X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=src%2Fdevices%2Fhypertransport.c;h=6d37ab5764880325d57f0a40337dd8376eee5df8;hb=085cb4b4ca9a51e42f0665850e2cc9879bfbfa76;hp=326f343662aa5ba0ccc6f8dad113c09cbefc79da;hpb=83b991afff40e12a8b6756af06a472842edb1a66;p=coreboot.git diff --git a/src/devices/hypertransport.c b/src/devices/hypertransport.c index 326f34366..6d37ab576 100644 --- a/src/devices/hypertransport.c +++ b/src/devices/hypertransport.c @@ -1,40 +1,106 @@ +/* + 2005.11 yhlu add let the real sb to use small uintid + +*/ + + #include #include #include #include #include +#include #include -#include #include #include +#define OPT_HT_LINK 0 + +#if OPT_HT_LINK == 1 +#include +#endif + static device_t ht_scan_get_devs(device_t *old_devices) { device_t first, last; first = *old_devices; last = first; + /* Extract the chain of devices to (first through last) + * for the next hypertransport device. + */ while(last && last->sibling && - (last->sibling->path.u.pci.devfn > last->path.u.pci.devfn)) { + (last->sibling->path.type == DEVICE_PATH_PCI) && + (last->sibling->path.u.pci.devfn > last->path.u.pci.devfn)) + { last = last->sibling; } if (first) { + device_t child; + /* Unlink the chain from the list of old devices */ *old_devices = last->sibling; last->sibling = 0; + + /* Now add the device to the list of devices on the bus. + */ + /* Find the last child of our parent */ + for(child = first->bus->children; child && child->sibling; ) { + child = child->sibling; + } + /* Place the chain on the list of children of their parent. */ + if (child) { + child->sibling = first; + } else { + first->bus->children = first; + } } return first; } +#if OPT_HT_LINK == 1 +static unsigned ht_read_freq_cap(device_t dev, unsigned pos) +{ + /* Handle bugs in valid hypertransport frequency reporting */ + unsigned freq_cap; + + freq_cap = pci_read_config16(dev, pos); + freq_cap &= ~(1 << HT_FREQ_VENDOR); /* Ignore Vendor HT frequencies */ + + /* AMD 8131 Errata 48 */ + if ((dev->vendor == PCI_VENDOR_ID_AMD) && + (dev->device == PCI_DEVICE_ID_AMD_8131_PCIX)) { + freq_cap &= ~(1 << HT_FREQ_800Mhz); + } + /* AMD 8151 Errata 23 */ + if ((dev->vendor == PCI_VENDOR_ID_AMD) && + (dev->device == PCI_DEVICE_ID_AMD_8151_SYSCTRL)) { + freq_cap &= ~(1 << HT_FREQ_800Mhz); + } + /* AMD K8 Unsupported 1Ghz? */ + if ((dev->vendor == PCI_VENDOR_ID_AMD) && (dev->device == 0x1100)) { +#if K8_HT_FREQ_1G_SUPPORT == 1 + if (is_cpu_pre_e0()) { // only e0 later suupport 1GHz HT + freq_cap &= ~(1 << HT_FREQ_1000Mhz); + } +#else + freq_cap &= ~(1 << HT_FREQ_1000Mhz); +#endif + + } + return freq_cap; +} +#endif -struct prev_link { +struct ht_link { struct device *dev; unsigned pos; - unsigned char config_off, freq_off, freq_cap_off; + unsigned char ctrl_off, config_off, freq_off, freq_cap_off; }; -static int ht_setup_link(struct prev_link *prev, device_t dev, unsigned pos) +static int ht_setup_link(struct ht_link *prev, device_t dev, unsigned pos) { static const uint8_t link_width_to_pow2[]= { 3, 4, 0, 5, 1, 2, 0, 0 }; static const uint8_t pow2_to_link_width[] = { 0x7, 4, 5, 0, 1, 3 }; + struct ht_link cur[1]; unsigned present_width_cap, upstream_width_cap; unsigned