CPUID_XMOD_REV_MASK)) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 535 | printk(KERN_INFO PFX |
| 536 | "Processor cpuid %x not supported\n", eax); |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 537 | return; |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 538 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 540 | eax = cpuid_eax(CPUID_GET_MAX_CAPABILITIES); |
| 541 | if (eax < CPUID_FREQ_VOLT_CAPABILITIES) { |
| 542 | printk(KERN_INFO PFX |
| 543 | "No frequency change capabilities detected\n"); |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 544 | return; |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 545 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 547 | cpuid(CPUID_FREQ_VOLT_CAPABILITIES, &eax, &ebx, &ecx, &edx); |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 548 | if ((edx & P_STATE_TRANSITION_CAPABLE) |
| 549 | != P_STATE_TRANSITION_CAPABLE) { |
| 550 | printk(KERN_INFO PFX |
| 551 | "Power state transitions not supported\n"); |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 552 | return; |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 553 | } |
| 554 | } else { /* must be a HW Pstate capable processor */ |
| 555 | cpuid(CPUID_FREQ_VOLT_CAPABILITIES, &eax, &ebx, &ecx, &edx); |
| 556 | if ((edx & USE_HW_PSTATE) == USE_HW_PSTATE) |
| 557 | cpu_family = CPU_HW_PSTATE; |
| 558 | else |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 559 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | } |
| 561 | |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 562 | *rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | } |
| 564 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 565 | static int check_pst_table(struct powernow_k8_data *data, struct pst_s *pst, |
| 566 | u8 maxvid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | { |
| 568 | unsigned int j; |
| 569 | u8 lastfid = 0xff; |
| 570 | |
| 571 | for (j = 0; j < data->numps; j++) { |
| 572 | if (pst[j].vid > LEAST_VID) { |
Thomas Renninger | 2fd4709 | 2008-09-01 14:27:03 +0200 | [diff] [blame] | 573 | printk(KERN_ERR FW_BUG PFX "vid %d invalid : 0x%x\n", |
| 574 | j, pst[j].vid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | return -EINVAL; |
| 576 | } |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 577 | if (pst[j].vid < data->rvo) { |
| 578 | /* vid + rvo >= 0 */ |
Thomas Renninger | 2fd4709 | 2008-09-01 14:27:03 +0200 | [diff] [blame] | 579 | printk(KERN_ERR FW_BUG PFX "0 vid exceeded with pstate" |
| 580 | " %d\n", j); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | return -ENODEV; |
| 582 | } |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 583 | if (pst[j].vid < maxvid + data->rvo) { |
| 584 | /* vid + rvo >= maxvid */ |
Thomas Renninger | 2fd4709 | 2008-09-01 14:27:03 +0200 | [diff] [blame] | 585 | printk(KERN_ERR FW_BUG PFX "maxvid exceeded with pstate" |
| 586 | " %d\n", j); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | return -ENODEV; |
| 588 | } |
Jacob Shin | 8aae828 | 2005-11-21 07:23:08 -0800 | [diff] [blame] | 589 | if (pst[j].fid > MAX_FID) { |
Thomas Renninger | 2fd4709 | 2008-09-01 14:27:03 +0200 | [diff] [blame] | 590 | printk(KERN_ERR FW_BUG PFX "maxfid exceeded with pstate" |
| 591 | " %d\n", j); |
Jacob Shin | 8aae828 | 2005-11-21 07:23:08 -0800 | [diff] [blame] | 592 | return -ENODEV; |
| 593 | } |
Jacob Shin | 8aae828 | 2005-11-21 07:23:08 -0800 | [diff] [blame] | 594 | if (j && (pst[j].fid < HI_FID_TABLE_BOTTOM)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | /* Only first fid is allowed to be in "low" range */ |
Thomas Renninger | 2fd4709 | 2008-09-01 14:27:03 +0200 | [diff] [blame] | 596 | printk(KERN_ERR FW_BUG PFX "two low fids - %d : " |
| 597 | "0x%x\n", j, pst[j].fid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | return -EINVAL; |
| 599 | } |
| 600 | if (pst[j].fid < lastfid) |
| 601 | lastfid = pst[j].fid; |
| 602 | } |
| 603 | if (lastfid & 1) { |
Thomas Renninger | 2fd4709 | 2008-09-01 14:27:03 +0200 | [diff] [blame] | 604 | printk(KERN_ERR FW_BUG PFX "lastfid invalid\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | return -EINVAL; |
| 606 | } |
| 607 | if (lastfid > LO_FID_TABLE_TOP) |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 608 | printk(KERN_INFO FW_BUG PFX |
| 609 | "first fid not from lo freq table\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | |
| 611 | return 0; |
| 612 | } |
| 613 | |
Kurt Roeckx | f0adb13 | 2009-09-16 11:09:32 -0400 | [diff] [blame] | 614 | static void invalidate_entry(struct cpufreq_frequency_table *powernow_table, |
| 615 | unsigned int entry) |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 616 | { |
Kurt Roeckx | f0adb13 | 2009-09-16 11:09:32 -0400 | [diff] [blame] | 617 | powernow_table[entry].frequency = CPUFREQ_ENTRY_INVALID; |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 618 | } |
| 619 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | static void print_basics(struct powernow_k8_data *data) |
| 621 | { |
| 622 | int j; |
| 623 | for (j = 0; j < data->numps; j++) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 624 | if (data->powernow_table[j].frequency != |
| 625 | CPUFREQ_ENTRY_INVALID) { |
Langsdorf, Mark | e7bdd7a | 2006-06-08 10:30:17 -0500 | [diff] [blame] | 626 | if (cpu_family == CPU_HW_PSTATE) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 627 | printk(KERN_INFO PFX |
| 628 | " %d : pstate %d (%d MHz)\n", j, |
Yinghai Lu | 4ae5c49 | 2007-11-20 19:38:27 -0800 | [diff] [blame] | 629 | data->powernow_table[j].index, |
Dave Jones | 9a60ddb | 2007-07-13 01:34:10 -0400 | [diff] [blame] | 630 | data->powernow_table[j].frequency/1000); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 631 | } else { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 632 | printk(KERN_INFO PFX |
Thomas Renninger | 9e91869 | 2011-03-03 21:31:24 +0100 | [diff] [blame] | 633 | "fid 0x%x (%d MHz), vid 0x%x\n", |
Dave Jones | 9a60ddb | 2007-07-13 01:34:10 -0400 | [diff] [blame] | 634 | data->powernow_table[j].index & 0xff, |
| 635 | data->powernow_table[j].frequency/1000, |
| 636 | data->powernow_table[j].index >> 8); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 637 | } |
| 638 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | } |
| 640 | if (data->batps) |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 641 | printk(KERN_INFO PFX "Only %d pstates on battery\n", |
| 642 | data->batps); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | } |
| 644 | |
Andreas Herrmann | ca446d0 | 2009-04-22 13:48:33 +0200 | [diff] [blame] | 645 | static u32 freq_from_fid_did(u32 fid, u32 did) |
| 646 | { |
| 647 | u32 mhz = 0; |
| 648 | |
| 649 | if (boot_cpu_data.x86 == 0x10) |
| 650 | mhz = (100 * (fid + 0x10)) >> did; |
| 651 | else if (boot_cpu_data.x86 == 0x11) |
| 652 | mhz = (100 * (fid + 8)) >> did; |
| 653 | else |
| 654 | BUG(); |
| 655 | |
| 656 | return mhz * 1000; |
| 657 | } |
| 658 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 659 | static int fill_powernow_table(struct powernow_k8_data *data, |
| 660 | struct pst_s *pst, u8 maxvid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | { |
| 662 | struct cpufreq_frequency_table *powernow_table; |
| 663 | unsigned int j; |
| 664 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 665 | if (data->batps) { |
| 666 | /* use ACPI support to get full speed on mains power */ |
| 667 | printk(KERN_WARNING PFX |
| 668 | "Only %d pstates usable (use ACPI driver for full " |
| 669 | "range\n", data->batps); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | data->numps = data->batps; |
