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authorUpinder Malhi <umalhi@cisco.com>2014-01-09 14:48:07 -0800
committerRoland Dreier <roland@purestorage.com>2014-01-14 00:44:41 -0800
commit2183b990b67b761f81c68a18f60df028e080cf05 (patch)
treea4584a808fa389bd51394b4e8c1ef5fe2979fe48 /drivers/infiniband/hw
parentIB/usnic: Add struct usnic_transport_spec (diff)
downloadlinux-dev-2183b990b67b761f81c68a18f60df028e080cf05.tar.xz
linux-dev-2183b990b67b761f81c68a18f60df028e080cf05.zip
IB/usnic: Push all forwarding state to usnic_fwd.[hc]
Push all of the usnic device forwarding state - such as mtu, mac - to usnic_fwd_dev. Furthermore, usnic_fwd.h exposes a improved interface for rest of the usnic code. The primary improvement is that usnic_fwd.h's flow management interface takes in high-level *filter* and *action* structures now, instead of low-level paramaters such as vnic_idx, rq_idx. Signed-off-by: Upinder Malhi <umalhi@cisco.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw')
-rw-r--r--drivers/infiniband/hw/usnic/usnic_fwd.c269
-rw-r--r--drivers/infiniband/hw/usnic/usnic_fwd.h68
2 files changed, 212 insertions, 125 deletions
diff --git a/drivers/infiniband/hw/usnic/usnic_fwd.c b/drivers/infiniband/hw/usnic/usnic_fwd.c
index 8e42216362e7..33fdd771e599 100644
--- a/drivers/infiniband/hw/usnic/usnic_fwd.c
+++ b/drivers/infiniband/hw/usnic/usnic_fwd.c
@@ -23,6 +23,49 @@
#include "usnic_fwd.h"
#include "usnic_log.h"
+static int usnic_fwd_devcmd_locked(struct usnic_fwd_dev *ufdev, int vnic_idx,
+ enum vnic_devcmd_cmd cmd, u64 *a0,
+ u64 *a1)
+{
+ int status;
+ struct net_device *netdev = ufdev->netdev;
+
+ lockdep_assert_held(&ufdev->lock);
+
+ status = enic_api_devcmd_proxy_by_index(netdev,
+ vnic_idx,
+ cmd,
+ a0, a1,
+ 1000);
+ if (status) {
+ if (status == ERR_EINVAL && cmd == CMD_DEL_FILTER) {
+ usnic_dbg("Dev %s vnic idx %u cmd %u already deleted",
+ ufdev->name, vnic_idx, cmd);
+ } else {
+ usnic_err("Dev %s vnic idx %u cmd %u failed with status %d\n",
+ ufdev->name, vnic_idx, cmd,
+ status);
+ }
+ } else {
+ usnic_dbg("Dev %s vnic idx %u cmd %u success",
+ ufdev->name, vnic_idx, cmd);
+ }
+
+ return status;
+}
+
+static int usnic_fwd_devcmd(struct usnic_fwd_dev *ufdev, int vnic_idx,
+ enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1)
+{
+ int status;
+
+ spin_lock(&ufdev->lock);
+ status = usnic_fwd_devcmd_locked(ufdev, vnic_idx, cmd, a0, a1);
+ spin_unlock(&ufdev->lock);
+
+ return status;
+}
+
struct usnic_fwd_dev *usnic_fwd_dev_alloc(struct pci_dev *pdev)
{
struct usnic_fwd_dev *ufdev;
@@ -34,6 +77,8 @@ struct usnic_fwd_dev *usnic_fwd_dev_alloc(struct pci_dev *pdev)
ufdev->pdev = pdev;
ufdev->netdev = pci_get_drvdata(pdev);
spin_lock_init(&ufdev->lock);
+ strncpy(ufdev->name, netdev_name(ufdev->netdev),
+ sizeof(ufdev->name) - 1);
return ufdev;
}
@@ -43,200 +88,208 @@ void usnic_fwd_dev_free(struct usnic_fwd_dev *ufdev)
kfree(ufdev);
}
-static int usnic_fwd_devcmd(struct usnic_fwd_dev *ufdev, int vnic_idx,
- enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1)
+void usnic_fwd_set_mac(struct usnic_fwd_dev *ufdev, char mac[ETH_ALEN])
{
- int status;
- struct net_device *netdev = ufdev->netdev;