present_freq_cap, upstream_freq_cap; unsigned ln_present_width_in, ln_upstream_width_in; @@ -42,23 +108,37 @@ static int ht_setup_link(struct prev_link *prev, device_t dev, unsigned pos) unsigned freq, old_freq; unsigned present_width, upstream_width, old_width; int reset_needed; + int linkb_to_host; /* Set the hypertransport link width and frequency */ reset_needed = 0; - + /* See which side of the device our previous write to + * set the unitid came from. + */ + cur->dev = dev; + cur->pos = pos; + linkb_to_host = (pci_read_config16(cur->dev, cur->pos + PCI_CAP_FLAGS) >> 10) & 1; + if (!linkb_to_host) { + cur->ctrl_off = PCI_HT_CAP_SLAVE_CTRL0; + cur->config_off = PCI_HT_CAP_SLAVE_WIDTH0; + cur->freq_off = PCI_HT_CAP_SLAVE_FREQ0; + cur->freq_cap_off = PCI_HT_CAP_SLAVE_FREQ_CAP0; + } + else { + cur->ctrl_off = PCI_HT_CAP_SLAVE_CTRL1; + cur->config_off = PCI_HT_CAP_SLAVE_WIDTH1; + cur->freq_off = PCI_HT_CAP_SLAVE_FREQ1; + cur->freq_cap_off = PCI_HT_CAP_SLAVE_FREQ_CAP1; + } +#if OPT_HT_LINK == 1 /* Read the capabilities */ - present_freq_cap = pci_read_config16(dev, pos + PCI_HT_CAP_SLAVE_FREQ_CAP0); - upstream_freq_cap = pci_read_config16(prev->dev, prev->pos + prev->freq_cap_off); - present_width_cap = pci_read_config8(dev, pos + PCI_HT_CAP_SLAVE_WIDTH0); + present_freq_cap = ht_read_freq_cap(cur->dev, cur->pos + cur->freq_cap_off); + upstream_freq_cap = ht_read_freq_cap(prev->dev, prev->pos + prev->freq_cap_off); + present_width_cap = pci_read_config8(cur->dev, cur->pos + cur->config_off); upstream_width_cap = pci_read_config8(prev->dev, prev->pos + prev->config_off); /* Calculate the highest useable frequency */ -#if 0 freq = log2(present_freq_cap & upstream_freq_cap); -#else - /* Errata for 8131 - freq 5 has hardware problems don't support it */ - freq = log2(present_freq_cap & upstream_freq_cap & 0x1f); -#endif /* Calculate the highest width */ ln_upstream_width_in = link_width_to_pow2[upstream_width_cap & 7]; @@ -78,40 +158,79 @@ static int ht_setup_link(struct prev_link *prev, device_t dev, unsigned pos) present_width |= pow2_to_link_width[ln_upstream_width_out]; /* Set the current device */ - old_freq = pci_read_config8(dev, pos + PCI_HT_CAP_SLAVE_FREQ0); + old_freq = pci_read_config8(cur->dev, cur->pos + cur->freq_off); + old_freq &= 0x0f; if (freq != old_freq) { - pci_write_config8(dev, pos + PCI_HT_CAP_SLAVE_FREQ0, freq); + unsigned new_freq; + pci_write_config8(cur->dev, cur->pos + cur->freq_off, freq); reset_needed = 1; printk_spew("HyperT FreqP old %x new %x\n",old_freq,freq); + new_freq = pci_read_config8(cur->dev, cur->pos + cur->freq_off); + new_freq &= 0x0f; + if (new_freq != freq) { + printk_err("%s Hypertransport frequency would not set wanted: %x got: %x\n", + dev_path(dev), freq, new_freq); + } } - old_width = pci_read_config8(dev, pos + PCI_HT_CAP_SLAVE_WIDTH0 + 1); + old_width = pci_read_config8(cur->dev, cur->pos + cur->config_off + 1); if (present_width != old_width) { - pci_write_config8(dev, pos + PCI_HT_CAP_SLAVE_WIDTH0 + 1, present_width); + unsigned new_width; + pci_write_config8(cur->dev, cur->pos + cur->config_off + 1, + present_width); reset_needed = 1; printk_spew("HyperT