| 671 | } |
| 672 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 673 | for (j = 1; j < data->numps; j++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | if (pst[j-1].fid >= pst[j].fid) { |
| 675 | printk(KERN_ERR PFX "PST out of sequence\n"); |
| 676 | return -EINVAL; |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | if (data->numps < 2) { |
| 681 | printk(KERN_ERR PFX "no p states to transition\n"); |
| 682 | return -ENODEV; |
| 683 | } |
| 684 | |
| 685 | if (check_pst_table(data, pst, maxvid)) |
| 686 | return -EINVAL; |
| 687 | |
| 688 | powernow_table = kmalloc((sizeof(struct cpufreq_frequency_table) |
| 689 | * (data->numps + 1)), GFP_KERNEL); |
| 690 | if (!powernow_table) { |
| 691 | printk(KERN_ERR PFX "powernow_table memory alloc failure\n"); |
| 692 | return -ENOMEM; |
| 693 | } |
| 694 | |
| 695 | for (j = 0; j < data->numps; j++) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 696 | int freq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | powernow_table[j].index = pst[j].fid; /* lower 8 bits */ |
| 698 | powernow_table[j].index |= (pst[j].vid << 8); /* upper 8 bits */ |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 699 | freq = find_khz_freq_from_fid(pst[j].fid); |
| 700 | powernow_table[j].frequency = freq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | } |
| 702 | powernow_table[data->numps].frequency = CPUFREQ_TABLE_END; |
| 703 | powernow_table[data->numps].index = 0; |
| 704 | |
| 705 | if (query_current_values_with_pending_wait(data)) { |
| 706 | kfree(powernow_table); |
| 707 | return -EIO; |
| 708 | } |
| 709 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 710 | pr_debug("cfid 0x%x, cvid 0x%x\n", data->currfid, data->currvid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | data->powernow_table = powernow_table; |
Rusty Russell | 7ad728f | 2009-03-13 14:49:50 +1030 | [diff] [blame] | 712 | if (cpumask_first(cpu_core_mask(data->cpu)) == data->cpu) |
Mark Langsdorf | 2e49762 | 2007-04-30 14:15:05 -0500 | [diff] [blame] | 713 | print_basics(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | |
| 715 | for (j = 0; j < data->numps; j++) |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 716 | if ((pst[j].fid == data->currfid) && |
| 717 | (pst[j].vid == data->currvid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | return 0; |
| 719 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 720 | pr_debug("currfid/vid do not match PST, ignoring\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | return 0; |
| 722 | } |
| 723 | |
| 724 | /* Find and validate the PSB/PST table in BIOS. */ |
| 725 | static int find_psb_table(struct powernow_k8_data *data) |
| 726 | { |
| 727 | struct psb_s *psb; |
| 728 | unsigned int i; |
| 729 | u32 mvs; |
| 730 | u8 maxvid; |
| 731 | u32 cpst = 0; |
| 732 | u32 thiscpuid; |
| 733 | |
| 734 | for (i = 0xc0000; i < 0xffff0; i += 0x10) { |
| 735 | /* Scan BIOS looking for the signature. */ |
| 736 | /* It can not be at ffff0 - it is too big. */ |
| 737 | |
| 738 | psb = phys_to_virt(i); |
| 739 | if (memcmp(psb, PSB_ID_STRING, PSB_ID_STRING_LEN) != 0) |
| 740 | continue; |
| 741 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 742 | pr_debug("found PSB header at 0x%p\n", psb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 744 | pr_debug("table vers: 0x%x\n", psb->tableversion); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | if (psb->tableversion != PSB_VERSION_1_4) { |
Thomas Renninger | 2fd4709 | 2008-09-01 14:27:03 +0200 | [diff] [blame] | 746 | printk(KERN_ERR FW_BUG PFX "PSB table is not v1.4\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | return -ENODEV; |
| 748 | } |
| 749 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 750 | pr_debug("flags: 0x%x\n", psb->flags1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | if (psb->flags1) { |
Thomas Renninger | 2fd4709 | 2008-09-01 14:27:03 +0200 | [diff] [blame] | 752 | printk(KERN_ERR FW_BUG PFX "unknown flags\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | return -ENODEV; |
| 754 | } |
| 755 | |
| 756 | data->vstable = psb->vstable; |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 757 | pr_debug("voltage stabilization time: %d(*20us)\n", |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 758 | data->vstable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 760 | pr_debug("flags2: 0x%x\n", psb->flags2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | data->rvo = psb->flags2 & 3; |
| 762 | data->irt = ((psb->flags2) >> 2) & 3; |
| 763 | mvs = ((psb->flags2) >> 4) & 3; |
| 764 | data->vidmvs = 1 << mvs; |
| 765 | data->batps = ((psb->flags2) >> 6) & 3; |
| 766 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 767 | pr_debug("ramp voltage offset: %d\n", data->rvo); |
| 768 | pr_debug("isochronous relief time: %d\n", data->irt); |
| 769 | pr_debug("maximum voltage step: %d - 0x%x\n", mvs, data->vidmvs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 771 | pr_debug("numpst: 0x%x\n", psb->num_tables); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | cpst = psb->num_tables; |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 773 | if ((psb->cpuid == 0x00000fc0) || |
| 774 | (psb->cpuid == 0x00000fe0)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | thiscpuid = cpuid_eax(CPUID_PROCESSOR_SIGNATURE); |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 776 | if ((thiscpuid == 0x00000fc0) || |
| 777 | (thiscpuid == 0x00000fe0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | cpst = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | } |
| 780 | if (cpst != 1) { |
Thomas Renninger | 2fd4709 | 2008-09-01 14:27:03 +0200 | [diff] [blame] | 781 | printk(KERN_ERR FW_BUG PFX "numpst must be 1\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | return -ENODEV; |
| 783 | } |
| 784 | |
| 785 | data->plllock = psb->plllocktime; |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 786 | pr_debug("plllocktime: 0x%x (units 1us)\n", psb->plllocktime); |
| 787 | pr_debug("maxfid: 0x%x\n", psb->maxfid); |
| 788 | pr_debug("maxvid: 0x%x\n", psb->maxvid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | maxvid = psb->maxvid; |
| 790 | |
| 791 | data->numps = psb->numps; |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 792 | pr_debug("numpstates: 0x%x\n", data->numps); |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 793 | return fill_powernow_table(data, |
| 794 | (struct pst_s *)(psb+1), maxvid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | } |
| 796 | /* |
| 797 | * If you see this message, complain to BIOS manufacturer. If |
| 798 | * he tells you "we do not support Linux" or some similar |
| 799 | * nonsense, remember that Windows 2000 uses the same legacy |
| 800 | * mechanism that the old Linux PSB driver uses. Tell them it |
| 801 | * is broken with Windows 2000. |
| 802 | * |
| 803 | * The reference to the AMD documentation is chapter 9 in the |
| 804 | * BIOS and Kernel Developer's Guide, which is available on |
| 805 | * www.amd.com |
| 806 | */ |
Thomas Renninger | 79cc56a | 2009-02-04 11:56:11 +0100 | [diff] [blame] | 807 | printk(KERN_ERR FW_BUG PFX "No PSB or ACPI _PSS objects\n"); |
Marti Raudsepp | 298decf | 2010-01-20 19:19:33 +0200 | [diff] [blame] | 808 | printk(KERN_ERR PFX "Make sure that your BIOS is up to date" |
| 809 | " and Cool'N'Quiet support is enabled in BIOS setup\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | return -ENODEV; |
| 811 | } |
