2 This should be done by Eric
3 2004.12 yhlu add multi ht chain dynamically support
6 #include <device/pci_def.h>
7 #include <device/pci_ids.h>
8 #include <device/hypertransport_def.h>
10 static unsigned ht_lookup_slave_capability(device_t dev)
15 hdr_type = pci_read_config8(dev, PCI_HEADER_TYPE);
19 if ((hdr_type == PCI_HEADER_TYPE_NORMAL) ||
20 (hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
21 pos = PCI_CAPABILITY_LIST;
23 if (pos > PCI_CAP_LIST_NEXT) {
24 pos = pci_read_config8(dev, pos);
26 while(pos != 0) { /* loop through the linked list */
28 cap = pci_read_config8(dev, pos + PCI_CAP_LIST_ID);
29 if (cap == PCI_CAP_ID_HT) {
32 flags = pci_read_config16(dev, pos + PCI_CAP_FLAGS);
33 if ((flags >> 13) == 0) {
34 /* Entry is a Slave secondary, success... */
38 pos = pci_read_config8(dev, pos + PCI_CAP_LIST_NEXT);
43 static void ht_collapse_previous_enumeration(unsigned bus)
48 /* Check if is already collapsed */
49 dev = PCI_DEV(bus, 0, 0);
50 id = pci_read_config32(dev, PCI_VENDOR_ID);
51 if ( ! ( (id == 0xffffffff) || (id == 0x00000000) ||
52 (id == 0x0000ffff) || (id == 0xffff0000) ) ) {
56 /* Spin through the devices and collapse any previous
57 * hypertransport enumeration.
59 for(dev = PCI_DEV(bus, 1, 0); dev <= PCI_DEV(bus, 0x1f, 0x7); dev += PCI_DEV(0, 1, 0)) {
63 id = pci_read_config32(dev, PCI_VENDOR_ID);
64 if ((id == 0xffffffff) || (id == 0x00000000) ||
65 (id == 0x0000ffff) || (id == 0xffff0000)) {
69 pos = ht_lookup_slave_capability(dev);
74 /* Clear the unitid */
75 flags = pci_read_config16(dev, pos + PCI_CAP_FLAGS);
77 pci_write_config16(dev, pos + PCI_CAP_FLAGS, flags);
81 static unsigned ht_read_freq_cap(device_t dev, unsigned pos)
83 /* Handle bugs in valid hypertransport frequency reporting */
87 freq_cap = pci_read_config16(dev, pos);
88 freq_cap &= ~(1 << HT_FREQ_VENDOR); /* Ignore Vendor HT frequencies */
90 id = pci_read_config32(dev, 0);
92 /* AMD 8131 Errata 48 */
93 if (id == (PCI_VENDOR_ID_AMD | (PCI_DEVICE_ID_AMD_8131_PCIX << 16))) {
94 freq_cap &= ~(1 << HT_FREQ_800Mhz);
96 /* AMD 8151 Errata 23 */
97 if (id == (PCI_VENDOR_ID_AMD | (PCI_DEVICE_ID_AMD_8151_SYSCTRL << 16))) {
98 freq_cap &= ~(1 << HT_FREQ_800Mhz);
100 /* AMD K8 Unsupported 1Ghz? */
101 if (id == (PCI_VENDOR_ID_AMD | (0x1100 << 16))) {
102 freq_cap &= ~(1 << HT_FREQ_1000Mhz);
107 #define LINK_OFFS(WIDTH,FREQ,FREQ_CAP) \
108 (((WIDTH & 0xff) << 16) | ((FREQ & 0xff) << 8) | (FREQ_CAP & 0xFF))
110 #define LINK_WIDTH(OFFS) ((OFFS >> 16) & 0xFF)
111 #define LINK_FREQ(OFFS) ((OFFS >> 8) & 0xFF)
112 #define LINK_FREQ_CAP(OFFS) ((OFFS) & 0xFF)
114 #define PCI_HT_HOST_OFFS LINK_OFFS( \
115 PCI_HT_CAP_HOST_WIDTH, \
116 PCI_HT_CAP_HOST_FREQ, \
117 PCI_HT_CAP_HOST_FREQ_CAP)
119 #define PCI_HT_SLAVE0_OFFS LINK_OFFS( \
120 PCI_HT_CAP_SLAVE_WIDTH0, \
121 PCI_HT_CAP_SLAVE_FREQ0, \