+ spin_lock(&ufdev->lock);
+ memcpy(&ufdev->mac, mac, sizeof(ufdev->mac));
+ spin_unlock(&ufdev->lock);
+}
+void usnic_fwd_carrier_up(struct usnic_fwd_dev *ufdev)
+{
spin_lock(&ufdev->lock);
- status = enic_api_devcmd_proxy_by_index(netdev,
- vnic_idx,
- cmd,
- a0, a1,
- 1000);
+ ufdev->link_up = 1;
spin_unlock(&ufdev->lock);
- if (status) {
- if (status == ERR_EINVAL && cmd == CMD_DEL_FILTER) {
- usnic_dbg("Dev %s vnic idx %u cmd %u already deleted",
- netdev_name(netdev), vnic_idx, cmd);
- } else {
- usnic_err("Dev %s vnic idx %u cmd %u failed with status %d\n",
- netdev_name(netdev), vnic_idx, cmd,
- status);
- }
- } else {
- usnic_dbg("Dev %s vnic idx %u cmd %u success",
- netdev_name(netdev), vnic_idx,
- cmd);
- }
+}
- return status;
+void usnic_fwd_carrier_down(struct usnic_fwd_dev *ufdev)
+{
+ spin_lock(&ufdev->lock);
+ ufdev->link_up = 0;
+ spin_unlock(&ufdev->lock);
+}
+
+void usnic_fwd_set_mtu(struct usnic_fwd_dev *ufdev, unsigned int mtu)
+{
+ spin_lock(&ufdev->lock);
+ ufdev->mtu = mtu;
+ spin_unlock(&ufdev->lock);
+}
+
+static int usnic_fwd_dev_ready_locked(struct usnic_fwd_dev *ufdev)
+{
+ lockdep_assert_held(&ufdev->lock);
+
+ if (!ufdev->link_up)
+ return -EPERM;
+
+ return 0;
+}
+
+static void fill_tlv(struct filter_tlv *tlv, struct filter *filter,
+ struct filter_action *action)
+{
+ tlv->type = CLSF_TLV_FILTER;
+ tlv->length = sizeof(struct filter);
+ *((struct filter *)&tlv->val) = *filter;
+
+ tlv = (struct filter_tlv *)((char *)tlv + sizeof(struct filter_tlv) +
+ sizeof(struct filter));
+ tlv->type = CLSF_TLV_ACTION;
+ tlv->length = sizeof(struct filter_action);
+ *((struct filter_action *)&tlv->val) = *action;
}
-int usnic_fwd_add_usnic_filter(struct usnic_fwd_dev *ufdev, int vnic_idx,
- int rq_idx, struct usnic_fwd_filter *fwd_filter,
- struct usnic_fwd_filter_hndl **filter_hndl)
+struct usnic_fwd_flow*
+usnic_fwd_alloc_flow(struct usnic_fwd_dev *ufdev, struct filter *filter,
+ struct usnic_filter_action *uaction)
{
- struct filter_tlv *tlv, *tlv_va;
- struct filter *filter;
- struct filter_action *action;
+ struct filter_tlv *tlv;
struct pci_dev *pdev;
- struct usnic_fwd_filter_hndl *usnic_filter_hndl;
- int status;
- u64 a0, a1;
- u64 tlv_size;
+ struct usnic_fwd_flow *flow;
+ uint64_t a0, a1;
+ uint64_t tlv_size;
dma_addr_t tlv_pa;
+ int status;
pdev = ufdev->pdev;
- tlv_size = (2*sizeof(struct filter_tlv) +
- sizeof(struct filter) +
- sizeof(struct filter_action));
+ tlv_size = (2*sizeof(struct filter_tlv) + sizeof(struct filter) +
+ sizeof(struct filter_action));
+
+ flow = kzalloc(sizeof(*flow), GFP_ATOMIC);
+ if (!flow)
+ return ERR_PTR(-ENOMEM);
+
tlv = pci_alloc_consistent(pdev, tlv_size, &tlv_pa);
if (!tlv) {
usnic_err("Failed to allocate memory\n");
- return -ENOMEM;
+ status = -ENOMEM;
+ goto out_free_flow;
}
- usnic_filter_hndl = kzalloc(sizeof(*usnic_filter_hndl), GFP_ATOMIC);
- if (!usnic_filter_hndl) {
- usnic_err("Failed to allocate memory for hndl\n");
- pci_free_consistent(pdev, tlv_size, tlv, tlv_pa);
- return -ENOMEM;
+ fill_tlv(tlv, filter, &uaction->action);
+
+ spin_lock(&ufdev->lock);
+ status = usnic_fwd_dev_ready_locked(ufdev);