| 812 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 813 | static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, |
| 814 | unsigned int index) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | { |
Lin Ming | 439913f | 2010-01-28 10:53:19 +0800 | [diff] [blame] | 816 | u64 control; |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 817 | |
Linus Torvalds | f607e3a | 2008-08-19 13:34:59 -0700 | [diff] [blame] | 818 | if (!data->acpi_data.state_count || (cpu_family == CPU_HW_PSTATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | return; |
| 820 | |
Luis Henriques | 21335d0 | 2009-04-23 19:45:04 +0100 | [diff] [blame] | 821 | control = data->acpi_data.states[index].control; |
| 822 | data->irt = (control >> IRT_SHIFT) & IRT_MASK; |
| 823 | data->rvo = (control >> RVO_SHIFT) & RVO_MASK; |
| 824 | data->exttype = (control >> EXT_TYPE_SHIFT) & EXT_TYPE_MASK; |
| 825 | data->plllock = (control >> PLL_L_SHIFT) & PLL_L_MASK; |
| 826 | data->vidmvs = 1 << ((control >> MVS_SHIFT) & MVS_MASK); |
| 827 | data->vstable = (control >> VST_SHIFT) & VST_MASK; |
| 828 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | |
| 830 | static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data) |
| 831 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | struct cpufreq_frequency_table *powernow_table; |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 833 | int ret_val = -ENODEV; |
Lin Ming | 439913f | 2010-01-28 10:53:19 +0800 | [diff] [blame] | 834 | u64 control, status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | |
Linus Torvalds | f607e3a | 2008-08-19 13:34:59 -0700 | [diff] [blame] | 836 | if (acpi_processor_register_performance(&data->acpi_data, data->cpu)) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 837 | pr_debug("register performance failed: bad ACPI data\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | return -EIO; |
| 839 | } |
| 840 | |
| 841 | /* verify the data contained in the ACPI structures */ |
Linus Torvalds | f607e3a | 2008-08-19 13:34:59 -0700 | [diff] [blame] | 842 | if (data->acpi_data.state_count <= 1) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 843 | pr_debug("No ACPI P-States\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | goto err_out; |
| 845 | } |
| 846 | |
Dave Jones | 2c701b1 | 2009-06-05 12:37:07 -0400 | [diff] [blame] | 847 | control = data->acpi_data.control_register.space_id; |
| 848 | status = data->acpi_data.status_register.space_id; |
| 849 | |
| 850 | if ((control != ACPI_ADR_SPACE_FIXED_HARDWARE) || |
| 851 | (status != ACPI_ADR_SPACE_FIXED_HARDWARE)) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 852 | pr_debug("Invalid control/status registers (%llx - %llx)\n", |
Dave Jones | 2c701b1 | 2009-06-05 12:37:07 -0400 | [diff] [blame] | 853 | control, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | goto err_out; |
| 855 | } |
| 856 | |
| 857 | /* fill in data->powernow_table */ |
| 858 | powernow_table = kmalloc((sizeof(struct cpufreq_frequency_table) |
Linus Torvalds | f607e3a | 2008-08-19 13:34:59 -0700 | [diff] [blame] | 859 | * (data->acpi_data.state_count + 1)), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | if (!powernow_table) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 861 | pr_debug("powernow_table memory alloc failure\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | goto err_out; |
| 863 | } |
| 864 | |
Mark Langsdorf | db39d55 | 2009-08-21 19:15:28 -0500 | [diff] [blame] | 865 | /* fill in data */ |
| 866 | data->numps = data->acpi_data.state_count; |
| 867 | powernow_k8_acpi_pst_values(data, 0); |
| 868 | |
Langsdorf, Mark | e7bdd7a | 2006-06-08 10:30:17 -0500 | [diff] [blame] | 869 | if (cpu_family == CPU_HW_PSTATE) |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 870 | ret_val = fill_powernow_table_pstate(data, powernow_table); |
| 871 | else |
| 872 | ret_val = fill_powernow_table_fidvid(data, powernow_table); |
| 873 | if (ret_val) |
| 874 | goto err_out_mem; |
| 875 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 876 | powernow_table[data->acpi_data.state_count].frequency = |
| 877 | CPUFREQ_TABLE_END; |
Linus Torvalds | f607e3a | 2008-08-19 13:34:59 -0700 | [diff] [blame] | 878 | powernow_table[data->acpi_data.state_count].index = 0; |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 879 | data->powernow_table = powernow_table; |
| 880 | |
Rusty Russell | 7ad728f | 2009-03-13 14:49:50 +1030 | [diff] [blame] | 881 | if (cpumask_first(cpu_core_mask(data->cpu)) == data->cpu) |
Mark Langsdorf | 2e49762 | 2007-04-30 14:15:05 -0500 | [diff] [blame] | 882 | print_basics(data); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 883 | |
| 884 | /* notify BIOS that we exist */ |
| 885 | acpi_processor_notify_smm(THIS_MODULE); |
| 886 | |
Yinghai Lu | eaa9584 | 2009-06-06 14:51:36 -0700 | [diff] [blame] | 887 | if (!zalloc_cpumask_var(&data->acpi_data.shared_cpu_map, GFP_KERNEL)) { |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 888 | printk(KERN_ERR PFX |
| 889 | "unable to alloc powernow_k8_data cpumask\n"); |
| 890 | ret_val = -ENOMEM; |
| 891 | goto err_out_mem; |
| 892 | } |
| 893 | |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 894 | return 0; |
| 895 | |
| 896 | err_out_mem: |
| 897 | kfree(powernow_table); |
| 898 | |
| 899 | err_out: |
Linus Torvalds | f607e3a | 2008-08-19 13:34:59 -0700 | [diff] [blame] | 900 | acpi_processor_unregister_performance(&data->acpi_data, data->cpu); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 901 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 902 | /* data->acpi_data.state_count informs us at ->exit() |
| 903 | * whether ACPI was used */ |
Linus Torvalds | f607e3a | 2008-08-19 13:34:59 -0700 | [diff] [blame] | 904 | data->acpi_data.state_count = 0; |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 905 | |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 906 | return ret_val; |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 907 | } |
| 908 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 909 | static int fill_powernow_table_pstate(struct powernow_k8_data *data, |
| 910 | struct cpufreq_frequency_table *powernow_table) |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 911 | { |
| 912 | int i; |
Mark Langsdorf | c5829cd | 2007-10-17 16:52:08 -0500 | [diff] [blame] | 913 | u32 hi = 0, lo = 0; |
Borislav Petkov | b30d330 | 2010-07-08 18:05:14 +0200 | [diff] [blame] | 914 | rdmsr(MSR_PSTATE_CUR_LIMIT, lo, hi); |
| 915 | data->max_hw_pstate = (lo & HW_PSTATE_MAX_MASK) >> HW_PSTATE_MAX_SHIFT; |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 916 | |
Linus Torvalds | f607e3a | 2008-08-19 13:34:59 -0700 | [diff] [blame] | 917 | for (i = 0; i < data->acpi_data.state_count; i++) { |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 918 | u32 index; |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 919 | |
Linus Torvalds | f607e3a | 2008-08-19 13:34:59 -0700 | [diff] [blame] | 920 | index = data->acpi_data.states[i].control & HW_PSTATE_MASK; |
Mark Langsdorf | c5829cd | 2007-10-17 16:52:08 -0500 | [diff] [blame] | 921 | if (index > data->max_hw_pstate) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 922 | printk(KERN_ERR PFX "invalid pstate %d - " |
| 923 | "bad value %d.\n", i, index); |
| 924 | printk(KERN_ERR PFX "Please report to BIOS " |
| 925 | "manufacturer\n"); |
Kurt Roeckx | f0adb13 | 2009-09-16 11:09:32 -0400 | [diff] [blame] | 926 | invalidate_entry(powernow_table, i); |
Mark Langsdorf | c5829cd | 2007-10-17 16:52:08 -0500 | [diff] [blame] | 927 | continue; |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 928 | } |