122 PCI_HT_CAP_SLAVE_FREQ_CAP0)
124 #define PCI_HT_SLAVE1_OFFS LINK_OFFS( \
125 PCI_HT_CAP_SLAVE_WIDTH1, \
126 PCI_HT_CAP_SLAVE_FREQ1, \
127 PCI_HT_CAP_SLAVE_FREQ_CAP1)
129 static int ht_optimize_link(
130 device_t dev1, uint8_t pos1, unsigned offs1,
131 device_t dev2, uint8_t pos2, unsigned offs2)
133 static const uint8_t link_width_to_pow2[]= { 3, 4, 0, 5, 1, 2, 0, 0 };
134 static const uint8_t pow2_to_link_width[] = { 0x7, 4, 5, 0, 1, 3 };
135 uint16_t freq_cap1, freq_cap2, freq_cap, freq_mask;
136 uint8_t width_cap1, width_cap2, width_cap, width, old_width, ln_width1, ln_width2;
137 uint8_t freq, old_freq;
139 /* Set link width and frequency */
141 /* Initially assume everything is already optimized and I don't need a reset */
144 /* Get the frequency capabilities */
145 freq_cap1 = ht_read_freq_cap(dev1, pos1 + LINK_FREQ_CAP(offs1));
146 freq_cap2 = ht_read_freq_cap(dev2, pos2 + LINK_FREQ_CAP(offs2));
148 /* Calculate the highest possible frequency */
149 freq = log2(freq_cap1 & freq_cap2);
151 /* See if I am changing the link freqency */
152 old_freq = pci_read_config8(dev1, pos1 + LINK_FREQ(offs1));
153 needs_reset |= old_freq != freq;
154 old_freq = pci_read_config8(dev2, pos2 + LINK_FREQ(offs2));
155 needs_reset |= old_freq != freq;
157 /* Set the Calulcated link frequency */
158 pci_write_config8(dev1, pos1 + LINK_FREQ(offs1), freq);
159 pci_write_config8(dev2, pos2 + LINK_FREQ(offs2), freq);
161 /* Get the width capabilities */
162 width_cap1 = pci_read_config8(dev1, pos1 + LINK_WIDTH(offs1));
163 width_cap2 = pci_read_config8(dev2, pos2 + LINK_WIDTH(offs2));
165 /* Calculate dev1's input width */
166 ln_width1 = link_width_to_pow2[width_cap1 & 7];
167 ln_width2 = link_width_to_pow2[(width_cap2 >> 4) & 7];
168 if (ln_width1 > ln_width2) {
169 ln_width1 = ln_width2;
171 width = pow2_to_link_width[ln_width1];
172 /* Calculate dev1's output width */
173 ln_width1 = link_width_to_pow2[(width_cap1 >> 4) & 7];
174 ln_width2 = link_width_to_pow2[width_cap2 & 7];
175 if (ln_width1 > ln_width2) {
176 ln_width1 = ln_width2;
178 width |= pow2_to_link_width[ln_width1] << 4;
180 /* See if I am changing dev1's width */
181 old_width = pci_read_config8(dev1, pos1 + LINK_WIDTH(offs1) + 1);
182 needs_reset |= old_width != width;
184 /* Set dev1's widths */
185 pci_write_config8(dev1, pos1 + LINK_WIDTH(offs1) + 1, width);
187 /* Calculate dev2's width */
188 width = ((width & 0x70) >> 4) | ((width & 0x7) << 4);
190 /* See if I am changing dev2's width */
191 old_width = pci_read_config8(dev2, pos2 + LINK_WIDTH(offs2) + 1);
192 needs_reset |= old_width != width;
194 /* Set dev2's widths */
195 pci_write_config8(dev2, pos2 + LINK_WIDTH(offs2) + 1, width);
200 static int ht_setup_chain(device_t udev, unsigned upos)
202 /* Assumption the HT chain that is bus 0 has the HT I/O Hub on it.
