#include "compat.h"
-#ifdef RTE_PCI_CONFIG
-#define PCI_SYS_FILE_BUF_SIZE 10
-#define PCI_DEV_CAP_REG 0xA4
-#define PCI_DEV_CTRL_REG 0xA8
-#define PCI_DEV_CAP_EXT_TAG_MASK 0x20
-#define PCI_DEV_CTRL_EXT_TAG_SHIFT 8
-#define PCI_DEV_CTRL_EXT_TAG_MASK (1 << PCI_DEV_CTRL_EXT_TAG_SHIFT)
-#endif
-
/**
* A structure describing the private information for a uio device.
*/
enum rte_intr_mode mode;
};
-static char *intr_mode = NULL;
+static char *intr_mode;
static enum rte_intr_mode igbuio_intr_mode_preferred = RTE_INTR_MODE_MSIX;
/* sriov sysfs */
return err ? err : count;
}
-#ifdef RTE_PCI_CONFIG
-static ssize_t
-show_extended_tag(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct pci_dev *pci_dev = to_pci_dev(dev);
- uint32_t val = 0;
-
- pci_read_config_dword(pci_dev, PCI_DEV_CAP_REG, &val);
- if (!(val & PCI_DEV_CAP_EXT_TAG_MASK)) /* Not supported */
- return snprintf(buf, PCI_SYS_FILE_BUF_SIZE, "%s\n", "invalid");
-
- val = 0;
- pci_bus_read_config_dword(pci_dev->bus, pci_dev->devfn,
- PCI_DEV_CTRL_REG, &val);
-
- return snprintf(buf, PCI_SYS_FILE_BUF_SIZE, "%s\n",
- (val & PCI_DEV_CTRL_EXT_TAG_MASK) ? "on" : "off");
-}
-
-static ssize_t
-store_extended_tag(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t count)
-{
- struct pci_dev *pci_dev = to_pci_dev(dev);
- uint32_t val = 0, enable;
-
- if (strncmp(buf, "on", 2) == 0)
- enable = 1;
- else if (strncmp(buf, "off", 3) == 0)
- enable = 0;
- else
- return -EINVAL;
-
- pci_cfg_access_lock(pci_dev);
- pci_bus_read_config_dword(pci_dev->bus, pci_dev->devfn,
- PCI_DEV_CAP_REG, &val);
- if (!(val & PCI_DEV_CAP_EXT_TAG_MASK)) { /* Not supported */
- pci_cfg_access_unlock(pci_dev);
- return -EPERM;
- }
-
- val = 0;
- pci_bus_read_config_dword(pci_dev->bus, pci_dev->devfn,
- PCI_DEV_CTRL_REG, &val);
- if (enable)
- val |= PCI_DEV_CTRL_EXT_TAG_MASK;
- else
- val &= ~PCI_DEV_CTRL_EXT_TAG_MASK;
- pci_bus_write_config_dword(pci_dev->bus, pci_dev->devfn,
- PCI_DEV_CTRL_REG, val);
- pci_cfg_access_unlock(pci_dev);
-
- return count;
-}
-
-static ssize_t
-show_max_read_request_size(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct pci_dev *pci_dev = to_pci_dev(dev);
- int val = pcie_get_readrq(pci_dev);
-
- return snprintf(buf, PCI_SYS_FILE_BUF_SIZE, "%d\n", val);
-}
-
-static ssize_t
-store_max_read_request_size(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t count)
-{
- struct pci_dev *pci_dev = to_pci_dev(dev);
- unsigned long size = 0;
- int ret;
-
- if (0 != kstrtoul(buf, 0, &size))
- return -EINVAL;
-
- ret = pcie_set_readrq(pci_dev, (int)size);
- if (ret < 0)
- return ret;
-
- return count;
-}
-#endif
-
static DEVICE_ATTR(max_vfs, S_IRUGO | S_IWUSR, show_max_vfs, store_max_vfs);
-#ifdef RTE_PCI_CONFIG
-static DEVICE_ATTR(extended_tag, S_IRUGO | S_IWUSR, show_extended_tag,
- store_extended_tag);
-static DEVICE_ATTR(max_read_request_size, S_IRUGO | S_IWUSR,
- show_max_read_request_size, store_max_read_request_size);
-#endif
static struct attribute *dev_attrs[] = {
&dev_attr_max_vfs.attr,
-#ifdef RTE_PCI_CONFIG
- &dev_attr_extended_tag.attr,
- &dev_attr_max_read_request_size.attr,
-#endif
NULL,
};
return IRQ_HANDLED;
}
+/**
+ * This gets called while opening uio device file.
