#include <linux/io.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"
+
#ifdef RTE_PCI_CONFIG
#define PCI_SYS_FILE_BUF_SIZE 10
#define PCI_DEV_CAP_REG 0xA4
struct rte_uio_pci_dev {
struct uio_info info;
struct pci_dev *pdev;
- spinlock_t lock; /* spinlock for accessing PCI config space or msix data in multi tasks/isr */
enum rte_intr_mode mode;
};
}
/* sriov sysfs */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34)
-static int pci_num_vf(struct pci_dev *dev)
- 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;
-}
-#endif
-
static ssize_t
show_max_vfs(struct device *dev, struct device_attribute *attr,
char *buf)
unsigned long max_vfs;
struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
- if (0 != strict_strtoul(buf, 0, &max_vfs))
+ if (0 != kstrtoul(buf, 0, &max_vfs))
return -EINVAL;
if (0 == max_vfs)
unsigned long size = 0;
int ret;
- if (strict_strtoul(buf, 0, &size) != 0)
+ if (0 != kstrtoul(buf, 0, &size))
return -EINVAL;
ret = pcie_set_readrq(pci_dev, (int)size);
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.
*/
-static int
+static void
igbuio_msix_mask_irq(struct msi_desc *desc, int32_t state)
{
- uint32_t mask_bits = desc->masked;
+ u32 mask_bits = desc->masked;
unsigned offset = desc->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE +
PCI_MSIX_ENTRY_VECTOR_CTRL;
readl(desc->mask_base);
desc->masked = mask_bits;
}
-
- return 0;
-}
-
-/**
- * This function sets/clears the masks for generating LSC interrupts.
- *
- * @param info
- * The pointer to struct uio_info.
- * @param on
- * The on/off flag of masking LSC.
- * @return
- * -On success, zero value.
- * -On failure, a negative value.
- */
-static int
-igbuio_set_interrupt_mask(struct rte_uio_pci_dev *udev, int32_t state)
-{
- struct pci_dev *pdev = udev->pdev;
-
- if (udev->mode == RTE_INTR_MODE_MSIX) {
- struct msi_desc *desc;
-
- list_for_each_entry(desc, &pdev->msi_list, list) {
- igbuio_msix_mask_irq(desc, state);
- }
- } else if (udev->mode == RTE_INTR_MODE_LEGACY) {
- uint32_t status;
- uint16_t old, new;
-
- pci_read_config_dword(pdev, PCI_COMMAND, &status);
- old = status;
- if (state != 0)
- new = old & (~PCI_COMMAND_INTX_DISABLE);
- else
- new = old | PCI_COMMAND_INTX_DISABLE;
-
- if (old != new)
- pci_write_config_word(pdev, PCI_COMMAND, new);
- }
-
- return 0;
}
/**
static int
igbuio_pci_irqcontrol(struct uio_info *info, s32 irq_state)
{
- unsigned long flags;
struct rte_uio_pci_dev *udev = igbuio_get_uio_pci_dev(info);
struct pci_dev *pdev = udev->pdev;
- spin_lock_irqsave(&udev->lock, flags);
- if (!pci_lock(pdev)) {
- spin_unlock_irqrestore(&udev->lock, flags);
- return -1;
- }
+ pci_cfg_access_lock(pdev);
+ if (udev->mode == RTE_INTR_MODE_LEGACY)
+ pci_intx(pdev, !!irq_state);
- igbuio_set_interrupt_mask(udev, irq_state);
+ else if (udev->mode == RTE_INTR_MODE_MSIX) {
+ struct msi_desc *desc;
- pci_unlock(pdev);
- spin_unlock_irqrestore(&udev->lock, flags);
+ list_for_each_entry(desc, &pdev->msi_list, list)
+ igbuio_msix_mask_irq(desc, irq_state);