203 * On most boards this just happens. If a cpu has multiple
204 * non Coherent links the appropriate bus registers for the
205 * links needs to be programed to point at bus 0.
207 unsigned next_unitid, last_unitid;
211 /* Make certain the HT bus is not enumerated */
212 ht_collapse_previous_enumeration(0);
215 uoffs = PCI_HT_HOST_OFFS;
220 unsigned flags, count;
221 device_t dev = PCI_DEV(0, 0, 0);
222 last_unitid = next_unitid;
224 id = pci_read_config32(dev, PCI_VENDOR_ID);
225 /* If the chain is enumerated quit */
226 if (((id & 0xffff) == 0x0000) || ((id & 0xffff) == 0xffff) ||
227 (((id >> 16) & 0xffff) == 0xffff) ||
228 (((id >> 16) & 0xffff) == 0x0000)) {
232 pos = ht_lookup_slave_capability(dev);
234 print_err("HT link capability not found\r\n");
238 /* Setup the Hypertransport link */
239 reset_needed |= ht_optimize_link(udev, upos, uoffs, dev, pos, PCI_HT_SLAVE0_OFFS);
241 /* Update the Unitid of the current device */
242 flags = pci_read_config16(dev, pos + PCI_CAP_FLAGS);
243 flags &= ~0x1f; /* mask out the bse Unit ID */
244 flags |= next_unitid & 0x1f;
245 pci_write_config16(dev, pos + PCI_CAP_FLAGS, flags);
247 /* Remeber the location of the last device */
248 udev = PCI_DEV(0, next_unitid, 0);
250 uoffs = PCI_HT_SLAVE1_OFFS;
252 /* Compute the number of unitids consumed */
253 count = (flags >> 5) & 0x1f;
254 next_unitid += count;
256 } while((last_unitid != next_unitid) && (next_unitid <= 0x1f));
260 static int ht_setup_chainx(device_t udev, unsigned upos, unsigned bus)
262 unsigned next_unitid, last_unitid;
266 uoffs = PCI_HT_HOST_OFFS;
272 unsigned flags, count;
274 device_t dev = PCI_DEV(bus, 0, 0);
275 last_unitid = next_unitid;
277 id = pci_read_config32(dev, PCI_VENDOR_ID);
278 /* If the chain is enumerated quit */
279 if (((id & 0xffff) == 0x0000) || ((id & 0xffff) == 0xffff) ||
280 (((id >> 16) & 0xffff) == 0xffff) ||
281 (((id >> 16) & 0xffff) == 0x0000)) {
285 pos = ht_lookup_slave_capability(dev);
287 print_err("HT link capability not found\r\n");
291 /* Setup the Hypertransport link */
292 reset_needed |= ht_optimize_link(udev, upos, uoffs, dev, pos, PCI_HT_SLAVE0_OFFS);
294 /* Update the Unitid of the current device */
295 flags = pci_read_config16(dev, pos + PCI_CAP_FLAGS);
296 flags &= ~0x1f; /* mask out the bse Unit ID */
297 flags |= next_unitid & 0x1f;
298 pci_write_config16(dev, pos + PCI_CAP_FLAGS, flags);
300 /* Remeber the location of the last device */
301 udev = PCI_DEV(0, next_unitid, 0);
303 uoffs = PCI_HT_SLAVE1_OFFS;
305 /* Compute the number of unitids consumed */
306 count = (flags >> 5) & 0x1f;
307 next_unitid += count;
309 } while((last_unitid != next_unitid) && (next_unitid <= 0x1f));
313 static int ht_setup_chains(int ht_c_num)
315 /* Assumption the HT chain that is bus 0 has the HT I/O Hub on it.
316 * On most boards this just happens. If a cpu has multiple
317 * non Coherent links the appropriate bus registers for the
318 * links needs to be programed to point at bus 0.