+ if (status) {
+ usnic_err("Forwarding dev %s not ready with status %d\n",
+ ufdev->name, status);
+ goto out_free_tlv;
}
- tlv_va = tlv;
+ /* Issue Devcmd */
a0 = tlv_pa;
a1 = tlv_size;
- memset(tlv, 0, tlv_size);
- tlv->type = CLSF_TLV_FILTER;
- tlv->length = sizeof(struct filter);
- filter = (struct filter *)&tlv->val;
- filter->type = FILTER_USNIC_ID;
- filter->u.usnic.ethtype = USNIC_ROCE_ETHERTYPE;
- filter->u.usnic.flags = FILTER_FIELD_USNIC_ETHTYPE |
- FILTER_FIELD_USNIC_ID |
- FILTER_FIELD_USNIC_PROTO;
- filter->u.usnic.proto_version = (USNIC_ROCE_GRH_VER <<
- USNIC_ROCE_GRH_VER_SHIFT)
- | USNIC_PROTO_VER;
- filter->u.usnic.usnic_id = fwd_filter->port_num;
- tlv = (struct filter_tlv *)((char *)tlv + sizeof(struct filter_tlv) +
- sizeof(struct filter));
- tlv->type = CLSF_TLV_ACTION;
- tlv->length = sizeof(struct filter_action);
- action = (struct filter_action *)&tlv->val;
- action->type = FILTER_ACTION_RQ_STEERING;
- action->u.rq_idx = rq_idx;
-
- status = usnic_fwd_devcmd(ufdev, vnic_idx, CMD_ADD_FILTER, &a0, &a1);
- pci_free_consistent(pdev, tlv_size, tlv_va, tlv_pa);
+ status = usnic_fwd_devcmd_locked(ufdev, uaction->vnic_idx,
+ CMD_ADD_FILTER, &a0, &a1);
if (status) {
usnic_err("VF %s Filter add failed with status:%d",
- pci_name(pdev),
- status);
- kfree(usnic_filter_hndl);
- return status;
+ ufdev->name, status);
+ status = -EFAULT;
+ goto out_free_tlv;
} else {
- usnic_dbg("VF %s FILTER ID:%u",
- pci_name(pdev),
- (u32)a0);
+ usnic_dbg("VF %s FILTER ID:%llu", ufdev->name, a0);
}
- usnic_filter_hndl->type = FILTER_USNIC_ID;
- usnic_filter_hndl->id = (u32)a0;
- usnic_filter_hndl->vnic_idx = vnic_idx;
- usnic_filter_hndl->ufdev = ufdev;
- usnic_filter_hndl->filter = fwd_filter;
- *filter_hndl = usnic_filter_hndl;
+ flow->flow_id = (uint32_t) a0;
+ flow->vnic_idx = uaction->vnic_idx;
+ flow->ufdev = ufdev;
- return status;
+out_free_tlv:
+ spin_unlock(&ufdev->lock);
+ pci_free_consistent(pdev, tlv_size, tlv, tlv_pa);
+ if (!status)
+ return flow;
+out_free_flow:
+ kfree(flow);
+ return ERR_PTR(status);
}
-int usnic_fwd_del_filter(struct usnic_fwd_filter_hndl *filter_hndl)
+int usnic_fwd_dealloc_flow(struct usnic_fwd_flow *flow)
{
int status;
u64 a0, a1;
- struct net_device *netdev;
- netdev = filter_hndl->ufdev->netdev;
- a0 = filter_hndl->id;
+ a0 = flow->flow_id;
- status = usnic_fwd_devcmd(filter_hndl->ufdev, filter_hndl->vnic_idx,
+ status = usnic_fwd_devcmd(flow->ufdev, flow->vnic_idx,
CMD_DEL_FILTER, &a0, &a1);
if (status) {
if (status == ERR_EINVAL) {
usnic_dbg("Filter %u already deleted for VF Idx %u pf: %s status: %d",
- filter_hndl->id, filter_hndl->vnic_idx,
- netdev_name(netdev), status);
- status = 0;
- kfree(filter_hndl);
+ flow->flow_id, flow->vnic_idx,
+ flow->ufdev->name, status);
} else {
usnic_err("PF %s VF Idx %u Filter: %u FILTER DELETE failed with status %d",
- netdev_name(netdev),
- filter_hndl->vnic_idx, filter_hndl->id,
- status);
+ flow->ufdev->name, flow->vnic_idx,
+ flow->flow_id, status);
}
+ status = 0;
+ /*
+ * Log the error and fake success to the caller because if
+ * a flow fails to be deleted in the firmware, it is an
+ * unrecoverable error.
