1 | /*␊ |
2 | * spd.c - serial presence detect memory information␊ |
3 | * (restored from pcefi10.5)␊ |
4 | */␊ |
5 | ␊ |
6 | #include "libsaio.h"␊ |
7 | #include "pci.h"␊ |
8 | #include "platform.h"␊ |
9 | #include "spd.h"␊ |
10 | #include "saio_internal.h"␊ |
11 | #include "bootstruct.h"␊ |
12 | #include "memvendors.h"␊ |
13 | ␊ |
14 | #ifndef DEBUG_SPD␊ |
15 | #define DEBUG_SPD 0␊ |
16 | #endif␊ |
17 | ␊ |
18 | #if DEBUG_SPD␊ |
19 | #define DBG(x...)␉printf(x)␊ |
20 | #else␊ |
21 | #define DBG(x...)␊ |
22 | #endif␊ |
23 | ␊ |
24 | static const char *spd_memory_types[] =␊ |
25 | {␊ |
26 | ␉"RAM", /* 00h Undefined */␊ |
27 | ␉"FPM", /* 01h FPM */␊ |
28 | ␉"EDO", /* 02h EDO */␊ |
29 | ␉"",␉␉␉␉/* 03h PIPELINE NIBBLE */␊ |
30 | ␉"SDRAM", /* 04h SDRAM */␊ |
31 | ␉"",␉␉␉␉/* 05h MULTIPLEXED ROM */␊ |
32 | ␉"DDR SGRAM",␉/* 06h SGRAM DDR */␊ |
33 | ␉"DDR SDRAM",␉/* 07h SDRAM DDR */␊ |
34 | ␉"DDR2 SDRAM", /* 08h SDRAM DDR 2 */␊ |
35 | ␉"",␉␉␉␉/* 09h Undefined */␊ |
36 | ␉"",␉␉␉␉/* 0Ah Undefined */␊ |
37 | ␉"DDR3 SDRAM" /* 0Bh SDRAM DDR 3 */␊ |
38 | };␊ |
39 | ␊ |
40 | #define UNKNOWN_MEM_TYPE 2␊ |
41 | static uint8_t spd_mem_to_smbios[] =␊ |
42 | {␊ |
43 | ␉UNKNOWN_MEM_TYPE, /* 00h Undefined */␊ |
44 | ␉UNKNOWN_MEM_TYPE, /* 01h FPM */␊ |
45 | ␉UNKNOWN_MEM_TYPE, /* 02h EDO */␊ |
46 | ␉UNKNOWN_MEM_TYPE,␉ /* 03h PIPELINE NIBBLE */␊ |
47 | ␉SMB_MEM_TYPE_SDRAM, /* 04h SDRAM */␊ |
48 | ␉SMB_MEM_TYPE_ROM,␉ /* 05h MULTIPLEXED ROM */␊ |
49 | ␉SMB_MEM_TYPE_SGRAM, /* 06h SGRAM DDR */␊ |
50 | ␉SMB_MEM_TYPE_DDR, /* 07h SDRAM DDR */␊ |
51 | ␉SMB_MEM_TYPE_DDR2, /* 08h SDRAM DDR 2 */␊ |
52 | ␉UNKNOWN_MEM_TYPE, ␉ /* 09h Undefined */␊ |
53 | ␉UNKNOWN_MEM_TYPE,␉ /* 0Ah Undefined */␊ |
54 | ␉SMB_MEM_TYPE_DDR3 /* 0Bh SDRAM DDR 3 */␊ |
55 | };␊ |
56 | #define SPD_TO_SMBIOS_SIZE (sizeof(spd_mem_to_smbios)/sizeof(uint8_t))␊ |
57 | ␊ |
58 | #define rdtsc(low,high) \␊ |
59 | __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))␊ |
60 | ␊ |
61 | #define SMBHSTSTS 0␊ |
62 | #define SMBHSTCNT 2␊ |
63 | #define SMBHSTCMD 3␊ |
64 | #define SMBHSTADD 4␊ |
65 | #define SMBHSTDAT 5␊ |
66 | ␊ |
67 | /** Get Vendor Name from spd, 2 cases handled DDR3 and DDR2, have different formats.*/␊ |
68 | const char * getVendorName(RamSlotInfo_t* slot)␊ |
69 | {␊ |
70 | uint8_t bank = 0;␊ |
71 | uint8_t code = 0;␊ |
72 | int i = 0;␊ |
73 | const char * spd = slot->spd;␊ |
74 | ␊ |
75 | if (spd[2]==0x0b) { // DDR3␊ |
