#include <linux/pci.h>
#include <linux/uio_driver.h>
#include <linux/io.h>
+#include <linux/irq.h>
#include <linux/msi.h>
#include <linux/version.h>
#include <linux/slab.h>
-#ifdef CONFIG_XEN_DOM0
-#include <xen/xen.h>
-#endif
#include <rte_pci_dev_features.h>
#include "compat.h"
static char *intr_mode;
static enum rte_intr_mode igbuio_intr_mode_preferred = RTE_INTR_MODE_MSIX;
-
/* sriov sysfs */
static ssize_t
show_max_vfs(struct device *dev, struct device_attribute *attr,
static const struct attribute_group dev_attr_grp = {
.attrs = dev_attrs,
};
+
+#ifndef HAVE_PCI_MSI_MASK_IRQ
/*
* It masks the msix on/off of generating MSI-X messages.
*/
static void
-igbuio_msix_mask_irq(struct msi_desc *desc, int32_t state)
+igbuio_msix_mask_irq(struct msi_desc *desc, s32 state)
{
u32 mask_bits = desc->masked;
- unsigned offset = desc->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE +
+ unsigned int offset = desc->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE +
PCI_MSIX_ENTRY_VECTOR_CTRL;
if (state != 0)
}
}
+/*
+ * It masks the msi on/off of generating MSI messages.
+ */
+static void
+igbuio_msi_mask_irq(struct pci_dev *pdev, struct msi_desc *desc, int32_t state)
+{
+ u32 mask_bits = desc->masked;
+ u32 offset = desc->irq - pdev->irq;
+ u32 mask = 1 << offset;
+
+ if (!desc->msi_attrib.maskbit)
+ return;
+
+ if (state != 0)
+ mask_bits &= ~mask;
+ else
+ mask_bits |= mask;
+
+ if (mask_bits != desc->masked) {
+ pci_write_config_dword(pdev, desc->mask_pos, mask_bits);
+ desc->masked = mask_bits;
+ }
+}
+
+static void
+igbuio_mask_irq(struct pci_dev *pdev, enum rte_intr_mode mode, s32 irq_state)
+{
+ struct msi_desc *desc;
+ struct list_head *msi_list;
+
+#ifdef HAVE_MSI_LIST_IN_GENERIC_DEVICE
+ msi_list = &pdev->dev.msi_list;
+#else
+ msi_list = &pdev->msi_list;
+#endif
+
+ if (mode == RTE_INTR_MODE_MSIX) {
+ list_for_each_entry(desc, msi_list, list)
+ igbuio_msix_mask_irq(desc, irq_state);
+ } else if (mode == RTE_INTR_MODE_MSI) {
+ list_for_each_entry(desc, msi_list, list)
+ igbuio_msi_mask_irq(pdev, desc, irq_state);
+ }
+}
+#endif
+
/**
* This is the irqcontrol callback to be registered to uio_info.
* It can be used to disable/enable interrupt from user space processes.
struct rte_uio_pci_dev *udev = info->priv;
struct pci_dev *pdev = udev->pdev;
- pci_cfg_access_lock(pdev);
- if (udev->mode == RTE_INTR_MODE_LEGACY)
- pci_intx(pdev, !!irq_state);
+#ifdef HAVE_PCI_MSI_MASK_IRQ
+ struct irq_data *irq = irq_get_irq_data(udev->info.irq);
+#endif
- else if (udev->mode == RTE_INTR_MODE_MSIX) {
- struct msi_desc *desc;
+ pci_cfg_access_lock(pdev);
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0))
- list_for_each_entry(desc, &pdev->msi_list, list)
- igbuio_msix_mask_irq(desc, irq_state);
+ if (udev->mode == RTE_INTR_MODE_MSIX || udev->mode == RTE_INTR_MODE_MSI) {
+#ifdef HAVE_PCI_MSI_MASK_IRQ
+ if (irq_state == 1)
+ pci_msi_unmask_irq(irq);
+ else
+ pci_msi_mask_irq(irq);
#else
- list_for_each_entry(desc, &pdev->dev.msi_list, list)
- igbuio_msix_mask_irq(desc, irq_state);
+ igbuio_mask_irq(pdev, udev->mode, irq_state);
#endif
}
+
+ if (udev->mode == RTE_INTR_MODE_LEGACY)
+ pci_intx(pdev, !!irq_state);
+
pci_cfg_access_unlock(pdev);
return 0;
* If yes, disable it here and will be enable later.
