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IB/usnic: Add Cisco VIC low-level hardware driver 

This adds a driver that allows userspace to use UD-like QPs over a
proprietary Cisco transport with Cisco's Virtual Interface Cards (VICs),
including VIC 1240 and 1280 cards.

Signed-off-by: Upinder Malhi <umalhi@cisco.com>
Signed-off-by: Christian Benvenuti <benve@cisco.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
hifive-unleashed-5.1
Upinder Malhi 2013-09-10 03:38:16 +00:00 committed by Roland Dreier
parent 7e22e91102
commit e3cf00d0a8
30 changed files with 4904 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
MAINTAINERS
View File

@ -2158,6 +2158,11 @@ M: Nishank Trivedi <nistrive@cisco.com>
S: Supported
F: drivers/net/ethernet/cisco/enic/
CISCO VIC LOW LATENCY NIC DRIVER
M: Upinder Malhi <umalhi@cisco.com>
S: Supported
F: drivers/infiniband/hw/usnic
CIRRUS LOGIC EP93XX ETHERNET DRIVER
M: Hartley Sweeten <hsweeten@visionengravers.com>
L: netdev@vger.kernel.org

1
drivers/infiniband/Kconfig
View File

@ -53,6 +53,7 @@ source "drivers/infiniband/hw/mlx4/Kconfig"
source "drivers/infiniband/hw/mlx5/Kconfig"
source "drivers/infiniband/hw/nes/Kconfig"
source "drivers/infiniband/hw/ocrdma/Kconfig"
source "drivers/infiniband/hw/usnic/Kconfig"
source "drivers/infiniband/ulp/ipoib/Kconfig"

1
drivers/infiniband/Makefile
View File

@ -10,6 +10,7 @@ obj-$(CONFIG_MLX4_INFINIBAND) += hw/mlx4/
obj-$(CONFIG_MLX5_INFINIBAND) += hw/mlx5/
obj-$(CONFIG_INFINIBAND_NES) += hw/nes/
obj-$(CONFIG_INFINIBAND_OCRDMA) += hw/ocrdma/
obj-$(CONFIG_INFINIBAND_USNIC) += hw/usnic/
obj-$(CONFIG_INFINIBAND_IPOIB) += ulp/ipoib/
obj-$(CONFIG_INFINIBAND_SRP) += ulp/srp/
obj-$(CONFIG_INFINIBAND_SRPT) += ulp/srpt/

10
drivers/infiniband/hw/usnic/Kconfig 100644
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@ -0,0 +1,10 @@
config INFINIBAND_USNIC
tristate "Verbs support for Cisco VIC"
depends on NETDEVICES && ETHERNET && PCI && INTEL_IOMMU
select ENIC
select NET_VENDOR_CISCO
select PCI_IOV
select INFINIBAND_USER_ACCESS
---help---
This is a low-level driver for Cisco's Virtual Interface
Cards (VICs), including the VIC 1240 and 1280 cards.

15
drivers/infiniband/hw/usnic/Makefile 100644
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@ -0,0 +1,15 @@
ccflags-y := -Idrivers/net/ethernet/cisco/enic
obj-$(CONFIG_INFINIBAND_USNIC)+= usnic_verbs.o
usnic_verbs-y=\
usnic_fwd.o \
usnic_transport.o \
usnic_uiom.o \
usnic_uiom_interval_tree.o \
usnic_vnic.o \
usnic_ib_main.o \
usnic_ib_qp_grp.o \
usnic_ib_sysfs.o \
usnic_ib_verbs.o \
usnic_debugfs.o \

29
drivers/infiniband/hw/usnic/usnic.h 100644
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@ -0,0 +1,29 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_H_
#define USNIC_H_
#define DRV_NAME "usnic_verbs"
#define PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC 0x00cf /* User space NIC */
#define DRV_VERSION "1.0.2"
#define DRV_RELDATE "September 09, 2013"
#endif /* USNIC_H_ */

56
drivers/infiniband/hw/usnic/usnic_abi.h 100644
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@ -0,0 +1,56 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_ABI_H
#define USNIC_ABI_H
/* ABI between userspace and kernel */
#define USNIC_UVERBS_ABI_VERSION 2
#define USNIC_QP_GRP_MAX_WQS 8
#define USNIC_QP_GRP_MAX_RQS 8
#define USNIC_QP_GRP_MAX_CQS 16
enum usnic_transport_type {
USNIC_TRANSPORT_UNKNOWN = 0,
USNIC_TRANSPORT_ROCE_CUSTOM = 1,
USNIC_TRANSPORT_MAX = 2,
};
/*TODO: Future - usnic_modify_qp needs to pass in generic filters */
struct usnic_ib_create_qp_resp {
u32 vfid;
u32 qp_grp_id;
u64 bar_bus_addr;
u32 bar_len;
/*
* WQ, RQ, CQ are explicity specified bc exposing a generic resources inteface
* expands the scope of ABI to many files.
*/
u32 wq_cnt;
u32 rq_cnt;
u32 cq_cnt;
u32 wq_idx[USNIC_QP_GRP_MAX_WQS];
u32 rq_idx[USNIC_QP_GRP_MAX_RQS];
u32 cq_idx[USNIC_QP_GRP_MAX_CQS];
u32 transport;
u32 reserved[9];
};
#endif /* USNIC_ABI_H */

27
drivers/infiniband/hw/usnic/usnic_common_pkt_hdr.h 100644
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@ -0,0 +1,27 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_CMN_PKT_HDR_H
#define USNIC_CMN_PKT_HDR_H
#define USNIC_ROCE_ETHERTYPE (0x8915)
#define USNIC_ROCE_GRH_VER (8)
#define USNIC_PROTO_VER (1)
#define USNIC_ROCE_GRH_VER_SHIFT (4)
#endif /* USNIC_COMMON_PKT_HDR_H */

51
drivers/infiniband/hw/usnic/usnic_common_util.h 100644
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@ -0,0 +1,51 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_CMN_UTIL_H
#define USNIC_CMN_UTIL_H
static inline void
usnic_mac_to_gid(const char *const mac, char *raw_gid)
{
raw_gid[0] = 0xfe;
raw_gid[1] = 0x80;
memset(&raw_gid[2], 0, 6);
raw_gid[8] = mac[0]^2;
raw_gid[9] = mac[1];
raw_gid[10] = mac[2];
raw_gid[11] = 0xff;
raw_gid[12] = 0xfe;
raw_gid[13] = mac[3];
raw_gid[14] = mac[4];
raw_gid[15] = mac[5];
}
static inline void
usnic_write_gid_if_id_from_mac(char *mac, char *raw_gid)
{
raw_gid[8] = mac[0]^2;
raw_gid[9] = mac[1];
raw_gid[10] = mac[2];
raw_gid[11] = 0xff;
raw_gid[12] = 0xfe;
raw_gid[13] = mac[3];
raw_gid[14] = mac[4];
raw_gid[15] = mac[5];
}
#endif /* USNIC_COMMON_UTIL_H */

71
drivers/infiniband/hw/usnic/usnic_debugfs.c 100644
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@ -0,0 +1,71 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/debugfs.h>
#include <linux/module.h>
#include "usnic.h"
#include "usnic_log.h"
#include "usnic_debugfs.h"
static struct dentry *debugfs_root;
static ssize_t usnic_debugfs_buildinfo_read(struct file *f, char __user *data,
size_t count, loff_t *ppos)
{
char buf[500];
int res;
if (*ppos > 0)
return 0;
res = scnprintf(buf, sizeof(buf),
"version: %s\n"
"build date: %s\n",
DRV_VERSION, DRV_RELDATE);
return simple_read_from_buffer(data, count, ppos, buf, res);
}
static const struct file_operations usnic_debugfs_buildinfo_ops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = usnic_debugfs_buildinfo_read
};
void usnic_debugfs_init(void)
{
debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
if (IS_ERR(debugfs_root)) {
usnic_err("Failed to create debugfs root dir, check if debugfs is enabled in kernel configuration\n");
debugfs_root = NULL;
return;
}
debugfs_create_file("build-info", S_IRUGO, debugfs_root,
NULL, &usnic_debugfs_buildinfo_ops);
}
void usnic_debugfs_exit(void)
{
if (!debugfs_root)
return;
debugfs_remove_recursive(debugfs_root);
debugfs_root = NULL;
}

25
drivers/infiniband/hw/usnic/usnic_debugfs.h 100644
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@ -0,0 +1,25 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_DEBUGFS_H_
#define USNIC_DEBUGFS_H_
void usnic_debugfs_init(void);
void usnic_debugfs_exit(void);
#endif /*!USNIC_DEBUGFS_H_ */

243
drivers/infiniband/hw/usnic/usnic_fwd.c 100644
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@ -0,0 +1,243 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/netdevice.h>
#include <linux/pci.h>
#include "enic_api.h"
#include "usnic_common_pkt_hdr.h"
#include "usnic_fwd.h"
#include "usnic_log.h"
struct usnic_fwd_dev *usnic_fwd_dev_alloc(struct pci_dev *pdev)
{
struct usnic_fwd_dev *ufdev;
ufdev = kzalloc(sizeof(*ufdev), GFP_KERNEL);
if (!ufdev)
return NULL;
ufdev->pdev = pdev;
ufdev->netdev = pci_get_drvdata(pdev);
spin_lock_init(&ufdev->lock);
return ufdev;
}
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)
{
int status;
struct net_device *netdev = ufdev->netdev;
spin_lock(&ufdev->lock);
status = enic_api_devcmd_proxy_by_index(netdev,
vnic_idx,
cmd,
a0, a1,
1000);
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;
}
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 filter_tlv *tlv, *tlv_va;
struct filter *filter;
struct filter_action *action;
struct pci_dev *pdev;
struct usnic_fwd_filter_hndl *usnic_filter_hndl;
int status;
u64 a0, a1;
u64 tlv_size;
dma_addr_t tlv_pa;
pdev = ufdev->pdev;
tlv_size = (2*sizeof(struct filter_tlv) +
sizeof(struct filter) +
sizeof(struct filter_action));
tlv = pci_alloc_consistent(pdev, tlv_size, &tlv_pa);
if (!tlv) {
usnic_err("Failed to allocate memory\n");
return -ENOMEM;
}
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;
}
tlv_va = tlv;
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);
if (status) {
usnic_err("VF %s Filter add failed with status:%d",
pci_name(pdev),
status);
kfree(usnic_filter_hndl);
return status;
} else {
usnic_dbg("VF %s FILTER ID:%u",
pci_name(pdev),
(u32)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;
return status;
}
int usnic_fwd_del_filter(struct usnic_fwd_filter_hndl *filter_hndl)
{
int status;
u64 a0, a1;
struct net_device *netdev;
netdev = filter_hndl->ufdev->netdev;
a0 = filter_hndl->id;
status = usnic_fwd_devcmd(filter_hndl->ufdev, filter_hndl->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);
} 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);
}
} 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);
}
return status;
}
int usnic_fwd_enable_rq(struct usnic_fwd_dev *ufdev, int vnic_idx, int rq_idx)
{
int status;
struct net_device *pf_netdev;
u64 a0, a1;
pf_netdev = ufdev->netdev;
a0 = rq_idx;
a1 = CMD_QP_RQWQ;
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,
status);
} else {
usnic_dbg("PF %s VNIC Index %u RQ Index: %u ENABLED",
netdev_name(pf_netdev),
vnic_idx, rq_idx);
}
return status;
}
int usnic_fwd_disable_rq(struct usnic_fwd_dev *ufdev, int vnic_idx, int rq_idx)
{
int status;
u64 a0, a1;
struct net_device *pf_netdev;
pf_netdev = ufdev->netdev;
a0 = rq_idx;
a1 = CMD_QP_RQWQ;
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,
status);
} else {
usnic_dbg("PF %s VNIC Index %u RQ Index: %u DISABLED",
netdev_name(pf_netdev),
vnic_idx,
rq_idx);
}
return status;
}

58
drivers/infiniband/hw/usnic/usnic_fwd.h 100644
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@ -0,0 +1,58 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_FWD_H_
#define USNIC_FWD_H_
#include <linux/if.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include "usnic_abi.h"
#include "vnic_devcmd.h"
struct usnic_fwd_dev {
struct pci_dev *pdev;
struct net_device *netdev;
spinlock_t lock;
};
struct usnic_fwd_filter {
enum usnic_transport_type transport;
u16 port_num;
};
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_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);
#endif /* !USNIC_FWD_H_ */

115
drivers/infiniband/hw/usnic/usnic_ib.h 100644
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@ -0,0 +1,115 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_IB_H_
#define USNIC_IB_H_
#include <linux/iommu.h>
#include <linux/netdevice.h>
#include <linux/version.h>
#include <rdma/ib_verbs.h>
#include "usnic.h"
#include "usnic_abi.h"
#include "usnic_vnic.h"
#define USNIC_IB_PORT_CNT 1
#define USNIC_IB_NUM_COMP_VECTORS 1
extern unsigned int usnic_ib_share_vf;
struct usnic_ib_ucontext {
struct ib_ucontext ibucontext;
/* Protected by usnic_ib_dev->usdev_lock */
struct list_head qp_grp_list;
struct list_head link;
};
struct usnic_ib_pd {
struct ib_pd ibpd;
struct usnic_uiom_pd *umem_pd;
};
struct usnic_ib_mr {
struct ib_mr ibmr;
struct usnic_uiom_reg *umem;
};
struct usnic_ib_dev {
struct ib_device ib_dev;
struct pci_dev *pdev;
struct net_device *netdev;
struct usnic_fwd_dev *ufdev;
bool link_up;
struct list_head ib_dev_link;
struct list_head vf_dev_list;
struct list_head ctx_list;
struct mutex usdev_lock;
char mac[ETH_ALEN];
unsigned int mtu;
/* provisioning information */
struct kref vf_cnt;
unsigned int vf_res_cnt[USNIC_VNIC_RES_TYPE_MAX];
/* sysfs vars for QPN reporting */
struct kobject *qpn_kobj;
};
struct usnic_ib_vf {
struct usnic_ib_dev *pf;
spinlock_t lock;
struct usnic_vnic *vnic;
unsigned int qp_grp_ref_cnt;
struct usnic_ib_pd *pd;
struct list_head link;
};
static inline
struct usnic_ib_dev *to_usdev(struct ib_device *ibdev)
{
return container_of(ibdev, struct usnic_ib_dev, ib_dev);
}
static inline
struct usnic_ib_ucontext *to_ucontext(struct ib_ucontext *ibucontext)
{
return container_of(ibucontext, struct usnic_ib_ucontext, ibucontext);
}
static inline
struct usnic_ib_pd *to_upd(struct ib_pd *ibpd)
{
return container_of(ibpd, struct usnic_ib_pd, ibpd);
}
static inline
struct usnic_ib_ucontext *to_uucontext(struct ib_ucontext *ibucontext)
{
return container_of(ibucontext, struct usnic_ib_ucontext, ibucontext);
}
static inline
struct usnic_ib_mr *to_umr(struct ib_mr *ibmr)
{
return container_of(ibmr, struct usnic_ib_mr, ibmr);
}
void usnic_ib_log_vf(struct usnic_ib_vf *vf);
#endif /* USNIC_IB_H_ */