76 | bank = spd[0x75];␊ |
77 | code = spd[0x76];␊ |
78 | for (i=0; i < VEN_MAP_SIZE; i++)␊ |
79 | if (bank==vendorMap[i].bank && code==vendorMap[i].code)␊ |
80 | return vendorMap[i].name;␊ |
81 | }␊ |
82 | else if (spd[2]==0x08 || spd[2]==0x07) { // DDR2 or DDR␊ |
83 | if(spd[0x40]==0x7f) {␊ |
84 | for (i=0x40; i<0x48 && spd[i]==0x7f;i++) bank++;␊ |
85 | code = spd[i];␊ |
86 | } else {␊ |
87 | code = spd[0x40]; ␊ |
88 | bank = 0;␊ |
89 | }␊ |
90 | for (i=0; i < VEN_MAP_SIZE; i++)␊ |
91 | if (bank==vendorMap[i].bank && code==vendorMap[i].code)␊ |
92 | return vendorMap[i].name;␊ |
93 | }␊ |
94 | /* OK there is no vendor id here lets try to match the partnum if it exists */␊ |
95 | if (strstr(slot->Vendor,"GU332") == slot->Vendor) // Unifosa fingerprint␊ |
96 | return "Unifosa";␊ |
97 | return "NoName";␊ |
98 | }␊ |
99 | ␊ |
100 | /** Get Default Memory Module Speed (no overclocking handled) */␊ |
101 | int getDDRspeedMhz(const char * spd)␊ |
102 | {␊ |
103 | if (spd[2]==0x0b) { // DDR3␊ |
104 | switch(spd[12]) {␊ |
105 | case 0x0f:␊ |
106 | return 1066;␊ |
107 | case 0x0c:␊ |
108 | return 1333;␊ |
109 | case 0x0a:␊ |
110 | return 1600;␊ |
111 | case 0x14:␊ |
112 | default:␊ |
113 | return 800;␊ |
114 | }␊ |
115 | } ␊ |
116 | else if (spd[2]==0x08) { // DDR2␊ |
117 | switch(spd[9]) {␊ |
118 | case 0x50:␊ |
119 | return 400;␊ |
120 | case 0x3d:␊ |
121 | return 533;␊ |
122 | case 0x30:␊ |
123 | return 667;␊ |
124 | case 0x25:␊ |
125 | default:␊ |
126 | return 800;␊ |
127 | }␊ |
128 | }␊ |
129 | return 800; // default freq for unknown types␊ |
130 | }␊ |
131 | ␊ |
132 | #define UIS(a) ((uint32_t)spd[a])␊ |
133 | ␊ |
134 | /** Get DDR3 or DDR2 serial number, 0 most of the times */␊ |
135 | uint32_t getDDRSerial(const char* spd)␊ |
136 | {␊ |
137 | uint32_t ret=0;␊ |
138 | ␊ |
139 | if (spd[2]==0x0b) // DDR3␊ |
140 | // assume it is lsb to msb␊ |
141 | ret = UIS(122) | (UIS(123)<<8) | (UIS(124)<<16) | (UIS(125)<<24);␊ |
142 | else if (spd[2]==0x08 || spd[2]==0x07) // DDR2 or DDR␊ |
143 | ret = UIS(95) | (UIS(96)<<8) | (UIS(97)<<16) | (UIS(98)<<24);␊ |
144 | return ret;␊ |
145 | }␊ |
146 | ␊ |
147 | /** Get DDR3 or DDR2 Part Number */␊ |
148 | const char * getDDRPartNum(const char* spd)␊ |
149 | {␊ |
150 | if (spd[2]==0x0b) // DDR3␊ |
151 | return &spd[128];␊ |
152 | else if (spd[2]==0x08 || spd[2]==0x07) // DDR2 or DDR␊ |
153 | return &spd[73];␊ |
154 | return "N/A";␊ |