| 929 | rdmsr(MSR_PSTATE_DEF_BASE + index, lo, hi); |
| 930 | if (!(hi & HW_PSTATE_VALID_MASK)) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 931 | pr_debug("invalid pstate %d, ignoring\n", index); |
Kurt Roeckx | f0adb13 | 2009-09-16 11:09:32 -0400 | [diff] [blame] | 932 | invalidate_entry(powernow_table, i); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 933 | continue; |
| 934 | } |
| 935 | |
Mark Langsdorf | c5829cd | 2007-10-17 16:52:08 -0500 | [diff] [blame] | 936 | powernow_table[i].index = index; |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 937 | |
Andreas Herrmann | ca446d0 | 2009-04-22 13:48:33 +0200 | [diff] [blame] | 938 | /* Frequency may be rounded for these */ |
Mark Langsdorf | 6793706 | 2010-03-31 21:56:45 +0200 | [diff] [blame] | 939 | if ((boot_cpu_data.x86 == 0x10 && boot_cpu_data.x86_model < 10) |
| 940 | || boot_cpu_data.x86 == 0x11) { |
Andreas Herrmann | ca446d0 | 2009-04-22 13:48:33 +0200 | [diff] [blame] | 941 | powernow_table[i].frequency = |
| 942 | freq_from_fid_did(lo & 0x3f, (lo >> 6) & 7); |
| 943 | } else |
| 944 | powernow_table[i].frequency = |
| 945 | data->acpi_data.states[i].core_frequency * 1000; |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 946 | } |
| 947 | return 0; |
| 948 | } |
| 949 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 950 | static int fill_powernow_table_fidvid(struct powernow_k8_data *data, |
| 951 | struct cpufreq_frequency_table *powernow_table) |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 952 | { |
| 953 | int i; |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 954 | |
Linus Torvalds | f607e3a | 2008-08-19 13:34:59 -0700 | [diff] [blame] | 955 | for (i = 0; i < data->acpi_data.state_count; i++) { |
Dave Jones | 094ce7f | 2005-07-29 12:55:40 -0700 | [diff] [blame] | 956 | u32 fid; |
| 957 | u32 vid; |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 958 | u32 freq, index; |
Lin Ming | 439913f | 2010-01-28 10:53:19 +0800 | [diff] [blame] | 959 | u64 status, control; |
Dave Jones | 094ce7f | 2005-07-29 12:55:40 -0700 | [diff] [blame] | 960 | |
| 961 | if (data->exttype) { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 962 | status = data->acpi_data.states[i].status; |
| 963 | fid = status & EXT_FID_MASK; |
| 964 | vid = (status >> VID_SHIFT) & EXT_VID_MASK; |
Dave Jones | 841e40b | 2005-07-28 09:40:04 -0700 | [diff] [blame] | 965 | } else { |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 966 | control = data->acpi_data.states[i].control; |
| 967 | fid = control & FID_MASK; |
| 968 | vid = (control >> VID_SHIFT) & VID_MASK; |
Dave Jones | 841e40b | 2005-07-28 09:40:04 -0700 | [diff] [blame] | 969 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 971 | pr_debug(" %d : fid 0x%x, vid 0x%x\n", i, fid, vid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 973 | index = fid | (vid<<8); |
| 974 | powernow_table[i].index = index; |
| 975 | |
| 976 | freq = find_khz_freq_from_fid(fid); |
| 977 | powernow_table[i].frequency = freq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | |
| 979 | /* verify frequency is OK */ |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 980 | if ((freq > (MAX_FREQ * 1000)) || (freq < (MIN_FREQ * 1000))) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 981 | pr_debug("invalid freq %u kHz, ignoring\n", freq); |
Kurt Roeckx | f0adb13 | 2009-09-16 11:09:32 -0400 | [diff] [blame] | 982 | invalidate_entry(powernow_table, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | continue; |
| 984 | } |
| 985 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 986 | /* verify voltage is OK - |
| 987 | * BIOSs are using "off" to indicate invalid */ |
Dave Jones | 841e40b | 2005-07-28 09:40:04 -0700 | [diff] [blame] | 988 | if (vid == VID_OFF) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 989 | pr_debug("invalid vid %u, ignoring\n", vid); |
Kurt Roeckx | f0adb13 | 2009-09-16 11:09:32 -0400 | [diff] [blame] | 990 | invalidate_entry(powernow_table, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | continue; |
| 992 | } |
| 993 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 994 | if (freq != (data->acpi_data.states[i].core_frequency * 1000)) { |
| 995 | printk(KERN_INFO PFX "invalid freq entries " |
| 996 | "%u kHz vs. %u kHz\n", freq, |
| 997 | (unsigned int) |
| 998 | (data->acpi_data.states[i].core_frequency |
| 999 | * 1000)); |
Kurt Roeckx | f0adb13 | 2009-09-16 11:09:32 -0400 | [diff] [blame] | 1000 | invalidate_entry(powernow_table, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | continue; |
| 1002 | } |
| 1003 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | } |
| 1006 | |
| 1007 | static void powernow_k8_cpu_exit_acpi(struct powernow_k8_data *data) |
| 1008 | { |
Linus Torvalds | f607e3a | 2008-08-19 13:34:59 -0700 | [diff] [blame] | 1009 | if (data->acpi_data.state_count) |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1010 | acpi_processor_unregister_performance(&data->acpi_data, |
| 1011 | data->cpu); |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 1012 | free_cpumask_var(data->acpi_data.shared_cpu_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | } |
| 1014 | |
Mark Langsdorf | 732553e | 2009-02-03 17:46:43 +0100 | [diff] [blame] | 1015 | static int get_transition_latency(struct powernow_k8_data *data) |
| 1016 | { |
| 1017 | int max_latency = 0; |
| 1018 | int i; |
| 1019 | for (i = 0; i < data->acpi_data.state_count; i++) { |
| 1020 | int cur_latency = data->acpi_data.states[i].transition_latency |
| 1021 | + data->acpi_data.states[i].bus_master_latency; |
| 1022 | if (cur_latency > max_latency) |
| 1023 | max_latency = cur_latency; |
| 1024 | } |
Thomas Renninger | 86e1368 | 2009-04-22 13:48:30 +0200 | [diff] [blame] | 1025 | if (max_latency == 0) { |
| 1026 | /* |
Borislav Petkov | c2f4a2c | 2010-07-08 17:55:30 +0200 | [diff] [blame] | 1027 | * Fam 11h and later may return 0 as transition latency. This |
| 1028 | * is intended and means "very fast". While cpufreq core and |
| 1029 | * governors currently can handle that gracefully, better set it |
| 1030 | * to 1 to avoid problems in the future. |
Thomas Renninger | 86e1368 | 2009-04-22 13:48:30 +0200 | [diff] [blame] | 1031 | */ |
Borislav Petkov | c2f4a2c | 2010-07-08 17:55:30 +0200 | [diff] [blame] | 1032 | if (boot_cpu_data.x86 < 0x11) |
Thomas Renninger | 86e1368 | 2009-04-22 13:48:30 +0200 | [diff] [blame] | 1033 | printk(KERN_ERR FW_WARN PFX "Invalid zero transition " |
| 1034 | "latency\n"); |
| 1035 | max_latency = 1; |
| 1036 | } |
Mark Langsdorf | 732553e | 2009-02-03 17:46:43 +0100 | [diff] [blame] | 1037 | /* value in usecs, needs to be in nanoseconds */ |
| 1038 | return 1000 * max_latency; |
| 1039 | } |
| 1040 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | /* Take a frequency, and issue the fid/vid transition command */ |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1042 | static int transition_frequency_fidvid(struct powernow_k8_data *data, |
| 1043 | unsigned int index) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | { |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1045 | u32 fid = 0; |
| 1046 | u32 vid = 0; |
Dave Jones | 065b807 | 2005-05-31 19:03:46 -0700 | [diff] [blame] | 1047 | int res, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | struct cpufreq_freqs freqs; |