327 for (i = 0; i < ht_c_num; i++) {
334 reg = pci_read_config32(PCI_DEV(0,0x18,1), 0xe0 + i * 4);
336 //We need setup 0x94, 0xb4, and 0xd4 according to the reg
337 devpos = ((reg & 0xf0)>>4)+0x18; // nodeid; it will decide 0x18 or 0x19
338 regpos = ((reg & 0xf00)>>8) * 0x20 + 0x94; // link n; it will decide 0x94 or 0xb4, 0x0xd4;
339 busn = (reg & 0xff0000)>>16;
341 dword = pci_read_config32( PCI_DEV(0, devpos, 0), regpos) ;
342 dword &= ~(0xffff<<8);
343 dword |= (reg & 0xffff0000)>>8;
344 pci_write_config32( PCI_DEV(0, devpos,0), regpos , dword);
347 dump_pci_devices_on_bus(busn);
350 /* Make certain the HT bus is not enumerated */
351 ht_collapse_previous_enumeration(busn);
353 upos = ((reg & 0xf00)>>8) * 0x20 + 0x80;
354 udev = PCI_DEV(0, devpos, 0);
357 dump_pci_devices_on_bus(busn);
360 reset_needed |= ht_setup_chainx(udev,upos,busn );
367 static int ht_setup_chains_x(void)
376 // read PCI_DEV(0,0x18,0) 0x64 bit [8:9] to find out SbLink m
377 reg = pci_read_config32(PCI_DEV(0, 0x18, 0), 0x64);
378 //update PCI_DEV(0, 0x18, 1) 0xe0 to 0x05000m03, and next_busn=5+1;
379 tempreg = 3 | ( 0<<4) | (((reg>>8) & 3)<<8) | (0<<16)| (5<<24);
380 pci_write_config32(PCI_DEV(0, 0x18, 1), 0xe0, tempreg);
381 next_busn=5+1; // 0 will be used ht chain with SB we need to keep SB in bus0 in auto stage
383 for(ht_c_num=1;ht_c_num<4; ht_c_num++) {
384 pci_write_config32(PCI_DEV(0, 0x18, 1), 0xe0 + ht_c_num * 4, 0);
387 nodes = ((pci_read_config32(PCI_DEV(0, 0x18, 0), 0x60)>>4) & 7) + 1;
389 for(nodeid=0; nodeid<nodes; nodeid++) {
392 dev = PCI_DEV(0, 0x18+nodeid,0);
393 for(linkn = 0; linkn<3; linkn++) {
395 regpos = 0x98 + 0x20 * linkn;
396 reg = pci_read_config32(dev, regpos);
397 if ((reg & 7) != 7) continue; // it is not non conherent or not connected
398 tempreg = 3 | (nodeid <<4) | (linkn<<8);
399 //compare (temp & 0xffff), with (PCI(0, 0x18, 1) 0xe0 to 0xec & 0xfffff)
400 for(ht_c_num=0;ht_c_num<4; ht_c_num++) {
401 reg = pci_read_config32(PCI_DEV(0, 0x18, 1), 0xe0 + ht_c_num * 4);
402 if(((reg & 0xffff) == (tempreg & 0xffff)) || ((reg & 0xffff) == 0x0000)) { // we got it
406 if(ht_c_num == 4) break; //used up onle 4 non conherent allowed
408 if((reg & 0xf) == 3) continue; //SBLink so don't touch it
409 tempreg |= (next_busn<<16)|((next_busn+5)<<24);
410 pci_write_config32(PCI_DEV(0, 0x18, 1), 0xe0 + ht_c_num * 4, tempreg);
414 //update 0xe0, 0xe4, 0xe8, 0xec from PCI_DEV(0, 0x18,1) to PCI_DEV(0, 0x19,1) to PCI_DEV(0, 0x1f,1);
416 for(nodeid = 1; nodeid<nodes; nodeid++) {
419 dev = PCI_DEV(0, 0x18+nodeid,1);
420 for(i = 0; i< 4; i++) {
422 regpos = 0xe0 + i * 4;
423 reg = pci_read_config32(PCI_DEV(0, 0x18, 1), regpos);
424 pci_write_config32(dev, regpos, reg);
431 for(ht_c_num=0;ht_c_num<4; ht_c_num++) {
432 reg = pci_read_config32(PCI_DEV(0, 0x18, 1), 0xe0 + ht_c_num * 4);
433 if(((reg & 0xf) != 0x0)) {
438 return ht_setup_chains(i);