1 files changed, 292 insertions, 0 deletions
diff --git a/libdde-linux26/contrib/drivers/pci/setup-res.c b/libdde-linux26/contrib/drivers/pci/setup-res.c
new file mode 100644
index 00000000..32e8d88a
--- /dev/null
+++ b/libdde-linux26/contrib/drivers/pci/setup-res.c
@@ -0,0 +1,292 @@
+/*
+ *	drivers/pci/setup-res.c
+ *
+ * Extruded from code written by
+ *      Dave Rusling (david.rusling@reo.mts.dec.com)
+ *      David Mosberger (davidm@cs.arizona.edu)
+ *	David Miller (davem@redhat.com)
+ *
+ * Support routines for initializing a PCI subsystem.
+ */
+
+/* fixed for multiple pci buses, 1999 Andrea Arcangeli <andrea@suse.de> */
+
+/*
+ * Nov 2000, Ivan Kokshaysky <ink@jurassic.park.msu.ru>
+ *	     Resource sorting
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/cache.h>
+#include <linux/slab.h>
+#include "pci.h"
+
+
+void pci_update_resource(struct pci_dev *dev, int resno)
+{
+	struct pci_bus_region region;
+	u32 new, check, mask;
+	int reg;
+	enum pci_bar_type type;
+	struct resource *res = dev->resource + resno;
+
+	/*
+	 * Ignore resources for unimplemented BARs and unused resource slots
+	 * for 64 bit BARs.
+	 */
+	if (!res->flags)
+		return;
+
+	/*
+	 * Ignore non-moveable resources.  This might be legacy resources for
+	 * which no functional BAR register exists or another important
+	 * system resource we shouldn't move around.
+	 */
+	if (res->flags & IORESOURCE_PCI_FIXED)
+		return;
+
+	pcibios_resource_to_bus(dev, &region, res);
+
+	dev_dbg(&dev->dev, "BAR %d: got res %pR bus [%#llx-%#llx] "
+		"flags %#lx\n", resno, res,
+		 (unsigned long long)region.start,
+		 (unsigned long long)region.end,
+		 (unsigned long)res->flags);
+
+	new = region.start | (res->flags & PCI_REGION_FLAG_MASK);
+	if (res->flags & IORESOURCE_IO)
+		mask = (u32)PCI_BASE_ADDRESS_IO_MASK;
+	else
+		mask = (u32)PCI_BASE_ADDRESS_MEM_MASK;
+
+	reg = pci_resource_bar(dev, resno, &type);
+	if (!reg)
+		return;
+	if (type != pci_bar_unknown) {
+		if (!(res->flags & IORESOURCE_ROM_ENABLE))
+			return;
+		new |= PCI_ROM_ADDRESS_ENABLE;
+	}
+
+	pci_write_config_dword(dev, reg, new);
+	pci_read_config_dword(dev, reg, &check);
+
+	if ((new ^ check) & mask) {
+		dev_err(&dev->dev, "BAR %d: error updating (%#08x != %#08x)\n",
+			resno, new, check);
+	}
+
+	if ((new & (PCI_BASE_ADDRESS_SPACE|PCI_BASE_ADDRESS_MEM_TYPE_MASK)) ==
+	    (PCI_BASE_ADDRESS_SPACE_MEMORY|PCI_BASE_ADDRESS_MEM_TYPE_64)) {
+		new = region.start >> 16 >> 16;
+		pci_write_config_dword(dev, reg + 4, new);
+		pci_read_config_dword(dev, reg + 4, &check);
+		if (check != new) {
+			dev_err(&dev->dev, "BAR %d: error updating "
+			       "(high %#08x != %#08x)\n", resno, new, check);
+		}
+	}
+	res->flags &= ~IORESOURCE_UNSET;
+	dev_dbg(&dev->dev, "BAR %d: moved to bus [%#llx-%#llx] flags %#lx\n",
+		resno, (unsigned long long)region.start,
+		(unsigned long long)region.end, res->flags);
+}
+
+int pci_claim_resource(struct pci_dev *dev, int resource)
+{
+	struct resource *res = &dev->resource[resource];
+	struct resource *root = NULL;
+	char *dtype = resource < PCI_BRIDGE_RESOURCES ? "device" : "bridge";
+	int err;
+
+	root = pcibios_select_root(dev, res);
+
+	err = -EINVAL;
+	if (root != NULL)
+		err = insert_resource(root, res);
+
+	if (err) {
+		dev_err(&dev->dev, "BAR %d: %s of %s %pR\n",
+			resource,
+			root ? "address space collision on" :
+				"no parent found for",
+			dtype, res);
+	}
+
+	return err;
+}
+
+int pci_assign_resource(struct pci_dev *dev, int resno)
+{
+	struct pci_bus *bus = dev->bus;
+	struct resource *res = dev->resource + resno;
+	resource_size_t size, min, align;
+	int ret;
+
+	size = resource_size(res);
+	min = (res->flags & IORESOURCE_IO) ? PCIBIOS_MIN_IO : PCIBIOS_MIN_MEM;
+
+	align = resource_alignment(res);
+	if (!align) {
+		dev_info(&dev->dev, "BAR %d: can't allocate resource (bogus "
+			"alignment) %pR flags %#lx\n",
+			resno, res, res->flags);
+		return -EINVAL;
+	}
+
+	/* First, try exact prefetching match.. */
+	ret = pci_bus_alloc_resource(bus, res, size, align, min,
+				     IORESOURCE_PREFETCH,
+				     pcibios_align_resource, dev);
+
+	if (ret < 0 && (res->flags & IORESOURCE_PREFETCH)) {
+		/*
+		 * That failed.
