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, ␊ |
68 | have different formats, always return a valid ptr.*/␊ |
69 | const char * getVendorName(RamSlotInfo_t* slot)␊ |
70 | {␊ |
71 | uint8_t bank = 0;␊ |
72 | uint8_t code = 0;␊ |
73 | int i = 0;␊ |
74 | const char * spd = slot->spd;␊ |
75 | ␊ |
76 | if (spd[2]==0x0b) { // DDR3␊ |
77 | bank = spd[0x75];␊ |
78 | code = spd[0x76];␊ |
79 | for (i=0; i < VEN_MAP_SIZE; i++)␊ |
80 | if (bank==vendorMap[i].bank && code==vendorMap[i].code)␊ |
81 | return vendorMap[i].name;␊ |
82 | }␊ |
83 | else if (spd[2]==0x08 || spd[2]==0x07) { // DDR2 or DDR␊ |
84 | if(spd[0x40]==0x7f) {␊ |
85 | for (i=0x40; i<0x48 && spd[i]==0x7f;i++) bank++;␊ |
86 | code = spd[i];␊ |
87 | } else {␊ |
88 | code = spd[0x40]; ␊ |
89 | bank = 0;␊ |
90 | }␊ |
91 | for (i=0; i < VEN_MAP_SIZE; i++)␊ |
92 | if (bank==vendorMap[i].bank && code==vendorMap[i].code)␊ |
93 | return vendorMap[i].name;␊ |
94 | }␊ |
95 | /* OK there is no vendor id here lets try to match the partnum if it exists */␊ |
96 | if (strstr(slot->PartNo,"GU332") == slot->PartNo) // Unifosa fingerprint␊ |
97 | return "Unifosa";␊ |
98 | return "NoName";␊ |
99 | }␊ |
100 | ␊ |
101 | /** Get Default Memory Module Speed (no overclocking handled) */␊ |
102 | int getDDRspeedMhz(const char * spd)␊ |
103 | {␊ |
104 | if (spd[2]==0x0b) { // DDR3␊ |
105 | switch(spd[12]) {␊ |
106 | case 0x0f:␊ |
107 | return 1066;␊ |
108 | case 0x0c:␊ |
109 | return 1333;␊ |
110 | case 0x0a:␊ |
111 | return 1600;␊ |
112 | case 0x14:␊ |
113 | default:␊ |
114 | return 800;␊ |
115 | }␊ |
116 | } ␊ |
117 | else if (spd[2]==0x08) { // DDR2␊ |
118 | switch(spd[9]) {␊ |
119 | case 0x50:␊ |
120 | return 400;␊ |
121 | case 0x3d:␊ |
122 | return 533;␊ |
123 | case 0x30:␊ |
124 | return 667;␊ |
125 | case 0x25:␊ |
126 | default:␊ |
127 | return 800;␊ |
128 | }␊ |
129 | }␊ |
130 | return 800; // default freq for unknown types␊ |
131 | }␊ |
132 | ␊ |
133 | #define UIS(a) ((uint32_t)spd[a])␊ |
134 | ␊ |
135 | /** Get DDR3 or DDR2 serial number, 0 most of the times, always return a valid ptr */␊ |
136 | const char *getDDRSerial(const char* spd)␊ |
137 | {␊ |
138 | static char asciiSerial[16];␊ |
139 | static uint8_t serialnum=0;␊ |
140 | uint32_t ret=0,i;␊ |
141 | ␊ |
142 | if (spd[2]==0x0b) {// DDR3␊ |
143 | if ( isascii(spd[122]) && isascii(spd[123]) && ␊ |
144 | isascii(spd[124]) && isascii(spd[125]) ) {␊ |
145 | for(i=0; i<4; i++) asciiSerial[i] = spd[122+i];␊ |
146 | asciiSerial[4] = 0;␊ |
147 | return asciiSerial;␊ |
148 | }␊ |
149 | else // assume it is lsb to msb␊ |
