diff options
| author | Upinder Malhi <umalhi@cisco.com> | 2013-09-10 03:38:16 +0000 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2014-01-14 00:44:28 -0800 |
| commit | e3cf00d0a87f025db5855a43a67c67a41fa79fef (patch) | |
| tree | 34ab93de5918af08434dcf063e4ff5ae78425989 | |
| parent | 7e22e91102c6b9df7c4ae2168910e19d2bb14cd6 (diff) | |
| download | linux-next-e3cf00d0a87f025db5855a43a67c67a41fa79fef.tar.gz | |
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>
30 files changed, 4904 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 31a046213274..9bc170ee9a2a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -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 diff --git a/drivers/infiniband/Kconfig b/drivers/infiniband/Kconfig index 5ceda710f516..10219ee92191 100644 --- a/drivers/infiniband/Kconfig +++ b/drivers/infiniband/Kconfig @@ -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" diff --git a/drivers/infiniband/Makefile b/drivers/infiniband/Makefile index 1fe69888515f..bf508b5550c4 100644 --- a/drivers/infiniband/Makefile +++ b/drivers/infiniband/Makefile @@ -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/ diff --git a/drivers/infiniband/hw/usnic/Kconfig b/drivers/infiniband/hw/usnic/Kconfig new file mode 100644 index 000000000000..2cc8ba00b34b --- /dev/null +++ b/drivers/infiniband/hw/usnic/Kconfig @@ -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. diff --git a/drivers/infiniband/hw/usnic/Makefile b/drivers/infiniband/hw/usnic/Makefile new file mode 100644 index 000000000000..99fb2db47cd5 --- /dev/null +++ b/drivers/infiniband/hw/usnic/Makefile @@ -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 \ diff --git a/drivers/infiniband/hw/usnic/usnic.h b/drivers/infiniband/hw/usnic/usnic.h new file mode 100644 index 000000000000..d741c76bc4be --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic.h @@ -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_ */ diff --git a/drivers/infiniband/hw/usnic/usnic_abi.h b/drivers/infiniband/hw/usnic/usnic_abi.h new file mode 100644 index 000000000000..510b7d702465 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_abi.h @@ -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 */ diff --git a/drivers/infiniband/hw/usnic/usnic_common_pkt_hdr.h b/drivers/infiniband/hw/usnic/usnic_common_pkt_hdr.h new file mode 100644 index 000000000000..393567266142 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_common_pkt_hdr.h @@ -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 */ diff --git a/drivers/infiniband/hw/usnic/usnic_common_util.h b/drivers/infiniband/hw/usnic/usnic_common_util.h new file mode 100644 index 000000000000..128550a4f9e2 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_common_util.h @@ -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 */ diff --git a/drivers/infiniband/hw/usnic/usnic_debugfs.c b/drivers/infiniband/hw/usnic/usnic_debugfs.c new file mode 100644 index 000000000000..91386df025ae --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_debugfs.c @@ -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; +} diff --git a/drivers/infiniband/hw/usnic/usnic_debugfs.h b/drivers/infiniband/hw/usnic/usnic_debugfs.h new file mode 100644 index 000000000000..914a330dd5e7 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_debugfs.h @@ -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_ */ diff --git a/drivers/infiniband/hw/usnic/usnic_fwd.c b/drivers/infiniband/hw/usnic/usnic_fwd.c new file mode 100644 index 000000000000..8e42216362e7 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_fwd.c @@ -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; +} diff --git a/drivers/infiniband/hw/usnic/usnic_fwd.h b/drivers/infiniband/hw/usnic/usnic_fwd.h new file mode 100644 index 000000000000..6973901da8af --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_fwd.h @@ -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_ */ diff --git a/drivers/infiniband/hw/usnic/usnic_ib.h b/drivers/infiniband/hw/usnic/usnic_ib.h new file mode 100644 index 000000000000..3511c8521f30 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_ib.h @@ -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_ */ diff --git a/drivers/infiniband/hw/usnic/usnic_ib_main.c b/drivers/infiniband/hw/usnic/usnic_ib_main.c new file mode 100644 index 000000000000..dc09c12435b9 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_ib_main.c @@ -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 */ diff --git a/drivers/infiniband/hw/usnic/usnic_ib_qp_grp.c b/drivers/infiniband/hw/usnic/usnic_ib_qp_grp.c new file mode 100644 index 000000000000..ca5fa6ad59ac --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_ib_qp_grp.c @@ -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); +} diff --git a/drivers/infiniband/hw/usnic/usnic_ib_qp_grp.h b/drivers/infiniband/hw/usnic/usnic_ib_qp_grp.h new file mode 100644 index 000000000000..6416a956dc4a --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_ib_qp_grp.h @@ -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_ */ diff --git a/drivers/infiniband/hw/usnic/usnic_ib_sysfs.c b/drivers/infiniband/hw/usnic/usnic_ib_sysfs.c new file mode 100644 index 000000000000..bad985e9df08 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_ib_sysfs.c @@ -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); +} diff --git a/drivers/infiniband/hw/usnic/usnic_ib_sysfs.h b/drivers/infiniband/hw/usnic/usnic_ib_sysfs.h new file mode 100644 index 000000000000..0d09b493cd02 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_ib_sysfs.h @@ -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_ */ diff --git a/drivers/infiniband/hw/usnic/usnic_ib_verbs.c b/drivers/infiniband/hw/usnic/usnic_ib_verbs.c new file mode 100644 index 000000000000..8f8dfa2672b0 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_ib_verbs.c @@ -0,0 +1,736 @@ +/* + * 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 */ diff --git a/drivers/infiniband/hw/usnic/usnic_ib_verbs.h b/drivers/infiniband/hw/usnic/usnic_ib_verbs.h new file mode 100644 index 000000000000..bb864f5aed70 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_ib_verbs.h @@ -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 */ diff --git a/drivers/infiniband/hw/usnic/usnic_log.h b/drivers/infiniband/hw/usnic/usnic_log.h new file mode 100644 index 000000000000..75777a66c684 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_log.h @@ -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_ */ diff --git a/drivers/infiniband/hw/usnic/usnic_transport.c b/drivers/infiniband/hw/usnic/usnic_transport.c new file mode 100644 index 000000000000..723bd6c3a8f8 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_transport.c @@ -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); +} diff --git a/drivers/infiniband/hw/usnic/usnic_transport.h b/drivers/infiniband/hw/usnic/usnic_transport.h new file mode 100644 index 000000000000..091fdaf4d25a --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_transport.h @@ -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 */ diff --git a/drivers/infiniband/hw/usnic/usnic_uiom.c b/drivers/infiniband/hw/usnic/usnic_uiom.c new file mode 100644 index 000000000000..c841a752dbd0 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_uiom.c @@ -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(¤t->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(¤t->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); +} diff --git a/drivers/infiniband/hw/usnic/usnic_uiom.h b/drivers/infiniband/hw/usnic/usnic_uiom.h new file mode 100644 index 000000000000..70440996e8f2 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_uiom.h @@ -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_ */ diff --git a/drivers/infiniband/hw/usnic/usnic_uiom_interval_tree.c b/drivers/infiniband/hw/usnic/usnic_uiom_interval_tree.c new file mode 100644 index 000000000000..7e1dafccb11e --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_uiom_interval_tree.c @@ -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) diff --git a/drivers/infiniband/hw/usnic/usnic_uiom_interval_tree.h b/drivers/infiniband/hw/usnic/usnic_uiom_interval_tree.h new file mode 100644 index 000000000000..030ba6e68a52 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_uiom_interval_tree.h @@ -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_ */ diff --git a/drivers/infiniband/hw/usnic/usnic_vnic.c b/drivers/infiniband/hw/usnic/usnic_vnic.c new file mode 100644 index 000000000000..656b88c39eda --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_vnic.c @@ -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); +} diff --git a/drivers/infiniband/hw/usnic/usnic_vnic.h b/drivers/infiniband/hw/usnic/usnic_vnic.h new file mode 100644 index 000000000000..14d931a8829d --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_vnic.h @@ -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_*/ |