*/
static irqreturn_t
-igbuio_pci_irqhandler(int irq, struct uio_info *info)
+igbuio_pci_irqhandler(int irq, void *dev_id)
{
- struct rte_uio_pci_dev *udev = info->priv;
+ struct rte_uio_pci_dev *udev = (struct rte_uio_pci_dev *)dev_id;
+ struct uio_info *info = &udev->info;
/* Legacy mode need to mask in hardware */
if (udev->mode == RTE_INTR_MODE_LEGACY &&
!pci_check_and_mask_intx(udev->pdev))
return IRQ_NONE;
+ uio_event_notify(info);
+
/* Message signal mode, no share IRQ and automasked */
return IRQ_HANDLED;
}
+static int
+igbuio_pci_enable_interrupts(struct rte_uio_pci_dev *udev)
+{
+ int err = 0;
+#ifndef HAVE_ALLOC_IRQ_VECTORS
+ struct msix_entry msix_entry;
+#endif
+
+ switch (igbuio_intr_mode_preferred) {
+ case RTE_INTR_MODE_MSIX:
+ /* Only 1 msi-x vector needed */
+#ifndef HAVE_ALLOC_IRQ_VECTORS
+ msix_entry.entry = 0;
+ if (pci_enable_msix(udev->pdev, &msix_entry, 1) == 0) {
+ dev_dbg(&udev->pdev->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(udev->pdev, 1, 1, PCI_IRQ_MSIX) == 1) {
+ dev_dbg(&udev->pdev->dev, "using MSI-X");
+ udev->info.irq_flags = IRQF_NO_THREAD;
+ udev->info.irq = pci_irq_vector(udev->pdev, 0);
+ udev->mode = RTE_INTR_MODE_MSIX;
+ break;
+ }
+#endif
+
+ /* fall back to MSI */
+ case RTE_INTR_MODE_MSI:
+#ifndef HAVE_ALLOC_IRQ_VECTORS
+ if (pci_enable_msi(udev->pdev) == 0) {
+ dev_dbg(&udev->pdev->dev, "using MSI");
+ udev->info.irq_flags = IRQF_NO_THREAD;
+ udev->info.irq = udev->pdev->irq;
+ udev->mode = RTE_INTR_MODE_MSI;
+ break;
+ }
+#else
+ if (pci_alloc_irq_vectors(udev->pdev, 1, 1, PCI_IRQ_MSI) == 1) {
+ dev_dbg(&udev->pdev->dev, "using MSI");
+ udev->info.irq_flags = IRQF_NO_THREAD;
+ udev->info.irq = pci_irq_vector(udev->pdev, 0);
+ udev->mode = RTE_INTR_MODE_MSI;
+ break;
+ }
+#endif
+ /* fall back to INTX */
+ case RTE_INTR_MODE_LEGACY:
+ if (pci_intx_mask_supported(udev->pdev)) {
+ dev_dbg(&udev->pdev->dev, "using INTX");
+ udev->info.irq_flags = IRQF_SHARED | IRQF_NO_THREAD;
+ udev->info.irq = udev->pdev->irq;
+ udev->mode = RTE_INTR_MODE_LEGACY;
+ break;
+ }
+ dev_notice(&udev->pdev->dev, "PCI INTX mask not supported\n");
+ /* fall back to no IRQ */
+ case RTE_INTR_MODE_NONE:
+ udev->mode = RTE_INTR_MODE_NONE;
+ udev->info.irq = UIO_IRQ_NONE;
+ break;
+
+ default:
+ dev_err(&udev->pdev->dev, "invalid IRQ mode %u",
+ igbuio_intr_mode_preferred);
+ udev->info.irq = UIO_IRQ_NONE;
+ err = -EINVAL;
+ }
+
+ if (udev->info.irq != UIO_IRQ_NONE)
+ err = request_irq(udev->info.irq, igbuio_pci_irqhandler,
+ udev->info.irq_flags, udev->info.name,
+ udev);
+ dev_info(&udev->pdev->dev, "uio device registered with irq %lx\n",
+ udev->info.irq);
+
+ return err;
+}
+
+static void
+igbuio_pci_disable_interrupts(struct rte_uio_pci_dev *udev)
+{
+ if (udev->info.irq) {
+ free_irq(udev->info.irq, udev);
+ udev->info.irq = 0;
+ }
+
+#ifndef HAVE_ALLOC_IRQ_VECTORS
+ if (udev->mode == RTE_INTR_MODE_MSIX)
+ pci_disable_msix(udev->pdev);
+ if (udev->mode == RTE_INTR_MODE_MSI)
+ pci_disable_msi(udev->pdev);
+#else
+ if (udev->mode == RTE_INTR_MODE_MSIX ||
+ udev->mode == RTE_INTR_MODE_MSI)
+ pci_free_irq_vectors(udev->pdev);
+#endif
+}
+
+
/**
* This gets called while opening uio device file.
