/*-
* GPL LICENSE SUMMARY
*
- * Copyright(c) 2010-2013 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/module.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/kthread.h>
+#include <linux/rwsem.h>
#include <exec-env/rte_kni_common.h>
#include "kni_dev.h"
unsigned long ioctl_param);
static int kni_compat_ioctl(struct inode *inode, unsigned int ioctl_num,
unsigned long ioctl_param);
+static int kni_dev_remove(struct kni_dev *dev);
+
+static int __init kni_parse_kthread_mode(void);
-/* kni kernel thread for rx */
-static int kni_thread(void *unused);
+/* KNI processing for single kernel thread mode */
+static int kni_thread_single(void *unused);
+/* KNI processing for multiple kernel thread mode */
+static int kni_thread_multiple(void *param);
static struct file_operations kni_fops = {
.owner = THIS_MODULE,
/* loopback mode */
static char *lo_mode = NULL;
-static struct kni_dev *kni_devs[KNI_MAX_DEVICES];
-static volatile int num_devs; /* number of kni devices */
+/* Kernel thread mode */
+static char *kthread_mode = NULL;
+static unsigned multiple_kthread_on = 0;
#define KNI_DEV_IN_USE_BIT_NUM 0 /* Bit number for device in use */
static volatile unsigned long device_in_use; /* device in use flag */
static struct task_struct *kni_kthread;
+/* kni list lock */
+static DECLARE_RWSEM(kni_list_lock);
+
+/* kni list */
+static struct list_head kni_list_head = LIST_HEAD_INIT(kni_list_head);
+
static int __init
kni_init(void)
{
KNI_PRINT("######## DPDK kni module loading ########\n");
+ if (kni_parse_kthread_mode() < 0) {
+ KNI_ERR("Invalid parameter for kthread_mode\n");
+ return -EINVAL;
+ }
+
if (misc_register(&kni_misc) != 0) {
KNI_ERR("Misc registration failed\n");
- return 1;
+ return -EPERM;
}
/* Clear the bit of device in use */
KNI_PRINT("####### DPDK kni module unloaded #######\n");
}
+static int __init
+kni_parse_kthread_mode(void)
+{
+ if (!kthread_mode)
+ return 0;
+
+ if (strcmp(kthread_mode, "single") == 0)
+ return 0;
+ else if (strcmp(kthread_mode, "multiple") == 0)
+ multiple_kthread_on = 1;
+ else
+ return -1;
+
+ return 0;
+}
+
static int
kni_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(KNI_DEV_IN_USE_BIT_NUM, &device_in_use))
return -EBUSY;
- memset(kni_devs, 0, sizeof(kni_devs));
- num_devs = 0;
-
- /* Create kernel thread for RX */
- kni_kthread = kthread_run(kni_thread, NULL, "kni_thread");
- if (IS_ERR(kni_kthread)) {
- KNI_ERR("Unable to create kernel threaed\n");
- return PTR_ERR(kni_kthread);
- }
+ /* Create kernel thread for single mode */
+ if (multiple_kthread_on == 0) {
+ KNI_PRINT("Single kernel thread for all KNI devices\n");
+ /* Create kernel thread for RX */
+ kni_kthread = kthread_run(kni_thread_single, NULL,
+ "kni_single");
+ if (IS_ERR(kni_kthread)) {
+ KNI_ERR("Unable to create kernel threaed\n");
+ return PTR_ERR(kni_kthread);
+ }
+ } else
+ KNI_PRINT("Multiple kernel thread mode enabled\n");
KNI_PRINT("/dev/kni opened\n");
static int
kni_release(struct inode *inode, struct file *file)
{
- int i;
-
- KNI_PRINT("Stopping KNI thread...");