+ */
+static int
+igbuio_pci_open(struct uio_info *info, struct inode *inode)
+{
+ struct rte_uio_pci_dev *udev = info->priv;
+ struct pci_dev *dev = udev->pdev;
+
+ pci_reset_function(dev);
+
+ /* set bus master, which was cleared by the reset function */
+ pci_set_master(dev);
+
+ return 0;
+}
+
+static int
+igbuio_pci_release(struct uio_info *info, struct inode *inode)
+{
+ struct rte_uio_pci_dev *udev = info->priv;
+ struct pci_dev *dev = udev->pdev;
+
+ /* stop the device from further DMA */
+ pci_clear_master(dev);
+
+ pci_reset_function(dev);
+
+ return 0;
+}
+
#ifdef CONFIG_XEN_DOM0
static int
igbuio_dom0_mmap_phys(struct uio_info *info, struct vm_area_struct *vma)
unsigned long addr, len;
void *internal_addr;
- if (sizeof(info->mem) / sizeof(info->mem[0]) <= n)
+ if (n >= ARRAY_SIZE(info->mem))
return -EINVAL;
addr = pci_resource_start(dev, pci_bar);
{
unsigned long addr, len;
- if (sizeof(info->port) / sizeof(info->port[0]) <= n)
+ if (n >= ARRAY_SIZE(info->port))
return -EINVAL;
addr = pci_resource_start(dev, pci_bar);
iom = 0;
iop = 0;
- for (i = 0; i != sizeof(bar_names) / sizeof(bar_names[0]); i++) {
+ for (i = 0; i < ARRAY_SIZE(bar_names); i++) {
if (pci_resource_len(dev, i) != 0 &&
pci_resource_start(dev, i) != 0) {
flags = pci_resource_flags(dev, i);
}
}
- return (iom != 0) ? ret : -ENOENT;
+ return (iom != 0 || iop != 0) ? ret : -ENOENT;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 8, 0)
igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
struct rte_uio_pci_dev *udev;
+#ifdef HAVE_PCI_ENABLE_MSIX
struct msix_entry msix_entry;
+#endif
+ dma_addr_t map_dma_addr;
+ void *map_addr;
int err;
udev = kzalloc(sizeof(struct rte_uio_pci_dev), GFP_KERNEL);
goto fail_free;
}
- /*
- * reserve device's PCI memory regions for use by this
- * module
- */
- err = pci_request_regions(dev, "igb_uio");
- if (err != 0) {
- dev_err(&dev->dev, "Cannot request regions\n");
- goto fail_disable;
- }
-
/* enable bus mastering on the device */
pci_set_master(dev);
udev->info.version = "0.1";
udev->info.handler = igbuio_pci_irqhandler;
udev->info.irqcontrol = igbuio_pci_irqcontrol;
+ udev->info.open = igbuio_pci_open;
+ udev->info.release = igbuio_pci_release;
#ifdef CONFIG_XEN_DOM0
/* check if the driver run on Xen Dom0 */
if (xen_initial_domain())
switch (igbuio_intr_mode_preferred) {
case RTE_INTR_MODE_MSIX:
/* Only 1 msi-x vector needed */
+#ifdef HAVE_PCI_ENABLE_MSIX
msix_entry.entry = 0;
if (pci_enable_msix(dev, &msix_entry, 1) == 0) {
dev_dbg(&dev->dev, "using MSI-X");
+ udev->info.irq_flags = IRQF_NO_THREAD;
udev->info.irq = msix_entry.vector;
udev->mode = RTE_INTR_MODE_MSIX;
break;
}
+#else
+ if (pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_MSIX) == 1) {
+ dev_dbg(&dev->dev, "using MSI-X");
+ udev->info.irq = pci_irq_vector(dev, 0);
+ udev->mode = RTE_INTR_MODE_MSIX;
+ break;
+ }
+#endif
/* fall back to INTX */
case RTE_INTR_MODE_LEGACY:
if (pci_intx_mask_supported(dev)) {
dev_dbg(&dev->dev, "using INTX");
- udev->info.irq_flags = IRQF_SHARED;
+ udev->info.irq_flags = IRQF_SHARED | IRQF_NO_THREAD;
udev->info.irq = dev->irq;
udev->mode = RTE_INTR_MODE_LEGACY;
break;
dev_info(&dev->dev, "uio device registered with irq %lx\n",
udev->info.irq);
+ /*
+ * Doing a harmless dma mapping for attaching the device to
+ * the iommu identity mapping if kernel boots with iommu=pt.
+ * Note this is not a problem if no IOMMU at all.
+ */
+ map_addr = dma_alloc_coherent(&dev->dev, 1024, &map_dma_addr,
+ GFP_KERNEL);
+ if (map_addr)
+ memset(map_addr, 0, 1024);
+
+ if (!map_addr)
+ dev_info(&dev->dev, "dma mapping failed\n");
+ else {
+ dev_info(&dev->dev, "mapping 1K dma=%#llx host=%p\n",
+ (unsigned long long)map_dma_addr, map_addr);
+
+ dma_free_coherent(&dev->dev, 1024, map_addr, map_dma_addr);
+ dev_info(&dev->dev, "unmapping 1K dma=%#llx host=%p\n",
+ (unsigned long long)map_dma_addr, map_addr);
+ }
+
return 0;
fail_remove_group:
igbuio_pci_release_iomem(&udev->info);
if (udev->mode == RTE_INTR_MODE_MSIX)
pci_disable_msix(udev->pdev);
- pci_release_regions(dev);
-fail_disable:
pci_disable_device(dev);
fail_free:
kfree(udev);
static void
igbuio_pci_remove(struct pci_dev *dev)
{
- struct uio_info *info = pci_get_drvdata(dev);
- struct rte_uio_pci_dev *udev;
-
- if (info->priv == NULL) {
- pr_notice("Not igbuio device\n");
- return;
- }
- udev = info->priv;
+ struct rte_uio_pci_dev *udev = pci_get_drvdata(dev);
sysfs_remove_group(&dev->dev.kobj, &dev_attr_grp);
- uio_unregister_device(info);
- igbuio_pci_release_iomem(info);
+ uio_unregister_device(&udev->info);
+ igbuio_pci_release_iomem(&udev->info);
if (udev->mode == RTE_INTR_MODE_MSIX)
pci_disable_msix(dev);
- pci_release_regions(dev);
pci_disable_device(dev);
pci_set_drvdata(dev, NULL);
- kfree(info);
+ kfree(udev);
}
static int
git.droids-corp.org / dpdk.git / blobdiff