598
drivers/infiniband/hw/usnic/usnic_ib_main.c 100644
View File

@ -0,0 +1,598 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Author: Upinder Malhi <umalhi@cisco.com>
* Author: Anant Deepak <anadeepa@cisco.com>
* Author: Cesare Cantu' <cantuc@cisco.com>
* Author: Jeff Squyres <jsquyres@cisco.com>
* Author: Kiran Thirumalai <kithirum@cisco.com>
* Author: Xuyang Wang <xuywang@cisco.com>
* Author: Reese Faucette <rfaucett@cisco.com>
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_addr.h>
#include "usnic_abi.h"
#include "usnic_common_util.h"
#include "usnic_ib.h"
#include "usnic_ib_qp_grp.h"
#include "usnic_log.h"
#include "usnic_fwd.h"
#include "usnic_debugfs.h"
#include "usnic_ib_verbs.h"
#include "usnic_transport.h"
#include "usnic_uiom.h"
#include "usnic_ib_sysfs.h"
unsigned int usnic_log_lvl = USNIC_LOG_LVL_ERR;
unsigned int usnic_ib_share_vf = 1;
static const char usnic_version[] =
DRV_NAME ": Cisco VIC (USNIC) Verbs Driver v"
DRV_VERSION " (" DRV_RELDATE ")\n";
static DEFINE_MUTEX(usnic_ib_ibdev_list_lock);
static LIST_HEAD(usnic_ib_ibdev_list);
/* Callback dump funcs */
static int usnic_ib_dump_vf_hdr(void *obj, char *buf, int buf_sz)
{
struct usnic_ib_vf *vf = obj;
return scnprintf(buf, buf_sz, "PF: %s ", vf->pf->ib_dev.name);
}
/* End callback dump funcs */
static void usnic_ib_dump_vf(struct usnic_ib_vf *vf, char *buf, int buf_sz)
{
usnic_vnic_dump(vf->vnic, buf, buf_sz, vf,
usnic_ib_dump_vf_hdr,
usnic_ib_qp_grp_dump_hdr, usnic_ib_qp_grp_dump_rows);
}
void usnic_ib_log_vf(struct usnic_ib_vf *vf)
{
char buf[1000];
usnic_ib_dump_vf(vf, buf, sizeof(buf));
usnic_dbg("%s\n", buf);
}
/* Start of netdev section */
static inline const char *usnic_ib_netdev_event_to_string(unsigned long event)
{
const char *event2str[] = {"NETDEV_NONE", "NETDEV_UP", "NETDEV_DOWN",
"NETDEV_REBOOT", "NETDEV_CHANGE",
"NETDEV_REGISTER", "NETDEV_UNREGISTER", "NETDEV_CHANGEMTU",
"NETDEV_CHANGEADDR", "NETDEV_GOING_DOWN", "NETDEV_FEAT_CHANGE",
"NETDEV_BONDING_FAILOVER", "NETDEV_PRE_UP",
"NETDEV_PRE_TYPE_CHANGE", "NETDEV_POST_TYPE_CHANGE",
"NETDEV_POST_INT", "NETDEV_UNREGISTER_FINAL", "NETDEV_RELEASE",
"NETDEV_NOTIFY_PEERS", "NETDEV_JOIN"
};
if (event >= ARRAY_SIZE(event2str))
return "UNKNOWN_NETDEV_EVENT";
else
return event2str[event];
}
static void usnic_ib_qp_grp_modify_active_to_err(struct usnic_ib_dev *us_ibdev)
{
struct usnic_ib_ucontext *ctx;
struct usnic_ib_qp_grp *qp_grp;
enum ib_qp_state cur_state;
int status;
BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
list_for_each_entry(ctx, &us_ibdev->ctx_list, link) {
list_for_each_entry(qp_grp, &ctx->qp_grp_list, link) {
cur_state = qp_grp->state;
if (cur_state == IB_QPS_INIT ||
cur_state == IB_QPS_RTR ||
cur_state == IB_QPS_RTS) {
status = usnic_ib_qp_grp_modify(qp_grp,
IB_QPS_ERR,
NULL);
if (status) {
usnic_err("Failed to transistion qp grp %u from %s to %s\n",
qp_grp->grp_id,
usnic_ib_qp_grp_state_to_string
(cur_state),
usnic_ib_qp_grp_state_to_string
(IB_QPS_ERR));
}
}
}
}
}
static void usnic_ib_handle_usdev_event(struct usnic_ib_dev *us_ibdev,
unsigned long event)
{
struct net_device *netdev;
struct ib_event ib_event;
memset(&ib_event, 0, sizeof(ib_event));
mutex_lock(&us_ibdev->usdev_lock);
netdev = us_ibdev->netdev;
switch (event) {
case NETDEV_REBOOT:
usnic_info("PF Reset on %s\n", us_ibdev->ib_dev.name);
usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
ib_event.event = IB_EVENT_PORT_ERR;
ib_event.device = &us_ibdev->ib_dev;
ib_event.element.port_num = 1;
ib_dispatch_event(&ib_event);
break;
case NETDEV_UP:
case NETDEV_DOWN:
case NETDEV_CHANGE:
if (!us_ibdev->link_up && netif_carrier_ok(netdev)) {
us_ibdev->link_up = true;
usnic_info("Link UP on %s\n", us_ibdev->ib_dev.name);
ib_event.event = IB_EVENT_PORT_ACTIVE;
ib_event.device = &us_ibdev->ib_dev;
ib_event.element.port_num = 1;
ib_dispatch_event(&ib_event);
} else if (us_ibdev->link_up && !netif_carrier_ok(netdev)) {
us_ibdev->link_up = false;
usnic_info("Link DOWN on %s\n", us_ibdev->ib_dev.name);
usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
ib_event.event = IB_EVENT_PORT_ERR;
ib_event.device = &us_ibdev->ib_dev;
ib_event.element.port_num = 1;
ib_dispatch_event(&ib_event);
} else {
usnic_dbg("Ignorning %s on %s\n",
usnic_ib_netdev_event_to_string(event),
us_ibdev->ib_dev.name);
}
break;
case NETDEV_CHANGEADDR:
if (!memcmp(us_ibdev->mac, netdev->dev_addr,
sizeof(us_ibdev->mac))) {
usnic_dbg("Ignorning addr change on %s\n",
us_ibdev->ib_dev.name);
} else {
usnic_info(" %s old mac: %pM new mac: %pM\n",
us_ibdev->ib_dev.name,
us_ibdev->mac,
netdev->dev_addr);
memcpy(us_ibdev->mac, netdev->dev_addr,
sizeof(us_ibdev->mac));
usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
ib_event.event = IB_EVENT_GID_CHANGE;
ib_event.device = &us_ibdev->ib_dev;
ib_event.element.port_num = 1;
ib_dispatch_event(&ib_event);
}
break;
case NETDEV_CHANGEMTU:
if (us_ibdev->mtu != netdev->mtu) {
usnic_info("MTU Change on %s old: %u new: %u\n",
us_ibdev->ib_dev.name,
us_ibdev->mtu, netdev->mtu);
us_ibdev->mtu = netdev->mtu;
usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
} else {
usnic_dbg("Ignoring MTU change on %s\n",
us_ibdev->ib_dev.name);
}
break;
default:
usnic_dbg("Ignorning event %s on %s",
usnic_ib_netdev_event_to_string(event),
us_ibdev->ib_dev.name);
}
mutex_unlock(&us_ibdev->usdev_lock);
}
static int usnic_ib_netdevice_event(struct notifier_block *notifier,
unsigned long event, void *ptr)
{
struct usnic_ib_dev *us_ibdev;
struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
mutex_lock(&usnic_ib_ibdev_list_lock);
list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) {
if (us_ibdev->netdev == netdev) {
usnic_ib_handle_usdev_event(us_ibdev, event);
break;
}
}
mutex_unlock(&usnic_ib_ibdev_list_lock);
return NOTIFY_DONE;
}
static struct notifier_block usnic_ib_netdevice_notifier = {
.notifier_call = usnic_ib_netdevice_event
};
/* End of netdev section */
/* Start of PF discovery section */
static void *usnic_ib_device_add(struct pci_dev *dev)
{
struct usnic_ib_dev *us_ibdev;
union ib_gid gid;
usnic_dbg("\n");
us_ibdev = (struct usnic_ib_dev *)ib_alloc_device(sizeof(*us_ibdev));
if (IS_ERR_OR_NULL(us_ibdev)) {
usnic_err("Device %s context alloc failed\n",
netdev_name(pci_get_drvdata(dev)));
return ERR_PTR(us_ibdev ? PTR_ERR(us_ibdev) : -EFAULT);
}
us_ibdev->ufdev = usnic_fwd_dev_alloc(dev);
if (IS_ERR_OR_NULL(us_ibdev->ufdev)) {
usnic_err("Failed to alloc ufdev for %s with err %ld\n",
pci_name(dev), PTR_ERR(us_ibdev->ufdev));
goto err_dealloc;
}
mutex_init(&us_ibdev->usdev_lock);
INIT_LIST_HEAD(&us_ibdev->vf_dev_list);
INIT_LIST_HEAD(&us_ibdev->ctx_list);
us_ibdev->pdev = dev;
us_ibdev->netdev = pci_get_drvdata(dev);
us_ibdev->ib_dev.owner = THIS_MODULE;
us_ibdev->ib_dev.node_type = RDMA_NODE_USNIC;
us_ibdev->ib_dev.phys_port_cnt = USNIC_IB_PORT_CNT;
us_ibdev->ib_dev.num_comp_vectors = USNIC_IB_NUM_COMP_VECTORS;
us_ibdev->ib_dev.dma_device = &dev->dev;
us_ibdev->ib_dev.uverbs_abi_ver = USNIC_UVERBS_ABI_VERSION;
strlcpy(us_ibdev->ib_dev.name, "usnic_%d", IB_DEVICE_NAME_MAX);
us_ibdev->ib_dev.uverbs_cmd_mask =
(1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
(1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
(1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
(1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
(1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
(1ull << IB_USER_VERBS_CMD_REG_MR) |
(1ull << IB_USER_VERBS_CMD_DEREG_MR) |
(1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
(1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
(1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
(1ull << IB_USER_VERBS_CMD_CREATE_QP) |
(1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
(1ull << IB_USER_VERBS_CMD_QUERY_QP) |
(1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
(1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
(1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
(1ull << IB_USER_VERBS_CMD_OPEN_QP);
us_ibdev->ib_dev.query_device = usnic_ib_query_device;
us_ibdev->ib_dev.query_port = usnic_ib_query_port;
us_ibdev->ib_dev.query_pkey = usnic_ib_query_pkey;
us_ibdev->ib_dev.query_gid = usnic_ib_query_gid;
us_ibdev->ib_dev.get_link_layer = usnic_ib_port_link_layer;
us_ibdev->ib_dev.alloc_pd = usnic_ib_alloc_pd;
us_ibdev->ib_dev.dealloc_pd = usnic_ib_dealloc_pd;
us_ibdev->ib_dev.create_qp = usnic_ib_create_qp;
us_ibdev->ib_dev.modify_qp = usnic_ib_modify_qp;
us_ibdev->ib_dev.query_qp = usnic_ib_query_qp;
us_ibdev->ib_dev.destroy_qp = usnic_ib_destroy_qp;
us_ibdev->ib_dev.create_cq = usnic_ib_create_cq;
us_ibdev->ib_dev.destroy_cq = usnic_ib_destroy_cq;
us_ibdev->ib_dev.reg_user_mr = usnic_ib_reg_mr;
us_ibdev->ib_dev.dereg_mr = usnic_ib_dereg_mr;
us_ibdev->ib_dev.alloc_ucontext = usnic_ib_alloc_ucontext;
us_ibdev->ib_dev.dealloc_ucontext = usnic_ib_dealloc_ucontext;
us_ibdev->ib_dev.mmap = usnic_ib_mmap;
us_ibdev->ib_dev.create_ah = usnic_ib_create_ah;
us_ibdev->ib_dev.destroy_ah = usnic_ib_destroy_ah;
us_ibdev->ib_dev.post_send = usnic_ib_post_send;
us_ibdev->ib_dev.post_recv = usnic_ib_post_recv;
us_ibdev->ib_dev.poll_cq = usnic_ib_poll_cq;
us_ibdev->ib_dev.req_notify_cq = usnic_ib_req_notify_cq;
us_ibdev->ib_dev.get_dma_mr = usnic_ib_get_dma_mr;
if (ib_register_device(&us_ibdev->ib_dev, NULL))
goto err_fwd_dealloc;
us_ibdev->link_up = netif_carrier_ok(us_ibdev->netdev);
us_ibdev->mtu = us_ibdev->netdev->mtu;
memcpy(&us_ibdev->mac, us_ibdev->netdev->dev_addr,
sizeof(us_ibdev->mac));
usnic_mac_to_gid(us_ibdev->netdev->perm_addr, &gid.raw[0]);
memcpy(&us_ibdev->ib_dev.node_guid, &gid.global.interface_id,
sizeof(gid.global.interface_id));
kref_init(&us_ibdev->vf_cnt);
usnic_info("Added ibdev: %s netdev: %s with mac %pM Link: %u MTU: %u\n",
us_ibdev->ib_dev.name, netdev_name(us_ibdev->netdev),
us_ibdev->mac, us_ibdev->link_up, us_ibdev->mtu);
return us_ibdev;
err_fwd_dealloc:
usnic_fwd_dev_free(us_ibdev->ufdev);
err_dealloc:
usnic_err("failed -- deallocing device\n");
ib_dealloc_device(&us_ibdev->ib_dev);
return NULL;
}
static void usnic_ib_device_remove(struct usnic_ib_dev *us_ibdev)
{
usnic_info("Unregistering %s\n", us_ibdev->ib_dev.name);
usnic_ib_sysfs_unregister_usdev(us_ibdev);
usnic_fwd_dev_free(us_ibdev->ufdev);
ib_unregister_device(&us_ibdev->ib_dev);
ib_dealloc_device(&us_ibdev->ib_dev);
}
static void usnic_ib_undiscover_pf(struct kref *kref)
{
struct usnic_ib_dev *us_ibdev, *tmp;
struct pci_dev *dev;
bool found = false;
dev = container_of(kref, struct usnic_ib_dev, vf_cnt)->pdev;
mutex_lock(&usnic_ib_ibdev_list_lock);
list_for_each_entry_safe(us_ibdev, tmp,
&usnic_ib_ibdev_list, ib_dev_link) {
if (us_ibdev->pdev == dev) {
list_del(&us_ibdev->ib_dev_link);
usnic_ib_device_remove(us_ibdev);
found = true;
break;
}
}
WARN(!found, "Failed to remove PF %s\n", pci_name(dev));
mutex_unlock(&usnic_ib_ibdev_list_lock);
}
static struct usnic_ib_dev *usnic_ib_discover_pf(struct usnic_vnic *vnic)
{
struct usnic_ib_dev *us_ibdev;
struct pci_dev *parent_pci, *vf_pci;
int err;
vf_pci = usnic_vnic_get_pdev(vnic);
parent_pci = pci_physfn(vf_pci);
BUG_ON(!parent_pci);
mutex_lock(&usnic_ib_ibdev_list_lock);
list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) {
if (us_ibdev->pdev == parent_pci) {
kref_get(&us_ibdev->vf_cnt);
goto out;
}
}
us_ibdev = usnic_ib_device_add(parent_pci);
if (IS_ERR_OR_NULL(us_ibdev)) {
us_ibdev = (us_ibdev) ? us_ibdev : ERR_PTR(-EFAULT);
goto out;
}
err = usnic_ib_sysfs_register_usdev(us_ibdev);
if (err) {
usnic_ib_device_remove(us_ibdev);
us_ibdev = ERR_PTR(err);
goto out;
}
list_add(&us_ibdev->ib_dev_link, &usnic_ib_ibdev_list);
out:
mutex_unlock(&usnic_ib_ibdev_list_lock);
return us_ibdev;
}
/* End of PF discovery section */
/* Start of PCI section */
static DEFINE_PCI_DEVICE_TABLE(usnic_ib_pci_ids) = {
{PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC)},
{0,}
};
static int usnic_ib_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
int err;
struct usnic_ib_dev *pf;
struct usnic_ib_vf *vf;
enum usnic_vnic_res_type res_type;
vf = kzalloc(sizeof(*vf), GFP_KERNEL);
if (!vf)
return -ENOMEM;
err = pci_enable_device(pdev);
if (err) {
usnic_err("Failed to enable %s with err %d\n",
pci_name(pdev), err);
goto out_clean_vf;
}
err = pci_request_regions(pdev, DRV_NAME);
if (err) {
usnic_err("Failed to request region for %s with err %d\n",
pci_name(pdev), err);
goto out_disable_device;
}
pci_set_master(pdev);
pci_set_drvdata(pdev, vf);
vf->vnic = usnic_vnic_alloc(pdev);
if (IS_ERR_OR_NULL(vf->vnic)) {
err = (vf->vnic ? PTR_ERR(vf->vnic) : -ENOMEM);
usnic_err("Failed to alloc vnic for %s with err %d\n",
pci_name(pdev), err);
goto out_release_regions;
}
pf = usnic_ib_discover_pf(vf->vnic);
if (IS_ERR_OR_NULL(pf)) {
usnic_err("Failed to discover pf of vnic %s with err%ld\n",
pci_name(pdev), PTR_ERR(pf));
err = (pf ? PTR_ERR(pf) : -EFAULT);
goto out_clean_vnic;
}
vf->pf = pf;
spin_lock_init(&vf->lock);
mutex_lock(&pf->usdev_lock);
list_add_tail(&vf->link, &pf->vf_dev_list);
/*
* Save max settings (will be same for each VF, easier to re-write than
* to say "if (!set) { set_values(); set=1; }
*/
for (res_type = USNIC_VNIC_RES_TYPE_EOL+1;
res_type < USNIC_VNIC_RES_TYPE_MAX;
res_type++) {
pf->vf_res_cnt[res_type] = usnic_vnic_res_cnt(vf->vnic,
res_type);
}
mutex_unlock(&pf->usdev_lock);
usnic_info("Registering usnic VF %s into PF %s\n", pci_name(pdev),
pf->ib_dev.name);
usnic_ib_log_vf(vf);
return 0;
out_clean_vnic:
usnic_vnic_free(vf->vnic);
out_release_regions:
pci_set_drvdata(pdev, NULL);
pci_clear_master(pdev);
pci_release_regions(pdev);
out_disable_device:
pci_disable_device(pdev);
out_clean_vf:
kfree(vf);
return err;
}
static void usnic_ib_pci_remove(struct pci_dev *pdev)
{
struct usnic_ib_vf *vf = pci_get_drvdata(pdev);
struct usnic_ib_dev *pf = vf->pf;
mutex_lock(&pf->usdev_lock);
list_del(&vf->link);
mutex_unlock(&pf->usdev_lock);
kref_put(&pf->vf_cnt, usnic_ib_undiscover_pf);
usnic_vnic_free(vf->vnic);
pci_set_drvdata(pdev, NULL);
pci_clear_master(pdev);
pci_release_regions(pdev);
pci_disable_device(pdev);
kfree(vf);
usnic_info("Removed VF %s\n", pci_name(pdev));
}
/* PCI driver entry points */
static struct pci_driver usnic_ib_pci_driver = {
.name = DRV_NAME,
.id_table = usnic_ib_pci_ids,
.probe = usnic_ib_pci_probe,
.remove = usnic_ib_pci_remove,
};
/* End of PCI section */
/* Start of module section */
static int __init usnic_ib_init(void)
{
int err;
printk_once(KERN_INFO "%s", usnic_version);
err = usnic_uiom_init(DRV_NAME);
if (err) {
usnic_err("Unable to initalize umem with err %d\n", err);
return err;
}
if (pci_register_driver(&usnic_ib_pci_driver)) {
usnic_err("Unable to register with PCI\n");
goto out_umem_fini;
}
err = register_netdevice_notifier(&usnic_ib_netdevice_notifier);
if (err) {
usnic_err("Failed to register netdev notifier\n");
goto out_pci_unreg;
}
err = usnic_transport_init();
if (err) {
usnic_err("Failed to initialize transport\n");
goto out_unreg_netdev_notifier;
}
usnic_debugfs_init();
return 0;
out_unreg_netdev_notifier:
unregister_netdevice_notifier(&usnic_ib_netdevice_notifier);
out_pci_unreg:
pci_unregister_driver(&usnic_ib_pci_driver);
out_umem_fini:
usnic_uiom_fini();
return err;
}
static void __exit usnic_ib_destroy(void)
{
usnic_dbg("\n");
usnic_debugfs_exit();
usnic_transport_fini();
unregister_netdevice_notifier(&usnic_ib_netdevice_notifier);
pci_unregister_driver(&usnic_ib_pci_driver);
usnic_uiom_fini();
}
MODULE_DESCRIPTION("Cisco VIC (usNIC) Verbs Driver");
MODULE_AUTHOR("Upinder Malhi <umalhi@cisco.com>");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(DRV_VERSION);
module_param(usnic_log_lvl, uint, S_IRUGO | S_IWUSR);
module_param(usnic_ib_share_vf, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(usnic_log_lvl, " Off=0, Err=1, Info=2, Debug=3");
MODULE_PARM_DESC(usnic_ib_share_vf, "Off=0, On=1 VF sharing amongst QPs");
MODULE_DEVICE_TABLE(pci, usnic_ib_pci_ids);
module_init(usnic_ib_init);
module_exit(usnic_ib_destroy);
/* End of module section */