widthP old %x new %x\n",old_width, present_width); + new_width = pci_read_config8(cur->dev, cur->pos + cur->config_off + 1); + if (new_width != present_width) { + printk_err("%s Hypertransport width would not set wanted: %x got: %x\n", + dev_path(dev), present_width, new_width); + } } /* Set the upstream device */ old_freq = pci_read_config8(prev->dev, prev->pos + prev->freq_off); old_freq &= 0x0f; if (freq != old_freq) { + unsigned new_freq; pci_write_config8(prev->dev, prev->pos + prev->freq_off, freq); reset_needed = 1; printk_spew("HyperT freqU old %x new %x\n", old_freq, freq); + new_freq = pci_read_config8(prev->dev, prev->pos + prev->freq_off); + new_freq &= 0x0f; + if (new_freq != freq) { + printk_err("%s Hypertransport frequency would not set wanted: %x got: %x\n", + dev_path(prev->dev), freq, new_freq); + } } old_width = pci_read_config8(prev->dev, prev->pos + prev->config_off + 1); if (upstream_width != old_width) { + unsigned new_width; pci_write_config8(prev->dev, prev->pos + prev->config_off + 1, upstream_width); reset_needed = 1; printk_spew("HyperT widthU old %x new %x\n", old_width, upstream_width); + new_width = pci_read_config8(prev->dev, prev->pos + prev->config_off + 1); + if (new_width != upstream_width) { + printk_err("%s Hypertransport width would not set wanted: %x got: %x\n", + dev_path(prev->dev), upstream_width, new_width); + } } +#endif - /* Remember the current link as the previous link */ - prev->dev = dev; - prev->pos = pos; - prev->config_off = PCI_HT_CAP_SLAVE_WIDTH1; - prev->freq_off = PCI_HT_CAP_SLAVE_FREQ1; - prev->freq_cap_off = PCI_HT_CAP_SLAVE_FREQ_CAP1; + /* Remember the current link as the previous link, + * But look at the other offsets. + */ + prev->dev = cur->dev; + prev->pos = cur->pos; + if (cur->ctrl_off == PCI_HT_CAP_SLAVE_CTRL0) { + prev->ctrl_off = PCI_HT_CAP_SLAVE_CTRL1; + prev->config_off = PCI_HT_CAP_SLAVE_WIDTH1; + prev->freq_off = PCI_HT_CAP_SLAVE_FREQ1; + prev->freq_cap_off = PCI_HT_CAP_SLAVE_FREQ_CAP1; + } else { + prev->ctrl_off = PCI_HT_CAP_SLAVE_CTRL0; + prev->config_off = PCI_HT_CAP_SLAVE_WIDTH0; + prev->freq_off = PCI_HT_CAP_SLAVE_FREQ0; + prev->freq_cap_off = PCI_HT_CAP_SLAVE_FREQ_CAP0; + } return reset_needed; @@ -121,43 +240,86 @@ static unsigned ht_lookup_slave_capability(struct device *dev) { unsigned pos; pos = 0; - switch(dev->hdr_type & 0x7f) { - case PCI_HEADER_TYPE_NORMAL: - case PCI_HEADER_TYPE_BRIDGE: - pos = PCI_CAPABILITY_LIST; - break; - } - if (pos > PCI_CAP_LIST_NEXT) { - pos = pci_read_config8(dev, pos); - } - while(pos != 0) { /* loop through the linked list */ - uint8_t cap; - cap = pci_read_config8(dev, pos + PCI_CAP_LIST_ID); - printk_spew("Capability: 0x%02x @ 0x%02x\n", cap, pos); - if (cap == PCI_CAP_ID_HT) { + do { + pos = pci_find_next_capability(dev, PCI_CAP_ID_HT, pos); + if (pos) { unsigned flags; flags = pci_read_config16(dev, pos + PCI_CAP_FLAGS); - printk_spew("flags: 0x%04x\n", (unsigned)flags); + printk_spew("flags: 0x%04x\n", flags); if ((flags >> 13) == 0) { - /* Entry is a Slave secondary, success...