150 | ret = UIS(122) | (UIS(123)<<8) | (UIS(124)<<16) | ((UIS(125)&0x7f)<<24);␊ |
151 | }␊ |
152 | else if (spd[2]==0x08 || spd[2]==0x07) { // DDR2 or DDR␊ |
153 | if ( isascii(spd[95]) && isascii(spd[96]) && ␊ |
154 | isascii(spd[97]) && isascii(spd[98]) ) {␊ |
155 | for (i=0; i<4; i++) asciiSerial[i] = spd[95+i];␊ |
156 | asciiSerial[4] = 0;␊ |
157 | return asciiSerial;␊ |
158 | }␊ |
159 | else␊ |
160 | ret = UIS(95) | (UIS(96)<<8) | (UIS(97)<<16) | ((UIS(98)&0x7f)<<24);␊ |
161 | }␊ |
162 | ␊ |
163 | if (!ret) sprintf(asciiSerial, "10000000%d", serialnum++); ␊ |
164 | else sprintf(asciiSerial, "%d", ret); ␊ |
165 | ␊ |
166 | return asciiSerial;␊ |
167 | }␊ |
168 | ␊ |
169 | /** Get DDR3 or DDR2 Part Number, always return a valid ptr */␊ |
170 | const char * getDDRPartNum(const char* spd)␊ |
171 | {␊ |
172 | const char * sPart = NULL;␊ |
173 | int i;␊ |
174 | bool bZero = false;␊ |
175 | ␊ |
176 | if (spd[2]==0x0b) // DDR3␊ |
177 | sPart = &spd[128];␊ |
178 | else if (spd[2]==0x08 || spd[2]==0x07) // DDR2 or DDR␊ |
179 | sPart = &spd[73];␊ |
180 | if (sPart) { // Check that the spd part name is zero terminated and that it is ascii:␊ |
181 | for (i=0; i<32; i++) {␊ |
182 | if (sPart[i]==0) {␊ |
183 | bZero = true;␊ |
184 | break;␊ |
185 | }␊ |
186 | else if ( !isascii(sPart[i]) ) {␊ |
187 | sPart = NULL;␊ |
188 | break;␊ |
189 | }␊ |
190 | }␊ |
191 | }␊ |
192 | return ( sPart==NULL || !(*sPart) || !bZero ) ? ␊ |
193 | "N/A" : sPart;␊ |
194 | }␊ |
195 | ␊ |
196 | /** Read one byte from the intel i2c, used for reading SPD on intel chipsets only. */␊ |
197 | unsigned char smb_read_byte_intel(uint32_t base, uint8_t adr, uint8_t cmd)␊ |
198 | {␊ |
199 | int l1, h1, l2, h2;␊ |
200 | unsigned long long t;␊ |
201 | ␉␊ |
202 | outb(base + SMBHSTSTS, 0x1f);␉␉␉␉␉// reset SMBus Controller␊ |
203 | outb(base + SMBHSTDAT, 0xff);␊ |
204 | ␉␊ |
205 | while( inb(base + SMBHSTSTS) & 0x01);␉␉␉// wait until ready␊ |
206 | ␉␊ |
207 | outb(base + SMBHSTCMD, cmd);␊ |
208 | outb(base + SMBHSTADD, (adr << 1) | 0x01 );␊ |
209 | outb(base + SMBHSTCNT, 0x48 );␊ |
210 | ␉␊ |
211 | rdtsc(l1, h1);␊ |
212 | ␉␊ |
213 | ␉while (!( inb(base + SMBHSTSTS) & 0x02))␉␉// wait til command finished␊ |
214 | ␉{␉␊ |
215 | ␉␉rdtsc(l2, h2);␊ |
216 | ␉␉t = ((h2 - h1) * 0xffffffff + (l2 - l1)) / (Platform.CPU.TSCFrequency / 40);␊ |
217 | ␉␉if (t > 10)␊ |
218 | ␉␉␉break;␉␉␉␉␉␉␉␉␉// break after 10ms␊ |
219 | }␊ |
220 | return inb(base + SMBHSTDAT);␊ |
221 | }␊ |
222 | ␊ |
223 | int mapping []= {0,2,1,3,4,6,5,7,8,10,9,11};␊ |
224 | ␊ |
225 | /** Read from smbus the SPD content and interpret it for detecting memory attributes */␊ |