541
drivers/infiniband/hw/usnic/usnic_ib_qp_grp.c 100644
View File

@ -0,0 +1,541 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include "usnic_log.h"
#include "usnic_vnic.h"
#include "usnic_fwd.h"
#include "usnic_uiom.h"
#include "usnic_ib_qp_grp.h"
#include "usnic_ib_sysfs.h"
#include "usnic_transport.h"
const char *usnic_ib_qp_grp_state_to_string(enum ib_qp_state state)
{
switch (state) {
case IB_QPS_RESET:
return "Rst";
case IB_QPS_INIT:
return "Init";
case IB_QPS_RTR:
return "RTR";
case IB_QPS_RTS:
return "RTS";
case IB_QPS_SQD:
return "SQD";
case IB_QPS_SQE:
return "SQE";
case IB_QPS_ERR:
return "ERR";
default:
return "UNKOWN STATE";
}
}
int usnic_ib_qp_grp_dump_hdr(char *buf, int buf_sz)
{
return scnprintf(buf, buf_sz, "|QPN\t|State\t|PID\t|VF Idx\t|Fil ID");
}
int usnic_ib_qp_grp_dump_rows(void *obj, char *buf, int buf_sz)
{
struct usnic_ib_qp_grp *qp_grp = obj;
struct usnic_fwd_filter_hndl *default_filter_hndl;
if (obj) {
default_filter_hndl = list_first_entry(&qp_grp->filter_hndls,
struct usnic_fwd_filter_hndl, link);
return scnprintf(buf, buf_sz, "|%d\t|%s\t|%d\t|%hu\t|%d",
qp_grp->ibqp.qp_num,
usnic_ib_qp_grp_state_to_string(
qp_grp->state),
qp_grp->owner_pid,
usnic_vnic_get_index(qp_grp->vf->vnic),
default_filter_hndl->id);
} else {
return scnprintf(buf, buf_sz, "|N/A\t|N/A\t|N/A\t|N/A\t|N/A");
}
}
static int add_fwd_filter(struct usnic_ib_qp_grp *qp_grp,
struct usnic_fwd_filter *fwd_filter)
{
struct usnic_fwd_filter_hndl *filter_hndl;
int status;
struct usnic_vnic_res_chunk *chunk;
int rq_idx;
WARN_ON(!spin_is_locked(&qp_grp->lock));
chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ);
if (IS_ERR_OR_NULL(chunk) || chunk->cnt < 1) {
usnic_err("Failed to get RQ info for qp_grp %u\n",
qp_grp->grp_id);
return -EFAULT;
}
rq_idx = chunk->res[0]->vnic_idx;
switch (qp_grp->transport) {
case USNIC_TRANSPORT_ROCE_CUSTOM:
status = usnic_fwd_add_usnic_filter(qp_grp->ufdev,
usnic_vnic_get_index(qp_grp->vf->vnic),
rq_idx,
fwd_filter,
&filter_hndl);
break;
default:
usnic_err("Unable to install filter for qp_grp %u for transport %d",
qp_grp->grp_id, qp_grp->transport);
status = -EINVAL;
}
if (status)
return status;
list_add_tail(&filter_hndl->link, &qp_grp->filter_hndls);
return 0;
}
static int del_all_filters(struct usnic_ib_qp_grp *qp_grp)
{
int err, status;
struct usnic_fwd_filter_hndl *filter_hndl, *tmp;
WARN_ON(!spin_is_locked(&qp_grp->lock));
status = 0;
list_for_each_entry_safe(filter_hndl, tmp,
&qp_grp->filter_hndls, link) {
list_del(&filter_hndl->link);
err = usnic_fwd_del_filter(filter_hndl);
if (err) {
usnic_err("Failed to delete filter %u of qp_grp %d\n",
filter_hndl->id, qp_grp->grp_id);
}
status |= err;
}
return status;
}
static int enable_qp_grp(struct usnic_ib_qp_grp *qp_grp)
{
int status;
int i, vnic_idx;
struct usnic_vnic_res_chunk *res_chunk;
struct usnic_vnic_res *res;
WARN_ON(!spin_is_locked(&qp_grp->lock));
vnic_idx = usnic_vnic_get_index(qp_grp->vf->vnic);
res_chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ);
if (IS_ERR_OR_NULL(res_chunk)) {
usnic_err("Unable to get %s with err %ld\n",
usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ),
PTR_ERR(res_chunk));
return res_chunk ? PTR_ERR(res_chunk) : -ENOMEM;
}
for (i = 0; i < res_chunk->cnt; i++) {
res = res_chunk->res[i];
status = usnic_fwd_enable_rq(qp_grp->ufdev, vnic_idx,
res->vnic_idx);
if (status) {
usnic_err("Failed to enable rq %d of %s:%d\n with err %d\n",
res->vnic_idx,
netdev_name(qp_grp->ufdev->netdev),
vnic_idx, status);
goto out_err;
}
}
return 0;
out_err:
for (i--; i >= 0; i--) {
res = res_chunk->res[i];
usnic_fwd_disable_rq(qp_grp->ufdev, vnic_idx,
res->vnic_idx);
}
return status;
}
static int disable_qp_grp(struct usnic_ib_qp_grp *qp_grp)
{
int i, vnic_idx;
struct usnic_vnic_res_chunk *res_chunk;
struct usnic_vnic_res *res;
int status = 0;
WARN_ON(!spin_is_locked(&qp_grp->lock));
vnic_idx = usnic_vnic_get_index(qp_grp->vf->vnic);
res_chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ);
if (IS_ERR_OR_NULL(res_chunk)) {
usnic_err("Unable to get %s with err %ld\n",
usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ),
PTR_ERR(res_chunk));
return res_chunk ? PTR_ERR(res_chunk) : -ENOMEM;
}
for (i = 0; i < res_chunk->cnt; i++) {
res = res_chunk->res[i];
status = usnic_fwd_disable_rq(qp_grp->ufdev, vnic_idx,
res->vnic_idx);
if (status) {
usnic_err("Failed to disable rq %d of %s:%d\n with err %d\n",
res->vnic_idx,
netdev_name(qp_grp->ufdev->netdev),
vnic_idx, status);
}
}
return status;
}
int usnic_ib_qp_grp_modify(struct usnic_ib_qp_grp *qp_grp,
enum ib_qp_state new_state,
struct usnic_fwd_filter *fwd_filter)
{
int status = 0;
int vnic_idx;
struct ib_event ib_event;
enum ib_qp_state old_state;
old_state = qp_grp->state;
vnic_idx = usnic_vnic_get_index(qp_grp->vf->vnic);
spin_lock(&qp_grp->lock);
switch (new_state) {
case IB_QPS_RESET:
switch (old_state) {
case IB_QPS_RESET:
/* NO-OP */
break;
case IB_QPS_INIT:
status = del_all_filters(qp_grp);
break;
case IB_QPS_RTR:
case IB_QPS_RTS:
case IB_QPS_ERR:
status = disable_qp_grp(qp_grp);
status &= del_all_filters(qp_grp);
break;
default:
status = -EINVAL;
}
break;
case IB_QPS_INIT:
switch (old_state) {
case IB_QPS_RESET:
status = add_fwd_filter(qp_grp, fwd_filter);
break;
case IB_QPS_INIT:
status = add_fwd_filter(qp_grp, fwd_filter);
break;
case IB_QPS_RTR:
status = disable_qp_grp(qp_grp);
break;
case IB_QPS_RTS:
status = disable_qp_grp(qp_grp);
break;
default:
status = -EINVAL;
}
break;
case IB_QPS_RTR:
switch (old_state) {
case IB_QPS_INIT:
status = enable_qp_grp(qp_grp);
break;
default:
status = -EINVAL;
}
break;
case IB_QPS_RTS:
switch (old_state) {
case IB_QPS_RTR:
/* NO-OP FOR NOW */
break;
default:
status = -EINVAL;
}
break;
case IB_QPS_ERR:
ib_event.device = &qp_grp->vf->pf->ib_dev;
ib_event.element.qp = &qp_grp->ibqp;
ib_event.event = IB_EVENT_QP_FATAL;
switch (old_state) {
case IB_QPS_RESET:
qp_grp->ibqp.event_handler(&ib_event,
qp_grp->ibqp.qp_context);
break;
case IB_QPS_INIT:
status = del_all_filters(qp_grp);
qp_grp->ibqp.event_handler(&ib_event,
qp_grp->ibqp.qp_context);
break;
case IB_QPS_RTR:
case IB_QPS_RTS:
status = disable_qp_grp(qp_grp);
status &= del_all_filters(qp_grp);
qp_grp->ibqp.event_handler(&ib_event,
qp_grp->ibqp.qp_context);
break;
default:
status = -EINVAL;
}
break;
default:
status = -EINVAL;
}
spin_unlock(&qp_grp->lock);
if (!status) {
qp_grp->state = new_state;
usnic_info("Transistioned %u from %s to %s",
qp_grp->grp_id,
usnic_ib_qp_grp_state_to_string(old_state),
usnic_ib_qp_grp_state_to_string(new_state));
} else {
usnic_err("Failed to transistion %u from %s to %s",
qp_grp->grp_id,
usnic_ib_qp_grp_state_to_string(old_state),
usnic_ib_qp_grp_state_to_string(new_state));
}
return status;
}
static struct usnic_vnic_res_chunk**
alloc_res_chunk_list(struct usnic_vnic *vnic,
struct usnic_vnic_res_spec *res_spec, void *owner_obj)
{
enum usnic_vnic_res_type res_type;
struct usnic_vnic_res_chunk **res_chunk_list;
int err, i, res_cnt, res_lst_sz;
for (res_lst_sz = 0;
res_spec->resources[res_lst_sz].type != USNIC_VNIC_RES_TYPE_EOL;
res_lst_sz++) {
/* Do Nothing */
}
res_chunk_list = kzalloc(sizeof(*res_chunk_list)*(res_lst_sz+1),
GFP_ATOMIC);
if (!res_chunk_list)
return ERR_PTR(-ENOMEM);
for (i = 0; res_spec->resources[i].type != USNIC_VNIC_RES_TYPE_EOL;
i++) {
res_type = res_spec->resources[i].type;
res_cnt = res_spec->resources[i].cnt;
res_chunk_list[i] = usnic_vnic_get_resources(vnic, res_type,
res_cnt, owner_obj);
if (IS_ERR_OR_NULL(res_chunk_list[i])) {
err = (res_chunk_list[i] ?
PTR_ERR(res_chunk_list[i]) : -ENOMEM);
usnic_err("Failed to get %s from %s with err %d\n",
usnic_vnic_res_type_to_str(res_type),
usnic_vnic_pci_name(vnic),
err);
goto out_free_res;
}
}
return res_chunk_list;
out_free_res:
for (i--; i > 0; i--)
usnic_vnic_put_resources(res_chunk_list[i]);
kfree(res_chunk_list);
return ERR_PTR(err);
}
static void free_qp_grp_res(struct usnic_vnic_res_chunk **res_chunk_list)
{
int i;
for (i = 0; res_chunk_list[i]; i++)
usnic_vnic_put_resources(res_chunk_list[i]);
kfree(res_chunk_list);
}
static int qp_grp_and_vf_bind(struct usnic_ib_vf *vf,
struct usnic_ib_pd *pd,
struct usnic_ib_qp_grp *qp_grp)
{
int err;
struct pci_dev *pdev;
WARN_ON(!spin_is_locked(&vf->lock));
pdev = usnic_vnic_get_pdev(vf->vnic);
if (vf->qp_grp_ref_cnt == 0) {
err = usnic_uiom_attach_dev_to_pd(pd->umem_pd, &pdev->dev);
if (err) {
usnic_err("Failed to attach %s to domain\n",
pci_name(pdev));
return err;
}
vf->pd = pd;
}
vf->qp_grp_ref_cnt++;
WARN_ON(vf->pd != pd);
qp_grp->vf = vf;
return 0;
}
static void qp_grp_and_vf_unbind(struct usnic_ib_qp_grp *qp_grp)
{
struct pci_dev *pdev;
struct usnic_ib_pd *pd;
WARN_ON(!spin_is_locked(&qp_grp->vf->lock));
pd = qp_grp->vf->pd;
pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic);
if (--qp_grp->vf->qp_grp_ref_cnt == 0) {
qp_grp->vf->pd = NULL;
usnic_uiom_detach_dev_from_pd(pd->umem_pd, &pdev->dev);
}
qp_grp->vf = NULL;
}
static void log_spec(struct usnic_vnic_res_spec *res_spec)
{
char buf[512];
usnic_vnic_spec_dump(buf, sizeof(buf), res_spec);
usnic_dbg("%s\n", buf);
}
struct usnic_ib_qp_grp *
usnic_ib_qp_grp_create(struct usnic_fwd_dev *ufdev,
struct usnic_ib_vf *vf,
struct usnic_ib_pd *pd,
struct usnic_vnic_res_spec *res_spec,
enum usnic_transport_type transport)
{
struct usnic_ib_qp_grp *qp_grp;
u16 port_num;
int err;
WARN_ON(!spin_is_locked(&vf->lock));
err = usnic_vnic_res_spec_satisfied(&min_transport_spec[transport],
res_spec);
if (err) {
usnic_err("Spec does not meet miniumum req for transport %d\n",
transport);
log_spec(res_spec);
return ERR_PTR(err);
}
port_num = usnic_transport_rsrv_port(transport, 0);
if (!port_num) {
usnic_err("Unable to allocate port for %s\n",
netdev_name(ufdev->netdev));
return ERR_PTR(-EINVAL);
}
qp_grp = kzalloc(sizeof(*qp_grp), GFP_ATOMIC);
if (!qp_grp) {
usnic_err("Unable to alloc qp_grp - Out of memory\n");
return NULL;
}
qp_grp->res_chunk_list = alloc_res_chunk_list(vf->vnic, res_spec,
qp_grp);
if (IS_ERR_OR_NULL(qp_grp->res_chunk_list)) {
err = qp_grp->res_chunk_list ?
PTR_ERR(qp_grp->res_chunk_list) : -ENOMEM;
usnic_err("Unable to alloc res for %d with err %d\n",
qp_grp->grp_id, err);
goto out_free_port;
}
INIT_LIST_HEAD(&qp_grp->filter_hndls);
spin_lock_init(&qp_grp->lock);
qp_grp->ufdev = ufdev;
qp_grp->transport = transport;
qp_grp->filters[DFLT_FILTER_IDX].transport = transport;
qp_grp->filters[DFLT_FILTER_IDX].port_num = port_num;
qp_grp->state = IB_QPS_RESET;
qp_grp->owner_pid = current->pid;
/* qp_num is same as default filter port_num */
qp_grp->ibqp.qp_num = qp_grp->filters[DFLT_FILTER_IDX].port_num;
qp_grp->grp_id = qp_grp->ibqp.qp_num;
err = qp_grp_and_vf_bind(vf, pd, qp_grp);
if (err)
goto out_free_port;
usnic_ib_sysfs_qpn_add(qp_grp);
return qp_grp;
out_free_port:
kfree(qp_grp);
usnic_transport_unrsrv_port(transport, port_num);
return ERR_PTR(err);
}
void usnic_ib_qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp)
{
u16 default_port_num;
enum usnic_transport_type transport;
WARN_ON(qp_grp->state != IB_QPS_RESET);
WARN_ON(!spin_is_locked(&qp_grp->vf->lock));
transport = qp_grp->filters[DFLT_FILTER_IDX].transport;
default_port_num = qp_grp->filters[DFLT_FILTER_IDX].port_num;
usnic_ib_sysfs_qpn_remove(qp_grp);
qp_grp_and_vf_unbind(qp_grp);
free_qp_grp_res(qp_grp->res_chunk_list);
kfree(qp_grp);
usnic_transport_unrsrv_port(transport, default_port_num);
}
struct usnic_vnic_res_chunk*
usnic_ib_qp_grp_get_chunk(struct usnic_ib_qp_grp *qp_grp,
enum usnic_vnic_res_type res_type)
{
int i;
for (i = 0; qp_grp->res_chunk_list[i]; i++) {
if (qp_grp->res_chunk_list[i]->type == res_type)
return qp_grp->res_chunk_list[i];
}
return ERR_PTR(-EINVAL);
}

