#include "pci.h" // pci_config_writel
#include "ioport.h" // outl
#include "util.h" // dprintf
-#include "config.h" // CONFIG_*
+#include "paravirt.h" // romfile_loadint
+#include "farptr.h" // MAKE_FLATPTR
#include "pci_regs.h" // PCI_VENDOR_ID
#include "pci_ids.h" // PCI_CLASS_DISPLAY_VGA
pci_config_writew(bdf, addr, val);
}
-// Helper function for foreachpci() macro - return next device
+// Helper function for foreachbdf() macro - return next device
int
-pci_next(int bdf, int *pmax)
+pci_next(int bdf, int bus)
{
- if (pci_bdf_to_fn(bdf) == 1
- && (pci_config_readb(bdf-1, PCI_HEADER_TYPE) & 0x80) == 0)
+ if (pci_bdf_to_fn(bdf) == 0
+ && (pci_config_readb(bdf, PCI_HEADER_TYPE) & 0x80) == 0)
// Last found device wasn't a multi-function device - skip to
// the next device.
- bdf += 7;
+ bdf += 8;
+ else
+ bdf += 1;
- int max = *pmax;
for (;;) {
- if (bdf >= max) {
- if (CONFIG_PCI_ROOT1 && bdf <= (CONFIG_PCI_ROOT1 << 8))
- bdf = CONFIG_PCI_ROOT1 << 8;
- else if (CONFIG_PCI_ROOT2 && bdf <= (CONFIG_PCI_ROOT2 << 8))
- bdf = CONFIG_PCI_ROOT2 << 8;
- else
- return -1;
- *pmax = max = bdf + 0x0100;
- }
+ if (pci_bdf_to_bus(bdf) != bus)
+ return -1;
u16 v = pci_config_readw(bdf, PCI_VENDOR_ID);
if (v != 0x0000 && v != 0xffff)
// Device is present.
- break;
+ return bdf;
if (pci_bdf_to_fn(bdf) == 0)
bdf += 8;
else
bdf += 1;
}
+}
- // Check if found device is a bridge.
- u32 v = pci_config_readb(bdf, PCI_HEADER_TYPE);
- v &= 0x7f;
- if (v == PCI_HEADER_TYPE_BRIDGE || v == PCI_HEADER_TYPE_CARDBUS) {
- v = pci_config_readl(bdf, PCI_PRIMARY_BUS);
- int newmax = (v & 0xff00) + 0x0100;
- if (newmax > max)
- *pmax = newmax;
- }
+struct pci_device *PCIDevices;
+int MaxPCIBus VAR16VISIBLE;
- return bdf;
+// Check if PCI is available at all
+int
+pci_probe_host(void)
+{
+ outl(0x80000000, PORT_PCI_CMD);
+ if (inl(PORT_PCI_CMD) != 0x80000000) {
+ dprintf(1, "Detected non-PCI system\n");
+ return -1;
+ }
+ return 0;
}
-// Find a vga device with legacy address decoding enabled.
-int
-pci_find_vga(void)
+// Find all PCI devices and populate PCIDevices linked list.
+void
+pci_probe_devices(void)
{
- int bdf = 0x0000, max = 0x0100;
- for (;;) {
- if (bdf >= max) {
- if (CONFIG_PCI_ROOT1 && bdf <= (CONFIG_PCI_ROOT1 << 8))
- bdf = CONFIG_PCI_ROOT1 << 8;
- else if (CONFIG_PCI_ROOT2 && bdf <= (CONFIG_PCI_ROOT2 << 8))
- bdf = CONFIG_PCI_ROOT2 << 8;
- else
- return -1;
- max = bdf + 0x0100;
- }
+ dprintf(3, "PCI probe\n");
+ struct pci_device *busdevs[256];
+ memset(busdevs, 0, sizeof(busdevs));
+ struct pci_device **pprev = &PCIDevices;
+ int extraroots = romfile_loadint("etc/extra-pci-roots", 0);
+ int bus = -1, lastbus = 0, rootbuses = 0, count=0;
+ while (bus < 0xff && (bus < MaxPCIBus || rootbuses < extraroots)) {
+ bus++;
+ int bdf;
+ foreachbdf(bdf, bus) {
+ // Create new pci_device struct and add to list.