| 1049 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 1050 | pr_debug("cpu %d transition to index %u\n", smp_processor_id(), index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1052 | /* fid/vid correctness check for k8 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | /* fid are the lower 8 bits of the index we stored into |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1054 | * the cpufreq frequency table in find_psb_table, vid |
| 1055 | * are the upper 8 bits. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | fid = data->powernow_table[index].index & 0xFF; |
| 1058 | vid = (data->powernow_table[index].index & 0xFF00) >> 8; |
| 1059 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 1060 | pr_debug("table matched fid 0x%x, giving vid 0x%x\n", fid, vid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | |
| 1062 | if (query_current_values_with_pending_wait(data)) |
| 1063 | return 1; |
| 1064 | |
| 1065 | if ((data->currvid == vid) && (data->currfid == fid)) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 1066 | pr_debug("target matches current values (fid 0x%x, vid 0x%x)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | fid, vid); |
| 1068 | return 0; |
| 1069 | } |
| 1070 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 1071 | pr_debug("cpu %d, changing to fid 0x%x, vid 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | smp_processor_id(), fid, vid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | freqs.old = find_khz_freq_from_fid(data->currfid); |
| 1074 | freqs.new = find_khz_freq_from_fid(fid); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1075 | |
Rusty Russell | 8e7c259 | 2009-06-12 20:58:37 +0930 | [diff] [blame] | 1076 | for_each_cpu(i, data->available_cores) { |
Dave Jones | 065b807 | 2005-05-31 19:03:46 -0700 | [diff] [blame] | 1077 | freqs.cpu = i; |
| 1078 | cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); |
| 1079 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | res = transition_fid_vid(data, fid, vid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | freqs.new = find_khz_freq_from_fid(data->currfid); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1083 | |
Rusty Russell | 8e7c259 | 2009-06-12 20:58:37 +0930 | [diff] [blame] | 1084 | for_each_cpu(i, data->available_cores) { |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1085 | freqs.cpu = i; |
| 1086 | cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); |
| 1087 | } |
| 1088 | return res; |
| 1089 | } |
| 1090 | |
| 1091 | /* Take a frequency, and issue the hardware pstate transition command */ |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1092 | static int transition_frequency_pstate(struct powernow_k8_data *data, |
| 1093 | unsigned int index) |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1094 | { |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1095 | u32 pstate = 0; |
| 1096 | int res, i; |
| 1097 | struct cpufreq_freqs freqs; |
| 1098 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 1099 | pr_debug("cpu %d transition to index %u\n", smp_processor_id(), index); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1100 | |
Mark Langsdorf | c5829cd | 2007-10-17 16:52:08 -0500 | [diff] [blame] | 1101 | /* get MSR index for hardware pstate transition */ |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1102 | pstate = index & HW_PSTATE_MASK; |
Mark Langsdorf | c5829cd | 2007-10-17 16:52:08 -0500 | [diff] [blame] | 1103 | if (pstate > data->max_hw_pstate) |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1104 | return 0; |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1105 | freqs.old = find_khz_freq_from_pstate(data->powernow_table, |
| 1106 | data->currpstate); |
Mark Langsdorf | c5829cd | 2007-10-17 16:52:08 -0500 | [diff] [blame] | 1107 | freqs.new = find_khz_freq_from_pstate(data->powernow_table, pstate); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1108 | |
Rusty Russell | 8e7c259 | 2009-06-12 20:58:37 +0930 | [diff] [blame] | 1109 | for_each_cpu(i, data->available_cores) { |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1110 | freqs.cpu = i; |
| 1111 | cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); |
| 1112 | } |
| 1113 | |
| 1114 | res = transition_pstate(data, pstate); |
Mark Langsdorf | c5829cd | 2007-10-17 16:52:08 -0500 | [diff] [blame] | 1115 | freqs.new = find_khz_freq_from_pstate(data->powernow_table, pstate); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1116 | |
Rusty Russell | 8e7c259 | 2009-06-12 20:58:37 +0930 | [diff] [blame] | 1117 | for_each_cpu(i, data->available_cores) { |
Dave Jones | 065b807 | 2005-05-31 19:03:46 -0700 | [diff] [blame] | 1118 | freqs.cpu = i; |
| 1119 | cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); |
Dave Jones | 2e3f8fa | 2006-05-30 17:25:14 -0400 | [diff] [blame] | 1120 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | return res; |
| 1122 | } |
| 1123 | |
| 1124 | /* Driver entry point to switch to the target frequency */ |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1125 | static int powernowk8_target(struct cpufreq_policy *pol, |
| 1126 | unsigned targfreq, unsigned relation) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | { |
Rusty Russell | b8cbe7e | 2009-11-03 14:57:56 +1030 | [diff] [blame] | 1128 | cpumask_var_t oldmask; |
travis@sgi.com | 2c6b8c0 | 2008-01-30 13:33:11 +0100 | [diff] [blame] | 1129 | struct powernow_k8_data *data = per_cpu(powernow_data, pol->cpu); |
Adrian Bunk | 9180053 | 2006-04-19 00:07:28 +0200 | [diff] [blame] | 1130 | u32 checkfid; |
| 1131 | u32 checkvid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | unsigned int newstate; |
| 1133 | int ret = -EIO; |
| 1134 | |
Jacob Shin | 4211a30 | 2006-04-07 19:49:51 +0200 | [diff] [blame] | 1135 | if (!data) |
| 1136 | return -EINVAL; |
| 1137 | |
Adrian Bunk | 9180053 | 2006-04-19 00:07:28 +0200 | [diff] [blame] | 1138 | checkfid = data->currfid; |
| 1139 | checkvid = data->currvid; |
| 1140 | |
Rusty Russell | b8cbe7e | 2009-11-03 14:57:56 +1030 | [diff] [blame] | 1141 | /* only run on specific CPU from here on. */ |
| 1142 | /* This is poor form: use a workqueue or smp_call_function_single */ |
| 1143 | if (!alloc_cpumask_var(&oldmask, GFP_KERNEL)) |
| 1144 | return -ENOMEM; |
| 1145 | |
Rusty Russell | a463681 | 2009-12-17 11:43:29 -0600 | [diff] [blame] | 1146 | cpumask_copy(oldmask, tsk_cpus_allowed(current)); |
Rusty Russell | b8cbe7e | 2009-11-03 14:57:56 +1030 | [diff] [blame] | 1147 | set_cpus_allowed_ptr(current, cpumask_of(pol->cpu)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | |
| 1149 | if (smp_processor_id() != pol->cpu) { |
Jacob Shin | 8aae828 | 2005-11-21 07:23:08 -0800 | [diff] [blame] | 1150 | printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | goto err_out; |
| 1152 | } |
| 1153 | |
| 1154 | if (pending_bit_stuck()) { |
| 1155 | printk(KERN_ERR PFX "failing targ, change pending bit set\n"); |
| 1156 | goto err_out; |
| 1157 | } |
| 1158 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 1159 | pr_debug("targ: cpu %d, %d kHz, min %d, max %d, relation %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | pol->cpu, targfreq, pol->min, pol->max, relation); |
| 1161 | |
Dave Jones | 8384451 | 2006-05-30 17:43:54 -0400 | [diff] [blame] | 1162 | if (query_current_values_with_pending_wait(data)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | |
Mark Langsdorf | c5829cd | 2007-10-17 16:52:08 -0500 | [diff] [blame] | 1165 | if (cpu_family != CPU_HW_PSTATE) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 1166 | pr_debug("targ: curr fid 0x%x, vid 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | data->currfid, data->currvid); |