95
drivers/infiniband/hw/usnic/usnic_ib_qp_grp.h 100644
View File

@ -0,0 +1,95 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_IB_QP_GRP_H_
#define USNIC_IB_QP_GRP_H_
#include <rdma/ib_verbs.h>
#include "usnic_ib.h"
#include "usnic_abi.h"
#include "usnic_fwd.h"
#include "usnic_vnic.h"
#define MAX_QP_GRP_FILTERS 10
#define DFLT_FILTER_IDX 0
/*
* The qp group struct represents all the hw resources needed to present a ib_qp
*/
struct usnic_ib_qp_grp {
struct ib_qp ibqp;
enum ib_qp_state state;
int grp_id;
struct usnic_fwd_dev *ufdev;
short unsigned filter_cnt;
struct usnic_fwd_filter filters[MAX_QP_GRP_FILTERS];
struct list_head filter_hndls;
enum usnic_transport_type transport;
struct usnic_ib_ucontext *ctx;
struct usnic_vnic_res_chunk **res_chunk_list;
pid_t owner_pid;
struct usnic_ib_vf *vf;
struct list_head link;
spinlock_t lock;
struct kobject kobj;
};
static const struct
usnic_vnic_res_spec min_transport_spec[USNIC_TRANSPORT_MAX] = {
{ /*USNIC_TRANSPORT_UNKNOWN*/
.resources = {
{.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,},
},
},
{ /*USNIC_TRANSPORT_ROCE_CUSTOM*/
.resources = {
{.type = USNIC_VNIC_RES_TYPE_WQ, .cnt = 1,},
{.type = USNIC_VNIC_RES_TYPE_RQ, .cnt = 1,},
{.type = USNIC_VNIC_RES_TYPE_CQ, .cnt = 1,},
{.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,},
},
},
};
const char *usnic_ib_qp_grp_state_to_string(enum ib_qp_state state);
int usnic_ib_qp_grp_dump_hdr(char *buf, int buf_sz);
int usnic_ib_qp_grp_dump_rows(void *obj, char *buf, int buf_sz);
struct usnic_ib_qp_grp *
usnic_ib_qp_grp_create(struct usnic_fwd_dev *ufdev, struct usnic_ib_vf *vf,
struct usnic_ib_pd *pd,
struct usnic_vnic_res_spec *res_spec,
enum usnic_transport_type transport);
void usnic_ib_qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp);
int usnic_ib_qp_grp_modify(struct usnic_ib_qp_grp *qp_grp,
enum ib_qp_state new_state,
struct usnic_fwd_filter *fwd_filter);
struct usnic_vnic_res_chunk
*usnic_ib_qp_grp_get_chunk(struct usnic_ib_qp_grp *qp_grp,
enum usnic_vnic_res_type type);
static inline
struct usnic_ib_qp_grp *to_uqp_grp(struct ib_qp *ibqp)
{
return container_of(ibqp, struct usnic_ib_qp_grp, ibqp);
}
#endif /* USNIC_IB_QP_GRP_H_ */

351
drivers/infiniband/hw/usnic/usnic_ib_sysfs.c 100644
View File

@ -0,0 +1,351 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_addr.h>
#include "usnic_common_util.h"
#include "usnic_ib.h"
#include "usnic_ib_qp_grp.h"
#include "usnic_vnic.h"
#include "usnic_ib_verbs.h"
#include "usnic_log.h"
#define UPDATE_PTR_LEFT(N, P, L) \
do { \
L -= (N); \
P += (N); \
} while (0)
static ssize_t usnic_ib_show_fw_ver(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct usnic_ib_dev *us_ibdev =
container_of(device, struct usnic_ib_dev, ib_dev.dev);
struct ethtool_drvinfo info;
mutex_lock(&us_ibdev->usdev_lock);
us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
mutex_unlock(&us_ibdev->usdev_lock);
return scnprintf(buf, PAGE_SIZE, "%s\n", info.fw_version);
}
static ssize_t usnic_ib_show_board(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct usnic_ib_dev *us_ibdev =
container_of(device, struct usnic_ib_dev, ib_dev.dev);
unsigned short subsystem_device_id;
mutex_lock(&us_ibdev->usdev_lock);
subsystem_device_id = us_ibdev->pdev->subsystem_device;
mutex_unlock(&us_ibdev->usdev_lock);
return scnprintf(buf, PAGE_SIZE, "%hu\n", subsystem_device_id);
}
/*
* Report the configuration for this PF
*/
static ssize_t
usnic_ib_show_config(struct device *device, struct device_attribute *attr,
char *buf)
{
struct usnic_ib_dev *us_ibdev;
char *ptr;
unsigned left;
unsigned n;
enum usnic_vnic_res_type res_type;
us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev);
/* Buffer space limit is 1 page */
ptr = buf;
left = PAGE_SIZE;
mutex_lock(&us_ibdev->usdev_lock);
if (atomic_read(&us_ibdev->vf_cnt.refcount) > 0) {
char *busname;
/*
* bus name seems to come with annoying prefix.
* Remove it if it is predictable
*/
busname = us_ibdev->pdev->bus->name;
if (strncmp(busname, "PCI Bus ", 8) == 0)
busname += 8;
n = scnprintf(ptr, left,
"%s: %s:%d.%d, %s, %pM, %u VFs\n Per VF:",
us_ibdev->ib_dev.name,
busname,
PCI_SLOT(us_ibdev->pdev->devfn),
PCI_FUNC(us_ibdev->pdev->devfn),
netdev_name(us_ibdev->netdev),
us_ibdev->mac,
atomic_read(&us_ibdev->vf_cnt.refcount));
UPDATE_PTR_LEFT(n, ptr, left);
for (res_type = USNIC_VNIC_RES_TYPE_EOL;
res_type < USNIC_VNIC_RES_TYPE_MAX;
res_type++) {
if (us_ibdev->vf_res_cnt[res_type] == 0)
continue;
n = scnprintf(ptr, left, " %d %s%s",
us_ibdev->vf_res_cnt[res_type],
usnic_vnic_res_type_to_str(res_type),
(res_type < (USNIC_VNIC_RES_TYPE_MAX - 1)) ?
"," : "");
UPDATE_PTR_LEFT(n, ptr, left);
}
n = scnprintf(ptr, left, "\n");
UPDATE_PTR_LEFT(n, ptr, left);
} else {
n = scnprintf(ptr, left, "%s: no VFs\n",
us_ibdev->ib_dev.name);
UPDATE_PTR_LEFT(n, ptr, left);
}
mutex_unlock(&us_ibdev->usdev_lock);
return ptr - buf;
}
static ssize_t
usnic_ib_show_iface(struct device *device, struct device_attribute *attr,
char *buf)
{
struct usnic_ib_dev *us_ibdev;
us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev);
return scnprintf(buf, PAGE_SIZE, "%s\n",
netdev_name(us_ibdev->netdev));
}
static ssize_t
usnic_ib_show_max_vf(struct device *device, struct device_attribute *attr,
char *buf)
{
struct usnic_ib_dev *us_ibdev;
us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev);
return scnprintf(buf, PAGE_SIZE, "%u\n",
atomic_read(&us_ibdev->vf_cnt.refcount));
}
static ssize_t
usnic_ib_show_qp_per_vf(struct device *device, struct device_attribute *attr,
char *buf)
{
struct usnic_ib_dev *us_ibdev;
int qp_per_vf;
us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev);
qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
return scnprintf(buf, PAGE_SIZE,
"%d\n", qp_per_vf);
}
static ssize_t
usnic_ib_show_cq_per_vf(struct device *device, struct device_attribute *attr,
char *buf)
{
struct usnic_ib_dev *us_ibdev;
us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev);
return scnprintf(buf, PAGE_SIZE, "%d\n",
us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ]);
}
static DEVICE_ATTR(fw_ver, S_IRUGO, usnic_ib_show_fw_ver, NULL);
static DEVICE_ATTR(board_id, S_IRUGO, usnic_ib_show_board, NULL);
static DEVICE_ATTR(config, S_IRUGO, usnic_ib_show_config, NULL);
static DEVICE_ATTR(iface, S_IRUGO, usnic_ib_show_iface, NULL);
static DEVICE_ATTR(max_vf, S_IRUGO, usnic_ib_show_max_vf, NULL);
static DEVICE_ATTR(qp_per_vf, S_IRUGO, usnic_ib_show_qp_per_vf, NULL);
static DEVICE_ATTR(cq_per_vf, S_IRUGO, usnic_ib_show_cq_per_vf, NULL);
static struct device_attribute *usnic_class_attributes[] = {
&dev_attr_fw_ver,
&dev_attr_board_id,
&dev_attr_config,
&dev_attr_iface,
&dev_attr_max_vf,
&dev_attr_qp_per_vf,
&dev_attr_cq_per_vf,
};
struct qpn_attribute {
struct attribute attr;
ssize_t (*show)(struct usnic_ib_qp_grp *, char *buf);
};
/*
* Definitions for supporting QPN entries in sysfs
*/
static ssize_t
usnic_ib_qpn_attr_show(struct kobject *kobj, struct attribute *attr, char *buf)
{
struct usnic_ib_qp_grp *qp_grp;
struct qpn_attribute *qpn_attr;
qp_grp = container_of(kobj, struct usnic_ib_qp_grp, kobj);
qpn_attr = container_of(attr, struct qpn_attribute, attr);
return qpn_attr->show(qp_grp, buf);
}
static const struct sysfs_ops usnic_ib_qpn_sysfs_ops = {
.show = usnic_ib_qpn_attr_show
};
#define QPN_ATTR_RO(NAME) \
struct qpn_attribute qpn_attr_##NAME = __ATTR_RO(NAME)
static ssize_t context_show(struct usnic_ib_qp_grp *qp_grp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "0x%p\n", qp_grp->ctx);
}
static ssize_t summary_show(struct usnic_ib_qp_grp *qp_grp, char *buf)
{
int i, j, n;
int left;
char *ptr;
struct usnic_vnic_res_chunk *res_chunk;
struct usnic_fwd_filter_hndl *default_filter_hndl;
struct usnic_vnic_res *vnic_res;
left = PAGE_SIZE;
ptr = buf;
default_filter_hndl = list_first_entry(&qp_grp->filter_hndls,
struct usnic_fwd_filter_hndl, link);
n = scnprintf(ptr, left,
"QPN: %d State: (%s) PID: %u VF Idx: %hu Filter ID: 0x%x ",
qp_grp->ibqp.qp_num,
usnic_ib_qp_grp_state_to_string(qp_grp->state),
qp_grp->owner_pid,
usnic_vnic_get_index(qp_grp->vf->vnic),
default_filter_hndl->id);
UPDATE_PTR_LEFT(n, ptr, left);
for (i = 0; qp_grp->res_chunk_list[i]; i++) {
res_chunk = qp_grp->res_chunk_list[i];
for (j = 0; j < res_chunk->cnt; j++) {
vnic_res = res_chunk->res[j];
n = scnprintf(ptr, left, "%s[%d] ",
usnic_vnic_res_type_to_str(vnic_res->type),
vnic_res->vnic_idx);
UPDATE_PTR_LEFT(n, ptr, left);
}
}
n = scnprintf(ptr, left, "\n");
UPDATE_PTR_LEFT(n, ptr, left);
return ptr - buf;
}
static QPN_ATTR_RO(context);
static QPN_ATTR_RO(summary);
static struct attribute *usnic_ib_qpn_default_attrs[] = {
&qpn_attr_context.attr,
&qpn_attr_summary.attr,
NULL
};
static struct kobj_type usnic_ib_qpn_type = {
.sysfs_ops = &usnic_ib_qpn_sysfs_ops,
.default_attrs = usnic_ib_qpn_default_attrs
};
int usnic_ib_sysfs_register_usdev(struct usnic_ib_dev *us_ibdev)
{
int i;
int err;
for (i = 0; i < ARRAY_SIZE(usnic_class_attributes); ++i) {
err = device_create_file(&us_ibdev->ib_dev.dev,
usnic_class_attributes[i]);
if (err) {
usnic_err("Failed to create device file %d for %s eith err %d",
i, us_ibdev->ib_dev.name, err);
return -EINVAL;
}
}
/* create kernel object for looking at individual QPs */
kobject_get(&us_ibdev->ib_dev.dev.kobj);
us_ibdev->qpn_kobj = kobject_create_and_add("qpn",
&us_ibdev->ib_dev.dev.kobj);
if (us_ibdev->qpn_kobj == NULL) {
kobject_put(&us_ibdev->ib_dev.dev.kobj);
return -ENOMEM;
}
return 0;
}
void usnic_ib_sysfs_unregister_usdev(struct usnic_ib_dev *us_ibdev)
{
int i;
for (i = 0; i < ARRAY_SIZE(usnic_class_attributes); ++i) {
device_remove_file(&us_ibdev->ib_dev.dev,
usnic_class_attributes[i]);
}
kobject_put(us_ibdev->qpn_kobj);
}
void usnic_ib_sysfs_qpn_add(struct usnic_ib_qp_grp *qp_grp)
{
struct usnic_ib_dev *us_ibdev;
int err;
us_ibdev = qp_grp->vf->pf;
err = kobject_init_and_add(&qp_grp->kobj, &usnic_ib_qpn_type,
kobject_get(us_ibdev->qpn_kobj),
"%d", qp_grp->grp_id);
if (err) {
kobject_put(us_ibdev->qpn_kobj);
return;
}
}
void usnic_ib_sysfs_qpn_remove(struct usnic_ib_qp_grp *qp_grp)
{
struct usnic_ib_dev *us_ibdev;
us_ibdev = qp_grp->vf->pf;
kobject_put(&qp_grp->kobj);
kobject_put(us_ibdev->qpn_kobj);
}

29
drivers/infiniband/hw/usnic/usnic_ib_sysfs.h 100644
View File

@ -0,0 +1,29 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_IB_SYSFS_H_
#define USNIC_IB_SYSFS_H_
#include "usnic_ib.h"
int usnic_ib_sysfs_register_usdev(struct usnic_ib_dev *us_ibdev);
void usnic_ib_sysfs_unregister_usdev(struct usnic_ib_dev *us_ibdev);
void usnic_ib_sysfs_qpn_add(struct usnic_ib_qp_grp *qp_grp);
void usnic_ib_sysfs_qpn_remove(struct usnic_ib_qp_grp *qp_grp);
#endif /* !USNIC_IB_SYSFS_H_ */