226 | static void read_smb_intel(pci_dt_t *smbus_dev)␊ |
227 | { ␊ |
228 | int i, x, speed;␊ |
229 | uint8_t spd_size, spd_type;␊ |
230 | uint32_t base;␊ |
231 | bool dump = false;␊ |
232 | RamSlotInfo_t* slot;␊ |
233 | ␊ |
234 | base = pci_config_read16(smbus_dev->dev.addr, 0x20) & 0xFFFE;␊ |
235 | DBG("Scanning smbus_dev <%04x, %04x> ...\n",smbus_dev->vendor_id, smbus_dev->device_id);␊ |
236 | ␊ |
237 | getBoolForKey("DumpSPD", &dump, &bootInfo->bootConfig);␊ |
238 | bool fullBanks = // needed at least for laptops␊ |
239 | Platform.DMI.MemoryModules == Platform.DMI.MaxMemorySlots;␊ |
240 | // Search MAX_RAM_SLOTS slots␊ |
241 | for (i = 0; i < MAX_RAM_SLOTS; i++){␊ |
242 | slot = &Platform.RAM.DIMM[i];␊ |
243 | spd_size = smb_read_byte_intel(base, 0x50 + i, 0);␊ |
244 | ␊ |
245 | // Check spd is present␊ |
246 | if (spd_size && (spd_size != 0xff) ) {␊ |
247 | slot->spd = malloc(spd_size);␊ |
248 | if (slot->spd == NULL) continue;␊ |
249 | ␊ |
250 | slot->InUse = true;␊ |
251 | ␊ |
252 | bzero(slot->spd, spd_size);␊ |
253 | ␊ |
254 | // Copy spd data into buffer␊ |
255 | for (x = 0; x < spd_size; x++)␊ |
256 | slot->spd[x] = smb_read_byte_intel(base, 0x50 + i, x);␊ |
257 | ␊ |
258 | switch (slot->spd[SPD_MEMORY_TYPE]) {␊ |
259 | case SPD_MEMORY_TYPE_SDRAM_DDR2:␊ |
260 | ␊ |
261 | slot->ModuleSize = ((1 << (slot->spd[SPD_NUM_ROWS] & 0x0f) + (slot->spd[SPD_NUM_COLUMNS] & 0x0f) - 17) * ␊ |
262 | ((slot->spd[SPD_NUM_DIMM_BANKS] & 0x7) + 1) * slot->spd[SPD_NUM_BANKS_PER_SDRAM]);␊ |
263 | break;␊ |
264 | ␊ |
265 | case SPD_MEMORY_TYPE_SDRAM_DDR3:␊ |
266 | ␊ |
267 | slot->ModuleSize = ((slot->spd[4] & 0x0f) + 28 ) + ((slot->spd[8] & 0x7) + 3 );␊ |
268 | slot->ModuleSize -= (slot->spd[7] & 0x7) + 25;␊ |
269 | slot->ModuleSize = ((1 << slot->ModuleSize) * (((slot->spd[7] >> 3) & 0x1f) + 1));␊ |
270 | ␊ |
271 | break;␊ |
272 | }␊ |
273 | ␊ |
274 | spd_type = (slot->spd[SPD_MEMORY_TYPE] < ((char) 12) ? slot->spd[SPD_MEMORY_TYPE] : 0);␊ |
275 | slot->Type = spd_mem_to_smbios[spd_type];␊ |
276 | slot->PartNo = strdup(getDDRPartNum(slot->spd) );␊ |
277 | slot->Vendor = strdup(getVendorName(slot) );␊ |
278 | slot->SerialNo = strdup(getDDRSerial(slot->spd));␊ |
279 | ␊ |
280 | // determine spd speed␊ |
281 | speed = getDDRspeedMhz(slot->spd);␊ |
282 | if (speed > slot->Frequency) slot->Frequency = speed; // just in case dmi wins on spd␊ |
283 | if(dump) {␊ |
284 | printf("Slot %d Type %d %dMB (%s) %dMHz Vendor=%s, PartNo=%s SerialNo=%s\n", ␊ |
285 | i, ␊ |
286 | (int)slot->Type,␊ |
287 | slot->ModuleSize, ␊ |
288 | spd_memory_types[spd_type],␊ |
289 | slot->Frequency,␊ |