+ struct pci_device *dev = malloc_tmp(sizeof(*dev));
+ if (!dev) {
+ warn_noalloc();
+ return;
+ }
+ memset(dev, 0, sizeof(*dev));
+ *pprev = dev;
+ pprev = &dev->next;
+ count++;
- u16 cls = pci_config_readw(bdf, PCI_CLASS_DEVICE);
- if (cls == 0x0000 || cls == 0xffff) {
- // Device not present.
- if (pci_bdf_to_fn(bdf) == 0)
- bdf += 8;
- else
- bdf += 1;
- continue;
- }
- if (cls == PCI_CLASS_DISPLAY_VGA) {
- u16 cmd = pci_config_readw(bdf, PCI_COMMAND);
- if (cmd & PCI_COMMAND_IO && cmd & PCI_COMMAND_MEMORY)
- // Found active vga card
- return bdf;
- }
+ // Find parent device.
+ int rootbus;
+ struct pci_device *parent = busdevs[bus];
+ if (!parent) {
+ if (bus != lastbus)
+ rootbuses++;
+ lastbus = bus;
+ rootbus = rootbuses;
+ if (bus > MaxPCIBus)
+ MaxPCIBus = bus;
+ } else {
+ rootbus = parent->rootbus;
+ }
- // Check if device is a bridge.
- u8 hdr = pci_config_readb(bdf, PCI_HEADER_TYPE);
- u8 ht = hdr & 0x7f;
- if (ht == PCI_HEADER_TYPE_BRIDGE || ht == PCI_HEADER_TYPE_CARDBUS) {
- u32 ctrl = pci_config_readb(bdf, PCI_BRIDGE_CONTROL);
- if (ctrl & PCI_BRIDGE_CTL_VGA) {
- // Found a VGA enabled bridge.
- u32 pbus = pci_config_readl(bdf, PCI_PRIMARY_BUS);
- bdf = (pbus & 0xff00);
- max = bdf + 0x100;
- continue;
+ // Populate pci_device info.
+ dev->bdf = bdf;
+ dev->parent = parent;
+ dev->rootbus = rootbus;
+ u32 vendev = pci_config_readl(bdf, PCI_VENDOR_ID);
+ dev->vendor = vendev & 0xffff;
+ dev->device = vendev >> 16;
+ u32 classrev = pci_config_readl(bdf, PCI_CLASS_REVISION);
+ dev->class = classrev >> 16;
+ dev->prog_if = classrev >> 8;
+ dev->revision = classrev & 0xff;
+ dev->header_type = pci_config_readb(bdf, PCI_HEADER_TYPE);
+ u8 v = dev->header_type & 0x7f;
+ if (v == PCI_HEADER_TYPE_BRIDGE || v == PCI_HEADER_TYPE_CARDBUS) {
+ u8 secbus = pci_config_readb(bdf, PCI_SECONDARY_BUS);
+ dev->secondary_bus = secbus;
+ if (secbus > bus && !busdevs[secbus])
+ busdevs[secbus] = dev;
+ if (secbus > MaxPCIBus)
+ MaxPCIBus = secbus;
}
+ dprintf(4, "PCI device %02x:%02x.%x (vd=%04x:%04x c=%04x)\n"
+ , pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf)
+ , pci_bdf_to_fn(bdf)
+ , dev->vendor, dev->device, dev->class);
}
-
- if (pci_bdf_to_fn(bdf) == 0 && (hdr & 0x80) == 0)
- // Last found device wasn't a multi-function device - skip to
- // the next device.
- bdf += 8;
- else
- bdf += 1;
}
+ dprintf(1, "Found %d PCI devices (max PCI bus is %02x)\n", count, MaxPCIBus);
}
// Search for a device with the specified vendor and device ids.
-int
+struct pci_device *
pci_find_device(u16 vendid, u16 devid)
{
- u32 id = (devid << 16) | vendid;
- int bdf, max;
- foreachpci(bdf, max) {
- u32 v = pci_config_readl(bdf, PCI_VENDOR_ID);
- if (v == id)
- return bdf;
+ struct pci_device *pci;
+ foreachpci(pci) {
+ if (pci->vendor == vendid && pci->device == devid)
+ return pci;
}
- return -1;
+ return NULL;
}
// Search for a device with the specified class id.