*/ + /* Entry is a Slave secondary, success... */ break; } } - if(pos) { - pos = pci_read_config8(dev, pos + PCI_CAP_LIST_NEXT); - } - } + } while(pos); return pos; } -static void ht_collapse_early_enumeration(struct bus *bus) +static void ht_collapse_early_enumeration(struct bus *bus, unsigned offset_unitid) { unsigned int devfn; + struct ht_link prev; + unsigned ctrl; + + /* Initialize the hypertransport enumeration state */ + prev.dev = bus->dev; + prev.pos = bus->cap; + prev.ctrl_off = PCI_HT_CAP_HOST_CTRL; + prev.config_off = PCI_HT_CAP_HOST_WIDTH; + prev.freq_off = PCI_HT_CAP_HOST_FREQ; + prev.freq_cap_off = PCI_HT_CAP_HOST_FREQ_CAP; + + /* Wait until the link initialization is complete */ + do { + ctrl = pci_read_config16(prev.dev, prev.pos + prev.ctrl_off); + /* Is this the end of the hypertransport chain */ + if (ctrl & (1 << 6)) { + return; + } + /* Has the link failed? */ + if (ctrl & (1 << 4)) { + /* + * Either the link has failed, or we have + * a CRC error. + * Sometimes this can happen due to link + * retrain, so lets knock it down and see + * if its transient + */ + ctrl |= ((1 << 4) | (1 <<8)); // Link fail + Crc + pci_write_config16(prev.dev, prev.pos + prev.ctrl_off, ctrl); + ctrl = pci_read_config16(prev.dev, prev.pos + prev.ctrl_off); + if (ctrl & ((1 << 4) | (1 << 8))) { + printk_alert("Detected error on Hypertransport Link\n"); + return; + } + } + } while((ctrl & (1 << 5)) == 0); + + //actually, only for one HT device HT chain, and unitid is 0 +#if HT_CHAIN_UNITID_BASE == 0 + if(offset_unitid) { + return; + } +#endif + + /* Check if is already collapsed */ + if((!offset_unitid)|| (offset_unitid && (!((HT_CHAIN_END_UNITID_BASE == 0) && (HT_CHAIN_END_UNITID_BASE children; bus->children = 0; - chain_last = &bus->children; /* Initialize the hypertransport enumeration state */ - reset_needed = 0; prev.dev = bus->dev; prev.pos = bus->cap; + prev.ctrl_off = PCI_HT_CAP_HOST_CTRL; prev.config_off = PCI_HT_CAP_HOST_WIDTH; prev.freq_off = PCI_HT_CAP_HOST_FREQ; prev.freq_cap_off = PCI_HT_CAP_HOST_FREQ_CAP; @@ -214,65 +384,50 @@ unsigned int hypertransport_scan_chain(struct bus *bus, unsigned int max) /* If present assign unitid to a hypertransport chain */ last_unitid = min_unitid -1; next_unitid = min_unitid; - previous_pos = 0; do { - uint32_t id, class; - uint8_t hdr_type, pos; + uint8_t pos; uint16_t flags; unsigned count, static_count; + unsigned ctrl; - previous_unitid = last_unitid; last_unitid = next_unitid; - /* Get setup the device_structure */ - dev = ht_scan_get_devs(&old_devices); + /* Wait until the link initialization is complete */ + do { + ctrl = pci_read_config16(prev.dev, prev.pos + prev.ctrl_off); - if (!dev) { - struct device dummy; - dummy.bus = bus; - dummy.path.type = DEVICE_PATH_PCI; - dummy.path.u.pci.devfn = 0; - id = pci_read_config32(&dummy, PCI_VENDOR_ID); - /* If the chain is fully enumerated quit */ - if (id == 0xffffffff || id == 0x00000000 || - id == 0x0000ffff || id == 0xffff0000) { - break; - } - dev = alloc_dev(bus, &dummy.path); - } - else { - /* Add this device to the pci bus chain */ - *chain_last = dev; - /* Run the magice enable/disable sequence for the device */ - if (dev->chip && dev->chip->control && dev->chip->control->enable_dev) { - dev->chip->control->enable_dev(dev); - } - /* Now