736
drivers/infiniband/hw/usnic/usnic_ib_verbs.c 100644
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/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_addr.h>
#include "usnic_abi.h"
#include "usnic_ib.h"
#include "usnic_common_util.h"
#include "usnic_ib_qp_grp.h"
#include "usnic_fwd.h"
#include "usnic_log.h"
#include "usnic_uiom.h"
#include "usnic_transport.h"
#define USNIC_DEFAULT_TRANSPORT USNIC_TRANSPORT_ROCE_CUSTOM
static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver)
{
*fw_ver = (u64) *fw_ver_str;
}
static int usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp *qp_grp,
struct ib_udata *udata)
{
struct usnic_ib_dev *us_ibdev;
struct usnic_ib_create_qp_resp resp;
struct pci_dev *pdev;
struct vnic_dev_bar *bar;
struct usnic_vnic_res_chunk *chunk;
int i, err;
memset(&resp, 0, sizeof(resp));
us_ibdev = qp_grp->vf->pf;
pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic);
if (!pdev) {
usnic_err("Failed to get pdev of qp_grp %d\n",
qp_grp->grp_id);
return -EFAULT;
}
bar = usnic_vnic_get_bar(qp_grp->vf->vnic, 0);
if (!bar) {
usnic_err("Failed to get bar0 of qp_grp %d vf %s",
qp_grp->grp_id, pci_name(pdev));
return -EFAULT;
}
resp.vfid = usnic_vnic_get_index(qp_grp->vf->vnic);
resp.bar_bus_addr = bar->bus_addr;
resp.bar_len = bar->len;
resp.transport = qp_grp->transport;
chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ);
if (IS_ERR_OR_NULL(chunk)) {
usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ),
qp_grp->grp_id,
PTR_ERR(chunk));
return chunk ? PTR_ERR(chunk) : -ENOMEM;
}
WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_RQ);
resp.rq_cnt = chunk->cnt;
for (i = 0; i < chunk->cnt; i++)
resp.rq_idx[i] = chunk->res[i]->vnic_idx;
chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_WQ);
if (IS_ERR_OR_NULL(chunk)) {
usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_WQ),
qp_grp->grp_id,
PTR_ERR(chunk));
return chunk ? PTR_ERR(chunk) : -ENOMEM;
}
WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_WQ);
resp.wq_cnt = chunk->cnt;
for (i = 0; i < chunk->cnt; i++)
resp.wq_idx[i] = chunk->res[i]->vnic_idx;
chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_CQ);
if (IS_ERR_OR_NULL(chunk)) {
usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_CQ),
qp_grp->grp_id,
PTR_ERR(chunk));
return chunk ? PTR_ERR(chunk) : -ENOMEM;
}
WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_CQ);
resp.cq_cnt = chunk->cnt;
for (i = 0; i < chunk->cnt; i++)
resp.cq_idx[i] = chunk->res[i]->vnic_idx;
err = ib_copy_to_udata(udata, &resp, sizeof(resp));
if (err) {
usnic_err("Failed to copy udata for %s", us_ibdev->ib_dev.name);
return err;
}
return 0;
}
static struct usnic_ib_qp_grp*
find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev,
struct usnic_ib_pd *pd,
enum usnic_transport_type transport,
struct usnic_vnic_res_spec *res_spec)
{
struct usnic_ib_vf *vf;
struct usnic_vnic *vnic;
struct usnic_ib_qp_grp *qp_grp;
struct device *dev, **dev_list;
int i, found = 0;
BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
if (list_empty(&us_ibdev->vf_dev_list)) {
usnic_info("No vfs to allocate\n");
return NULL;
}
if (!us_ibdev->link_up) {
usnic_info("Cannot allocate qp b/c PF link is down\n");
return NULL;
}
if (usnic_ib_share_vf) {
/* Try to find resouces on a used vf which is in pd */
dev_list = usnic_uiom_get_dev_list(pd->umem_pd);
for (i = 0; dev_list[i]; i++) {
dev = dev_list[i];
vf = pci_get_drvdata(to_pci_dev(dev));
spin_lock(&vf->lock);
vnic = vf->vnic;
if (!usnic_vnic_check_room(vnic, res_spec)) {
usnic_dbg("Found used vnic %s from %s\n",
us_ibdev->ib_dev.name,
pci_name(usnic_vnic_get_pdev(
vnic)));
found = 1;
break;
}
spin_unlock(&vf->lock);
}
usnic_uiom_free_dev_list(dev_list);
}
if (!found) {
/* Try to find resources on an unused vf */
list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) {
spin_lock(&vf->lock);
vnic = vf->vnic;
if (vf->qp_grp_ref_cnt == 0 &&
usnic_vnic_check_room(vnic, res_spec) == 0) {
found = 1;
break;
}
spin_unlock(&vf->lock);
}
}
if (!found) {
usnic_info("No free qp grp found on %s\n",
us_ibdev->ib_dev.name);
return ERR_PTR(-ENOMEM);
}
qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf, pd, res_spec,
transport);
spin_unlock(&vf->lock);
if (IS_ERR_OR_NULL(qp_grp)) {
usnic_err("Failed to allocate qp_grp\n");
return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM);
}
return qp_grp;
}
static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp)
{
struct usnic_ib_vf *vf = qp_grp->vf;
WARN_ON(qp_grp->state != IB_QPS_RESET);
spin_lock(&vf->lock);
usnic_ib_qp_grp_destroy(qp_grp);
spin_unlock(&vf->lock);
}
static void eth_speed_to_ib_speed(int speed, u8 *active_speed,
u8 *active_width)
{
if (speed <= 10000) {
*active_width = IB_WIDTH_1X;
*active_speed = IB_SPEED_FDR10;
} else if (speed <= 20000) {
*active_width = IB_WIDTH_4X;
*active_speed = IB_SPEED_DDR;
} else if (speed <= 30000) {
*active_width = IB_WIDTH_4X;
*active_speed = IB_SPEED_QDR;
} else if (speed <= 40000) {
*active_width = IB_WIDTH_4X;
*active_speed = IB_SPEED_FDR10;
} else {
*active_width = IB_WIDTH_4X;
*active_speed = IB_SPEED_EDR;
}
}
/* Start of ib callback functions */
enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
u8 port_num)
{
return IB_LINK_LAYER_ETHERNET;
}
int usnic_ib_query_device(struct ib_device *ibdev,
struct ib_device_attr *props)
{
struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
union ib_gid gid;
struct ethtool_drvinfo info;
struct ethtool_cmd cmd;
int qp_per_vf;
usnic_dbg("\n");
mutex_lock(&us_ibdev->usdev_lock);
us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
us_ibdev->netdev->ethtool_ops->get_settings(us_ibdev->netdev, &cmd);
memset(props, 0, sizeof(*props));
usnic_mac_to_gid(us_ibdev->mac, &gid.raw[0]);
memcpy(&props->sys_image_guid, &gid.global.interface_id,
sizeof(gid.global.interface_id));
usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver);
props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE;
props->page_size_cap = USNIC_UIOM_PAGE_SIZE;
props->vendor_id = PCI_VENDOR_ID_CISCO;
props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC;
props->hw_ver = us_ibdev->pdev->subsystem_device;
qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
props->max_qp = qp_per_vf *
atomic_read(&us_ibdev->vf_cnt.refcount);
props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] *
atomic_read(&us_ibdev->vf_cnt.refcount);
props->max_pd = USNIC_UIOM_MAX_PD_CNT;
props->max_mr = USNIC_UIOM_MAX_MR_CNT;
props->local_ca_ack_delay = 0;
props->max_pkeys = 0;
props->atomic_cap = IB_ATOMIC_NONE;
props->masked_atomic_cap = props->atomic_cap;
props->max_qp_rd_atom = 0;
props->max_qp_init_rd_atom = 0;
props->max_res_rd_atom = 0;
props->max_srq = 0;
props->max_srq_wr = 0;
props->max_srq_sge = 0;
props->max_fast_reg_page_list_len = 0;
props->max_mcast_grp = 0;
props->max_mcast_qp_attach = 0;
props->max_total_mcast_qp_attach = 0;
props->max_map_per_fmr = 0;
/* Owned by Userspace
* max_qp_wr, max_sge, max_sge_rd, max_cqe */
mutex_unlock(&us_ibdev->usdev_lock);
return 0;
}
int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
struct ib_port_attr *props)
{
struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
struct ethtool_cmd cmd;
usnic_dbg("\n");
mutex_lock(&us_ibdev->usdev_lock);
us_ibdev->netdev->ethtool_ops->get_settings(us_ibdev->netdev, &cmd);
memset(props, 0, sizeof(*props));
props->lid = 0;
props->lmc = 1;
props->sm_lid = 0;
props->sm_sl = 0;
if (us_ibdev->link_up) {
props->state = IB_PORT_ACTIVE;
props->phys_state = 5;
} else {
props->state = IB_PORT_DOWN;
props->phys_state = 3;
}
props->port_cap_flags = 0;
props->gid_tbl_len = 1;
props->pkey_tbl_len = 1;
props->bad_pkey_cntr = 0;
props->qkey_viol_cntr = 0;
eth_speed_to_ib_speed(cmd.speed, &props->active_speed,
&props->active_width);
props->max_mtu = IB_MTU_4096;
props->active_mtu = iboe_get_mtu(us_ibdev->mtu);
/* Userspace will adjust for hdrs */
props->max_msg_sz = us_ibdev->mtu;
props->max_vl_num = 1;
mutex_unlock(&us_ibdev->usdev_lock);
return 0;
}
int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
int qp_attr_mask,
struct ib_qp_init_attr *qp_init_attr)
{
struct usnic_ib_qp_grp *qp_grp;
struct usnic_ib_vf *vf;
int err;
usnic_dbg("\n");
memset(qp_attr, 0, sizeof(*qp_attr));
memset(qp_init_attr, 0, sizeof(*qp_init_attr));
qp_grp = to_uqp_grp(qp);
vf = qp_grp->vf;
mutex_lock(&vf->pf->usdev_lock);
usnic_dbg("\n");
qp_attr->qp_state = qp_grp->state;
qp_attr->cur_qp_state = qp_grp->state;
switch (qp_grp->ibqp.qp_type) {
case IB_QPT_UD:
qp_attr->qkey = 0;
break;
default:
usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type);
err = -EINVAL;
goto err_out;
}
mutex_unlock(&vf->pf->usdev_lock);
return 0;
err_out:
mutex_unlock(&vf->pf->usdev_lock);
return err;
}
int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
union ib_gid *gid)
{
struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
usnic_dbg("\n");
if (index > 1)
return -EINVAL;
mutex_lock(&us_ibdev->usdev_lock);
memset(&(gid->raw[0]), 0, sizeof(gid->raw));
usnic_mac_to_gid(us_ibdev->mac, &gid->raw[0]);
mutex_unlock(&us_ibdev->usdev_lock);
return 0;
}
int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
u16 *pkey)
{
if (index > 1)
return -EINVAL;
*pkey = 0xffff;
return 0;
}
struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev,
struct ib_ucontext *context,
struct ib_udata *udata)
{
struct usnic_ib_pd *pd;
void *umem_pd;
usnic_dbg("\n");
pd = kzalloc(sizeof(*pd), GFP_KERNEL);
if (!pd)
return ERR_PTR(-ENOMEM);
umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
if (IS_ERR_OR_NULL(umem_pd)) {
kfree(pd);
return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM);
}
usnic_info("domain 0x%p allocated for context 0x%p and device %s\n",
pd, context, ibdev->name);
return &pd->ibpd;
}
int usnic_ib_dealloc_pd(struct ib_pd *pd)
{
usnic_info("freeing domain 0x%p\n", pd);
usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
kfree(pd);
return 0;
}
struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *init_attr,
struct ib_udata *udata)
{
int err;
struct usnic_ib_dev *us_ibdev;
struct usnic_ib_qp_grp *qp_grp;
struct usnic_ib_ucontext *ucontext;
int cq_cnt;
struct usnic_vnic_res_spec res_spec;
usnic_dbg("\n");
ucontext = to_uucontext(pd->uobject->context);
us_ibdev = to_usdev(pd->device);
if (init_attr->qp_type != IB_QPT_UD) {
usnic_err("%s asked to make a non-UD QP: %d\n",
us_ibdev->ib_dev.name, init_attr->qp_type);
return ERR_PTR(-EINVAL);
}
mutex_lock(&us_ibdev->usdev_lock);
cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2,
res_spec = min_transport_spec[USNIC_DEFAULT_TRANSPORT];
usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
USNIC_DEFAULT_TRANSPORT,
&res_spec);
if (IS_ERR_OR_NULL(qp_grp)) {
err = (qp_grp ? PTR_ERR(qp_grp) : -ENOMEM);
goto out_release_mutex;
}
err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
if (err) {
err = -EBUSY;
goto out_release_qp_grp;
}
qp_grp->ctx = ucontext;
list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
usnic_ib_log_vf(qp_grp->vf);
mutex_unlock(&us_ibdev->usdev_lock);
return &qp_grp->ibqp;
out_release_qp_grp:
qp_grp_destroy(qp_grp);
out_release_mutex:
mutex_unlock(&us_ibdev->usdev_lock);
return ERR_PTR(err);
}
int usnic_ib_destroy_qp(struct ib_qp *qp)
{
struct usnic_ib_qp_grp *qp_grp;
struct usnic_ib_vf *vf;
usnic_dbg("\n");
qp_grp = to_uqp_grp(qp);
vf = qp_grp->vf;
mutex_lock(&vf->pf->usdev_lock);
if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
usnic_err("Failed to move qp grp %u to reset\n",
qp_grp->grp_id);
}
list_del(&qp_grp->link);
qp_grp_destroy(qp_grp);
mutex_unlock(&vf->pf->usdev_lock);
return 0;
}
int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata)
{
struct usnic_ib_qp_grp *qp_grp;
int status;
usnic_dbg("\n");
qp_grp = to_uqp_grp(ibqp);
/* TODO: Future Support All States */
mutex_lock(&qp_grp->vf->pf->usdev_lock);
if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_INIT) {
status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_INIT,
&qp_grp->filters[DFLT_FILTER_IDX]);
} else if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_RTR) {
status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RTR, NULL);
} else if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_RTS) {
status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RTS, NULL);
} else {
usnic_err("Unexpected combination mask: %u state: %u\n",
attr_mask & IB_QP_STATE, attr->qp_state);
status = -EINVAL;
}
mutex_unlock(&qp_grp->vf->pf->usdev_lock);
return status;
}
struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev, int entries,
int vector, struct ib_ucontext *context,
struct ib_udata *udata)
{
struct ib_cq *cq;
usnic_dbg("\n");
cq = kzalloc(sizeof(*cq), GFP_KERNEL);
if (!cq)
return ERR_PTR(-EBUSY);
return cq;
}
int usnic_ib_destroy_cq(struct ib_cq *cq)
{
usnic_dbg("\n");
kfree(cq);
return 0;
}
struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
u64 virt_addr, int access_flags,
struct ib_udata *udata)
{
struct usnic_ib_mr *mr;
int err;
usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
virt_addr, length);
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (IS_ERR_OR_NULL(mr))
return ERR_PTR(mr ? PTR_ERR(mr) : -ENOMEM);
mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
access_flags, 0);
if (IS_ERR_OR_NULL(mr->umem)) {
err = (mr->umem) ? PTR_ERR(mr->umem) : -EFAULT;
goto err_free;
}
mr->ibmr.lkey = mr->ibmr.rkey = 0;
return &mr->ibmr;
err_free:
kfree(mr);
return ERR_PTR(err);
}
int usnic_ib_dereg_mr(struct ib_mr *ibmr)
{
struct usnic_ib_mr *mr = to_umr(ibmr);
usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
usnic_uiom_reg_release(mr->umem, ibmr->pd->uobject->context->closing);
kfree(mr);
return 0;
}
struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev,
struct ib_udata *udata)
{
struct usnic_ib_ucontext *context;
struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
usnic_dbg("\n");
context = kmalloc(sizeof(*context), GFP_KERNEL);
if (!context)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&context->qp_grp_list);
mutex_lock(&us_ibdev->usdev_lock);
list_add_tail(&context->link, &us_ibdev->ctx_list);
mutex_unlock(&us_ibdev->usdev_lock);
return &context->ibucontext;
}
int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
{
struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
usnic_dbg("\n");
mutex_lock(&us_ibdev->usdev_lock);
BUG_ON(!list_empty(&context->qp_grp_list));
list_del(&context->link);
mutex_unlock(&us_ibdev->usdev_lock);
kfree(context);
return 0;
}
int usnic_ib_mmap(struct ib_ucontext *context,
struct vm_area_struct *vma)
{
struct usnic_ib_ucontext *uctx = to_ucontext(context);
struct usnic_ib_dev *us_ibdev;
struct usnic_ib_qp_grp *qp_grp;
struct usnic_ib_vf *vf;
struct vnic_dev_bar *bar;
dma_addr_t bus_addr;
unsigned int len;
unsigned int vfid;
usnic_dbg("\n");
us_ibdev = to_usdev(context->device);
vma->vm_flags |= VM_IO;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
vfid = vma->vm_pgoff;
usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
vma->vm_pgoff, PAGE_SHIFT, vfid);
mutex_lock(&us_ibdev->usdev_lock);
list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
vf = qp_grp->vf;
if (usnic_vnic_get_index(vf->vnic) == vfid) {
bar = usnic_vnic_get_bar(vf->vnic, 0);
if ((vma->vm_end - vma->vm_start) != bar->len) {
usnic_err("Bar0 Len %lu - Request map %lu\n",
bar->len,
vma->vm_end - vma->vm_start);
mutex_unlock(&us_ibdev->usdev_lock);
return -EINVAL;
}
bus_addr = bar->bus_addr;
len = bar->len;
usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
&bus_addr, bar->vaddr, bar->len);
mutex_unlock(&us_ibdev->usdev_lock);
return remap_pfn_range(vma,
vma->vm_start,
bus_addr >> PAGE_SHIFT,
len, vma->vm_page_prot);
}
}
mutex_unlock(&us_ibdev->usdev_lock);
usnic_err("No VF %u found\n", vfid);
return -EINVAL;
}
/* In ib callbacks section - Start of stub funcs */
struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd,
struct ib_ah_attr *ah_attr)
{
usnic_dbg("\n");
return ERR_PTR(-EPERM);
}
int usnic_ib_destroy_ah(struct ib_ah *ah)
{
usnic_dbg("\n");
return -EINVAL;
}
int usnic_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
struct ib_send_wr **bad_wr)
{
usnic_dbg("\n");
return -EINVAL;
}
int usnic_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
struct ib_recv_wr **bad_wr)
{
usnic_dbg("\n");
return -EINVAL;
}
int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries,
struct ib_wc *wc)
{
usnic_dbg("\n");
return -EINVAL;
}
int usnic_ib_req_notify_cq(struct ib_cq *cq,
enum ib_cq_notify_flags flags)
{
usnic_dbg("\n");
return -EINVAL;
}
struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc)
{
usnic_dbg("\n");
return ERR_PTR(-ENOMEM);
}
/* In ib callbacks section - End of stub funcs */
/* End of ib callbacks section */

72
drivers/infiniband/hw/usnic/usnic_ib_verbs.h 100644
View File

@ -0,0 +1,72 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_IB_VERBS_H_
#define USNIC_IB_VERBS_H_
#include "usnic_ib.h"
enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
u8 port_num);
int usnic_ib_query_device(struct ib_device *ibdev,
struct ib_device_attr *props);
int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
struct ib_port_attr *props);
int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
int qp_attr_mask,
struct ib_qp_init_attr *qp_init_attr);
int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
union ib_gid *gid);
int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
u16 *pkey);
struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev,
struct ib_ucontext *context,
struct ib_udata *udata);
int usnic_ib_dealloc_pd(struct ib_pd *pd);
struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *init_attr,
struct ib_udata *udata);
int usnic_ib_destroy_qp(struct ib_qp *qp);
int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata);
struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev, int entries,
int vector, struct ib_ucontext *context,
struct ib_udata *udata);
int usnic_ib_destroy_cq(struct ib_cq *cq);
struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
u64 virt_addr, int access_flags,
struct ib_udata *udata);
int usnic_ib_dereg_mr(struct ib_mr *ibmr);
struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev,
struct ib_udata *udata);
int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext);
int usnic_ib_mmap(struct ib_ucontext *context,
struct vm_area_struct *vma);
struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd,
struct ib_ah_attr *ah_attr);
int usnic_ib_destroy_ah(struct ib_ah *ah);
int usnic_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
struct ib_send_wr **bad_wr);
int usnic_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
struct ib_recv_wr **bad_wr);
int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries,
struct ib_wc *wc);
int usnic_ib_req_notify_cq(struct ib_cq *cq,
enum ib_cq_notify_flags flags);
struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc);
#endif /* !USNIC_IB_VERBS_H */