| 1168 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1169 | if ((checkvid != data->currvid) || |
| 1170 | (checkfid != data->currfid)) { |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1171 | printk(KERN_INFO PFX |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1172 | "error - out of sync, fix 0x%x 0x%x, " |
| 1173 | "vid 0x%x 0x%x\n", |
| 1174 | checkfid, data->currfid, |
| 1175 | checkvid, data->currvid); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1176 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | } |
| 1178 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1179 | if (cpufreq_frequency_table_target(pol, data->powernow_table, |
| 1180 | targfreq, relation, &newstate)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | goto err_out; |
| 1182 | |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1183 | mutex_lock(&fidvid_mutex); |
Dave Jones | 065b807 | 2005-05-31 19:03:46 -0700 | [diff] [blame] | 1184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | powernow_k8_acpi_pst_values(data, newstate); |
| 1186 | |
Langsdorf, Mark | e7bdd7a | 2006-06-08 10:30:17 -0500 | [diff] [blame] | 1187 | if (cpu_family == CPU_HW_PSTATE) |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1188 | ret = transition_frequency_pstate(data, newstate); |
| 1189 | else |
| 1190 | ret = transition_frequency_fidvid(data, newstate); |
| 1191 | if (ret) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | printk(KERN_ERR PFX "transition frequency failed\n"); |
| 1193 | ret = 1; |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1194 | mutex_unlock(&fidvid_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | goto err_out; |
| 1196 | } |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1197 | mutex_unlock(&fidvid_mutex); |
Dave Jones | 065b807 | 2005-05-31 19:03:46 -0700 | [diff] [blame] | 1198 | |
Langsdorf, Mark | e7bdd7a | 2006-06-08 10:30:17 -0500 | [diff] [blame] | 1199 | if (cpu_family == CPU_HW_PSTATE) |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1200 | pol->cur = find_khz_freq_from_pstate(data->powernow_table, |
| 1201 | newstate); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1202 | else |
| 1203 | pol->cur = find_khz_freq_from_fid(data->currfid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | ret = 0; |
| 1205 | |
| 1206 | err_out: |
Rusty Russell | b8cbe7e | 2009-11-03 14:57:56 +1030 | [diff] [blame] | 1207 | set_cpus_allowed_ptr(current, oldmask); |
| 1208 | free_cpumask_var(oldmask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | return ret; |
| 1210 | } |
| 1211 | |
| 1212 | /* Driver entry point to verify the policy and range of frequencies */ |
| 1213 | static int powernowk8_verify(struct cpufreq_policy *pol) |
| 1214 | { |
travis@sgi.com | 2c6b8c0 | 2008-01-30 13:33:11 +0100 | [diff] [blame] | 1215 | struct powernow_k8_data *data = per_cpu(powernow_data, pol->cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | |
Jacob Shin | 4211a30 | 2006-04-07 19:49:51 +0200 | [diff] [blame] | 1217 | if (!data) |
| 1218 | return -EINVAL; |
| 1219 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | return cpufreq_frequency_table_verify(pol, data->powernow_table); |
| 1221 | } |
| 1222 | |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 1223 | struct init_on_cpu { |
| 1224 | struct powernow_k8_data *data; |
| 1225 | int rc; |
| 1226 | }; |
| 1227 | |
| 1228 | static void __cpuinit powernowk8_cpu_init_on_cpu(void *_init_on_cpu) |
| 1229 | { |
| 1230 | struct init_on_cpu *init_on_cpu = _init_on_cpu; |
| 1231 | |
| 1232 | if (pending_bit_stuck()) { |
| 1233 | printk(KERN_ERR PFX "failing init, change pending bit set\n"); |
| 1234 | init_on_cpu->rc = -ENODEV; |
| 1235 | return; |
| 1236 | } |
| 1237 | |
| 1238 | if (query_current_values_with_pending_wait(init_on_cpu->data)) { |
| 1239 | init_on_cpu->rc = -ENODEV; |
| 1240 | return; |
| 1241 | } |
| 1242 | |
| 1243 | if (cpu_family == CPU_OPTERON) |
| 1244 | fidvid_msr_init(); |
| 1245 | |
| 1246 | init_on_cpu->rc = 0; |
| 1247 | } |
| 1248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | /* per CPU init entry point to the driver */ |
Andi Kleen | aa41eb9 | 2006-01-16 01:56:36 +0100 | [diff] [blame] | 1250 | static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | { |
Andrew Morton | b394f1d | 2009-06-10 12:41:37 -0700 | [diff] [blame] | 1252 | static const char ACPI_PSS_BIOS_BUG_MSG[] = |
| 1253 | KERN_ERR FW_BUG PFX "No compatible ACPI _PSS objects found.\n" |
Joe Perches | ad361c9 | 2009-07-06 13:05:40 -0700 | [diff] [blame] | 1254 | FW_BUG PFX "Try again with latest BIOS.\n"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | struct powernow_k8_data *data; |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 1256 | struct init_on_cpu init_on_cpu; |
Andi Kleen | d7fa706 | 2006-04-07 19:49:48 +0200 | [diff] [blame] | 1257 | int rc; |
Mark Langsdorf | a2fed57 | 2010-03-18 18:41:46 +0100 | [diff] [blame] | 1258 | struct cpuinfo_x86 *c = &cpu_data(pol->cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | |
Jacob Shin | 8aae828 | 2005-11-21 07:23:08 -0800 | [diff] [blame] | 1260 | if (!cpu_online(pol->cpu)) |
| 1261 | return -ENODEV; |
| 1262 | |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 1263 | smp_call_function_single(pol->cpu, check_supported_cpu, &rc, 1); |
| 1264 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | return -ENODEV; |
| 1266 | |
Dave Jones | bfdc708 | 2005-10-20 15:16:15 -0700 | [diff] [blame] | 1267 | data = kzalloc(sizeof(struct powernow_k8_data), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | if (!data) { |
| 1269 | printk(KERN_ERR PFX "unable to alloc powernow_k8_data"); |
| 1270 | return -ENOMEM; |
| 1271 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | |
| 1273 | data->cpu = pol->cpu; |
Andreas Herrmann | a266d9f | 2008-11-21 14:49:25 +0100 | [diff] [blame] | 1274 | data->currpstate = HW_PSTATE_INVALID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | |
Rusty Russell | a0abd52 | 2009-02-16 17:31:58 -0600 | [diff] [blame] | 1276 | if (powernow_k8_cpu_init_acpi(data)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | /* |
Lucas De Marchi | 0d2eb44 | 2011-03-17 16:24:16 -0300 | [diff] [blame] | 1278 | * Use the PSB BIOS structure. This is only available on |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | * an UP version, and is deprecated by AMD. |
| 1280 | */ |
Randy Dunlap | 9ed059e | 2006-06-20 22:32:56 -0700 | [diff] [blame] | 1281 | if (num_online_cpus() != 1) { |
Thomas Renninger | df18297 | 2009-04-22 13:48:32 +0200 | [diff] [blame] | 1282 | printk_once(ACPI_PSS_BIOS_BUG_MSG); |
Dave Jones | 0cb8bc2 | 2009-02-18 14:11:00 -0500 | [diff] [blame] | 1283 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | } |
| 1285 | if (pol->cpu != 0) { |
Thomas Renninger | 2fd4709 | 2008-09-01 14:27:03 +0200 | [diff] [blame] | 1286 | printk(KERN_ERR FW_BUG PFX "No ACPI _PSS objects for " |
| 1287 | "CPU other than CPU0. Complain to your BIOS " |
| 1288 | "vendor.\n"); |
Dave Jones | 0cb8bc2 | 2009-02-18 14:11:00 -0500 | [diff] [blame] | 1289 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | } |
| 1291 | rc = find_psb_table(data); |
Dave Jones | 0cb8bc2 | 2009-02-18 14:11:00 -0500 | [diff] [blame] | 1292 | if (rc) |
| 1293 | goto err_out; |
| 1294 | |
Mark Langsdorf | 732553e | 2009-02-03 17:46:43 +0100 | [diff] [blame] | 1295 | /* Take a crude guess here. |
| 1296 | * That guess was in microseconds, so multiply with 1000 */ |
| 1297 | pol->cpuinfo.transition_latency = ( |
| 1298 | ((data->rvo + 8) * data->vstable * VST_UNITS_20US) + |
