/*
* Copyright (c) 2009-2010 Chelsio, Inc. 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/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/ethtool.h>
#include <linux/rtnetlink.h>
#include <linux/inetdevice.h>
#include <net/addrconf.h>
#include <linux/io.h>
#include <asm/irq.h>
#include <asm/byteorder.h>
#include <rdma/iw_cm.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_smi.h>
#include <rdma/ib_umem.h>
#include <rdma/ib_user_verbs.h>
#include "iw_cxgb4.h"
static int fastreg_support = 1;
module_param(fastreg_support, int, 0644);
MODULE_PARM_DESC(fastreg_support, "Advertise fastreg support (default=1)");
static void c4iw_dealloc_ucontext(struct ib_ucontext *context)
{
struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context);
struct c4iw_dev *rhp;
struct c4iw_mm_entry *mm, *tmp;
pr_debug("context %p\n", context);
rhp = to_c4iw_dev(ucontext->ibucontext.device);
list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
kfree(mm);
c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx);
}
static int c4iw_alloc_ucontext(struct ib_ucontext *ucontext,
struct ib_udata *udata)
{
struct ib_device *ibdev = ucontext->device;
struct c4iw_ucontext *context = to_c4iw_ucontext(ucontext);
struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
struct c4iw_alloc_ucontext_resp uresp;
int ret = 0;
struct c4iw_mm_entry *mm = NULL;
pr_debug("ibdev %p\n", ibdev);
c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx);
INIT_LIST_HEAD(&context->mmaps);
spin_lock_init(&context->mmap_lock);
if (udata->outlen < sizeof(uresp) - sizeof(uresp.reserved)) {
pr_err_once("Warning - downlevel libcxgb4 (non-fatal), device status page disabled\n");
rhp->rdev.flags |= T4_STATUS_PAGE_DISABLED;
} else {
mm = kmalloc(sizeof(*mm), GFP_KERNEL);
if (!mm) {
ret = -ENOMEM;
goto err;
}
uresp.status_page_size = PAGE_SIZE;
spin_lock(&context->mmap_lock);
uresp.status_page_key = context->key;
context->key += PAGE_SIZE;
spin_unlock(&context->mmap_lock);
ret = ib_copy_to_udata(udata, &uresp,
sizeof(uresp) - sizeof(uresp.reserved));
if (ret)
goto err_mm;
mm->key = uresp.status_page_key;
mm->addr = virt_to_phys(rhp->rdev.status_page);
mm->len = PAGE_SIZE;
mm->vaddr = NULL;
mm->dma_addr = 0;
insert_flag_to_mmap(&rhp->rdev, mm, mm->addr);
insert_mmap(context, mm);
}
return 0;
err_mm:
kfree(mm);
err:
return ret;
}
static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
{
int len = vma->vm_end - vma->vm_start;
u32 key = vma->vm_pgoff << PAGE_SHIFT;
struct c4iw_rdev *rdev;
int ret = 0;
struct c4iw_mm_entry *mm;
struct c4iw_ucontext *ucontext;
u64 addr;
u8 mmap_flag;
size_t size;
void *vaddr;
unsigned long vm_pgoff;
dma_addr_t dma_addr;
pr_debug("pgoff 0x%lx key 0x%x len %d\n", vma->vm_pgoff,
key, len);
if (vma->vm_start & (PAGE_SIZE-1))
return -EINVAL;
rdev = &(to_c4iw_dev(context->device)->rdev);