+ struct kni_dev *dev, *n;
- /* Stop kernel thread */
- kthread_stop(kni_kthread);
- kni_kthread = NULL;
-
- for (i = 0; i < KNI_MAX_DEVICES; i++) {
- if (kni_devs[i] != NULL) {
- /* Call the remove part to restore pci dev */
- switch (kni_devs[i]->device_id) {
- #define RTE_PCI_DEV_ID_DECL_IGB(vend, dev) case (dev):
- #include <rte_pci_dev_ids.h>
- igb_kni_remove(kni_devs[i]->pci_dev);
- break;
- #define RTE_PCI_DEV_ID_DECL_IXGBE(vend, dev) case (dev):
- #include <rte_pci_dev_ids.h>
- ixgbe_kni_remove(kni_devs[i]->pci_dev);
- break;
- default:
- break;
- }
+ /* Stop kernel thread for single mode */
+ if (multiple_kthread_on == 0) {
+ /* Stop kernel thread */
+ kthread_stop(kni_kthread);
+ kni_kthread = NULL;
+ }
- unregister_netdev(kni_devs[i]->net_dev);
- free_netdev(kni_devs[i]->net_dev);
- kni_devs[i] = NULL;
+ down_write(&kni_list_lock);
+ list_for_each_entry_safe(dev, n, &kni_list_head, list) {
+ /* Stop kernel thread for multiple mode */
+ if (multiple_kthread_on && dev->pthread != NULL) {
+ kthread_stop(dev->pthread);
+ dev->pthread = NULL;
}
+
+#ifdef RTE_KNI_VHOST
+ kni_vhost_backend_release(dev);
+#endif
+ kni_dev_remove(dev);
+ list_del(&dev->list);
}
- num_devs = 0;
+ up_write(&kni_list_lock);
/* Clear the bit of device in use */
clear_bit(KNI_DEV_IN_USE_BIT_NUM, &device_in_use);
}
static int
-kni_thread(void *unused)
+kni_thread_single(void *unused)
{
- int i, j;
+ int j;
+ struct kni_dev *dev, *n;
- KNI_PRINT("Kernel thread for KNI started\n");
while (!kthread_should_stop()) {
- int n_devs = num_devs;
+ down_read(&kni_list_lock);
for (j = 0; j < KNI_RX_LOOP_NUM; j++) {
- for (i = 0; i < n_devs; i++) {
- /* This shouldn't be needed */
- if (kni_devs[i]) {
- kni_net_rx(kni_devs[i]);
- kni_net_poll_resp(kni_devs[i]);
- }
- else
- KNI_ERR("kni_thread -no kni found!!!");
+ list_for_each_entry_safe(dev, n,
+ &kni_list_head, list) {
+#ifdef RTE_KNI_VHOST
+ kni_chk_vhost_rx(dev);
+#else
+ kni_net_rx(dev);
+#endif
+ kni_net_poll_resp(dev);
}
}
+ up_read(&kni_list_lock);
/* reschedule out for a while */
schedule_timeout_interruptible(usecs_to_jiffies( \
KNI_KTHREAD_RESCHEDULE_INTERVAL));
}
- KNI_PRINT("Kernel thread for KNI stopped\n");
+
+ return 0;
+}
+
+static int
+kni_thread_multiple(void *param)
+{
+ int j;
+ struct kni_dev *dev = (struct kni_dev *)param;
+
+ while (!kthread_should_stop()) {
+ for (j = 0; j < KNI_RX_LOOP_NUM; j++) {
+#ifdef RTE_KNI_VHOST
+ kni_chk_vhost_rx(dev);
+#else
+ kni_net_rx(dev);
+#endif
+ kni_net_poll_resp(dev);
+ }
+ schedule_timeout_interruptible(usecs_to_jiffies( \
+ KNI_KTHREAD_RESCHEDULE_INTERVAL));
+ }
+
+ return 0;
+}
+
+static int
+kni_dev_remove(struct kni_dev *dev)
+{
+ if (!dev)
+ return -ENODEV;
+
+ switch (dev->device_id) {
+ #define RTE_PCI_DEV_ID_DECL_IGB(vend, dev) case (dev):
+ #include <rte_pci_dev_ids.h>
+ igb_kni_remove(dev->pci_dev);
+ break;
+ #define RTE_PCI_DEV_ID_DECL_IXGBE(vend, dev) case (dev):
+ #include <rte_pci_dev_ids.h>
+ ixgbe_kni_remove(dev->pci_dev);
+ break;
+ default:
+ break;
+ }
+
+ if (dev->net_dev) {