read the vendor and device id */ - id = pci_read_config32(dev, PCI_VENDOR_ID); - - /* If the chain is fully enumerated quit */ - if (id == 0xffffffff || id == 0x00000000 || - id == 0x0000ffff || id == 0xffff0000) { - printk_err("Missing static device: %s\n", - dev_path(dev)); - break; + if (ctrl & (1 << 6)) + goto end_of_chain; // End of chain + + if (ctrl & ((1 << 4) | (1 << 8))) { + /* + * Either the link has failed, or we have + * a CRC error. + * Sometimes this can happen due to link + * retrain, so lets knock it down and see + * if its transient + */ + ctrl |= ((1 << 4) | (1 <<8)); // Link fail + Crc + pci_write_config16(prev.dev, prev.pos + prev.ctrl_off, ctrl); + ctrl = pci_read_config16(prev.dev, prev.pos + prev.ctrl_off); + if (ctrl & ((1 << 4) | (1 << 8))) { + printk_alert("Detected error on Hypertransport Link\n"); + goto end_of_chain; + } } - } - /* Update the device chain tail */ - for(func = dev; func; func = func->sibling) { - chain_last = &func->sibling; - } - - /* Read the rest of the pci configuration information */ - hdr_type = pci_read_config8(dev, PCI_HEADER_TYPE); - class = pci_read_config32(dev, PCI_CLASS_REVISION); + } while((ctrl & (1 << 5)) == 0); - /* Store the interesting information in the device structure */ - dev->vendor = id & 0xffff; - dev->device = (id >> 16) & 0xffff; - dev->hdr_type = hdr_type; - /* class code, the upper 3 bytes of PCI_CLASS_REVISION */ - dev->class = class >> 8; + + /* Get and setup the device_structure */ + dev = ht_scan_get_devs(&old_devices); + + /* See if a device is present and setup the + * device structure. + */ + dev = pci_probe_dev(dev, bus, 0); + if (!dev || !dev->enabled) { + break; + } /* Find the hypertransport link capability */ pos = ht_lookup_slave_capability(dev); @@ -284,9 +439,19 @@ unsigned int hypertransport_scan_chain(struct bus *bus, unsigned int max) /* Update the Unitid of the current device */ flags = pci_read_config16(dev, pos + PCI_CAP_FLAGS); + + /* If the devices has a unitid set and is at devfn 0 we are done. + * This can happen with shadow hypertransport devices, + * or if we have reached the bottom of a + * hypertransport device chain. + */ + if (flags & 0x1f) { + break; + } + flags &= ~0x1f; /* mask out base Unit ID */ - flags |= next_unitid & 0x1f; - pci_write_config16(dev, pos + PCI_CAP_FLAGS, flags); + flags |= next_unitid & 0x1f; + pci_write_config16(dev, pos + PCI_CAP_FLAGS, flags); /* Update the Unitd id in the device structure */ static_count = 1; @@ -294,6 +459,7 @@ unsigned int hypertransport_scan_chain(struct bus *bus, unsigned int max) func->path.u.pci.devfn += (next_unitid << 3); static_count = (func->path.u.pci.devfn >> 3) - (dev->path.u.pci.devfn >> 3) + 1; + last_func = func; } /* Compute the number of unitids consumed */ @@ -305,26 +471,113 @@ unsigned int hypertransport_scan_chain(struct bus *bus, unsigned int max) } /* Update the Unitid of the next device */ + ht_unitid_base[ht_dev_num] = next_unitid; + ht_dev_num++; +#if HT_CHAIN_END_UNITID_BASE < HT_CHAIN_UNITID_BASE + if(offset_unitid) { + real_last_unitid = next_unitid; + real_last_pos = pos; + real_last_dev = dev; + } +#endif next_unitid += count; /* Setup