155 | }␊ |
156 | ␊ |
157 | /** Read one byte from the intel i2c, used for reading SPD on intel chipsets only. */␊ |
158 | unsigned char smb_read_byte_intel(uint32_t base, uint8_t adr, uint8_t cmd)␊ |
159 | {␊ |
160 | ␉int l1, h1, l2, h2;␊ |
161 | unsigned long long t;␊ |
162 | ␉␊ |
163 | outb(base + SMBHSTSTS, 0x1f);␉␉␉␉␉// reset SMBus Controller␊ |
164 | outb(base + SMBHSTDAT, 0xff);␊ |
165 | ␉␊ |
166 | while( inb(base + SMBHSTSTS) & 0x01);␉␉␉// wait until ready␊ |
167 | ␉␊ |
168 | outb(base + SMBHSTCMD, cmd);␊ |
169 | outb(base + SMBHSTADD, (adr << 1) | 0x01 );␊ |
170 | outb(base + SMBHSTCNT, 0x48 );␊ |
171 | ␉␊ |
172 | rdtsc(l1, h1);␊ |
173 | ␉␊ |
174 | ␉while (!( inb(base + SMBHSTSTS) & 0x02))␉␉// wait til command finished␊ |
175 | ␉{␉␊ |
176 | ␉␉rdtsc(l2, h2);␊ |
177 | ␉␉t = ((h2 - h1) * 0xffffffff + (l2 - l1)) / (Platform.CPU.TSCFrequency / 40);␊ |
178 | ␉␉if (t > 10)␊ |
179 | ␉␉␉break;␉␉␉␉␉␉␉␉␉// break after 10ms␊ |
180 | }␊ |
181 | return inb(base + SMBHSTDAT);␊ |
182 | }␊ |
183 | ␊ |
184 | int mapping []= {0,2,1,3,4,6,5,7,8,10,9,11};␊ |
185 | ␊ |
186 | /** Read from smbus the SPD content and interpret it for detecting memory attributes */␊ |
187 | static void read_smb_intel(pci_dt_t *smbus_dev)␊ |
188 | { ␊ |
189 | static int serialnum=0;␊ |
190 | int i, x, ser, speed;␊ |
191 | uint8_t spd_size, spd_type;␊ |
192 | uint32_t base;␊ |
193 | bool dump = false;␊ |
194 | RamSlotInfo_t* slot;␊ |
195 | ␊ |
196 | base = pci_config_read16(smbus_dev->dev.addr, 0x20) & 0xFFFE;␊ |
197 | DBG("Scanning smbus_dev <%04x, %04x> ...\n",smbus_dev->vendor_id, smbus_dev->device_id);␊ |
198 | ␊ |
199 | getBoolForKey("DumpSPD", &dump, &bootInfo->bootConfig);␊ |
200 | bool fullBanks = // needed at least for laptops␊ |
201 | Platform.DMI.MemoryModules == Platform.DMI.MaxMemorySlots;␊ |
202 | // Search MAX_RAM_SLOTS slots␊ |
203 | for (i = 0; i < MAX_RAM_SLOTS; i++){␊ |
204 | slot = &Platform.RAM.DIMM[i];␊ |
205 | spd_size = smb_read_byte_intel(base, 0x50 + i, 0);␊ |
206 | ␊ |
207 | // Check spd is present␊ |
208 | if (spd_size && spd_size != 0xff) {␊ |
209 | slot->InUse = true;␊ |
210 | ␊ |
211 | slot->spd = malloc(spd_size);␊ |
212 | if (slot->spd) {␊ |
213 | bzero(slot->spd, spd_size);␊ |
214 | ␊ |
215 | // Copy spd data into buffer␊ |
216 | for (x = 0; x < spd_size; x++)␊ |
217 | slot->spd[x] = smb_read_byte_intel(base, 0x50 + i, x);␊ |
218 | ␊ |
219 | switch (slot->spd[SPD_MEMORY_TYPE]) {␊ |