ucontext = to_c4iw_ucontext(context);
mm = remove_mmap(ucontext, key, len);
if (!mm)
return -EINVAL;
addr = mm->addr;
vaddr = mm->vaddr;
dma_addr = mm->dma_addr;
size = mm->len;
mmap_flag = mm->mmap_flag;
kfree(mm);
switch (mmap_flag) {
case CXGB4_MMAP_BAR:
ret = io_remap_pfn_range(vma, vma->vm_start, addr >> PAGE_SHIFT,
len,
pgprot_noncached(vma->vm_page_prot));
break;
case CXGB4_MMAP_BAR_WC:
ret = io_remap_pfn_range(vma, vma->vm_start,
addr >> PAGE_SHIFT,
len, t4_pgprot_wc(vma->vm_page_prot));
break;
case CXGB4_MMAP_CONTIG:
ret = io_remap_pfn_range(vma, vma->vm_start,
addr >> PAGE_SHIFT,
len, vma->vm_page_prot);
break;
case CXGB4_MMAP_NON_CONTIG:
vm_pgoff = vma->vm_pgoff;
vma->vm_pgoff = 0;
ret = dma_mmap_coherent(&rdev->lldi.pdev->dev, vma,
vaddr, dma_addr, size);
vma->vm_pgoff = vm_pgoff;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int c4iw_deallocate_pd(struct ib_pd *pd, struct ib_udata *udata)
{
struct c4iw_dev *rhp;
struct c4iw_pd *php;
php = to_c4iw_pd(pd);
rhp = php->rhp;
pr_debug("ibpd %p pdid 0x%x\n", pd, php->pdid);
c4iw_put_resource(&rhp->rdev.resource.pdid_table, php->pdid);
mutex_lock(&rhp->rdev.stats.lock);
rhp->rdev.stats.pd.cur--;
mutex_unlock(&rhp->rdev.stats.lock);
return 0;
}
static int c4iw_allocate_pd(struct ib_pd *pd, struct ib_udata *udata)
{
struct c4iw_pd *php = to_c4iw_pd(pd);
struct ib_device *ibdev = pd->device;
u32 pdid;
struct c4iw_dev *rhp;
pr_debug("ibdev %p\n", ibdev);
rhp = (struct c4iw_dev *) ibdev;
pdid = c4iw_get_resource(&rhp->rdev.resource.pdid_table);
if (!pdid)
return -EINVAL;
php->pdid = pdid;
php->rhp = rhp;
if (udata) {
struct c4iw_alloc_pd_resp uresp = {.pdid = php->pdid};
if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
c4iw_deallocate_pd(&php->ibpd, udata);
return -EFAULT;
}
}
mutex_lock(&rhp->rdev.stats.lock);
rhp->rdev.stats.pd.cur++;
if (rhp->rdev.stats.pd.cur > rhp->rdev.stats.pd.max)
rhp->rdev.stats.pd.max = rhp->rdev.stats.pd.cur;
mutex_unlock(&rhp->rdev.stats.lock);
pr_debug("pdid 0x%0x ptr 0x%p\n", pdid, php);
return 0;
}
static int c4iw_query_gid(struct ib_device *ibdev, u32 port, int index,
union ib_gid *gid)
{
struct c4iw_dev *dev;
pr_debug("ibdev %p, port %u, index %d, gid %p\n",
ibdev, port, index, gid);
if (!port)
return -EINVAL;
dev = to_c4iw_dev(ibdev);
memset(&(gid->raw[0]), 0, sizeof(gid->raw));
memcpy(&(gid->raw[0]), dev->rdev.lldi.ports[port-1]->dev_addr, 6);
return 0;
}
static int c4iw_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
struct ib_udata *uhw)
{
struct c4iw_dev *dev;
pr_debug("ibdev %p\n", ibdev);
if (uhw->inlen || uhw->outlen)
return -EINVAL;
dev = to_c4iw_dev(ibdev);
addrconf_addr_eui48((u8 *)&props->sys_image_guid,
dev->rdev.lldi.ports[0]->dev_addr);
props->hw_ver = CHELSIO_CHIP_RELEASE(dev->rdev.lldi.adapter_type);
props->fw_ver = dev->rdev.lldi.fw_vers;
