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Date: Thu, 22 Sep 2011 14:35:43 -0700
From: Greg Rose <gregory.v.rose@...el.com>
To: netdev@...r.kernel.org
Subject: [RFC PATCH V2] ethtool: Add command to configure IOV features
New command to allow configuration of IOV features such as the number of
Virtual Functions to allocate for a given Physical Function interface,
the number of semi-independent net devices to allocate from partitioned
I/O resources in the PF and to set the number of queues per VF.
Signed-off-by: Greg Rose <gregory.v.rose@...el.com>
---
ethtool.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 93 insertions(+), 1 deletions(-)
diff --git a/ethtool.c b/ethtool.c
index 35c3733..1ebf6f3 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -99,6 +99,8 @@ static int do_flash(int fd, struct ifreq *ifr);
static int do_permaddr(int fd, struct ifreq *ifr);
static int do_getfwdump(int fd, struct ifreq *ifr);
static int do_setfwdump(int fd, struct ifreq *ifr);
+static int do_get_iov(int fd, struct ifreq *ifr);
+static int do_set_iov(int fd, struct ifreq *ifr);
static int send_ioctl(int fd, struct ifreq *ifr);
@@ -133,6 +135,8 @@ static enum {
MODE_PERMADDR,
MODE_SET_DUMP,
MODE_GET_DUMP,
+ MODE_GET_IOV,
+ MODE_SET_IOV,
} mode = MODE_GSET;
static struct option {
@@ -266,6 +270,8 @@ static struct option {
{ "-W", "--set-dump", MODE_SET_DUMP,
"Set dump flag of the device",
" N\n"},
+ { "-v", "--get-iov", MODE_GET_IOV, "Get IOV parameters", "\n" },
+ { "-V", "--set_iov", MODE_SET_IOV, "Set IOV parameters", "[ N ]\n" },
{ "-h", "--help", MODE_HELP, "Show this help" },
{ NULL, "--version", MODE_VERSION, "Show version number" },
{}
@@ -392,6 +398,10 @@ static char **rxfhindir_weight = NULL;
static char *flash_file = NULL;
static int flash = -1;
static int flash_region = -1;
+static int iov_changed = 0;
+static int iov_numvfs_wanted = -1;
+static int iov_numnetdevs_wanted = -1;
+static int iov_numvqueues_wanted = -1;
static int msglvl_changed;
static u32 msglvl_wanted = 0;
@@ -549,6 +559,12 @@ static struct cmdline_info cmdline_msglvl[] = {
NETIF_MSG_WOL, &msglvl_mask },
};
+static struct cmdline_info cmdline_iov[] = {
+ { "vfs", CMDL_S32, &iov_numvfs_wanted, NULL },
+ { "netdevs", CMDL_S32, &iov_numnetdevs_wanted, NULL },
+ { "vqueues", CMDL_S32, &iov_numvqueues_wanted, NULL },
+};
+
static long long
get_int_range(char *str, int base, long long min, long long max)
{
@@ -792,7 +808,9 @@ static void parse_cmdline(int argc, char **argp)
(mode == MODE_FLASHDEV) ||
(mode == MODE_PERMADDR) ||
(mode == MODE_SET_DUMP) ||
- (mode == MODE_GET_DUMP)) {
+ (mode == MODE_GET_DUMP) ||
+ (mode == MODE_GET_IOV) ||
+ (mode == MODE_SET_IOV)) {
devname = argp[i];
break;
}
@@ -1007,6 +1025,14 @@ static void parse_cmdline(int argc, char **argp)
i = argc;
break;
}
+ if (mode == MODE_SET_IOV) {
+ parse_generic_cmdline(argc, argp, i,
+ &iov_changed,
+ cmdline_iov,
+ ARRAY_SIZE(cmdline_iov));
+ i = argc;
+ break;
+ }
if (mode != MODE_SSET)
exit_bad_args();
if (!strcmp(argp[i], "speed")) {
@@ -1949,6 +1975,10 @@ static int doit(void)
return do_getfwdump(fd, &ifr);
} else if (mode == MODE_SET_DUMP) {
return do_setfwdump(fd, &ifr);
+ } else if (mode == MODE_GET_IOV) {
+ return do_get_iov(fd, &ifr);
+ } else if (mode == MODE_SET_IOV) {
+ return do_set_iov(fd, &ifr);
}
return 69;
@@ -3338,6 +3368,68 @@ static int do_setfwdump(int fd, struct ifreq *ifr)
return 0;
}
+static int do_get_iov(int fd, struct ifreq *ifr)
+{
+ int err;
+ struct ethtool_iov_get_cmd iov_cmd;
+
+ iov_cmd.cmd = ETHTOOL_IOV_GET_CMD;
+ ifr->ifr_data = (caddr_t)&iov_cmd;
+ err = send_ioctl(fd, ifr);
+ if (err < 0) {
+ perror("Can not get current IOV mode\n");
+ return 1;
+ }
+
+ memcpy(&iov_cmd, ifr->ifr_data, sizeof(iov_cmd));
+
+ switch(iov_cmd.mode) {
+ case ETHTOOL_IOV_MODE_SRIOV:
+ printf("Device %s is configured for SR-IOV mode\n", devname);
+ break;
+ case ETHTOOL_IOV_MODE_VM_QUEUES:
+ printf("Device %s is configured for VM Queues mode\n", devname);
+ break;
+ case ETHTOOL_IOV_MODE_NONE:
+ default:
+ printf("Device %s is not configured for IO Virtualization\n",
+ devname);
+ break;
+ }
+
+ return 0;
+}
+
+static int do_set_iov(int fd, struct ifreq *ifr)
+{
+ int err;
+ struct ethtool_iov_set_cmd iov_cmd;
+
+ if (iov_changed) {
+ iov_cmd.cmd = ETHTOOL_IOV_SET_CMD;
+ if (iov_numvfs_wanted >= 0) {
+ iov_cmd.set_cmd = ETHTOOL_IOV_CMD_CONFIGURE_SRIOV;
+ iov_cmd.cmd_param = iov_numvfs_wanted;
+ } else if (iov_numnetdevs_wanted >= 0) {
+ iov_cmd.set_cmd = ETHTOOL_IOV_CMD_CONFIGURE_NETDEVS;
+ iov_cmd.cmd_param = iov_numnetdevs_wanted;
+ } else if (iov_numvqueues_wanted >= 0) {
+ iov_cmd.set_cmd = ETHTOOL_IOV_CMD_CONFIGURE_VF_QUEUES;
+ iov_cmd.cmd_param = iov_numvqueues_wanted;
+ } else {
+ return -EINVAL;
+ }
+ ifr->ifr_data = (caddr_t)&iov_cmd;
+ err = send_ioctl(fd, ifr);
+ if (err < 0) {
+ perror("Can not set new IOV mode\n");
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
static int send_ioctl(int fd, struct ifreq *ifr)
{
return ioctl(fd, SIOCETHTOOL, ifr);
--
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