290 | slot->Vendor,␊ |
291 | slot->PartNo,␊ |
292 | slot->SerialNo); ␊ |
293 | dumpPhysAddr("spd content: ",slot->spd, spd_size);␊ |
294 | getc();␊ |
295 | }␊ |
296 | }␊ |
297 | ␊ |
298 | // laptops sometimes show slot 0 and 2 with slot 1 empty when only 2 slots are presents so:␊ |
299 | Platform.DMI.DIMM[i]= ␊ |
300 | i>0 && Platform.RAM.DIMM[1].InUse==false && fullBanks && Platform.DMI.MaxMemorySlots==2 ? ␊ |
301 | mapping[i] : i; // for laptops case, mapping setup would need to be more generic than this␊ |
302 | ␊ |
303 | if (slot->spd) {␊ |
304 | free(slot->spd);␊ |
305 | slot->spd = NULL;␊ |
306 | }␊ |
307 | ␊ |
308 | } // for␊ |
309 | }␊ |
310 | ␊ |
311 | static struct smbus_controllers_t smbus_controllers[] = {␊ |
312 | ␊ |
313 | ␉{0x8086, 0x269B, "ESB2", read_smb_intel },␊ |
314 | ␉{0x8086, 0x25A4, "6300ESB", read_smb_intel },␊ |
315 | ␉{0x8086, 0x24C3, "ICH4", read_smb_intel },␊ |
316 | ␉{0x8086, 0x24D3, "ICH5", read_smb_intel },␊ |
317 | ␉{0x8086, 0x266A, "ICH6", read_smb_intel },␊ |
318 | ␉{0x8086, 0x27DA, "ICH7", read_smb_intel },␊ |
319 | ␉{0x8086, 0x283E, "ICH8", read_smb_intel },␊ |
320 | ␉{0x8086, 0x2930, "ICH9", read_smb_intel },␉␊ |
321 | ␉{0x8086, 0x3A30, "ICH10R", read_smb_intel },␊ |
322 | ␉{0x8086, 0x3A60, "ICH10B", read_smb_intel },␊ |
323 | ␉{0x8086, 0x3B30, "P55", read_smb_intel },␊ |
324 | ␉{0x8086, 0x5032, "EP80579", read_smb_intel }␊ |
325 | ␊ |
326 | };␊ |
327 | ␊ |
328 | // initial call : pci_dt = root_pci_dev;␊ |
329 | // find_and_read_smbus_controller(root_pci_dev);␊ |
330 | bool find_and_read_smbus_controller(pci_dt_t* pci_dt)␊ |
331 | {␊ |
332 | pci_dt_t␉*current = pci_dt;␊ |
333 | int i;␊ |
334 | ␊ |
335 | while (current) {␊ |
336 | #if DEBUG_SPD␊ |
337 | printf("%02x:%02x.%x [%04x] [%04x:%04x] :: %s\n", ␊ |
338 | current->dev.bits.bus, current->dev.bits.dev, current->dev.bits.func, ␊ |
339 | current->class_id, current->vendor_id, current->device_id, ␊ |
340 | get_pci_dev_path(current));␊ |
341 | #endif␊ |
342 | ␉for ( i = 0; i < sizeof(smbus_controllers) / sizeof(smbus_controllers[0]); i++ )␊ |
343 | {␊ |
344 | if (current->vendor_id == smbus_controllers[i].vendor &&␊ |
345 | current->device_id == smbus_controllers[i].device)␊ |
346 | {␊ |
347 | smbus_controllers[i].read_smb(current); // read smb␊ |
348 | return true;␊ |
349 | } ␊ |
350 | }␊ |
351 | find_and_read_smbus_controller(current->children);␊ |
352 | current = current->next;␊ |
353 | }␊ |
354 | return false; // not found␊ |
355 | }␊ |
356 | ␊ |
357 | void scan_spd(PlatformInfo_t *p)␊ |
358 | {␊ |
359 | find_and_read_smbus_controller(root_pci_dev);␊ |
360 | }␊ |
361 | |