props->device_cap_flags = IB_DEVICE_MEM_WINDOW;
props->kernel_cap_flags = IBK_LOCAL_DMA_LKEY;
if (fastreg_support)
props->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
props->page_size_cap = T4_PAGESIZE_MASK;
props->vendor_id = (u32)dev->rdev.lldi.pdev->vendor;
props->vendor_part_id = (u32)dev->rdev.lldi.pdev->device;
props->max_mr_size = T4_MAX_MR_SIZE;
props->max_qp = dev->rdev.lldi.vr->qp.size / 2;
props->max_srq = dev->rdev.lldi.vr->srq.size;
props->max_qp_wr = dev->rdev.hw_queue.t4_max_qp_depth;
props->max_srq_wr = dev->rdev.hw_queue.t4_max_qp_depth;
props->max_send_sge = min(T4_MAX_SEND_SGE, T4_MAX_WRITE_SGE);
props->max_recv_sge = T4_MAX_RECV_SGE;
props->max_srq_sge = T4_MAX_RECV_SGE;
props->max_sge_rd = 1;
props->max_res_rd_atom = dev->rdev.lldi.max_ird_adapter;
props->max_qp_rd_atom = min(dev->rdev.lldi.max_ordird_qp,
c4iw_max_read_depth);
props->max_qp_init_rd_atom = props->max_qp_rd_atom;
props->max_cq = dev->rdev.lldi.vr->qp.size;
props->max_cqe = dev->rdev.hw_queue.t4_max_cq_depth;
props->max_mr = c4iw_num_stags(&dev->rdev);
props->max_pd = T4_MAX_NUM_PD;
props->local_ca_ack_delay = 0;
props->max_fast_reg_page_list_len =
t4_max_fr_depth(dev->rdev.lldi.ulptx_memwrite_dsgl && use_dsgl);
return 0;
}
static int c4iw_query_port(struct ib_device *ibdev, u32 port,
struct ib_port_attr *props)
{
int ret = 0;
pr_debug("ibdev %p\n", ibdev);
ret = ib_get_eth_speed(ibdev, port, &props->active_speed,
&props->active_width);
props->port_cap_flags =
IB_PORT_CM_SUP |
IB_PORT_SNMP_TUNNEL_SUP |
IB_PORT_REINIT_SUP |
IB_PORT_DEVICE_MGMT_SUP |
IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
props->gid_tbl_len = 1;
props->max_msg_sz = -1;
return ret;
}
static ssize_t hw_rev_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct c4iw_dev *c4iw_dev =
rdma_device_to_drv_device(dev, struct c4iw_dev, ibdev);
pr_debug("dev 0x%p\n", dev);
return sysfs_emit(
buf, "%d\n",
CHELSIO_CHIP_RELEASE(c4iw_dev->rdev.lldi.adapter_type));
}
static DEVICE_ATTR_RO(hw_rev);
static ssize_t hca_type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct c4iw_dev *c4iw_dev =
rdma_device_to_drv_device(dev, struct c4iw_dev, ibdev);
struct ethtool_drvinfo info;
struct net_device *lldev = c4iw_dev->rdev.lldi.ports[0];
pr_debug("dev 0x%p\n", dev);
lldev->ethtool_ops->get_drvinfo(lldev, &info);
return sysfs_emit(buf, "%s\n", info.driver);
}
static DEVICE_ATTR_RO(hca_type);
static ssize_t board_id_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct c4iw_dev *c4iw_dev =
rdma_device_to_drv_device(dev, struct c4iw_dev, ibdev);
pr_debug("dev 0x%p\n", dev);
return sysfs_emit(buf, "%x.%x\n", c4iw_dev->rdev.lldi.pdev->vendor,
c4iw_dev->rdev.lldi.pdev->device);
}
static DEVICE_ATTR_RO(board_id);
enum counters {
IP4INSEGS,
IP4OUTSEGS,
IP4RETRANSSEGS,
IP4OUTRSTS,
IP6INSEGS,
IP6OUTSEGS,
IP6RETRANSSEGS,
IP6OUTRSTS,
NR_COUNTERS
};