the hypetransport link */ - reset_needed |= ht_setup_link(&prev, dev, pos); + bus->reset_needed |= ht_setup_link(&prev, dev, pos); printk_debug("%s [%04x/%04x] %s next_unitid: %04x\n", dev_path(dev), dev->vendor, dev->device, - (dev->enable? "enabled": "disabled"), next_unitid); + (dev->enabled? "enabled": "disabled"), next_unitid); + - } while((last_unitid != next_unitid) && (next_unitid <= 0x1f)); -#if HAVE_HARD_RESET == 1 - if(reset_needed) { + } while((last_unitid != next_unitid) && (next_unitid <= (max_devfn >> 3))); + end_of_chain: +#if OPT_HT_LINK == 1 + if(bus->reset_needed) { printk_info("HyperT reset needed\n"); - hard_reset(); } - printk_debug("HyperT reset not needed\n"); + else { + printk_debug("HyperT reset not needed\n"); + } #endif + +#if HT_CHAIN_END_UNITID_BASE < HT_CHAIN_UNITID_BASE + if(offset_unitid && (ht_dev_num>0)) { + uint16_t flags; + int i; + device_t last_func = 0; + flags = pci_read_config16(real_last_dev, real_last_pos + PCI_CAP_FLAGS); + flags &= ~0x1f; + flags |= HT_CHAIN_END_UNITID_BASE & 0x1f; + pci_write_config16(real_last_dev, real_last_pos + PCI_CAP_FLAGS, flags); + + for(func = real_last_dev; func; func = func->sibling) { + func->path.u.pci.devfn -= ((real_last_unitid - HT_CHAIN_END_UNITID_BASE) << 3); + last_func = func; + } + + ht_unitid_base[ht_dev_num-1] = HT_CHAIN_END_UNITID_BASE; // update last one + + next_unitid = real_last_unitid; + } +#endif + if (next_unitid > 0x1f) { next_unitid = 0x1f; } - return pci_scan_bus(bus, 0x00, (next_unitid << 3)|7, max); + + /* Die if any leftover Static devices are are found. + * There's probably a problem in the Config.lb. + */ + if(old_devices) { + device_t left; + for(left = old_devices; left; left = left->sibling) { + printk_debug("%s\n", dev_path(left)); + } + printk_err("HT: Left over static devices. Check your Config.lb\n"); + if(last_func && !last_func->sibling) // put back the left over static device, and let pci_scan_bus disable it + last_func->sibling = old_devices; + } + + /* Now that nothing is overlapping it is safe to scan the + * children. + */ + max = pci_scan_bus(bus, 0x00, (next_unitid << 3)|7, max); + return max; +} + +/** + * @brief Scan a PCI bridge and the buses behind the bridge. + * + * Determine the existence of buses behind the bridge. Set up the bridge + * according to the result of the scan. + * + * This function is the default scan_bus() method for PCI bridge devices. + * + * @param dev pointer to the bridge device + * @param max the highest bus number assgined up to now + * + * @return The maximum bus number found, after scanning all subordinate busses + */ +unsigned int ht_scan_bridge(struct device *dev, unsigned int max) +{ + return do_pci_scan_bridge(dev, max, hypertransport_scan_chain); } + + +/** Default device operations for hypertransport bridges */ +static struct pci_operations ht_bus_ops_pci = { + .set_subsystem = 0, +}; + +struct device_operations default_ht_ops_bus = { + .read_resources = pci_bus_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_bus_enable_resources, + .init = 0, + .scan_bus = ht_scan_bridge, + .enable = 0, + .reset_bus = pci_bus_reset, + .ops_pci = &ht_bus_ops_pci, +};