+ */
} else {
usnic_dbg("PF %s VF Idx %u Filter: %u FILTER DELETED",
- netdev_name(netdev), filter_hndl->vnic_idx,
- filter_hndl->id);
- kfree(filter_hndl);
+ flow->ufdev->name, flow->vnic_idx,
+ flow->flow_id);
}
+ kfree(flow);
return status;
}
-int usnic_fwd_enable_rq(struct usnic_fwd_dev *ufdev, int vnic_idx, int rq_idx)
+int usnic_fwd_enable_qp(struct usnic_fwd_dev *ufdev, int vnic_idx, int qp_idx)
{
int status;
struct net_device *pf_netdev;
u64 a0, a1;
pf_netdev = ufdev->netdev;
- a0 = rq_idx;
+ a0 = qp_idx;
a1 = CMD_QP_RQWQ;
- status = usnic_fwd_devcmd(ufdev, vnic_idx, CMD_QP_ENABLE, &a0, &a1);
-
+ status = usnic_fwd_devcmd(ufdev, vnic_idx, CMD_QP_ENABLE,
+ &a0, &a1);
if (status) {
usnic_err("PF %s VNIC Index %u RQ Index: %u ENABLE Failed with status %d",
netdev_name(pf_netdev),
vnic_idx,
- rq_idx,
+ qp_idx,
status);
} else {
usnic_dbg("PF %s VNIC Index %u RQ Index: %u ENABLED",
netdev_name(pf_netdev),
- vnic_idx, rq_idx);
+ vnic_idx, qp_idx);
}
return status;
}
-int usnic_fwd_disable_rq(struct usnic_fwd_dev *ufdev, int vnic_idx, int rq_idx)
+int usnic_fwd_disable_qp(struct usnic_fwd_dev *ufdev, int vnic_idx, int qp_idx)
{
int status;
u64 a0, a1;
struct net_device *pf_netdev;
pf_netdev = ufdev->netdev;
- a0 = rq_idx;
+ a0 = qp_idx;
a1 = CMD_QP_RQWQ;
- status = usnic_fwd_devcmd(ufdev, vnic_idx, CMD_QP_DISABLE, &a0, &a1);
-
+ status = usnic_fwd_devcmd(ufdev, vnic_idx, CMD_QP_DISABLE,
+ &a0, &a1);
if (status) {
usnic_err("PF %s VNIC Index %u RQ Index: %u DISABLE Failed with status %d",
netdev_name(pf_netdev),
vnic_idx,
- rq_idx,
+ qp_idx,
status);
} else {
usnic_dbg("PF %s VNIC Index %u RQ Index: %u DISABLED",
netdev_name(pf_netdev),
vnic_idx,
- rq_idx);
+ qp_idx);
}
return status;
diff --git a/drivers/infiniband/hw/usnic/usnic_fwd.h b/drivers/infiniband/hw/usnic/usnic_fwd.h
index 6973901da8af..b146eb97d82c 100644
--- a/drivers/infiniband/hw/usnic/usnic_fwd.h
+++ b/drivers/infiniband/hw/usnic/usnic_fwd.h
@@ -20,39 +20,73 @@
#define USNIC_FWD_H_
#include <linux/if.h>
+#include <linux/netdevice.h>
#include <linux/pci.h>
-#include <linux/spinlock.h>
+#include <linux/in.h>
#include "usnic_abi.h"
+#include "usnic_common_pkt_hdr.h"
#include "vnic_devcmd.h"
struct usnic_fwd_dev {
struct pci_dev *pdev;
struct net_device *netdev;
spinlock_t lock;
+ /*
+ * The following fields can be read directly off the device.