static const struct rdma_stat_desc cxgb4_descs[] = {
[IP4INSEGS].name = "ip4InSegs",
[IP4OUTSEGS].name = "ip4OutSegs",
[IP4RETRANSSEGS].name = "ip4RetransSegs",
[IP4OUTRSTS].name = "ip4OutRsts",
[IP6INSEGS].name = "ip6InSegs",
[IP6OUTSEGS].name = "ip6OutSegs",
[IP6RETRANSSEGS].name = "ip6RetransSegs",
[IP6OUTRSTS].name = "ip6OutRsts"
};
static struct rdma_hw_stats *c4iw_alloc_device_stats(struct ib_device *ibdev)
{
BUILD_BUG_ON(ARRAY_SIZE(cxgb4_descs) != NR_COUNTERS);
/* FIXME: these look like port stats */
return rdma_alloc_hw_stats_struct(cxgb4_descs, NR_COUNTERS,
RDMA_HW_STATS_DEFAULT_LIFESPAN);
}
static int c4iw_get_mib(struct ib_device *ibdev,
struct rdma_hw_stats *stats,
u32 port, int index)
{
struct tp_tcp_stats v4, v6;
struct c4iw_dev *c4iw_dev = to_c4iw_dev(ibdev);
cxgb4_get_tcp_stats(c4iw_dev->rdev.lldi.pdev, &v4, &v6);
stats->value[IP4INSEGS] = v4.tcp_in_segs;
stats->value[IP4OUTSEGS] = v4.tcp_out_segs;
stats->value[IP4RETRANSSEGS] = v4.tcp_retrans_segs;
stats->value[IP4OUTRSTS] = v4.tcp_out_rsts;
stats->value[IP6INSEGS] = v6.tcp_in_segs;
stats->value[IP6OUTSEGS] = v6.tcp_out_segs;
stats->value[IP6RETRANSSEGS] = v6.tcp_retrans_segs;
stats->value[IP6OUTRSTS] = v6.tcp_out_rsts;
return stats->num_counters;
}
static struct attribute *c4iw_class_attributes[] = {
&dev_attr_hw_rev.attr,
&dev_attr_hca_type.attr,
&dev_attr_board_id.attr,
NULL
};
static const struct attribute_group c4iw_attr_group = {
.attrs = c4iw_class_attributes,
};
static int c4iw_port_immutable(struct ib_device *ibdev, u32 port_num,
struct ib_port_immutable *immutable)
{
struct ib_port_attr attr;
int err;
immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
err = ib_query_port(ibdev, port_num, &attr);
if (err)
return err;
immutable->gid_tbl_len = attr.gid_tbl_len;
return 0;
}
static void get_dev_fw_str(struct ib_device *dev, char *str)
{
struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
ibdev);
pr_debug("dev 0x%p\n", dev);
snprintf(str, IB_FW_VERSION_NAME_MAX, "%u.%u.%u.%u",
FW_HDR_FW_VER_MAJOR_G(c4iw_dev->rdev.lldi.fw_vers),
FW_HDR_FW_VER_MINOR_G(c4iw_dev->rdev.lldi.fw_vers),
FW_HDR_FW_VER_MICRO_G(c4iw_dev->rdev.lldi.fw_vers),
FW_HDR_FW_VER_BUILD_G(c4iw_dev->rdev.lldi.fw_vers));
}
static const struct ib_device_ops c4iw_dev_ops = {
.owner = THIS_MODULE,
.driver_id = RDMA_DRIVER_CXGB4,
.uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION,
.alloc_hw_device_stats = c4iw_alloc_device_stats,
.alloc_mr = c4iw_alloc_mr,
.alloc_pd = c4iw_allocate_pd,
.alloc_ucontext = c4iw_alloc_ucontext,
.create_cq = c4iw_create_cq,
.create_qp = c4iw_create_qp,
.create_srq = c4iw_create_srq,
.dealloc_pd = c4iw_deallocate_pd,
.dealloc_ucontext = c4iw_dealloc_ucontext,
.dereg_mr = c4iw_dereg_mr,
.destroy_cq = c4iw_destroy_cq,
.destroy_qp = c4iw_destroy_qp,
.destroy_srq = c4iw_destroy_srq,
.device_group = &c4iw_attr_group,
