Start importing the basic OFED linux compatibility layer changes made

by dumbbell@ to be able to compile this layer as a dependency module.
Clean up some Makefiles and remove the no longer used OFED define.
Currently only i386 and amd64 targets are supported.

MFC after:		1 month
Sponsored by:		Mellanox Technologies

1 files changed, 206 insertions, 0 deletions

diff --git a/sys/ofed/include/linux/linux_pci.c b/sys/ofed/include/linux/linux_pci.c
new file mode 100644
index 0000000..a76de88
--- /dev/null
+++ b/sys/ofed/include/linux/linux_pci.c
@@ -0,0 +1,206 @@
+/* $FreeBSD$ */
+/*-
+ * Copyright (c) 2015 Mellanox Technologies, Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+#include <sys/sysctl.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/bus.h>
+#include <sys/fcntl.h>
+#include <sys/file.h>
+#include <sys/filio.h>
+#include <sys/rwlock.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+
+#include <machine/stdarg.h>
+#include <machine/pmap.h>
+
+#include <linux/kobject.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/cdev.h>
+#include <linux/file.h>
+#include <linux/sysfs.h>
+#include <linux/mm.h>
+#include <linux/io.h>
+#include <linux/vmalloc.h>
+#include <linux/pci.h>
+
+static device_probe_t linux_pci_probe;
+static device_attach_t linux_pci_attach;
+static device_detach_t linux_pci_detach;
+
+static device_method_t pci_methods[] = {
+	DEVMETHOD(device_probe, linux_pci_probe),
+	DEVMETHOD(device_attach, linux_pci_attach),
+	DEVMETHOD(device_detach, linux_pci_detach),
+	DEVMETHOD_END
+};
+
+static struct pci_driver *
+linux_pci_find(device_t dev, const struct pci_device_id **idp)
+{
+	const struct pci_device_id *id;
+	struct pci_driver *pdrv;
+	uint16_t vendor;
+	uint16_t device;
+
+	vendor = pci_get_vendor(dev);
+	device = pci_get_device(dev);
+
+	spin_lock(&pci_lock);
+	list_for_each_entry(pdrv, &pci_drivers, links) {
+		for (id = pdrv->id_table; id->vendor != 0; id++) {
+			if (vendor == id->vendor && device == id->device) {
+				*idp = id;
+				spin_unlock(&pci_lock);
+				return (pdrv);
+			}
+		}
+	}
+	spin_unlock(&pci_lock);
+	return (NULL);
+}
+
+static int
+linux_pci_probe(device_t dev)
+{
+	const struct pci_device_id *id;
+	struct pci_driver *pdrv;
+
+	if ((pdrv = linux_pci_find(dev, &id)) == NULL)
+		return (ENXIO);
+	if (device_get_driver(dev) != &pdrv->driver)
+		return (ENXIO);
+	device_set_desc(dev, pdrv->name);
+	return (0);
+}
+
+static int
+linux_pci_attach(device_t dev)
+{
+	struct resource_list_entry *rle;
+	struct pci_dev *pdev;
+	struct pci_driver *pdrv;
+	const struct pci_device_id *id;
+	int error;
+
+	pdrv = linux_pci_find(dev, &id);
+	pdev = device_get_softc(dev);
+	pdev->dev.parent = &linux_rootdev;
+	pdev->dev.bsddev = dev;
+	INIT_LIST_HEAD(&pdev->dev.irqents);
+	pdev->device = id->device;
+	pdev->vendor = id->vendor;
+	pdev->dev.dma_mask = &pdev->dma_mask;
+	pdev->pdrv = pdrv;
+	kobject_init(&pdev->dev.kobj, &dev_ktype);
+	kobject_set_name(&pdev->dev.kobj, device_get_nameunit(dev));
+	kobject_add(&pdev->dev.kobj, &linux_rootdev.kobj,
+	    kobject_name(&pdev->dev.kobj));
+	rle = _pci_get_rle(pdev, SYS_RES_IRQ, 0);
+	if (rle)
+		pdev->dev.irq = rle->start;
+	else
+		pdev->dev.irq = 0;
+	pdev->irq = pdev->dev.irq;
+	mtx_unlock(&Giant);
+	spin_lock(&pci_lock);
+	list_add(&pdev->links, &pci_devices);
+	spin_unlock(&pci_lock);
+	error = pdrv->probe(pdev, id);
+	mtx_lock(&Giant);
+	if (error) {
+		spin_lock(&pci_lock);
+		list_del(&pdev->links);
+		spin_unlock(&pci_lock);
+		put_device(&pdev->dev);
+		return (-error);
+	}
+	return (0);
+}
+
+static int
+linux_pci_detach(device_t dev)
+{
+	struct pci_dev *pdev;
+
+	pdev = device_get_softc(dev);
+	mtx_unlock(&Giant);
+	pdev->pdrv->remove(pdev);
+	mtx_lock(&Giant);
+	spin_lock(&pci_lock);
+	list_del(&pdev->links);
+	spin_unlock(&pci_lock);
+	put_device(&pdev->dev);
+
+	return (0);
+}
+
+int
+pci_register_driver(struct pci_driver *pdrv)
+{
+	devclass_t bus;
+	int error = 0;
+
+	bus = devclass_find("pci");
+
+	spin_lock(&pci_lock);
+	list_add(&pdrv->links, &pci_drivers);
+	spin_unlock(&pci_lock);
+	pdrv->driver.name = pdrv->name;
+	pdrv->driver.methods = pci_methods;
+	pdrv->driver.size = sizeof(struct pci_dev);
+	mtx_lock(&Giant);
+	if (bus != NULL) {
+		error = devclass_add_driver(bus, &pdrv->driver, BUS_PASS_DEFAULT,
+		    &pdrv->bsdclass);
+	}
+	mtx_unlock(&Giant);
+	return (-error);
+}
+
+void
+pci_unregister_driver(struct pci_driver *pdrv)
+{
+	devclass_t bus;
+
+	bus = devclass_find("pci");
+
+	list_del(&pdrv->links);
+	mtx_lock(&Giant);
+	if (bus != NULL)
+		devclass_delete_driver(bus, &pdrv->driver);
+	mtx_unlock(&Giant);
+}
+