+		 *
+		 * But a prefetching area can handle a non-prefetching
+		 * window (it will just not perform as well).
+		 */
+		ret = pci_bus_alloc_resource(bus, res, size, align, min, 0,
+					     pcibios_align_resource, dev);
+	}
+
+	if (ret) {
+		dev_info(&dev->dev, "BAR %d: can't allocate %s resource %pR\n",
+			resno, res->flags & IORESOURCE_IO ? "I/O" : "mem", res);
+	} else {
+		res->flags &= ~IORESOURCE_STARTALIGN;
+		if (resno < PCI_BRIDGE_RESOURCES)
+			pci_update_resource(dev, resno);
+	}
+
+	return ret;
+}
+
+#if 0
+int pci_assign_resource_fixed(struct pci_dev *dev, int resno)
+{
+	struct pci_bus *bus = dev->bus;
+	struct resource *res = dev->resource + resno;
+	unsigned int type_mask;
+	int i, ret = -EBUSY;
+
+	type_mask = IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH;
+
+	for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
+		struct resource *r = bus->resource[i];
+		if (!r)
+			continue;
+
+		/* type_mask must match */
+		if ((res->flags ^ r->flags) & type_mask)
+			continue;
+
+		ret = request_resource(r, res);
+
+		if (ret == 0)
+			break;
+	}
+
+	if (ret) {
+		dev_err(&dev->dev, "BAR %d: can't allocate %s resource %pR\n",
+			resno, res->flags & IORESOURCE_IO ? "I/O" : "mem", res);
+	} else if (resno < PCI_BRIDGE_RESOURCES) {
+		pci_update_resource(dev, resno);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(pci_assign_resource_fixed);
+#endif
+
+/* Sort resources by alignment */
+void pdev_sort_resources(struct pci_dev *dev, struct resource_list *head)
+{
+	int i;
+
+	for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+		struct resource *r;
+		struct resource_list *list, *tmp;
+		resource_size_t r_align;
+
+		r = &dev->resource[i];
+
+		if (r->flags & IORESOURCE_PCI_FIXED)
+			continue;
+
+		if (!(r->flags) || r->parent)
+			continue;
+
+		r_align = resource_alignment(r);
+		if (!r_align) {
+			dev_warn(&dev->dev, "BAR %d: bogus alignment "
+				"%pR flags %#lx\n",
+				i, r, r->flags);
+			continue;
+		}
+		for (list = head; ; list = list->next) {
+			resource_size_t align = 0;
+			struct resource_list *ln = list->next;
+
+			if (ln)
+				align = resource_alignment(ln->res);
+
+			if (r_align > align) {
+				tmp = kmalloc(sizeof(*tmp), GFP_KERNEL);
+				if (!tmp)
+					panic("pdev_sort_resources(): "
+					      "kmalloc() failed!\n");
+				tmp->next = ln;
+				tmp->res = r;
+				tmp->dev = dev;
+				list->next = tmp;
+				break;
+			}
+		}
+	}
+}
+
+int pci_enable_resources(struct pci_dev *dev, int mask)
+{
+	u16 cmd, old_cmd;
+	int i;
+	struct resource *r;
+
+	pci_read_config_word(dev, PCI_COMMAND, &cmd);
+	old_cmd = cmd;
+
+	for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+		if (!(mask & (1 << i)))
+			continue;
+
+		r = &dev->resource[i];
+
+		if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
+			continue;
+		if ((i == PCI_ROM_RESOURCE) &&
+				(!(r->flags & IORESOURCE_ROM_ENABLE)))
+			continue;
+
+		if (!r->parent) {
+			dev_err(&dev->dev, "device not available because of "
+				"BAR %d %pR collisions\n", i, r);
+			return -EINVAL;
+		}
+
+		if (r->flags & IORESOURCE_IO)
+			cmd |= PCI_COMMAND_IO;
+		if (r->flags & IORESOURCE_MEM)
+			cmd |= PCI_COMMAND_MEMORY;
+	}
+
+	if (cmd != old_cmd) {
+		dev_info(&dev->dev, "enabling device (%04x -> %04x)\n",
+			 old_cmd, cmd);
+		pci_write_config_word(dev, PCI_COMMAND, cmd);
+	}
+	return 0;
+}