+ }
+ pci_cfg_access_unlock(pdev);
return 0;
}
static irqreturn_t
igbuio_pci_irqhandler(int irq, struct uio_info *info)
{
- irqreturn_t ret = IRQ_NONE;
- unsigned long flags;
struct rte_uio_pci_dev *udev = igbuio_get_uio_pci_dev(info);
- struct pci_dev *pdev = udev->pdev;
- uint32_t cmd_status_dword;
- uint16_t status;
-
- spin_lock_irqsave(&udev->lock, flags);
- /* block userspace PCI config reads/writes */
- if (!pci_lock(pdev))
- goto spin_unlock;
-
- /* for legacy mode, interrupt maybe shared */
- if (udev->mode == RTE_INTR_MODE_LEGACY) {
- pci_read_config_dword(pdev, PCI_COMMAND, &cmd_status_dword);
- status = cmd_status_dword >> 16;
- /* interrupt is not ours, goes to out */
- if (!(status & PCI_STATUS_INTERRUPT))
- goto done;
- }
- igbuio_set_interrupt_mask(udev, 0);
- ret = IRQ_HANDLED;
-done:
- /* unblock userspace PCI config reads/writes */
- pci_unlock(pdev);
-spin_unlock:
- spin_unlock_irqrestore(&udev->lock, flags);
- pr_info("irq 0x%x %s\n", irq, (ret == IRQ_HANDLED) ? "handled" : "not handled");
+ /* Legacy mode need to mask in hardware */
+ if (udev->mode == RTE_INTR_MODE_LEGACY &&
+ !pci_check_and_mask_intx(udev->pdev))
+ return IRQ_NONE;
- return ret;
+ /* Message signal mode, no share IRQ and automasked */
+ return IRQ_HANDLED;
}
#ifdef CONFIG_XEN_DOM0
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,
#endif
udev->info.priv = udev;
udev->pdev = dev;
- udev->mode = RTE_INTR_MODE_LEGACY;
- spin_lock_init(&udev->lock);
- /* check if it need to try msix first */
- if (igbuio_intr_mode_preferred == RTE_INTR_MODE_MSIX) {
+ switch (igbuio_intr_mode_preferred) {
+ case RTE_INTR_MODE_MSIX:
/* Only 1 msi-x vector needed */
msix_entry.entry = 0;
if (pci_enable_msix(dev, &msix_entry, 1) == 0) {
dev_dbg(&dev->dev, "using MSI-X");
+ udev->info.irq = msix_entry.vector;
udev->mode = RTE_INTR_MODE_MSIX;
+ break;
}
- else {
- pci_disable_msix(udev->pdev);
- pr_info("fail to enable pci msix, or not enough msix entries\n");
- }
- }
- switch (udev->mode) {
- case RTE_INTR_MODE_MSIX:
- udev->info.irq_flags = 0;
- udev->info.irq = msix_entry.vector;
- break;
- case RTE_INTR_MODE_MSI:
- break;
+ /* fall back to INTX */
case RTE_INTR_MODE_LEGACY:
- udev->info.irq_flags = IRQF_SHARED;
- udev->info.irq = dev->irq;
+ if (pci_intx_mask_supported(dev)) {
+ dev_dbg(&dev->dev, "using INTX");
+ udev->info.irq_flags = IRQF_SHARED;
+ 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:
- break;
+ dev_err(&dev->dev, "invalid IRQ mode %u",
+ igbuio_intr_mode_preferred);
+ err = -EINVAL;
+ goto fail_release_iomem;
}
- pci_set_drvdata(dev, udev);
- igbuio_pci_irqcontrol(&udev->info, 0);
-
err = sysfs_create_group(&dev->dev.kobj, &dev_attr_grp);
if (err != 0)
goto fail_release_iomem;
if (err != 0)
goto fail_remove_group;
- pr_info("uio device registered with irq %lx\n", udev->info.irq);
+ pci_set_drvdata(dev, udev);
+
+ dev_info(&dev->dev, "uio device registered with irq %lx\n",
+ udev->info.irq);
return 0;
git.droids-corp.org / dpdk.git / blobdiff