| 1299 | ((1 << data->irt) * 30)) * 1000; |
| 1300 | } else /* ACPI _PSS objects available */ |
| 1301 | pol->cpuinfo.transition_latency = get_transition_latency(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | |
| 1303 | /* only run on specific CPU from here on */ |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 1304 | init_on_cpu.data = data; |
| 1305 | smp_call_function_single(data->cpu, powernowk8_cpu_init_on_cpu, |
| 1306 | &init_on_cpu, 1); |
| 1307 | rc = init_on_cpu.rc; |
| 1308 | if (rc != 0) |
| 1309 | goto err_out_exit_acpi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | |
Linus Torvalds | f607e3a | 2008-08-19 13:34:59 -0700 | [diff] [blame] | 1311 | if (cpu_family == CPU_HW_PSTATE) |
Rusty Russell | 835481d | 2009-01-04 05:18:06 -0800 | [diff] [blame] | 1312 | cpumask_copy(pol->cpus, cpumask_of(pol->cpu)); |
Linus Torvalds | f607e3a | 2008-08-19 13:34:59 -0700 | [diff] [blame] | 1313 | else |
Rusty Russell | 7ad728f | 2009-03-13 14:49:50 +1030 | [diff] [blame] | 1314 | cpumask_copy(pol->cpus, cpu_core_mask(pol->cpu)); |
Rusty Russell | 835481d | 2009-01-04 05:18:06 -0800 | [diff] [blame] | 1315 | data->available_cores = pol->cpus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | |
Langsdorf, Mark | e7bdd7a | 2006-06-08 10:30:17 -0500 | [diff] [blame] | 1317 | if (cpu_family == CPU_HW_PSTATE) |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1318 | pol->cur = find_khz_freq_from_pstate(data->powernow_table, |
| 1319 | data->currpstate); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1320 | else |
| 1321 | pol->cur = find_khz_freq_from_fid(data->currfid); |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 1322 | pr_debug("policy current frequency %d kHz\n", pol->cur); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | |
| 1324 | /* min/max the cpu is capable of */ |
| 1325 | if (cpufreq_frequency_table_cpuinfo(pol, data->powernow_table)) { |
Thomas Renninger | 2fd4709 | 2008-09-01 14:27:03 +0200 | [diff] [blame] | 1326 | printk(KERN_ERR FW_BUG PFX "invalid powernow_table\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | powernow_k8_cpu_exit_acpi(data); |
| 1328 | kfree(data->powernow_table); |
| 1329 | kfree(data); |
| 1330 | return -EINVAL; |
| 1331 | } |
| 1332 | |
Mark Langsdorf | a2fed57 | 2010-03-18 18:41:46 +0100 | [diff] [blame] | 1333 | /* Check for APERF/MPERF support in hardware */ |
| 1334 | if (cpu_has(c, X86_FEATURE_APERFMPERF)) |
| 1335 | cpufreq_amd64_driver.getavg = cpufreq_get_measured_perf; |
| 1336 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | cpufreq_frequency_table_get_attr(data->powernow_table, pol->cpu); |
| 1338 | |
Langsdorf, Mark | e7bdd7a | 2006-06-08 10:30:17 -0500 | [diff] [blame] | 1339 | if (cpu_family == CPU_HW_PSTATE) |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 1340 | pr_debug("cpu_init done, current pstate 0x%x\n", |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1341 | data->currpstate); |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1342 | else |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 1343 | pr_debug("cpu_init done, current fid 0x%x, vid 0x%x\n", |
Dave Jones | 1f729e0 | 2006-06-04 19:37:58 -0400 | [diff] [blame] | 1344 | data->currfid, data->currvid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | |
travis@sgi.com | 2c6b8c0 | 2008-01-30 13:33:11 +0100 | [diff] [blame] | 1346 | per_cpu(powernow_data, pol->cpu) = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | |
| 1348 | return 0; |
| 1349 | |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 1350 | err_out_exit_acpi: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | powernow_k8_cpu_exit_acpi(data); |
| 1352 | |
Dave Jones | 0cb8bc2 | 2009-02-18 14:11:00 -0500 | [diff] [blame] | 1353 | err_out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | kfree(data); |
| 1355 | return -ENODEV; |
| 1356 | } |
| 1357 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1358 | static int __devexit powernowk8_cpu_exit(struct cpufreq_policy *pol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | { |
travis@sgi.com | 2c6b8c0 | 2008-01-30 13:33:11 +0100 | [diff] [blame] | 1360 | struct powernow_k8_data *data = per_cpu(powernow_data, pol->cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | |
| 1362 | if (!data) |
| 1363 | return -EINVAL; |
| 1364 | |
| 1365 | powernow_k8_cpu_exit_acpi(data); |
| 1366 | |
| 1367 | cpufreq_frequency_table_put_attr(pol->cpu); |
| 1368 | |
| 1369 | kfree(data->powernow_table); |
| 1370 | kfree(data); |
Thomas Renninger | 557a701 | 2009-12-14 11:44:15 +0100 | [diff] [blame] | 1371 | per_cpu(powernow_data, pol->cpu) = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | |
| 1373 | return 0; |
| 1374 | } |
| 1375 | |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 1376 | static void query_values_on_cpu(void *_err) |
| 1377 | { |
| 1378 | int *err = _err; |
Tejun Heo | 0a3aee0 | 2010-12-18 16:28:55 +0100 | [diff] [blame] | 1379 | struct powernow_k8_data *data = __this_cpu_read(powernow_data); |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 1380 | |
| 1381 | *err = query_current_values_with_pending_wait(data); |
| 1382 | } |
| 1383 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1384 | static unsigned int powernowk8_get(unsigned int cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | { |
Naga Chumbalkar | e15bc45 | 2009-06-11 15:26:54 +0000 | [diff] [blame] | 1386 | struct powernow_k8_data *data = per_cpu(powernow_data, cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | unsigned int khz = 0; |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 1388 | int err; |
shin, jacob | eef5167 | 2006-03-27 09:57:20 -0600 | [diff] [blame] | 1389 | |
| 1390 | if (!data) |
Thomas Renninger | 557a701 | 2009-12-14 11:44:15 +0100 | [diff] [blame] | 1391 | return 0; |
shin, jacob | eef5167 | 2006-03-27 09:57:20 -0600 | [diff] [blame] | 1392 | |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 1393 | smp_call_function_single(cpu, query_values_on_cpu, &err, true); |
| 1394 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | goto out; |
| 1396 | |
Joachim Deguara | 58389a8 | 2007-01-30 16:53:54 +0100 | [diff] [blame] | 1397 | if (cpu_family == CPU_HW_PSTATE) |
Mike Travis | fc0e474 | 2008-04-04 18:11:05 -0700 | [diff] [blame] | 1398 | khz = find_khz_freq_from_pstate(data->powernow_table, |
| 1399 | data->currpstate); |
Joachim Deguara | 58389a8 | 2007-01-30 16:53:54 +0100 | [diff] [blame] | 1400 | else |
| 1401 | khz = find_khz_freq_from_fid(data->currfid); |
| 1402 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | |
Dave Jones | b9111b7 | 2005-09-23 11:10:42 -0700 | [diff] [blame] | 1404 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | return khz; |
| 1406 | } |
| 1407 | |
Borislav Petkov | 73860c6 | 2010-03-31 21:56:42 +0200 | [diff] [blame] | 1408 | static void _cpb_toggle_msrs(bool t) |
| 1409 | { |
| 1410 | int cpu; |
| 1411 | |
| 1412 | get_online_cpus(); |
| 1413 | |
| 1414 | rdmsr_on_cpus(cpu_online_mask, MSR_K7_HWCR, msrs); |
| 1415 | |
| 1416 | for_each_cpu(cpu, cpu_online_mask) { |
| 1417 | struct msr *reg = per_cpu_ptr(msrs, cpu); |
| 1418 | if (t) |
| 1419 | reg->l &= ~BIT(25); |
| 1420 | else |
| 1421 | reg->l |= BIT(25); |
| 1422 | } |
| 1423 | wrmsr_on_cpus(cpu_online_mask, MSR_K7_HWCR, msrs); |
| 1424 | |
| 1425 | put_online_cpus(); |
| 1426 | } |
| 1427 | |
| 1428 | /* |
| 1429 | * Switch on/off core performance boosting. |
| 1430 | * |
| 1431 | * 0=disable |
| 1432 | * 1=enable. |
| 1433 | */ |