+ unregister_netdev(dev->net_dev);
+ free_netdev(dev->net_dev);
+ }
+
+ return 0;
+}
+
+static int
+kni_check_param(struct kni_dev *kni, struct rte_kni_device_info *dev)
+{
+ if (!kni || !dev)
+ return -1;
+
+ /* Check if network name has been used */
+ if (!strncmp(kni->name, dev->name, RTE_KNI_NAMESIZE)) {
+ KNI_ERR("KNI name %s duplicated\n", dev->name);
+ return -1;
+ }
return 0;
}
struct pci_dev *found_pci = NULL;
struct net_device *net_dev = NULL;
struct net_device *lad_dev = NULL;
- struct kni_dev *kni;
-
- if (num_devs == KNI_MAX_DEVICES)
- return -EBUSY;
+ struct kni_dev *kni, *dev, *n;
+ printk(KERN_INFO "KNI: Creating kni...\n");
/* Check the buffer size, to avoid warning */
if (_IOC_SIZE(ioctl_num) > sizeof(dev_info))
return -EINVAL;
/* Copy kni info from user space */
- ret = copy_from_user(&dev_info, (void *)ioctl_param,
- _IOC_SIZE(ioctl_num));
+ ret = copy_from_user(&dev_info, (void *)ioctl_param, sizeof(dev_info));
if (ret) {
- KNI_ERR("copy_from_user");
+ KNI_ERR("copy_from_user in kni_ioctl_create");
return -EIO;
}
+ /**
+ * Check if the cpu core id is valid for binding,
+ * for multiple kernel thread mode.
+ */
+ if (multiple_kthread_on && dev_info.force_bind &&
+ !cpu_online(dev_info.core_id)) {
+ KNI_ERR("cpu %u is not online\n", dev_info.core_id);
+ return -EINVAL;
+ }
+
+ /* Check if it has been created */
+ down_read(&kni_list_lock);
+ list_for_each_entry_safe(dev, n, &kni_list_head, list) {
+ if (kni_check_param(dev, &dev_info) < 0) {
+ up_read(&kni_list_lock);
+ return -EINVAL;
+ }
+ }
+ up_read(&kni_list_lock);
+
net_dev = alloc_netdev(sizeof(struct kni_dev), dev_info.name,
kni_net_init);
if (net_dev == NULL) {
kni = netdev_priv(net_dev);
kni->net_dev = net_dev;
- kni->idx = num_devs;
+ kni->group_id = dev_info.group_id;
+ kni->core_id = dev_info.core_id;
+ strncpy(kni->name, dev_info.name, RTE_KNI_NAMESIZE);
/* Translate user space info into kernel space info */
kni->tx_q = phys_to_virt(dev_info.tx_phys);
kni->req_q = phys_to_virt(dev_info.req_phys);
kni->resp_q = phys_to_virt(dev_info.resp_phys);
-
kni->sync_va = dev_info.sync_va;
kni->sync_kva = phys_to_virt(dev_info.sync_phys);
kni->mbuf_kva = phys_to_virt(dev_info.mbuf_phys);
kni->mbuf_va = dev_info.mbuf_va;
+#ifdef RTE_KNI_VHOST
+ kni->vhost_queue = NULL;
+ kni->vq_status = BE_STOP;
+#endif
kni->mbuf_size = dev_info.mbuf_size;
- KNI_PRINT("tx_phys: 0x%016llx, tx_q addr: 0x%p\n",
- dev_info.tx_phys, kni->tx_q);
- KNI_PRINT("rx_phys: 0x%016llx, rx_q addr: 0x%p\n",
- dev_info.rx_phys, kni->rx_q);
- KNI_PRINT("alloc_phys: 0x%016llx, alloc_q addr: 0x%p\n",
- dev_info.alloc_phys, kni->alloc_q);
- KNI_PRINT("free_phys: 0x%016llx, free_q addr: 0x%p\n",
- dev_info.free_phys, kni->free_q);
- KNI_PRINT("req_phys: 0x%016llx, req_q addr: 0x%p\n",
- dev_info.req_phys, kni->req_q);
- KNI_PRINT("resp_phys: 0x%016llx, resp_q addr: 0x%p\n",
- dev_info.resp_phys, kni->resp_q);
- KNI_PRINT("mbuf_phys: 0x%016llx, mbuf_kva: 0x%p\n",
- dev_info.mbuf_phys, kni->mbuf_kva);
- KNI_PRINT("mbuf_va: 0x%p\n", dev_info.mbuf_va);