220 | case SPD_MEMORY_TYPE_SDRAM_DDR2:␊ |
221 | ␊ |
222 | slot->ModuleSize = ((1 << (slot->spd[SPD_NUM_ROWS] & 0x0f) + (slot->spd[SPD_NUM_COLUMNS] & 0x0f) - 17) * ␊ |
223 | ((slot->spd[SPD_NUM_DIMM_BANKS] & 0x7) + 1) * slot->spd[SPD_NUM_BANKS_PER_SDRAM]);␊ |
224 | break;␊ |
225 | ␊ |
226 | case SPD_MEMORY_TYPE_SDRAM_DDR3:␊ |
227 | ␊ |
228 | slot->ModuleSize = ((slot->spd[4] & 0x0f) + 28 ) + ((slot->spd[8] & 0x7) + 3 );␊ |
229 | slot->ModuleSize -= (slot->spd[7] & 0x7) + 25;␊ |
230 | slot->ModuleSize = ((1 << slot->ModuleSize) * (((slot->spd[7] >> 3) & 0x1f) + 1));␊ |
231 | ␊ |
232 | break;␊ |
233 | }␊ |
234 | }␊ |
235 | ␊ |
236 | spd_type = (slot->spd[SPD_MEMORY_TYPE] < ((char) 12) ? slot->spd[SPD_MEMORY_TYPE] : 0);␊ |
237 | slot->Type = spd_mem_to_smbios[spd_type];␊ |
238 | strncpy(slot->PartNo, getDDRPartNum(slot->spd), 64);␊ |
239 | strncpy(slot->Vendor, getVendorName(slot), 64);␊ |
240 | ␊ |
241 | ser = getDDRSerial(slot->spd);␊ |
242 | if (ser==0) {␊ |
243 | sprintf(slot->SerialNo, "10000000%d", serialnum);␊ |
244 | serialnum++;␊ |
245 | }␊ |
246 | else␊ |
247 | sprintf(slot->SerialNo, "%d", ser);␊ |
248 | // determine spd speed␊ |
249 | speed = getDDRspeedMhz(slot->spd);␊ |
250 | if (speed > slot->Frequency) slot->Frequency = speed; // just in case dmi wins on spd␊ |
251 | if(dump) {␊ |
252 | printf("Slot %d Type %d %dMB (%s) %dMHz Vendor=%s, PartNo=%s SerialNo=%s\n", ␊ |
253 | i, ␊ |
254 | (int)slot->Type,␊ |
255 | slot->ModuleSize, ␊ |
256 | spd_memory_types[spd_type],␊ |
257 | slot->Frequency,␊ |
258 | slot->Vendor,␊ |
259 | slot->PartNo,␊ |
260 | slot->SerialNo); ␊ |
261 | dumpPhysAddr("spd content: ",slot->spd, spd_size);␊ |
262 | getc();␊ |
263 | }␊ |
264 | }␊ |
265 | // laptops sometimes show slot 0 and 2 with slot 1 empty when only 2 slots are presents so:␊ |
266 | Platform.DMI.DIMM[i]= ␊ |
267 | i>0 && Platform.RAM.DIMM[1].InUse==false && fullBanks && Platform.DMI.MaxMemorySlots==2 ? ␊ |
268 | mapping[i] : i; // for laptops case, mapping setup would need to be more generic than this␊ |
269 | }␊ |
270 | }␊ |
271 | ␊ |
272 | static struct smbus_controllers_t smbus_controllers[] = {␊ |
273 | ␊ |
274 | ␉{0x8086, 0x269B, "ESB2", read_smb_intel },␊ |
275 | ␉{0x8086, 0x25A4, "6300ESB", read_smb_intel },␊ |
276 | ␉{0x8086, 0x24C3, "ICH4", read_smb_intel },␊ |
277 | ␉{0x8086, 0x24D3, "ICH5", read_smb_intel },␊ |
278 | ␉{0x8086, 0x266A, "ICH6", read_smb_intel },␊ |