+ * However, they should be set by a accessor function, except name,
+ * which cannot be changed.
+ */
+ bool link_up;
+ char mac[ETH_ALEN];
+ unsigned int mtu;
+ char name[IFNAMSIZ+1];
};
-struct usnic_fwd_filter {
- enum usnic_transport_type transport;
- u16 port_num;
+struct usnic_fwd_flow {
+ uint32_t flow_id;
+ struct usnic_fwd_dev *ufdev;
+ unsigned int vnic_idx;
};
-struct usnic_fwd_filter_hndl {
- enum filter_type type;
- u32 id;
- u32 vnic_idx;
- struct usnic_fwd_dev *ufdev;
- struct list_head link;
- struct usnic_fwd_filter *filter;
+struct usnic_filter_action {
+ int vnic_idx;
+ struct filter_action action;
};
struct usnic_fwd_dev *usnic_fwd_dev_alloc(struct pci_dev *pdev);
void usnic_fwd_dev_free(struct usnic_fwd_dev *ufdev);
-int usnic_fwd_add_usnic_filter(struct usnic_fwd_dev *ufdev, int vnic_idx,
- int rq_idx, struct usnic_fwd_filter *filter,
- struct usnic_fwd_filter_hndl **filter_hndl);
-int usnic_fwd_del_filter(struct usnic_fwd_filter_hndl *filter_hndl);
-int usnic_fwd_enable_rq(struct usnic_fwd_dev *ufdev, int vnic_idx, int rq_idx);
-int usnic_fwd_disable_rq(struct usnic_fwd_dev *ufdev, int vnic_idx, int rq_idx);
+
+void usnic_fwd_set_mac(struct usnic_fwd_dev *ufdev, char mac[ETH_ALEN]);
+void usnic_fwd_carrier_up(struct usnic_fwd_dev *ufdev);
+void usnic_fwd_carrier_down(struct usnic_fwd_dev *ufdev);
+void usnic_fwd_set_mtu(struct usnic_fwd_dev *ufdev, unsigned int mtu);
+
+/*
+ * Allocate a flow on this forwarding device. Whoever calls this function,
+ * must monitor netdev events on ufdev's netdevice. If NETDEV_REBOOT or
+ * NETDEV_DOWN is seen, flow will no longer function and must be
+ * immediately freed by calling usnic_dealloc_flow.
+ */
+struct usnic_fwd_flow*
+usnic_fwd_alloc_flow(struct usnic_fwd_dev *ufdev, struct filter *filter,
+ struct usnic_filter_action *action);
+int usnic_fwd_dealloc_flow(struct usnic_fwd_flow *flow);
+int usnic_fwd_enable_qp(struct usnic_fwd_dev *ufdev, int vnic_idx, int qp_idx);
+int usnic_fwd_disable_qp(struct usnic_fwd_dev *ufdev, int vnic_idx, int qp_idx);
+
+static inline void usnic_fwd_init_usnic_filter(struct filter *filter,
+ uint32_t usnic_id)
+{
+ filter->type = FILTER_USNIC_ID;
+ filter->u.usnic.ethtype = USNIC_ROCE_ETHERTYPE;
+ filter->u.usnic.flags = FILTER_FIELD_USNIC_ETHTYPE |
+ FILTER_FIELD_USNIC_ID |
+ FILTER_FIELD_USNIC_PROTO;
+ filter->u.usnic.proto_version = (USNIC_ROCE_GRH_VER <<
+ USNIC_ROCE_GRH_VER_SHIFT) |
+ USNIC_PROTO_VER;
+ filter->u.usnic.usnic_id = usnic_id;
+}
#endif /* !USNIC_FWD_H_ */