- KNI_PRINT("mbuf_size: %u\n", kni->mbuf_size);
-
- KNI_DBG("PCI: %02x:%02x.%02x %04x:%04x\n", dev_info.bus, dev_info.devid,
- dev_info.function, dev_info.vendor_id, dev_info.device_id);
+ KNI_PRINT("tx_phys: 0x%016llx, tx_q addr: 0x%p\n",
+ (unsigned long long) dev_info.tx_phys, kni->tx_q);
+ KNI_PRINT("rx_phys: 0x%016llx, rx_q addr: 0x%p\n",
+ (unsigned long long) dev_info.rx_phys, kni->rx_q);
+ KNI_PRINT("alloc_phys: 0x%016llx, alloc_q addr: 0x%p\n",
+ (unsigned long long) dev_info.alloc_phys, kni->alloc_q);
+ KNI_PRINT("free_phys: 0x%016llx, free_q addr: 0x%p\n",
+ (unsigned long long) dev_info.free_phys, kni->free_q);
+ KNI_PRINT("req_phys: 0x%016llx, req_q addr: 0x%p\n",
+ (unsigned long long) dev_info.req_phys, kni->req_q);
+ KNI_PRINT("resp_phys: 0x%016llx, resp_q addr: 0x%p\n",
+ (unsigned long long) dev_info.resp_phys, kni->resp_q);
+ KNI_PRINT("mbuf_phys: 0x%016llx, mbuf_kva: 0x%p\n",
+ (unsigned long long) dev_info.mbuf_phys, kni->mbuf_kva);
+ KNI_PRINT("mbuf_va: 0x%p\n", dev_info.mbuf_va);
+ KNI_PRINT("mbuf_size: %u\n", kni->mbuf_size);
+
+ KNI_DBG("PCI: %02x:%02x.%02x %04x:%04x\n",
+ dev_info.bus,
+ dev_info.devid,
+ dev_info.function,
+ dev_info.vendor_id,
+ dev_info.device_id);
pci = pci_get_device(dev_info.vendor_id, dev_info.device_id, NULL);
/* Support Ethtool */
while (pci) {
- KNI_PRINT("pci_bus: %02x:%02x:%02x \n", pci->bus->number,
- PCI_SLOT(pci->devfn), PCI_FUNC(pci->devfn));
+ KNI_PRINT("pci_bus: %02x:%02x:%02x \n",
+ pci->bus->number,
+ PCI_SLOT(pci->devfn),
+ PCI_FUNC(pci->devfn));
if ((pci->bus->number == dev_info.bus) &&
(PCI_SLOT(pci->devfn) == dev_info.devid) &&
(PCI_FUNC(pci->devfn) == dev_info.function)) {
found_pci = pci;
-
switch (dev_info.device_id) {
#define RTE_PCI_DEV_ID_DECL_IGB(vend, dev) case (dev):
#include <rte_pci_dev_ids.h>
ret = igb_kni_probe(found_pci, &lad_dev);
break;
- #define RTE_PCI_DEV_ID_DECL_IXGBE(vend, dev) case (dev):
+ #define RTE_PCI_DEV_ID_DECL_IXGBE(vend, dev) \
+ case (dev):
#include <rte_pci_dev_ids.h>
ret = ixgbe_kni_probe(found_pci, &lad_dev);
break;
break;
}
- KNI_DBG("PCI found: pci=0x%p, lad_dev=0x%p\n", pci, lad_dev);
+ KNI_DBG("PCI found: pci=0x%p, lad_dev=0x%p\n",
+ pci, lad_dev);
if (ret == 0) {
kni->lad_dev = lad_dev;
kni_set_ethtool_ops(kni->net_dev);
- }
- else {
+ } else {
KNI_ERR("Device not supported by ethtool");
kni->lad_dev = NULL;
}
kni->device_id = dev_info.device_id;
break;
}
- pci = pci_get_device(dev_info.vendor_id, dev_info.device_id,
- pci);
+ pci = pci_get_device(dev_info.vendor_id,
+ dev_info.device_id, pci);
}
-
if (pci)
pci_dev_put(pci);
ret = register_netdev(net_dev);
if (ret) {
- KNI_ERR("error %i registering device \"%s\"\n", ret,
- dev_info.name);
- free_netdev(net_dev);
+ KNI_ERR("error %i registering device \"%s\"\n",
+ ret, dev_info.name);
+ kni_dev_remove(kni);
return -ENODEV;
}
- kni_devs[num_devs++] = kni;
+#ifdef RTE_KNI_VHOST
+ kni_vhost_init(kni);
+#endif
+
+ /**
+ * Create a new kernel thread for multiple mode, set its core affinity,
+ * and finally wake it up.