279 | ␉{0x8086, 0x27DA, "ICH7", read_smb_intel },␊ |
280 | ␉{0x8086, 0x283E, "ICH8", read_smb_intel },␊ |
281 | ␉{0x8086, 0x2930, "ICH9", read_smb_intel },␉␊ |
282 | ␉{0x8086, 0x3A30, "ICH10R", read_smb_intel },␊ |
283 | ␉{0x8086, 0x3A60, "ICH10B", read_smb_intel },␊ |
284 | ␉{0x8086, 0x3B30, "P55", read_smb_intel },␊ |
285 | ␉{0x8086, 0x5032, "EP80579", read_smb_intel }␊ |
286 | ␊ |
287 | };␊ |
288 | ␊ |
289 | void scan_smbus_controller(pci_dt_t *smbus_dev)␊ |
290 | {␊ |
291 | ␉int␉i;␊ |
292 | ␊ |
293 | ␉for( i = 1; i < sizeof(smbus_controllers) / sizeof(smbus_controllers[0]); i++ )␊ |
294 | ␉␉if (( smbus_controllers[i].vendor == smbus_dev->vendor_id) ␊ |
295 | ␉␉␉&& ( smbus_controllers[i].device == smbus_dev->device_id))␊ |
296 | ␉␉{␊ |
297 | ␉␉␉verbose("%s%s SMBus Controller [%4x:%4x] at %02x:%02x.%x\n", ␊ |
298 | ␉␉␉␉ (smbus_dev->vendor_id == 0x8086) ? "Intel(R) " : "",␊ |
299 | ␉␉␉␉ smbus_controllers[i].name,␊ |
300 | ␉␉␉␉ smbus_dev->vendor_id, smbus_dev->device_id,␊ |
301 | ␉␉␉␉ smbus_dev->dev.bits.bus, smbus_dev->dev.bits.dev, smbus_dev->dev.bits.func);␊ |
302 | ␉␉␉␊ |
303 | ␉␉␉smbus_controllers[i].read_smb(smbus_dev);␊ |
304 | ␉␉␉␊ |
305 | ␉␉}␊ |
306 | ␉␊ |
307 | }␊ |
308 | ␊ |
309 | // initial call : pci_dt = root_pci_dev;␊ |
310 | // find_and_read_smbus_controller(root_pci_dev);␊ |
311 | bool find_and_read_smbus_controller(pci_dt_t* pci_dt)␊ |
312 | {␊ |
313 | pci_dt_t␉*current = pci_dt;␊ |
314 | int i;␊ |
315 | ␊ |
316 | while (current) {␊ |
317 | #if DEBUG_SPD␊ |
318 | printf("%02x:%02x.%x [%04x] [%04x:%04x] :: %s\n", ␊ |
319 | current->dev.bits.bus, current->dev.bits.dev, current->dev.bits.func, ␊ |
320 | current->class_id, current->vendor_id, current->device_id, ␊ |
321 | get_pci_dev_path(current));␊ |
322 | #endif␊ |
323 | ␉for ( i = 0; i < sizeof(smbus_controllers) / sizeof(smbus_controllers[0]); i++ )␊ |
324 | {␊ |
325 | if (current->vendor_id == smbus_controllers[i].vendor &&␊ |
326 | current->device_id == smbus_controllers[i].device)␊ |
327 | {␊ |
328 | smbus_controllers[i].read_smb(current); // read smb␊ |
329 | return true;␊ |
330 | } ␊ |
331 | }␊ |
332 | find_and_read_smbus_controller(current->children);␊ |
333 | current = current->next;␊ |
334 | }␊ |
335 | return false; // not found␊ |
336 | }␊ |
337 | ␊ |
338 | void scan_spd(PlatformInfo_t *p)␊ |
339 | {␊ |
340 | find_and_read_smbus_controller(root_pci_dev);␊ |
341 | }␊ |
342 | |