-int
+struct pci_device *
pci_find_class(u16 classid)
{
- int bdf, max;
- foreachpci(bdf, max) {
- u16 v = pci_config_readw(bdf, PCI_CLASS_DEVICE);
- if (v == classid)
- return bdf;
+ struct pci_device *pci;
+ foreachpci(pci) {
+ if (pci->class == classid)
+ return pci;
}
- return -1;
+ return NULL;
}
-int pci_init_device(const struct pci_device_id *ids, u16 bdf, void *arg)
+int pci_init_device(const struct pci_device_id *ids
+ , struct pci_device *pci, void *arg)
{
- u16 vendor_id = pci_config_readw(bdf, PCI_VENDOR_ID);
- u16 device_id = pci_config_readw(bdf, PCI_DEVICE_ID);
- u16 class = pci_config_readw(bdf, PCI_CLASS_DEVICE);
-
while (ids->vendid || ids->class_mask) {
- if ((ids->vendid == PCI_ANY_ID || ids->vendid == vendor_id) &&
- (ids->devid == PCI_ANY_ID || ids->devid == device_id) &&
- !((ids->class ^ class) & ids->class_mask)) {
- if (ids->func) {
- ids->func(bdf, arg);
- }
+ if ((ids->vendid == PCI_ANY_ID || ids->vendid == pci->vendor) &&
+ (ids->devid == PCI_ANY_ID || ids->devid == pci->device) &&
+ !((ids->class ^ pci->class) & ids->class_mask)) {
+ if (ids->func)
+ ids->func(pci, arg);
return 0;
}
ids++;
return -1;
}
-int pci_find_init_device(const struct pci_device_id *ids, void *arg)
+struct pci_device *
+pci_find_init_device(const struct pci_device_id *ids, void *arg)
{
- int bdf, max;
-
- foreachpci(bdf, max) {
- if (pci_init_device(ids, bdf, arg) == 0) {
- return bdf;
- }
+ struct pci_device *pci;
+ foreachpci(pci) {
+ if (pci_init_device(ids, pci, arg) == 0)
+ return pci;
}
- return -1;
+ return NULL;
}
void
outb(v|6, PORT_PCI_REBOOT); /* Actually do the reset */
udelay(50);
}
+
+// helper functions to access pci mmio bars from real mode
+
+u32 VISIBLE32FLAT
+pci_readl_32(u32 addr)
+{
+ dprintf(3, "32: pci read : %x\n", addr);
+ return readl((void*)addr);
+}
+
+u32 pci_readl(u32 addr)
+{
+ if (MODESEGMENT) {
+ dprintf(3, "16: pci read : %x\n", addr);
+ extern void _cfunc32flat_pci_readl_32(u32 addr);
+ return call32(_cfunc32flat_pci_readl_32, addr, -1);
+ } else {
+ return pci_readl_32(addr);
+ }
+}
+
+struct reg32 {
+ u32 addr;
+ u32 data;
+};
+
+void VISIBLE32FLAT
+pci_writel_32(struct reg32 *reg32)
+{
+ dprintf(3, "32: pci write: %x, %x (%p)\n", reg32->addr, reg32->data, reg32);
+ writel((void*)(reg32->addr), reg32->data);
+}
+
+void pci_writel(u32 addr, u32 val)
+{
+ struct reg32 reg32 = { .addr = addr, .data = val };
+ if (MODESEGMENT) {
+ dprintf(3, "16: pci write: %x, %x (%x:%p)\n",
+ reg32.addr, reg32.data, GET_SEG(SS), ®32);
+ void *flatptr = MAKE_FLATPTR(GET_SEG(SS), ®32);
+ extern void _cfunc32flat_pci_writel_32(struct reg32 *reg32);
+ call32(_cfunc32flat_pci_writel_32, (u32)flatptr, -1);
+ } else {
+ pci_writel_32(®32);
+ }
+}
projects / seabios.git / blobdiff