/*-
* GPL LICENSE SUMMARY
*
- * Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
*
- * This program is free software; you can redistribute it and/or modify
+ * This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- * The full GNU General Public License is included in this distribution
+ * The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* Contact Information:
* Intel Corporation
- *
*/
#include <linux/device.h>
#include <linux/msi.h>
#include <linux/version.h>
-/* Some function names changes between 3.2.0 and 3.3.0... */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3,3,0)
-#define PCI_LOCK pci_block_user_cfg_access
-#define PCI_UNLOCK pci_unblock_user_cfg_access
-#else
-#define PCI_LOCK pci_cfg_access_lock
-#define PCI_UNLOCK pci_cfg_access_unlock
-#endif
-
/**
* MSI-X related macros, copy from linux/pci_regs.h in kernel 2.6.39,
* but none of them in kernel 2.6.35.
msix_entries[IGBUIO_NUM_MSI_VECTORS]; /* pointer to the msix vectors to be allocated later */
};
-static const enum igbuio_intr_mode igbuio_intr_mode_preferred = IGBUIO_MSIX_INTR_MODE;
+static char *intr_mode = NULL;
+static enum igbuio_intr_mode igbuio_intr_mode_preferred = IGBUIO_MSIX_INTR_MODE;
/* PCI device id table */
static struct pci_device_id igbuio_pci_ids[] = {
-#define RTE_PCI_DEV_ID_DECL(vend, dev) {PCI_DEVICE(vend, dev)},
+#define RTE_PCI_DEV_ID_DECL_EM(vend, dev) {PCI_DEVICE(vend, dev)},
+#define RTE_PCI_DEV_ID_DECL_IGB(vend, dev) {PCI_DEVICE(vend, dev)},
+#define RTE_PCI_DEV_ID_DECL_IGBVF(vend, dev) {PCI_DEVICE(vend, dev)},
+#define RTE_PCI_DEV_ID_DECL_IXGBE(vend, dev) {PCI_DEVICE(vend, dev)},
+#define RTE_PCI_DEV_ID_DECL_IXGBEVF(vend, dev) {PCI_DEVICE(vend, dev)},
+#define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {PCI_DEVICE(vend, dev)},
#include <rte_pci_dev_ids.h>
{ 0, },
};
+MODULE_DEVICE_TABLE(pci, igbuio_pci_ids);
+
static inline struct rte_uio_pci_dev *
igbuio_get_uio_pci_dev(struct uio_info *info)
{
return container_of(info, struct rte_uio_pci_dev, info);
}
+/* sriov sysfs */
+int local_pci_num_vf(struct pci_dev *dev)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,34)
+ struct iov {
+ int pos;
+ int nres;
+ u32 cap;
+ u16 ctrl;
+ u16 total;
+ u16 initial;
+ u16 nr_virtfn;
+ } *iov = (struct iov*)dev->sriov;
+
+ if (!dev->is_physfn)
+ return 0;
+
+ return iov->nr_virtfn;
+#else
+ return pci_num_vf(dev);
+#endif
+}
+
+static ssize_t
+show_max_vfs(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ return snprintf(buf, 10, "%u\n", local_pci_num_vf(
+ container_of(dev, struct pci_dev, dev)));
+}
+
+static ssize_t
+store_max_vfs(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int err = 0;
+ unsigned long max_vfs;
+ struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
+
+ if (0 != strict_strtoul(buf, 0, &max_vfs))
+ return -EINVAL;
+
+ if (0 == max_vfs)
+ pci_disable_sriov(pdev);
+ else if (0 == local_pci_num_vf(pdev))
+ err = pci_enable_sriov(pdev, max_vfs);
+ else /* do nothing if change max_vfs number */
+ err = -EINVAL;
+
+ return err ? err : count;
+}
+
+static DEVICE_ATTR(max_vfs, S_IRUGO | S_IWUSR, show_max_vfs, store_max_vfs);
+static struct attribute *dev_attrs[] = {
+ &dev_attr_max_vfs.attr,
+ NULL,
+};
+
+static const struct attribute_group dev_attr_grp = {
+ .attrs = dev_attrs,
+};
+
+static inline int
+pci_lock(struct pci_dev * pdev)
+{
+ /* Some function names changes between 3.2.0 and 3.3.0... */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,3,0)
+ pci_block_user_cfg_access(pdev);
+ return 1;
+#else
+ return pci_cfg_access_trylock(pdev);
+#endif
+}
+
+static inline void
+pci_unlock(struct pci_dev * pdev)
+{
+ /* Some function names changes between 3.2.0 and 3.3.0... */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,3,0)
+ pci_unblock_user_cfg_access(pdev);
+#else
+ pci_cfg_access_unlock(pdev);
+#endif
+}
+
/**
* It masks the msix on/off of generating MSI-X messages.