58
drivers/infiniband/hw/usnic/usnic_log.h 100644
View File

@ -0,0 +1,58 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_LOG_H_
#define USNIC_LOG_H_
#include "usnic.h"
extern unsigned int usnic_log_lvl;
#define USNIC_LOG_LVL_NONE (0)
#define USNIC_LOG_LVL_ERR (1)
#define USNIC_LOG_LVL_INFO (2)
#define USNIC_LOG_LVL_DBG (3)
#define usnic_printk(lvl, args...) \
do { \
printk(lvl "%s:%s:%d: ", DRV_NAME, __func__, \
__LINE__); \
printk(args); \
} while (0)
#define usnic_dbg(args...) \
do { \
if (unlikely(usnic_log_lvl >= USNIC_LOG_LVL_DBG)) { \
usnic_printk(KERN_INFO, args); \
} \
} while (0)
#define usnic_info(args...) \
do { \
if (usnic_log_lvl >= USNIC_LOG_LVL_INFO) { \
usnic_printk(KERN_INFO, args); \
} \
} while (0)
#define usnic_err(args...) \
do { \
if (usnic_log_lvl >= USNIC_LOG_LVL_ERR) { \
usnic_printk(KERN_ERR, args); \
} \
} while (0)
#endif /* !USNIC_LOG_H_ */

125
drivers/infiniband/hw/usnic/usnic_transport.c 100644
View File

@ -0,0 +1,125 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/bitmap.h>
#include <linux/module.h>
#include <linux/slab.h>
#include "usnic_transport.h"
#include "usnic_log.h"
/* ROCE */
static unsigned long *roce_bitmap;
static u16 roce_next_port = 1;
#define ROCE_BITMAP_SZ ((1 << (8 /*CHAR_BIT*/ * sizeof(u16)))/8 /*CHAR BIT*/)
static DEFINE_SPINLOCK(roce_bitmap_lock);
static const char *transport_to_str(enum usnic_transport_type type)
{
switch (type) {
case USNIC_TRANSPORT_UNKNOWN:
return "Unknown";
case USNIC_TRANSPORT_ROCE_CUSTOM:
return "roce custom";
case USNIC_TRANSPORT_MAX:
return "Max?";
default:
return "Not known";
}
}
/*
* reserve a port number. if "0" specified, we will try to pick one
* starting at roce_next_port. roce_next_port will take on the values
* 1..4096
*/
u16 usnic_transport_rsrv_port(enum usnic_transport_type type, u16 port_num)
{
if (type == USNIC_TRANSPORT_ROCE_CUSTOM) {
spin_lock(&roce_bitmap_lock);
if (!port_num) {
port_num = bitmap_find_next_zero_area(roce_bitmap,
ROCE_BITMAP_SZ,
roce_next_port /* start */,
1 /* nr */,
0 /* align */);
roce_next_port = (port_num & 4095) + 1;
} else if (test_bit(port_num, roce_bitmap)) {
usnic_err("Failed to allocate port for %s\n",
transport_to_str(type));
spin_unlock(&roce_bitmap_lock);
goto out_fail;
}
bitmap_set(roce_bitmap, port_num, 1);
spin_unlock(&roce_bitmap_lock);
} else {
usnic_err("Failed to allocate port - transport %s unsupported\n",
transport_to_str(type));
goto out_fail;
}
usnic_dbg("Allocating port %hu for %s\n", port_num,
transport_to_str(type));
return port_num;
out_fail:
return 0;
}
void usnic_transport_unrsrv_port(enum usnic_transport_type type, u16 port_num)
{
if (type == USNIC_TRANSPORT_ROCE_CUSTOM) {
spin_lock(&roce_bitmap_lock);
if (!port_num) {
usnic_err("Unreserved unvalid port num 0 for %s\n",
transport_to_str(type));
goto out_roce_custom;
}
if (!test_bit(port_num, roce_bitmap)) {
usnic_err("Unreserving invalid %hu for %s\n",
port_num,
transport_to_str(type));
goto out_roce_custom;
}
bitmap_clear(roce_bitmap, port_num, 1);
usnic_dbg("Freeing port %hu for %s\n", port_num,
transport_to_str(type));
out_roce_custom:
spin_unlock(&roce_bitmap_lock);
} else {
usnic_err("Freeing invalid port %hu for %d\n", port_num, type);
}
}
int usnic_transport_init(void)
{
roce_bitmap = kzalloc(ROCE_BITMAP_SZ, GFP_KERNEL);
if (!roce_bitmap) {
usnic_err("Failed to allocate bit map");
return -ENOMEM;
}
/* Do not ever allocate bit 0, hence set it here */
bitmap_set(roce_bitmap, 0, 1);
return 0;
}
void usnic_transport_fini(void)
{
kfree(roce_bitmap);
}

28
drivers/infiniband/hw/usnic/usnic_transport.h 100644
View File

@ -0,0 +1,28 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_TRANSPORT_H_
#define USNIC_TRANSPORT_H_
#include "usnic_abi.h"
u16 usnic_transport_rsrv_port(enum usnic_transport_type type, u16 port_num);
void usnic_transport_unrsrv_port(enum usnic_transport_type type, u16 port_num);
int usnic_transport_init(void);
void usnic_transport_fini(void);
#endif /* !USNIC_TRANSPORT_H */

603
drivers/infiniband/hw/usnic/usnic_uiom.c 100644
View File

@ -0,0 +1,603 @@
/*
* Copyright (c) 2005 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
* Copyright (c) 2013 Cisco Systems. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/mm.h>
#include <linux/dma-mapping.h>
#include <linux/sched.h>
#include <linux/hugetlb.h>
#include <linux/dma-attrs.h>
#include <linux/iommu.h>
#include <linux/workqueue.h>
#include <linux/list.h>
#include <linux/pci.h>
#include "usnic_log.h"
#include "usnic_uiom.h"
#include "usnic_uiom_interval_tree.h"
static struct workqueue_struct *usnic_uiom_wq;
#define USNIC_UIOM_PAGE_CHUNK \
((PAGE_SIZE - offsetof(struct usnic_uiom_chunk, page_list)) /\
((void *) &((struct usnic_uiom_chunk *) 0)->page_list[1] - \
(void *) &((struct usnic_uiom_chunk *) 0)->page_list[0]))
static void usnic_uiom_reg_account(struct work_struct *work)
{
struct usnic_uiom_reg *umem = container_of(work,
struct usnic_uiom_reg, work);
down_write(&umem->mm->mmap_sem);
umem->mm->locked_vm -= umem->diff;
up_write(&umem->mm->mmap_sem);
mmput(umem->mm);
kfree(umem);
}
static int usnic_uiom_dma_fault(struct iommu_domain *domain,
struct device *dev,
unsigned long iova, int flags,
void *token)
{
usnic_err("Device %s iommu fault domain 0x%pK va 0x%lx flags 0x%x\n",
dev_name(dev),
domain, iova, flags);
return -ENOSYS;
}
static void usnic_uiom_put_pages(struct list_head *chunk_list, int dirty)
{
struct usnic_uiom_chunk *chunk, *tmp;
struct page *page;
int i;
dma_addr_t pa;
list_for_each_entry_safe(chunk, tmp, chunk_list, list) {
for (i = 0; i < chunk->nents; i++) {
page = sg_page(&chunk->page_list[i]);
pa = sg_phys(&chunk->page_list[i]);
if (dirty)
set_page_dirty_lock(page);
put_page(page);
usnic_dbg("pa: %pa\n", &pa);
}
kfree(chunk);
}
}
static int usnic_uiom_get_pages(unsigned long addr, size_t size, int writable,
int dmasync, struct list_head *chunk_list)
{
struct page **page_list;
struct usnic_uiom_chunk *chunk;
unsigned long locked;
unsigned long lock_limit;
unsigned long cur_base;
unsigned long npages;
int ret;
int off;
int i;
int flags;
dma_addr_t pa;
DEFINE_DMA_ATTRS(attrs);
if (dmasync)
dma_set_attr(DMA_ATTR_WRITE_BARRIER, &attrs);
if (!can_do_mlock())
return -EPERM;
INIT_LIST_HEAD(chunk_list);
page_list = (struct page **) __get_free_page(GFP_KERNEL);
if (!page_list)
return -ENOMEM;
npages = PAGE_ALIGN(size + (addr & ~PAGE_MASK)) >> PAGE_SHIFT;
down_write(&current->mm->mmap_sem);
locked = npages + current->mm->locked_vm;
lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
if ((locked > lock_limit) && !capable(CAP_IPC_LOCK)) {
ret = -ENOMEM;
goto out;
}
flags = IOMMU_READ | IOMMU_CACHE;
flags |= (writable) ? IOMMU_WRITE : 0;
cur_base = addr & PAGE_MASK;
ret = 0;
while (npages) {
ret = get_user_pages(current, current->mm, cur_base,
min_t(unsigned long, npages,
PAGE_SIZE / sizeof(struct page *)),
1, !writable, page_list, NULL);
if (ret < 0)
goto out;
npages -= ret;
off = 0;
while (ret) {
chunk = kmalloc(sizeof(*chunk) +
sizeof(struct scatterlist) *
min_t(int, ret, USNIC_UIOM_PAGE_CHUNK),
GFP_KERNEL);
if (!chunk) {
ret = -ENOMEM;
goto out;
}
chunk->nents = min_t(int, ret, USNIC_UIOM_PAGE_CHUNK);
sg_init_table(chunk->page_list, chunk->nents);
for (i = 0; i < chunk->nents; ++i) {
sg_set_page(&chunk->page_list[i],
page_list[i + off],
PAGE_SIZE, 0);
pa = sg_phys(&chunk->page_list[i]);
usnic_dbg("va: 0x%lx pa: %pa\n",
cur_base + i*PAGE_SIZE, &pa);
}
cur_base += chunk->nents * PAGE_SIZE;
ret -= chunk->nents;
off += chunk->nents;
list_add_tail(&chunk->list, chunk_list);
}
ret = 0;
}
out:
if (ret < 0)
usnic_uiom_put_pages(chunk_list, 0);
else
current->mm->locked_vm = locked;
up_write(&current->mm->mmap_sem);
free_page((unsigned long) page_list);
return ret;
}
static void usnic_uiom_unmap_sorted_intervals(struct list_head *intervals,
struct usnic_uiom_pd *pd)
{
struct usnic_uiom_interval_node *interval, *tmp;
long unsigned va, size;
list_for_each_entry_safe(interval, tmp, intervals, link) {
va = interval->start << PAGE_SHIFT;
size = ((interval->last - interval->start) + 1) << PAGE_SHIFT;
while (size > 0) {
/* Workaround for RH 970401 */
usnic_dbg("va 0x%lx size 0x%lx", va, PAGE_SIZE);
iommu_unmap(pd->domain, va, PAGE_SIZE);
va += PAGE_SIZE;
size -= PAGE_SIZE;
}
}
}
static void __usnic_uiom_reg_release(struct usnic_uiom_pd *pd,
struct usnic_uiom_reg *uiomr,
int dirty)
{
int npages;
unsigned long vpn_start, vpn_last;
struct usnic_uiom_interval_node *interval, *tmp;
int writable = 0;
LIST_HEAD(rm_intervals);
npages = PAGE_ALIGN(uiomr->length + uiomr->offset) >> PAGE_SHIFT;
vpn_start = (uiomr->va & PAGE_MASK) >> PAGE_SHIFT;
vpn_last = vpn_start + npages - 1;
spin_lock(&pd->lock);
usnic_uiom_remove_interval(&pd->rb_root, vpn_start,
vpn_last, &rm_intervals);
usnic_uiom_unmap_sorted_intervals(&rm_intervals, pd);
list_for_each_entry_safe(interval, tmp, &rm_intervals, link) {
if (interval->flags & IOMMU_WRITE)
writable = 1;
list_del(&interval->link);
kfree(interval);
}
usnic_uiom_put_pages(&uiomr->chunk_list, dirty & writable);
spin_unlock(&pd->lock);
}
static int usnic_uiom_map_sorted_intervals(struct list_head *intervals,
struct usnic_uiom_reg *uiomr)
{
int i, err;
size_t size;
struct usnic_uiom_chunk *chunk;
struct usnic_uiom_interval_node *interval_node;
dma_addr_t pa;
dma_addr_t pa_start = 0;
dma_addr_t pa_end = 0;
long int va_start = -EINVAL;
struct usnic_uiom_pd *pd = uiomr->pd;
long int va = uiomr->va & PAGE_MASK;
int flags = IOMMU_READ | IOMMU_CACHE;
flags |= (uiomr->writable) ? IOMMU_WRITE : 0;
chunk = list_first_entry(&uiomr->chunk_list, struct usnic_uiom_chunk,
list);
list_for_each_entry(interval_node, intervals, link) {
iter_chunk:
for (i = 0; i < chunk->nents; i++, va += PAGE_SIZE) {
pa = sg_phys(&chunk->page_list[i]);
if ((va >> PAGE_SHIFT) < interval_node->start)
continue;
if ((va >> PAGE_SHIFT) == interval_node->start) {
/* First page of the interval */
va_start = va;
pa_start = pa;
pa_end = pa;
}
WARN_ON(va_start == -EINVAL);
if ((pa_end + PAGE_SIZE != pa) &&
(pa != pa_start)) {
/* PAs are not contiguous */
size = pa_end - pa_start + PAGE_SIZE;
usnic_dbg("va 0x%lx pa %pa size 0x%zx flags 0x%x",
va_start, &pa_start, size, flags);
err = iommu_map(pd->domain, va_start, pa_start,
size, flags);
if (err) {
usnic_err("Failed to map va 0x%lx pa 0x%pa size 0x%zx with err %d\n",
va_start, &pa_start, size, err);
goto err_out;
}
va_start = va;
pa_start = pa;
pa_end = pa;
}
if ((va >> PAGE_SHIFT) == interval_node->last) {
/* Last page of the interval */
size = pa - pa_start + PAGE_SIZE;
usnic_dbg("va 0x%lx pa %pa size 0x%zx flags 0x%x\n",
va_start, &pa_start, size, flags);
err = iommu_map(pd->domain, va_start, pa_start,
size, flags);
if (err) {
usnic_err("Failed to map va 0x%lx pa %pa size 0x%zx with err %d\n",
va_start, &pa_start, size, err);
goto err_out;
}
break;
}
if (pa != pa_start)
pa_end += PAGE_SIZE;
}
if (i == chunk->nents) {
/*
* Hit last entry of the chunk,
* hence advance to next chunk
*/
chunk = list_first_entry(&chunk->list,
struct usnic_uiom_chunk,
list);
goto iter_chunk;
}
}
return 0;
err_out:
usnic_uiom_unmap_sorted_intervals(intervals, pd);
return err;
}
struct usnic_uiom_reg *usnic_uiom_reg_get(struct usnic_uiom_pd *pd,
unsigned long addr, size_t size,
int writable, int dmasync)
{
struct usnic_uiom_reg *uiomr;
unsigned long va_base, vpn_start, vpn_last;
unsigned long npages;
int offset, err;
LIST_HEAD(sorted_diff_intervals);
/*
* Intel IOMMU map throws an error if a translation entry is
* changed from read to write. This module may not unmap
* and then remap the entry after fixing the permission
* b/c this open up a small windows where hw DMA may page fault
* Hence, make all entries to be writable.
*/
writable = 1;
va_base = addr & PAGE_MASK;
offset = addr & ~PAGE_MASK;
npages = PAGE_ALIGN(size + offset) >> PAGE_SHIFT;
vpn_start = (addr & PAGE_MASK) >> PAGE_SHIFT;
vpn_last = vpn_start + npages - 1;
uiomr = kmalloc(sizeof(*uiomr), GFP_KERNEL);
if (!uiomr)
return ERR_PTR(-ENOMEM);
uiomr->va = va_base;
uiomr->offset = offset;
uiomr->length = size;
uiomr->writable = writable;
uiomr->pd = pd;
err = usnic_uiom_get_pages(addr, size, writable, dmasync,
&uiomr->chunk_list);
if (err) {
usnic_err("Failed get_pages vpn [0x%lx,0x%lx] err %d\n",
vpn_start, vpn_last, err);
goto out_free_uiomr;
}
spin_lock(&pd->lock);
err = usnic_uiom_get_intervals_diff(vpn_start, vpn_last,
(writable) ? IOMMU_WRITE : 0,
IOMMU_WRITE,
&pd->rb_root,
&sorted_diff_intervals);
if (err) {
usnic_err("Failed disjoint interval vpn [0x%lx,0x%lx] err %d\n",
vpn_start, vpn_last, err);
goto out_put_pages;
}
err = usnic_uiom_map_sorted_intervals(&sorted_diff_intervals, uiomr);
if (err) {
usnic_err("Failed map interval vpn [0x%lx,0x%lx] err %d\n",
vpn_start, vpn_last, err);
goto out_put_intervals;
}
err = usnic_uiom_insert_interval(&pd->rb_root, vpn_start, vpn_last,
(writable) ? IOMMU_WRITE : 0);
if (err) {
usnic_err("Failed insert interval vpn [0x%lx,0x%lx] err %d\n",
vpn_start, vpn_last, err);
goto out_unmap_intervals;
}
usnic_uiom_put_interval_set(&sorted_diff_intervals);
spin_unlock(&pd->lock);
return uiomr;
out_unmap_intervals:
usnic_uiom_unmap_sorted_intervals(&sorted_diff_intervals, pd);
out_put_intervals:
usnic_uiom_put_interval_set(&sorted_diff_intervals);
out_put_pages:
usnic_uiom_put_pages(&uiomr->chunk_list, 0);
spin_unlock(&pd->lock);
out_free_uiomr:
kfree(uiomr);
return ERR_PTR(err);
}
void usnic_uiom_reg_release(struct usnic_uiom_reg *uiomr, int closing)
{
struct mm_struct *mm;
unsigned long diff;
__usnic_uiom_reg_release(uiomr->pd, uiomr, 1);
mm = get_task_mm(current);
if (!mm) {
kfree(uiomr);
return;
}
diff = PAGE_ALIGN(uiomr->length + uiomr->offset) >> PAGE_SHIFT;
/*
* We may be called with the mm's mmap_sem already held. This
* can happen when a userspace munmap() is the call that drops
* the last reference to our file and calls our release
* method. If there are memory regions to destroy, we'll end
* up here and not be able to take the mmap_sem. In that case
* we defer the vm_locked accounting to the system workqueue.
*/
if (closing) {
if (!down_write_trylock(&mm->mmap_sem)) {
INIT_WORK(&uiomr->work, usnic_uiom_reg_account);
uiomr->mm = mm;
uiomr->diff = diff;
queue_work(usnic_uiom_wq, &uiomr->work);
return;
}
} else
down_write(&mm->mmap_sem);
current->mm->locked_vm -= diff;
up_write(&mm->mmap_sem);
mmput(mm);
kfree(uiomr);
}
struct usnic_uiom_pd *usnic_uiom_alloc_pd(void)
{
struct usnic_uiom_pd *pd;
void *domain;
pd = kzalloc(sizeof(*pd), GFP_KERNEL);
if (!pd)
return ERR_PTR(-ENOMEM);
pd->domain = domain = iommu_domain_alloc(&pci_bus_type);
if (IS_ERR_OR_NULL(domain)) {
usnic_err("Failed to allocate IOMMU domain with err %ld\n",
PTR_ERR(pd->domain));
kfree(pd);
return ERR_PTR(domain ? PTR_ERR(domain) : -ENOMEM);
}
iommu_set_fault_handler(pd->domain, usnic_uiom_dma_fault, NULL);
spin_lock_init(&pd->lock);
INIT_LIST_HEAD(&pd->devs);
return pd;
}
void usnic_uiom_dealloc_pd(struct usnic_uiom_pd *pd)
{
iommu_domain_free(pd->domain);
kfree(pd);
}
int usnic_uiom_attach_dev_to_pd(struct usnic_uiom_pd *pd, struct device *dev)
{
struct usnic_uiom_dev *uiom_dev;
int err;
uiom_dev = kzalloc(sizeof(*uiom_dev), GFP_KERNEL);
if (!uiom_dev)
return -ENOMEM;
uiom_dev->dev = dev;
err = iommu_attach_device(pd->domain, dev);
if (err)
goto out_free_dev;
if (!iommu_domain_has_cap(pd->domain, IOMMU_CAP_CACHE_COHERENCY)) {
usnic_err("IOMMU of %s does not support cache coherency\n",
dev_name(dev));
err = -EINVAL;
goto out_detach_device;
}
spin_lock(&pd->lock);
list_add_tail(&uiom_dev->link, &pd->devs);
pd->dev_cnt++;
spin_unlock(&pd->lock);
return 0;
out_detach_device:
iommu_detach_device(pd->domain, dev);
out_free_dev:
kfree(uiom_dev);
return err;
}
void usnic_uiom_detach_dev_from_pd(struct usnic_uiom_pd *pd, struct device *dev)
{
struct usnic_uiom_dev *uiom_dev;
int found = 0;
spin_lock(&pd->lock);
list_for_each_entry(uiom_dev, &pd->devs, link) {
if (uiom_dev->dev == dev) {
found = 1;
break;
}
}
if (!found) {
usnic_err("Unable to free dev %s - not found\n",
dev_name(dev));
spin_unlock(&pd->lock);
return;
}
list_del(&uiom_dev->link);
pd->dev_cnt--;
spin_unlock(&pd->lock);
return iommu_detach_device(pd->domain, dev);
}
struct device **usnic_uiom_get_dev_list(struct usnic_uiom_pd *pd)
{
struct usnic_uiom_dev *uiom_dev;
struct device **devs;
int i = 0;
spin_lock(&pd->lock);
devs = kcalloc(pd->dev_cnt + 1, sizeof(*devs), GFP_ATOMIC);
if (!devs) {
devs = ERR_PTR(-ENOMEM);
goto out;
}
list_for_each_entry(uiom_dev, &pd->devs, link) {
devs[i++] = uiom_dev->dev;
}
out:
spin_unlock(&pd->lock);
return devs;
}
void usnic_uiom_free_dev_list(struct device **devs)
{
kfree(devs);
}
int usnic_uiom_init(char *drv_name)
{
if (!iommu_present(&pci_bus_type)) {
usnic_err("IOMMU required but not present or enabled. USNIC QPs will not function w/o enabling IOMMU\n");
return -EPERM;
}
usnic_uiom_wq = create_workqueue(drv_name);
if (!usnic_uiom_wq) {
usnic_err("Unable to alloc wq for drv %s\n", drv_name);
return -ENOMEM;
}
return 0;
}
void usnic_uiom_fini(void)
{
flush_workqueue(usnic_uiom_wq);
destroy_workqueue(usnic_uiom_wq);
}

