X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_eal%2Flinuxapp%2Figb_uio%2Figb_uio.c;h=64ecd9153e410855d7af4b37408c9286c280f457;hb=e60f71ebd68f8b841bda43f210861e010ad5eb61;hp=51733f6822f60ec9a5c24207e853e8ea570c29d6;hpb=af75078fece3615088e561357c1e97603e43a5fe;p=dpdk.git diff --git a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c index 51733f6822..64ecd9153e 100644 --- a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c +++ b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c @@ -1,23 +1,26 @@ /*- - * - * Copyright (c) 2010-2012, Intel Corporation - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * 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 - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * - * GNU GPL V2: http://www.gnu.org/licenses/old-licenses/gpl-2.0.html - * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2010-2013 Intel Corporation. All rights reserved. + * + * 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 + * 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 + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * Contact Information: + * Intel Corporation + * */ #include @@ -28,15 +31,6 @@ #include #include -/* 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. @@ -72,21 +66,113 @@ struct rte_uio_pci_dev { 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)}, #include { 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. */ @@ -173,11 +259,14 @@ igbuio_pci_irqcontrol(struct uio_info *info, s32 irq_state) 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; @@ -199,7 +288,8 @@ igbuio_pci_irqhandler(int irq, struct uio_info *info) 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) { @@ -214,7 +304,8 @@ igbuio_pci_irqhandler(int irq, struct uio_info *info) 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"); @@ -229,6 +320,9 @@ igbuio_pci_setup_iomem(struct pci_dev *dev, struct uio_info *info, 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) @@ -244,6 +338,29 @@ igbuio_pci_setup_iomem(struct pci_dev *dev, struct uio_info *info, 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) @@ -255,7 +372,49 @@ 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; @@ -273,13 +432,6 @@ igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) 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 @@ -293,8 +445,17 @@ igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) 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"; @@ -339,6 +500,9 @@ igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) 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; @@ -348,10 +512,10 @@ igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) 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); @@ -366,8 +530,16 @@ igbuio_pci_remove(struct pci_dev *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); @@ -375,6 +547,28 @@ igbuio_pci_remove(struct pci_dev *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, @@ -385,6 +579,12 @@ static struct pci_driver igbuio_pci_driver = { 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); } @@ -397,6 +597,13 @@ igbuio_pci_exit_module(void) 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");