*/
struct pci_dev *pdev = udev->pdev;
spin_lock_irqsave(&udev->lock, flags);
- PCI_LOCK(pdev);
+ if (!pci_lock(pdev)) {
+ spin_unlock_irqrestore(&udev->lock, flags);
+ return -1;
+ }
igbuio_set_interrupt_mask(udev, irq_state);
- PCI_UNLOCK(pdev);
+ pci_unlock(pdev);
spin_unlock_irqrestore(&udev->lock, flags);
return 0;
spin_lock_irqsave(&udev->lock, flags);
/* block userspace PCI config reads/writes */
- PCI_LOCK(pdev);
+ if (!pci_lock(pdev))
+ goto spin_unlock;
/* for legacy mode, interrupt maybe shared */
if (udev->mode == IGBUIO_LEGACY_INTR_MODE) {
ret = IRQ_HANDLED;
done:
/* unblock userspace PCI config reads/writes */
- PCI_UNLOCK(pdev);
+ pci_unlock(pdev);
+spin_unlock:
spin_unlock_irqrestore(&udev->lock, flags);
printk(KERN_INFO "irq 0x%x %s\n", irq, (ret == IRQ_HANDLED) ? "handled" : "not handled");
unsigned long addr, len;
void *internal_addr;
+ if (sizeof(info->mem) / sizeof (info->mem[0]) <= n)
+ return (EINVAL);
+
addr = pci_resource_start(dev, pci_bar);
len = pci_resource_len(dev, pci_bar);
if (addr == 0 || len == 0)
return 0;
}
+/* Get pci port io resources described by bar #pci_bar in uio resource n. */
+static int
+igbuio_pci_setup_ioport(struct pci_dev *dev, struct uio_info *info,
+ int n, int pci_bar, const char *name)
+{
+ unsigned long addr, len;
+
+ if (sizeof(info->port) / sizeof (info->port[0]) <= n)
+ return (EINVAL);
+
+ addr = pci_resource_start(dev, pci_bar);
+ len = pci_resource_len(dev, pci_bar);
+ if (addr == 0 || len == 0)
+ return (-1);
+
+ info->port[n].name = name;
+ info->port[n].start = addr;
+ info->port[n].size = len;
+ info->port[n].porttype = UIO_PORT_X86;
+
+ return (0);
+}
+
/* Unmap previously ioremap'd resources */
static void
igbuio_pci_release_iomem(struct uio_info *info)
}
}
+static int
+igbuio_setup_bars(struct pci_dev *dev, struct uio_info *info)
+{
+ int i, iom, iop, ret;
+ unsigned long flags;
+ static const char *bar_names[PCI_STD_RESOURCE_END + 1] = {
+ "BAR0",
+ "BAR1",
+ "BAR2",
+ "BAR3",
+ "BAR4",
+ "BAR5",
+ };
+
+ iom = 0;
+ iop = 0;
+
+ for (i = 0; i != sizeof(bar_names) / sizeof(bar_names[0]); i++) {
+ if (pci_resource_len(dev, i) != 0 &&
+ pci_resource_start(dev, i) != 0) {
+ flags = pci_resource_flags(dev, i);
+ if (flags & IORESOURCE_MEM) {
+ if ((ret = igbuio_pci_setup_iomem(dev, info,
+ iom, i, bar_names[i])) != 0)
+ return (ret);
+ iom++;
+ } else if (flags & IORESOURCE_IO) {
+ if ((ret = igbuio_pci_setup_ioport(dev, info,
+ iop, i, bar_names[i])) != 0)
+ return (ret);
+ iop++;
+ }
+ }
+ }
+
+ return ((iom != 0) ? ret : ENOENT);
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0)
static int __devinit
+#else
+static int
+#endif
igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
struct rte_uio_pci_dev *udev;
goto fail_free;
}
- /* XXX should we use 64 bits ? */
- /* set 32-bit DMA mask */
- if (pci_set_dma_mask(dev,(uint64_t)0xffffffff)) {
- printk(KERN_ERR "Cannot set DMA mask\n");
- goto fail_disable;
- }
-
/*