80
drivers/infiniband/hw/usnic/usnic_uiom.h 100644
View File

@ -0,0 +1,80 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_UIOM_H_
#define USNIC_UIOM_H_
#include <linux/list.h>
#include <linux/scatterlist.h>
#include "usnic_uiom_interval_tree.h"
#define USNIC_UIOM_READ (1)
#define USNIC_UIOM_WRITE (2)
#define USNIC_UIOM_MAX_PD_CNT (1000)
#define USNIC_UIOM_MAX_MR_CNT (1000000)
#define USNIC_UIOM_MAX_MR_SIZE (~0UL)
#define USNIC_UIOM_PAGE_SIZE (PAGE_SIZE)
struct usnic_uiom_dev {
struct device *dev;
struct list_head link;
};
struct usnic_uiom_pd {
struct iommu_domain *domain;
spinlock_t lock;
struct rb_root rb_root;
struct list_head devs;
int dev_cnt;
};
struct usnic_uiom_reg {
struct usnic_uiom_pd *pd;
unsigned long va;
size_t length;
int offset;
int page_size;
int writable;
struct list_head chunk_list;
struct work_struct work;
struct mm_struct *mm;
unsigned long diff;
};
struct usnic_uiom_chunk {
struct list_head list;
int nents;
struct scatterlist page_list[0];
};
struct usnic_uiom_pd *usnic_uiom_alloc_pd(void);
void usnic_uiom_dealloc_pd(struct usnic_uiom_pd *pd);
int usnic_uiom_attach_dev_to_pd(struct usnic_uiom_pd *pd, struct device *dev);
void usnic_uiom_detach_dev_from_pd(struct usnic_uiom_pd *pd,
struct device *dev);
struct device **usnic_uiom_get_dev_list(struct usnic_uiom_pd *pd);
void usnic_uiom_free_dev_list(struct device **devs);
struct usnic_uiom_reg *usnic_uiom_reg_get(struct usnic_uiom_pd *pd,
unsigned long addr, size_t size,
int access, int dmasync);
void usnic_uiom_reg_release(struct usnic_uiom_reg *uiomr, int closing);
int usnic_uiom_init(char *drv_name);
void usnic_uiom_fini(void);
#endif /* USNIC_UIOM_H_ */

237
drivers/infiniband/hw/usnic/usnic_uiom_interval_tree.c 100644
View File

@ -0,0 +1,237 @@
#include <linux/init.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/list_sort.h>
#include <linux/version.h>
#include <linux/interval_tree_generic.h>
#include "usnic_uiom_interval_tree.h"
#define START(node) ((node)->start)
#define LAST(node) ((node)->last)
#define MAKE_NODE(node, start, end, ref_cnt, flags, err, err_out) \
do { \
node = usnic_uiom_interval_node_alloc(start, \
end, ref_cnt, flags); \
if (!node) { \
err = -ENOMEM; \
goto err_out; \
} \
} while (0)
#define MARK_FOR_ADD(node, list) (list_add_tail(&node->link, list))
#define MAKE_NODE_AND_APPEND(node, start, end, ref_cnt, flags, err, \
err_out, list) \
do { \
MAKE_NODE(node, start, end, \
ref_cnt, flags, err, \
err_out); \
MARK_FOR_ADD(node, list); \
} while (0)
#define FLAGS_EQUAL(flags1, flags2, mask) \
(((flags1) & (mask)) == ((flags2) & (mask)))
static struct usnic_uiom_interval_node*
usnic_uiom_interval_node_alloc(long int start, long int last, int ref_cnt,
int flags)
{
struct usnic_uiom_interval_node *interval = kzalloc(sizeof(*interval),
GFP_ATOMIC);
if (!interval)
return NULL;
interval->start = start;
interval->last = last;
interval->flags = flags;
interval->ref_cnt = ref_cnt;
return interval;
}
static int interval_cmp(void *priv, struct list_head *a, struct list_head *b)
{
struct usnic_uiom_interval_node *node_a, *node_b;
node_a = list_entry(a, struct usnic_uiom_interval_node, link);
node_b = list_entry(b, struct usnic_uiom_interval_node, link);
/* long to int */
if (node_a->start < node_b->start)
return -1;
else if (node_a->start > node_b->start)
return 1;
return 0;
}
static void
find_intervals_intersection_sorted(struct rb_root *root, unsigned long start,
unsigned long last,
struct list_head *list)
{
struct usnic_uiom_interval_node *node;
INIT_LIST_HEAD(list);
for (node = usnic_uiom_interval_tree_iter_first(root, start, last);
node;
node = usnic_uiom_interval_tree_iter_next(node, start, last))
list_add_tail(&node->link, list);
list_sort(NULL, list, interval_cmp);
}
int usnic_uiom_get_intervals_diff(unsigned long start, unsigned long last,
int flags, int flag_mask,
struct rb_root *root,
struct list_head *diff_set)
{
struct usnic_uiom_interval_node *interval, *tmp;
int err = 0;
long int pivot = start;
LIST_HEAD(intersection_set);
INIT_LIST_HEAD(diff_set);
find_intervals_intersection_sorted(root, start, last,
&intersection_set);
list_for_each_entry(interval, &intersection_set, link) {
if (pivot < interval->start) {
MAKE_NODE_AND_APPEND(tmp, pivot, interval->start - 1,
1, flags, err, err_out,
diff_set);
pivot = interval->start;
}
/*
* Invariant: Set [start, pivot] is either in diff_set or root,
* but not in both.
*/
if (pivot > interval->last) {
continue;
} else if (pivot <= interval->last &&
FLAGS_EQUAL(interval->flags, flags,
flag_mask)) {
pivot = interval->last + 1;
}
}
if (pivot <= last)
MAKE_NODE_AND_APPEND(tmp, pivot, last, 1, flags, err, err_out,
diff_set);
return 0;
err_out:
list_for_each_entry_safe(interval, tmp, diff_set, link) {
list_del(&interval->link);
kfree(interval);
}
return err;
}
void usnic_uiom_put_interval_set(struct list_head *intervals)
{
struct usnic_uiom_interval_node *interval, *tmp;
list_for_each_entry_safe(interval, tmp, intervals, link)
kfree(interval);
}
int usnic_uiom_insert_interval(struct rb_root *root, unsigned long start,
unsigned long last, int flags)
{
struct usnic_uiom_interval_node *interval, *tmp;
unsigned long istart, ilast;
int iref_cnt, iflags;
unsigned long lpivot = start;
int err = 0;
LIST_HEAD(to_add);
LIST_HEAD(intersection_set);
find_intervals_intersection_sorted(root, start, last,
&intersection_set);
list_for_each_entry(interval, &intersection_set, link) {
/*
* Invariant - lpivot is the left edge of next interval to be
* inserted
*/
istart = interval->start;
ilast = interval->last;
iref_cnt = interval->ref_cnt;
iflags = interval->flags;
if (istart < lpivot) {
MAKE_NODE_AND_APPEND(tmp, istart, lpivot - 1, iref_cnt,
iflags, err, err_out, &to_add);
} else if (istart > lpivot) {
MAKE_NODE_AND_APPEND(tmp, lpivot, istart - 1, 1, flags,
err, err_out, &to_add);
lpivot = istart;
} else {
lpivot = istart;
}
if (ilast > last) {
MAKE_NODE_AND_APPEND(tmp, lpivot, last, iref_cnt + 1,
iflags | flags, err, err_out,
&to_add);
MAKE_NODE_AND_APPEND(tmp, last + 1, ilast, iref_cnt,
iflags, err, err_out, &to_add);
} else {
MAKE_NODE_AND_APPEND(tmp, lpivot, ilast, iref_cnt + 1,
iflags | flags, err, err_out,
&to_add);
}
lpivot = ilast + 1;
}
if (lpivot <= last)
MAKE_NODE_AND_APPEND(tmp, lpivot, last, 1, flags, err, err_out,
&to_add);
list_for_each_entry_safe(interval, tmp, &intersection_set, link) {
usnic_uiom_interval_tree_remove(interval, root);
kfree(interval);
}
list_for_each_entry(interval, &to_add, link)
usnic_uiom_interval_tree_insert(interval, root);
return 0;
err_out:
list_for_each_entry_safe(interval, tmp, &to_add, link)
kfree(interval);
return err;
}
void usnic_uiom_remove_interval(struct rb_root *root, unsigned long start,
unsigned long last, struct list_head *removed)
{
struct usnic_uiom_interval_node *interval;
for (interval = usnic_uiom_interval_tree_iter_first(root, start, last);
interval;
interval = usnic_uiom_interval_tree_iter_next(interval,
start,
last)) {
if (--interval->ref_cnt == 0)
list_add_tail(&interval->link, removed);
}
list_for_each_entry(interval, removed, link)
usnic_uiom_interval_tree_remove(interval, root);
}
INTERVAL_TREE_DEFINE(struct usnic_uiom_interval_node, rb,
unsigned long, __subtree_last,
START, LAST, , usnic_uiom_interval_tree)

74
drivers/infiniband/hw/usnic/usnic_uiom_interval_tree.h 100644
View File

@ -0,0 +1,74 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_UIOM_INTERVAL_TREE_H_
#define USNIC_UIOM_INTERVAL_TREE_H_
#include <linux/version.h>
#include <linux/rbtree.h>
struct usnic_uiom_interval_node {
struct rb_node rb;
struct list_head link;
unsigned long start;
unsigned long last;
unsigned long __subtree_last;
unsigned int ref_cnt;
int flags;
};
extern void
usnic_uiom_interval_tree_insert(struct usnic_uiom_interval_node *node,
struct rb_root *root);
extern void
usnic_uiom_interval_tree_remove(struct usnic_uiom_interval_node *node,
struct rb_root *root);
extern struct usnic_uiom_interval_node *
usnic_uiom_interval_tree_iter_first(struct rb_root *root,
unsigned long start,
unsigned long last);
extern struct usnic_uiom_interval_node *
usnic_uiom_interval_tree_iter_next(struct usnic_uiom_interval_node *node,
unsigned long start, unsigned long last);
/*
* Inserts {start...last} into {root}. If there are overlaps,
* nodes will be broken up and merged
*/
int usnic_uiom_insert_interval(struct rb_root *root,
unsigned long start, unsigned long last,
int flags);
/*
* Removed {start...last} from {root}. The nodes removed are returned in
* 'removed.' The caller is responsibile for freeing memory of nodes in
* 'removed.'
*/
void usnic_uiom_remove_interval(struct rb_root *root,
unsigned long start, unsigned long last,
struct list_head *removed);
/*
* Returns {start...last} - {root} (relative complement of {start...last} in
* {root}) in diff_set sorted ascendingly
*/
int usnic_uiom_get_intervals_diff(unsigned long start,
unsigned long last, int flags,
int flag_mask,
struct rb_root *root,
struct list_head *diff_set);
/* Call this to free diff_set returned by usnic_uiom_get_intervals_diff */
void usnic_uiom_put_interval_set(struct list_head *intervals);
#endif /* USNIC_UIOM_INTERVAL_TREE_H_ */