*/
{
struct rte_uio_pci_dev *udev = info->priv;
struct pci_dev *dev = udev->pdev;
-
- pci_reset_function(dev);
+ int err;
/* set bus master, which was cleared by the reset function */
pci_set_master(dev);
+ /* enable interrupts */
+ err = igbuio_pci_enable_interrupts(udev);
+ if (err) {
+ dev_err(&dev->dev, "Enable interrupt fails\n");
+ return err;
+ }
return 0;
}
struct rte_uio_pci_dev *udev = info->priv;
struct pci_dev *dev = udev->pdev;
+ /* disable interrupts */
+ igbuio_pci_disable_interrupts(udev);
+
/* 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)
-{
- int idx;
-
- idx = (int)vma->vm_pgoff;
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-#ifdef HAVE_PTE_MASK_PAGE_IOMAP
- vma->vm_page_prot.pgprot |= _PAGE_IOMAP;
-#endif
-
- return remap_pfn_range(vma,
- vma->vm_start,
- info->mem[idx].addr >> PAGE_SHIFT,
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot);
-}
-
-/**
- * This is uio device mmap method which will use igbuio mmap for Xen
- * Dom0 environment.
- */
-static int
-igbuio_dom0_pci_mmap(struct uio_info *info, struct vm_area_struct *vma)
-{
- int idx;
-
- if (vma->vm_pgoff >= MAX_UIO_MAPS)
- return -EINVAL;
-
- if (info->mem[vma->vm_pgoff].size == 0)
- return -EINVAL;
-
- idx = (int)vma->vm_pgoff;
- switch (info->mem[idx].memtype) {
- case UIO_MEM_PHYS:
- return igbuio_dom0_mmap_phys(info, vma);
- case UIO_MEM_LOGICAL:
- case UIO_MEM_VIRTUAL:
- default:
- return -EINVAL;
- }
-}
-#endif
-
/* Remap pci resources described by bar #pci_bar in uio resource n. */
static int
igbuio_pci_setup_iomem(struct pci_dev *dev, struct uio_info *info,
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;
/* fill uio infos */
udev->info.name = "igb_uio";
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())
- udev->info.mmap = igbuio_dom0_pci_mmap;
-#endif
udev->info.priv = udev;
udev->pdev = dev;
- 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 | IRQF_NO_THREAD;
- udev->info.irq = dev->irq;
- udev->mode = RTE_INTR_MODE_LEGACY;
- break;
- }
- dev_notice(&dev->dev, "PCI INTX mask not supported\n");
- /* fall back to no IRQ */
- case RTE_INTR_MODE_NONE:
- udev->mode = RTE_INTR_MODE_NONE;
- udev->info.irq = 0;
- break;
-
- default:
- dev_err(&dev->dev, "invalid IRQ mode %u",
- igbuio_intr_mode_preferred);
- err = -EINVAL;
- goto fail_release_iomem;
- }
-
err = sysfs_create_group(&dev->dev.kobj, &dev_attr_grp);
if (err != 0)
goto fail_release_iomem;
pci_set_drvdata(dev, udev);
- 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.
sysfs_remove_group(&dev->dev.kobj, &dev_attr_grp);
fail_release_iomem:
igbuio_pci_release_iomem(&udev->info);
- if (udev->mode == RTE_INTR_MODE_MSIX)
- pci_disable_msix(udev->pdev);
pci_disable_device(dev);
fail_free:
kfree(udev);
sysfs_remove_group(&dev->dev.kobj, &dev_attr_grp);
uio_unregister_device(&udev->info);
igbuio_pci_release_iomem(&udev->info);
- if (udev->mode == RTE_INTR_MODE_MSIX)
- pci_disable_msix(dev);
pci_disable_device(dev);
pci_set_drvdata(dev, NULL);
kfree(udev);
if (!strcmp(intr_str, RTE_INTR_MODE_MSIX_NAME)) {
igbuio_intr_mode_preferred = RTE_INTR_MODE_MSIX;
pr_info("Use MSIX interrupt\n");
+ } else if (!strcmp(intr_str, RTE_INTR_MODE_MSI_NAME)) {
+ igbuio_intr_mode_preferred = RTE_INTR_MODE_MSI;
+ pr_info("Use MSI interrupt\n");
} else if (!strcmp(intr_str, RTE_INTR_MODE_LEGACY_NAME)) {
igbuio_intr_mode_preferred = RTE_INTR_MODE_LEGACY;
pr_info("Use legacy interrupt\n");
MODULE_PARM_DESC(intr_mode,
"igb_uio interrupt mode (default=msix):\n"
" " RTE_INTR_MODE_MSIX_NAME " Use MSIX interrupt\n"
+" " RTE_INTR_MODE_MSI_NAME " Use MSI interrupt\n"
" " RTE_INTR_MODE_LEGACY_NAME " Use Legacy interrupt\n"
"\n");
Code Review / deb_dpdk.git / blobdiff