+ */
+ if (multiple_kthread_on) {
+ kni->pthread = kthread_create(kni_thread_multiple,
+ (void *)kni,
+ "kni_%s", kni->name);
+ if (IS_ERR(kni->pthread)) {
+ kni_dev_remove(kni);
+ return -ECANCELED;
+ }
+ if (dev_info.force_bind)
+ kthread_bind(kni->pthread, kni->core_id);
+ wake_up_process(kni->pthread);
+ }
+
+ down_write(&kni_list_lock);
+ list_add(&kni->list, &kni_list_head);
+ up_write(&kni_list_lock);
return 0;
}
+static int
+kni_ioctl_release(unsigned int ioctl_num, unsigned long ioctl_param)
+{
+ int ret = -EINVAL;
+ struct kni_dev *dev, *n;
+ struct rte_kni_device_info dev_info;
+
+ if (_IOC_SIZE(ioctl_num) > sizeof(dev_info))
+ return -EINVAL;
+
+ ret = copy_from_user(&dev_info, (void *)ioctl_param, sizeof(dev_info));
+ if (ret) {
+ KNI_ERR("copy_from_user in kni_ioctl_release");
+ return -EIO;
+ }
+
+ /* Release the network device according to its name */
+ if (strlen(dev_info.name) == 0)
+ return ret;
+
+ down_write(&kni_list_lock);
+ list_for_each_entry_safe(dev, n, &kni_list_head, list) {
+ if (strncmp(dev->name, dev_info.name, RTE_KNI_NAMESIZE) != 0)
+ continue;
+
+ if (multiple_kthread_on && dev->pthread != NULL) {
+ kthread_stop(dev->pthread);
+ dev->pthread = NULL;
+ }
+
+#ifdef RTE_KNI_VHOST
+ kni_vhost_backend_release(dev);
+#endif
+ kni_dev_remove(dev);
+ list_del(&dev->list);
+ ret = 0;
+ break;
+ }
+ up_write(&kni_list_lock);
+ printk(KERN_INFO "KNI: %s release kni named %s\n",
+ (ret == 0 ? "Successfully" : "Unsuccessfully"), dev_info.name);
+
+ return ret;
+}
+
static int
kni_ioctl(struct inode *inode,
unsigned int ioctl_num,
case _IOC_NR(RTE_KNI_IOCTL_CREATE):
ret = kni_ioctl_create(ioctl_num, ioctl_param);
break;
+ case _IOC_NR(RTE_KNI_IOCTL_RELEASE):
+ ret = kni_ioctl_release(ioctl_num, ioctl_param);
+ break;
default:
KNI_DBG("IOCTL default \n");
break;
"\n"
);
+module_param(kthread_mode, charp, S_IRUGO);
+MODULE_PARM_DESC(kthread_mode,
+"Kernel thread mode (default=single):\n"
+" single Single kernel thread mode enabled.\n"
+" multiple Multiple kernel thread mode enabled.\n"
+"\n"
+);
+
git.droids-corp.org / dpdk.git / blobdiff