467
drivers/infiniband/hw/usnic/usnic_vnic.c 100644
View File

@ -0,0 +1,467 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/pci.h>
#include "usnic_ib.h"
#include "vnic_resource.h"
#include "usnic_log.h"
#include "usnic_vnic.h"
struct usnic_vnic {
struct vnic_dev *vdev;
struct vnic_dev_bar bar[PCI_NUM_RESOURCES];
struct usnic_vnic_res_chunk chunks[USNIC_VNIC_RES_TYPE_MAX];
spinlock_t res_lock;
};
static enum vnic_res_type _to_vnic_res_type(enum usnic_vnic_res_type res_type)
{
#define DEFINE_USNIC_VNIC_RES_AT(usnic_vnic_res_t, vnic_res_type, desc, val) \
vnic_res_type,
#define DEFINE_USNIC_VNIC_RES(usnic_vnic_res_t, vnic_res_type, desc) \
vnic_res_type,
static enum vnic_res_type usnic_vnic_type_2_vnic_type[] = {
USNIC_VNIC_RES_TYPES};
#undef DEFINE_USNIC_VNIC_RES
#undef DEFINE_USNIC_VNIC_RES_AT
if (res_type >= USNIC_VNIC_RES_TYPE_MAX)
return RES_TYPE_MAX;
return usnic_vnic_type_2_vnic_type[res_type];
}
const char *usnic_vnic_res_type_to_str(enum usnic_vnic_res_type res_type)
{
#define DEFINE_USNIC_VNIC_RES_AT(usnic_vnic_res_t, vnic_res_type, desc, val) \
desc,
#define DEFINE_USNIC_VNIC_RES(usnic_vnic_res_t, vnic_res_type, desc) \
desc,
static const char * const usnic_vnic_res_type_desc[] = {
USNIC_VNIC_RES_TYPES};
#undef DEFINE_USNIC_VNIC_RES
#undef DEFINE_USNIC_VNIC_RES_AT
if (res_type >= USNIC_VNIC_RES_TYPE_MAX)
return "unknown";
return usnic_vnic_res_type_desc[res_type];
}
const char *usnic_vnic_pci_name(struct usnic_vnic *vnic)
{
return pci_name(usnic_vnic_get_pdev(vnic));
}
int usnic_vnic_dump(struct usnic_vnic *vnic, char *buf,
int buf_sz,
void *hdr_obj,
int (*printtitle)(void *, char*, int),
int (*printcols)(char *, int),
int (*printrow)(void *, char *, int))
{
struct usnic_vnic_res_chunk *chunk;
struct usnic_vnic_res *res;
struct vnic_dev_bar *bar0;
int i, j, offset;
offset = 0;
bar0 = usnic_vnic_get_bar(vnic, 0);
offset += scnprintf(buf + offset, buf_sz - offset,
"VF:%hu BAR0 bus_addr=%pa vaddr=0x%p size=%ld ",
usnic_vnic_get_index(vnic),
&bar0->bus_addr,
bar0->vaddr, bar0->len);
if (printtitle)
offset += printtitle(hdr_obj, buf + offset, buf_sz - offset);
offset += scnprintf(buf + offset, buf_sz - offset, "\n");
offset += scnprintf(buf + offset, buf_sz - offset,
"|RES\t|CTRL_PIN\t\t|IN_USE\t");
if (printcols)
offset += printcols(buf + offset, buf_sz - offset);
offset += scnprintf(buf + offset, buf_sz - offset, "\n");
spin_lock(&vnic->res_lock);
for (i = 0; i < ARRAY_SIZE(vnic->chunks); i++) {
chunk = &vnic->chunks[i];
for (j = 0; j < chunk->cnt; j++) {
res = chunk->res[j];
offset += scnprintf(buf + offset, buf_sz - offset,
"|%s[%u]\t|0x%p\t|%u\t",
usnic_vnic_res_type_to_str(res->type),
res->vnic_idx, res->ctrl, !!res->owner);
if (printrow) {
offset += printrow(res->owner, buf + offset,
buf_sz - offset);
}
offset += scnprintf(buf + offset, buf_sz - offset,
"\n");
}
}
spin_unlock(&vnic->res_lock);
return offset;
}
void usnic_vnic_res_spec_update(struct usnic_vnic_res_spec *spec,
enum usnic_vnic_res_type trgt_type,
u16 cnt)
{
int i;
for (i = 0; i < USNIC_VNIC_RES_TYPE_MAX; i++) {
if (spec->resources[i].type == trgt_type) {
spec->resources[i].cnt = cnt;
return;
}
}
WARN_ON(1);
}
int usnic_vnic_res_spec_satisfied(const struct usnic_vnic_res_spec *min_spec,
struct usnic_vnic_res_spec *res_spec)
{
int found, i, j;
for (i = 0; i < USNIC_VNIC_RES_TYPE_MAX; i++) {
found = 0;
for (j = 0; j < USNIC_VNIC_RES_TYPE_MAX; j++) {
if (res_spec->resources[i].type !=
min_spec->resources[i].type)
continue;
found = 1;
if (min_spec->resources[i].cnt >
res_spec->resources[i].cnt)
return -EINVAL;
break;
}
if (!found)
return -EINVAL;
}
return 0;
}
int usnic_vnic_spec_dump(char *buf, int buf_sz,
struct usnic_vnic_res_spec *res_spec)
{
enum usnic_vnic_res_type res_type;
int res_cnt;
int i;
int offset = 0;
for (i = 0; i < USNIC_VNIC_RES_TYPE_MAX; i++) {
res_type = res_spec->resources[i].type;
res_cnt = res_spec->resources[i].cnt;
offset += scnprintf(buf + offset, buf_sz - offset,
"Res: %s Cnt: %d ",
usnic_vnic_res_type_to_str(res_type),
res_cnt);
}
return offset;
}
int usnic_vnic_check_room(struct usnic_vnic *vnic,
struct usnic_vnic_res_spec *res_spec)
{
int i;
enum usnic_vnic_res_type res_type;
int res_cnt;
for (i = 0; i < USNIC_VNIC_RES_TYPE_MAX; i++) {
res_type = res_spec->resources[i].type;
res_cnt = res_spec->resources[i].cnt;
if (res_type == USNIC_VNIC_RES_TYPE_EOL)
break;
if (res_cnt > usnic_vnic_res_free_cnt(vnic, res_type))
return -EBUSY;
}
return 0;
}
int usnic_vnic_res_cnt(struct usnic_vnic *vnic,
enum usnic_vnic_res_type type)
{
return vnic->chunks[type].cnt;
}
int usnic_vnic_res_free_cnt(struct usnic_vnic *vnic,
enum usnic_vnic_res_type type)
{
return vnic->chunks[type].free_cnt;
}
struct usnic_vnic_res_chunk *
usnic_vnic_get_resources(struct usnic_vnic *vnic, enum usnic_vnic_res_type type,
int cnt, void *owner)
{
struct usnic_vnic_res_chunk *src, *ret;
struct usnic_vnic_res *res;
int i;
if (usnic_vnic_res_free_cnt(vnic, type) < cnt || cnt < 1 || !owner)
return ERR_PTR(-EINVAL);
ret = kzalloc(sizeof(*ret), GFP_ATOMIC);
if (!ret) {
usnic_err("Failed to allocate chunk for %s - Out of memory\n",
usnic_vnic_pci_name(vnic));
return ERR_PTR(-ENOMEM);
}
ret->res = kzalloc(sizeof(*(ret->res))*cnt, GFP_ATOMIC);
if (!ret->res) {
usnic_err("Failed to allocate resources for %s. Out of memory\n",
usnic_vnic_pci_name(vnic));
kfree(ret);
return ERR_PTR(-ENOMEM);
}
spin_lock(&vnic->res_lock);
src = &vnic->chunks[type];
for (i = 0; i < src->cnt && ret->cnt < cnt; i++) {
res = src->res[i];
if (!res->owner) {
src->free_cnt--;
res->owner = owner;
ret->res[ret->cnt++] = res;
}
}
spin_unlock(&vnic->res_lock);
ret->type = type;
ret->vnic = vnic;
WARN_ON(ret->cnt != cnt);
return ret;
}
void usnic_vnic_put_resources(struct usnic_vnic_res_chunk *chunk)
{
struct usnic_vnic_res *res;
int i;
struct usnic_vnic *vnic = chunk->vnic;
spin_lock(&vnic->res_lock);
while ((i = --chunk->cnt) >= 0) {
res = chunk->res[i];
chunk->res[i] = NULL;
res->owner = NULL;
vnic->chunks[res->type].free_cnt++;
}
spin_unlock(&vnic->res_lock);
kfree(chunk->res);
kfree(chunk);
}
u16 usnic_vnic_get_index(struct usnic_vnic *vnic)
{
return usnic_vnic_get_pdev(vnic)->devfn - 1;
}
static int usnic_vnic_alloc_res_chunk(struct usnic_vnic *vnic,
enum usnic_vnic_res_type type,
struct usnic_vnic_res_chunk *chunk)
{
int cnt, err, i;
struct usnic_vnic_res *res;
cnt = vnic_dev_get_res_count(vnic->vdev, _to_vnic_res_type(type));
if (cnt < 1)
return -EINVAL;
chunk->cnt = chunk->free_cnt = cnt;
chunk->res = kzalloc(sizeof(*(chunk->res))*cnt, GFP_KERNEL);
if (!chunk->res)
return -ENOMEM;
for (i = 0; i < cnt; i++) {
res = kzalloc(sizeof(*res), GFP_KERNEL);
if (!res) {
err = -ENOMEM;
goto fail;
}
res->type = type;
res->vnic_idx = i;
res->vnic = vnic;
res->ctrl = vnic_dev_get_res(vnic->vdev,
_to_vnic_res_type(type), i);
chunk->res[i] = res;
}
chunk->vnic = vnic;
return 0;
fail:
for (i--; i >= 0; i--)
kfree(chunk->res[i]);
kfree(chunk->res);
return err;
}
static void usnic_vnic_free_res_chunk(struct usnic_vnic_res_chunk *chunk)
{
int i;
for (i = 0; i < chunk->cnt; i++)
kfree(chunk->res[i]);
kfree(chunk->res);
}
static int usnic_vnic_discover_resources(struct pci_dev *pdev,
struct usnic_vnic *vnic)
{
enum usnic_vnic_res_type res_type;
int i;
int err = 0;
for (i = 0; i < ARRAY_SIZE(vnic->bar); i++) {
if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
continue;
vnic->bar[i].len = pci_resource_len(pdev, i);
vnic->bar[i].vaddr = pci_iomap(pdev, i, vnic->bar[i].len);
if (!vnic->bar[i].vaddr) {
usnic_err("Cannot memory-map BAR %d, aborting\n",
i);
err = -ENODEV;
goto out_clean_bar;
}
vnic->bar[i].bus_addr = pci_resource_start(pdev, i);
}
vnic->vdev = vnic_dev_register(NULL, pdev, pdev, vnic->bar,
ARRAY_SIZE(vnic->bar));
if (!vnic->vdev) {
usnic_err("Failed to register device %s\n",
pci_name(pdev));
err = -EINVAL;
goto out_clean_bar;
}
for (res_type = USNIC_VNIC_RES_TYPE_EOL + 1;
res_type < USNIC_VNIC_RES_TYPE_MAX; res_type++) {
err = usnic_vnic_alloc_res_chunk(vnic, res_type,
&vnic->chunks[res_type]);
if (err) {
usnic_err("Failed to alloc res %s with err %d\n",
usnic_vnic_res_type_to_str(res_type),
err);
goto out_clean_chunks;
}
}
return 0;
out_clean_chunks:
for (res_type--; res_type > USNIC_VNIC_RES_TYPE_EOL; res_type--)
usnic_vnic_free_res_chunk(&vnic->chunks[res_type]);
vnic_dev_unregister(vnic->vdev);
out_clean_bar:
for (i = 0; i < ARRAY_SIZE(vnic->bar); i++) {
if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
continue;
if (!vnic->bar[i].vaddr)
break;
iounmap(vnic->bar[i].vaddr);
}
return err;
}
struct pci_dev *usnic_vnic_get_pdev(struct usnic_vnic *vnic)
{
return vnic_dev_get_pdev(vnic->vdev);
}
struct vnic_dev_bar *usnic_vnic_get_bar(struct usnic_vnic *vnic,
int bar_num)
{
return (bar_num < ARRAY_SIZE(vnic->bar)) ? &vnic->bar[bar_num] : NULL;
}
static void usnic_vnic_release_resources(struct usnic_vnic *vnic)
{
int i;
struct pci_dev *pdev;
enum usnic_vnic_res_type res_type;
pdev = usnic_vnic_get_pdev(vnic);
for (res_type = USNIC_VNIC_RES_TYPE_EOL + 1;
res_type < USNIC_VNIC_RES_TYPE_MAX; res_type++)
usnic_vnic_free_res_chunk(&vnic->chunks[res_type]);
vnic_dev_unregister(vnic->vdev);
for (i = 0; i < ARRAY_SIZE(vnic->bar); i++) {
if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
continue;
iounmap(vnic->bar[i].vaddr);
}
}
struct usnic_vnic *usnic_vnic_alloc(struct pci_dev *pdev)
{
struct usnic_vnic *vnic;
int err = 0;
if (!pci_is_enabled(pdev)) {
usnic_err("PCI dev %s is disabled\n", pci_name(pdev));
return ERR_PTR(-EINVAL);
}
vnic = kzalloc(sizeof(*vnic), GFP_KERNEL);
if (!vnic) {
usnic_err("Failed to alloc vnic for %s - out of memory\n",
pci_name(pdev));
return ERR_PTR(-ENOMEM);
}
spin_lock_init(&vnic->res_lock);
err = usnic_vnic_discover_resources(pdev, vnic);
if (err) {
usnic_err("Failed to discover %s resources with err %d\n",
pci_name(pdev), err);
goto out_free_vnic;
}
usnic_dbg("Allocated vnic for %s\n", usnic_vnic_pci_name(vnic));
return vnic;
out_free_vnic:
kfree(vnic);
return ERR_PTR(err);
}
void usnic_vnic_free(struct usnic_vnic *vnic)
{
usnic_vnic_release_resources(vnic);
kfree(vnic);
}

103
drivers/infiniband/hw/usnic/usnic_vnic.h 100644
View File

@ -0,0 +1,103 @@
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_VNIC_H_
#define USNIC_VNIC_H_
#include <linux/pci.h>
#include "vnic_dev.h"
/* =USNIC_VNIC_RES_TYPE= =VNIC_RES= =DESC= */
#define USNIC_VNIC_RES_TYPES \
DEFINE_USNIC_VNIC_RES_AT(EOL, RES_TYPE_EOL, "EOL", 0) \
DEFINE_USNIC_VNIC_RES(WQ, RES_TYPE_WQ, "WQ") \
DEFINE_USNIC_VNIC_RES(RQ, RES_TYPE_RQ, "RQ") \
DEFINE_USNIC_VNIC_RES(CQ, RES_TYPE_CQ, "CQ") \
DEFINE_USNIC_VNIC_RES(INTR, RES_TYPE_INTR_CTRL, "INT") \
DEFINE_USNIC_VNIC_RES(MAX, RES_TYPE_MAX, "MAX")\
#define DEFINE_USNIC_VNIC_RES_AT(usnic_vnic_res_t, vnic_res_type, desc, val) \
USNIC_VNIC_RES_TYPE_##usnic_vnic_res_t = val,
#define DEFINE_USNIC_VNIC_RES(usnic_vnic_res_t, vnic_res_type, desc) \
USNIC_VNIC_RES_TYPE_##usnic_vnic_res_t,
enum usnic_vnic_res_type {
USNIC_VNIC_RES_TYPES
};
#undef DEFINE_USNIC_VNIC_RES
#undef DEFINE_USNIC_VNIC_RES_AT
struct usnic_vnic_res {
enum usnic_vnic_res_type type;
unsigned int vnic_idx;
struct usnic_vnic *vnic;
void __iomem *ctrl;
void *owner;
};
struct usnic_vnic_res_chunk {
enum usnic_vnic_res_type type;
int cnt;
int free_cnt;
struct usnic_vnic_res **res;
struct usnic_vnic *vnic;
};
struct usnic_vnic_res_desc {
enum usnic_vnic_res_type type;
uint16_t cnt;
};
struct usnic_vnic_res_spec {
struct usnic_vnic_res_desc resources[USNIC_VNIC_RES_TYPE_MAX];
};
const char *usnic_vnic_res_type_to_str(enum usnic_vnic_res_type res_type);
const char *usnic_vnic_pci_name(struct usnic_vnic *vnic);
int usnic_vnic_dump(struct usnic_vnic *vnic, char *buf, int buf_sz,
void *hdr_obj,
int (*printtitle)(void *, char*, int),
int (*printcols)(char *, int),
int (*printrow)(void *, char *, int));
void usnic_vnic_res_spec_update(struct usnic_vnic_res_spec *spec,
enum usnic_vnic_res_type trgt_type,
u16 cnt);
int usnic_vnic_res_spec_satisfied(const struct usnic_vnic_res_spec *min_spec,
struct usnic_vnic_res_spec *res_spec);
int usnic_vnic_spec_dump(char *buf, int buf_sz,
struct usnic_vnic_res_spec *res_spec);
int usnic_vnic_check_room(struct usnic_vnic *vnic,
struct usnic_vnic_res_spec *res_spec);
int usnic_vnic_res_cnt(struct usnic_vnic *vnic,
enum usnic_vnic_res_type type);
int usnic_vnic_res_free_cnt(struct usnic_vnic *vnic,
enum usnic_vnic_res_type type);
struct usnic_vnic_res_chunk *
usnic_vnic_get_resources(struct usnic_vnic *vnic,
enum usnic_vnic_res_type type,
int cnt,
void *owner);
void usnic_vnic_put_resources(struct usnic_vnic_res_chunk *chunk);
struct pci_dev *usnic_vnic_get_pdev(struct usnic_vnic *vnic);
struct vnic_dev_bar *usnic_vnic_get_bar(struct usnic_vnic *vnic,
int bar_num);
struct usnic_vnic *usnic_vnic_alloc(struct pci_dev *pdev);
void usnic_vnic_free(struct usnic_vnic *vnic);
u16 usnic_vnic_get_index(struct usnic_vnic *vnic);
#endif /*!USNIC_VNIC_H_*/