.fill_res_cq_entry = c4iw_fill_res_cq_entry,
.fill_res_cm_id_entry = c4iw_fill_res_cm_id_entry,
.fill_res_mr_entry = c4iw_fill_res_mr_entry,
.get_dev_fw_str = get_dev_fw_str,
.get_dma_mr = c4iw_get_dma_mr,
.get_hw_stats = c4iw_get_mib,
.get_port_immutable = c4iw_port_immutable,
.iw_accept = c4iw_accept_cr,
.iw_add_ref = c4iw_qp_add_ref,
.iw_connect = c4iw_connect,
.iw_create_listen = c4iw_create_listen,
.iw_destroy_listen = c4iw_destroy_listen,
.iw_get_qp = c4iw_get_qp,
.iw_reject = c4iw_reject_cr,
.iw_rem_ref = c4iw_qp_rem_ref,
.map_mr_sg = c4iw_map_mr_sg,
.mmap = c4iw_mmap,
.modify_qp = c4iw_ib_modify_qp,
.modify_srq = c4iw_modify_srq,
.poll_cq = c4iw_poll_cq,
.post_recv = c4iw_post_receive,
.post_send = c4iw_post_send,
.post_srq_recv = c4iw_post_srq_recv,
.query_device = c4iw_query_device,
.query_gid = c4iw_query_gid,
.query_port = c4iw_query_port,
.query_qp = c4iw_ib_query_qp,
.reg_user_mr = c4iw_reg_user_mr,
.req_notify_cq = c4iw_arm_cq,
INIT_RDMA_OBJ_SIZE(ib_cq, c4iw_cq, ibcq),
INIT_RDMA_OBJ_SIZE(ib_mw, c4iw_mw, ibmw),
INIT_RDMA_OBJ_SIZE(ib_pd, c4iw_pd, ibpd),
INIT_RDMA_OBJ_SIZE(ib_qp, c4iw_qp, ibqp),
INIT_RDMA_OBJ_SIZE(ib_srq, c4iw_srq, ibsrq),
INIT_RDMA_OBJ_SIZE(ib_ucontext, c4iw_ucontext, ibucontext),
};
static int set_netdevs(struct ib_device *ib_dev, struct c4iw_rdev *rdev)
{
int ret;
int i;
for (i = 0; i < rdev->lldi.nports; i++) {
ret = ib_device_set_netdev(ib_dev, rdev->lldi.ports[i],
i + 1);
if (ret)
return ret;
}
return 0;
}
void c4iw_register_device(struct work_struct *work)
{
int ret;
struct uld_ctx *ctx = container_of(work, struct uld_ctx, reg_work);
struct c4iw_dev *dev = ctx->dev;
pr_debug("c4iw_dev %p\n", dev);
addrconf_addr_eui48((u8 *)&dev->ibdev.node_guid,
dev->rdev.lldi.ports[0]->dev_addr);
dev->ibdev.local_dma_lkey = 0;
dev->ibdev.node_type = RDMA_NODE_RNIC;
BUILD_BUG_ON(sizeof(C4IW_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX);
memcpy(dev->ibdev.node_desc, C4IW_NODE_DESC, sizeof(C4IW_NODE_DESC));
dev->ibdev.phys_port_cnt = dev->rdev.lldi.nports;
dev->ibdev.num_comp_vectors = dev->rdev.lldi.nciq;
dev->ibdev.dev.parent = &dev->rdev.lldi.pdev->dev;
memcpy(dev->ibdev.iw_ifname, dev->rdev.lldi.ports[0]->name,
sizeof(dev->ibdev.iw_ifname));
ib_set_device_ops(&dev->ibdev, &c4iw_dev_ops);
ret = set_netdevs(&dev->ibdev, &dev->rdev);
if (ret)
goto err_dealloc_ctx;
dma_set_max_seg_size(&dev->rdev.lldi.pdev->dev, UINT_MAX);
ret = ib_register_device(&dev->ibdev, "cxgb4_%d",
&dev->rdev.lldi.pdev->dev);
if (ret)
goto err_dealloc_ctx;
return;
err_dealloc_ctx:
pr_err("%s - Failed registering iwarp device: %d\n",
pci_name(ctx->lldi.pdev), ret);
c4iw_dealloc(ctx);
return;
}
void c4iw_unregister_device(struct c4iw_dev *dev)
{
pr_debug("c4iw_dev %p\n", dev);
ib_unregister_device(&dev->ibdev);
return;
}
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