| 1434 | static void cpb_toggle(bool t) |
| 1435 | { |
| 1436 | if (!cpb_capable) |
| 1437 | return; |
| 1438 | |
| 1439 | if (t && !cpb_enabled) { |
| 1440 | cpb_enabled = true; |
| 1441 | _cpb_toggle_msrs(t); |
| 1442 | printk(KERN_INFO PFX "Core Boosting enabled.\n"); |
| 1443 | } else if (!t && cpb_enabled) { |
| 1444 | cpb_enabled = false; |
| 1445 | _cpb_toggle_msrs(t); |
| 1446 | printk(KERN_INFO PFX "Core Boosting disabled.\n"); |
| 1447 | } |
| 1448 | } |
| 1449 | |
| 1450 | static ssize_t store_cpb(struct cpufreq_policy *policy, const char *buf, |
| 1451 | size_t count) |
| 1452 | { |
| 1453 | int ret = -EINVAL; |
| 1454 | unsigned long val = 0; |
| 1455 | |
| 1456 | ret = strict_strtoul(buf, 10, &val); |
| 1457 | if (!ret && (val == 0 || val == 1) && cpb_capable) |
| 1458 | cpb_toggle(val); |
| 1459 | else |
| 1460 | return -EINVAL; |
| 1461 | |
| 1462 | return count; |
| 1463 | } |
| 1464 | |
| 1465 | static ssize_t show_cpb(struct cpufreq_policy *policy, char *buf) |
| 1466 | { |
| 1467 | return sprintf(buf, "%u\n", cpb_enabled); |
| 1468 | } |
| 1469 | |
| 1470 | #define define_one_rw(_name) \ |
| 1471 | static struct freq_attr _name = \ |
| 1472 | __ATTR(_name, 0644, show_##_name, store_##_name) |
| 1473 | |
| 1474 | define_one_rw(cpb); |
| 1475 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1476 | static struct freq_attr *powernow_k8_attr[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | &cpufreq_freq_attr_scaling_available_freqs, |
Borislav Petkov | 73860c6 | 2010-03-31 21:56:42 +0200 | [diff] [blame] | 1478 | &cpb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | NULL, |
| 1480 | }; |
| 1481 | |
Linus Torvalds | 221dee2 | 2007-02-26 14:55:48 -0800 | [diff] [blame] | 1482 | static struct cpufreq_driver cpufreq_amd64_driver = { |
Thomas Renninger | e2f74f3 | 2009-11-19 12:31:01 +0100 | [diff] [blame] | 1483 | .verify = powernowk8_verify, |
| 1484 | .target = powernowk8_target, |
| 1485 | .bios_limit = acpi_processor_get_bios_limit, |
| 1486 | .init = powernowk8_cpu_init, |
| 1487 | .exit = __devexit_p(powernowk8_cpu_exit), |
| 1488 | .get = powernowk8_get, |
| 1489 | .name = "powernow-k8", |
| 1490 | .owner = THIS_MODULE, |
| 1491 | .attr = powernow_k8_attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | }; |
| 1493 | |
Borislav Petkov | 73860c6 | 2010-03-31 21:56:42 +0200 | [diff] [blame] | 1494 | /* |
| 1495 | * Clear the boost-disable flag on the CPU_DOWN path so that this cpu |
| 1496 | * cannot block the remaining ones from boosting. On the CPU_UP path we |
| 1497 | * simply keep the boost-disable flag in sync with the current global |
| 1498 | * state. |
| 1499 | */ |
Borislav Petkov | fe501f1 | 2010-05-25 15:28:58 +0000 | [diff] [blame] | 1500 | static int cpb_notify(struct notifier_block *nb, unsigned long action, |
| 1501 | void *hcpu) |
Borislav Petkov | 73860c6 | 2010-03-31 21:56:42 +0200 | [diff] [blame] | 1502 | { |
| 1503 | unsigned cpu = (long)hcpu; |
| 1504 | u32 lo, hi; |
| 1505 | |
| 1506 | switch (action) { |
| 1507 | case CPU_UP_PREPARE: |
| 1508 | case CPU_UP_PREPARE_FROZEN: |
| 1509 | |
| 1510 | if (!cpb_enabled) { |
| 1511 | rdmsr_on_cpu(cpu, MSR_K7_HWCR, &lo, &hi); |
| 1512 | lo |= BIT(25); |
| 1513 | wrmsr_on_cpu(cpu, MSR_K7_HWCR, lo, hi); |
| 1514 | } |
| 1515 | break; |
| 1516 | |
| 1517 | case CPU_DOWN_PREPARE: |
| 1518 | case CPU_DOWN_PREPARE_FROZEN: |
| 1519 | rdmsr_on_cpu(cpu, MSR_K7_HWCR, &lo, &hi); |
| 1520 | lo &= ~BIT(25); |
| 1521 | wrmsr_on_cpu(cpu, MSR_K7_HWCR, lo, hi); |
| 1522 | break; |
| 1523 | |
| 1524 | default: |
| 1525 | break; |
| 1526 | } |
| 1527 | |
| 1528 | return NOTIFY_OK; |
| 1529 | } |
| 1530 | |
Borislav Petkov | fe501f1 | 2010-05-25 15:28:58 +0000 | [diff] [blame] | 1531 | static struct notifier_block cpb_nb = { |
Borislav Petkov | 73860c6 | 2010-03-31 21:56:42 +0200 | [diff] [blame] | 1532 | .notifier_call = cpb_notify, |
| 1533 | }; |
| 1534 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | /* driver entry point for init */ |
Andi Kleen | aa41eb9 | 2006-01-16 01:56:36 +0100 | [diff] [blame] | 1536 | static int __cpuinit powernowk8_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | { |
Borislav Petkov | 73860c6 | 2010-03-31 21:56:42 +0200 | [diff] [blame] | 1538 | unsigned int i, supported_cpus = 0, cpu; |
Neil Brown | ac81831 | 2010-11-24 11:28:01 +1100 | [diff] [blame] | 1539 | int rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | |
Andrew Morton | a720115 | 2006-03-24 03:15:07 -0800 | [diff] [blame] | 1541 | for_each_online_cpu(i) { |
Rusty Russell | 1ff6e97 | 2009-06-12 20:55:37 +0930 | [diff] [blame] | 1542 | int rc; |
| 1543 | smp_call_function_single(i, check_supported_cpu, &rc, 1); |
| 1544 | if (rc == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | supported_cpus++; |
| 1546 | } |
| 1547 | |
Borislav Petkov | 73860c6 | 2010-03-31 21:56:42 +0200 | [diff] [blame] | 1548 | if (supported_cpus != num_online_cpus()) |
| 1549 | return -ENODEV; |
| 1550 | |
| 1551 | printk(KERN_INFO PFX "Found %d %s (%d cpu cores) (" VERSION ")\n", |
| 1552 | num_online_nodes(), boot_cpu_data.x86_model_id, supported_cpus); |
| 1553 | |
| 1554 | if (boot_cpu_has(X86_FEATURE_CPB)) { |
| 1555 | |
| 1556 | cpb_capable = true; |
| 1557 | |
Borislav Petkov | 73860c6 | 2010-03-31 21:56:42 +0200 | [diff] [blame] | 1558 | msrs = msrs_alloc(); |
| 1559 | if (!msrs) { |
| 1560 | printk(KERN_ERR "%s: Error allocating msrs!\n", __func__); |
| 1561 | return -ENOMEM; |
| 1562 | } |
| 1563 | |
Dave Jones | a536b12 | 2010-11-23 21:29:31 -0500 | [diff] [blame] | 1564 | register_cpu_notifier(&cpb_nb); |
| 1565 | |
Borislav Petkov | 73860c6 | 2010-03-31 21:56:42 +0200 | [diff] [blame] | 1566 | rdmsr_on_cpus(cpu_online_mask, MSR_K7_HWCR, msrs); |
| 1567 | |
| 1568 | for_each_cpu(cpu, cpu_online_mask) { |
| 1569 | struct msr *reg = per_cpu_ptr(msrs, cpu); |
| 1570 | cpb_enabled |= !(!!(reg->l & BIT(25))); |
| 1571 | } |
| 1572 | |
| 1573 | printk(KERN_INFO PFX "Core Performance Boosting: %s.\n", |
| 1574 | (cpb_enabled ? "on" : "off")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | } |
| 1576 | |
Neil Brown | ac81831 | 2010-11-24 11:28:01 +1100 | [diff] [blame] | 1577 | rv = cpufreq_register_driver(&cpufreq_amd64_driver); |
| 1578 | if (rv < 0 && boot_cpu_has(X86_FEATURE_CPB)) { |
| 1579 | unregister_cpu_notifier(&cpb_nb); |
| 1580 | msrs_free(msrs); |
| 1581 | msrs = NULL; |
| 1582 | } |
| 1583 | return rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | } |
| 1585 | |
| 1586 | /* driver entry point for term */ |
| 1587 | static void __exit powernowk8_exit(void) |
| 1588 | { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 1589 | pr_debug("exit\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | |
Borislav Petkov | 73860c6 | 2010-03-31 21:56:42 +0200 | [diff] [blame] | 1591 | if (boot_cpu_has(X86_FEATURE_CPB)) { |
| 1592 | msrs_free(msrs); |
| 1593 | msrs = NULL; |
| 1594 | |
| 1595 | unregister_cpu_notifier(&cpb_nb); |
| 1596 | } |
| 1597 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | cpufreq_unregister_driver(&cpufreq_amd64_driver); |
| 1599 | } |
| 1600 | |
Dave Jones | 0e64a0c | 2009-02-04 14:37:50 -0500 | [diff] [blame] | 1601 | MODULE_AUTHOR("Paul Devriendt <paul.devriendt@amd.com> and " |
| 1602 | "Mark Langsdorf <mark.langsdorf@amd.com>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | MODULE_DESCRIPTION("AMD Athlon 64 and Opteron processor frequency driver."); |
| 1604 | MODULE_LICENSE("GPL"); |
| 1605 | |
| 1606 | late_initcall(powernowk8_init); |
| 1607 | module_exit(powernowk8_exit); |