* reserve device's PCI memory regions for use by this
* module
pci_set_master(dev);
/* remap IO memory */
- if (igbuio_pci_setup_iomem(dev, &udev->info, 0, 0, "config"))
- goto fail_release_regions;
+ if (igbuio_setup_bars(dev, &udev->info))
+ goto fail_release_iomem;
+
+ /* set 64-bit DMA mask */
+ if (pci_set_dma_mask(dev, DMA_BIT_MASK(64))) {
+ printk(KERN_ERR "Cannot set DMA mask\n");
+ goto fail_release_iomem;
+ } else if (pci_set_consistent_dma_mask(dev, DMA_BIT_MASK(64))) {
+ printk(KERN_ERR "Cannot set consistent DMA mask\n");
+ goto fail_release_iomem;
+ }
/* fill uio infos */
udev->info.name = "Intel IGB UIO";
pci_set_drvdata(dev, udev);
igbuio_pci_irqcontrol(&udev->info, 0);
+ if (sysfs_create_group(&dev->dev.kobj, &dev_attr_grp))
+ goto fail_release_iomem;
+
/* register uio driver */
if (uio_register_device(&dev->dev, &udev->info))
goto fail_release_iomem;
return 0;
fail_release_iomem:
+ sysfs_remove_group(&dev->dev.kobj, &dev_attr_grp);
igbuio_pci_release_iomem(&udev->info);
if (udev->mode == IGBUIO_MSIX_INTR_MODE)
pci_disable_msix(udev->pdev);
-fail_release_regions:
pci_release_regions(dev);
fail_disable:
pci_disable_device(dev);
{
struct uio_info *info = pci_get_drvdata(dev);
+ if (info->priv == NULL) {
+ printk(KERN_DEBUG "Not igbuio device\n");
+ return;
+ }
+
+ sysfs_remove_group(&dev->dev.kobj, &dev_attr_grp);
uio_unregister_device(info);
- if (((struct rte_uio_pci_dev *)info->priv)->mode == IGBUIO_MSIX_INTR_MODE)
+ igbuio_pci_release_iomem(info);
+ if (((struct rte_uio_pci_dev *)info->priv)->mode ==
+ IGBUIO_MSIX_INTR_MODE)
pci_disable_msix(dev);
pci_release_regions(dev);
pci_disable_device(dev);
kfree(info);
}
+static int
+igbuio_config_intr_mode(char *intr_str)
+{
+ if (!intr_str) {
+ printk(KERN_INFO "Use MSIX interrupt by default\n");
+ return 0;
+ }
+
+ if (!strcmp(intr_str, "msix")) {
+ igbuio_intr_mode_preferred = IGBUIO_MSIX_INTR_MODE;
+ printk(KERN_INFO "Use MSIX interrupt\n");
+ } else if (!strcmp(intr_str, "legacy")) {
+ igbuio_intr_mode_preferred = IGBUIO_LEGACY_INTR_MODE;
+ printk(KERN_INFO "Use legacy interrupt\n");
+ } else {
+ printk(KERN_INFO "Error: bad parameter - %s\n", intr_str);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static struct pci_driver igbuio_pci_driver = {
.name = "igb_uio",
.id_table = igbuio_pci_ids,
static int __init
igbuio_pci_init_module(void)
{
+ int ret;
+
+ ret = igbuio_config_intr_mode(intr_mode);
+ if (ret < 0)
+ return ret;
+
return pci_register_driver(&igbuio_pci_driver);
}
module_init(igbuio_pci_init_module);
module_exit(igbuio_pci_exit_module);
+module_param(intr_mode, charp, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(intr_mode,
+"igb_uio interrupt mode (default=msix):\n"
+" msix Use MSIX interrupt\n"
+" legacy Use Legacy interrupt\n"
+"\n");
+
MODULE_DESCRIPTION("UIO driver for Intel IGB PCI cards");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Intel Corporation");
git.droids-corp.org / dpdk.git / blobdiff