- 根目录:
- drivers
- infiniband
- hw
- cxgb4
- device.c
/*
* 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/debugfs.h>
#include <rdma/ib_verbs.h>
#include "iw_cxgb4.h"
#define DRV_VERSION "0.1"
MODULE_AUTHOR("Steve Wise");
MODULE_DESCRIPTION("Chelsio T4 RDMA Driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(DRV_VERSION);
static LIST_HEAD(uld_ctx_list);
static DEFINE_MUTEX(dev_mutex);
static struct dentry *c4iw_debugfs_root;
struct c4iw_debugfs_data {
struct c4iw_dev *devp;
char *buf;
int bufsize;
int pos;
};
static int count_idrs(int id, void *p, void *data)
{
int *countp = data;
*countp = *countp + 1;
return 0;
}
static ssize_t debugfs_read(struct file *file, char __user *buf, size_t count,
loff_t *ppos)
{
struct c4iw_debugfs_data *d = file->private_data;
return simple_read_from_buffer(buf, count, ppos, d->buf, d->pos);
}
static int dump_qp(int id, void *p, void *data)
{
struct c4iw_qp *qp = p;
struct c4iw_debugfs_data *qpd = data;
int space;
int cc;
if (id != qp->wq.sq.qid)
return 0;
space = qpd->bufsize - qpd->pos - 1;
if (space == 0)
return 1;
if (qp->ep)
cc = snprintf(qpd->buf + qpd->pos, space,
"qp sq id %u rq id %u state %u onchip %u "
"ep tid %u state %u %pI4:%u->%pI4:%u\n",
qp->wq.sq.qid, qp->wq.rq.qid, (int)qp->attr.state,
qp->wq.sq.flags & T4_SQ_ONCHIP,
qp->ep->hwtid, (int)qp->ep->com.state,
&qp->ep->com.local_addr.sin_addr.s_addr,
ntohs(qp->ep->com.local_addr.sin_port),
&qp->ep->com.remote_addr.sin_addr.s_addr,
ntohs(qp->ep->com.remote_addr.sin_port));
else
cc = snprintf(qpd->buf + qpd->pos, space,
"qp sq id %u rq id %u state %u onchip %u\n",
qp->wq.sq.qid, qp->wq.rq.qid,
(int)qp->attr.state,
qp->wq.sq.flags & T4_SQ_ONCHIP);
if (cc < space)
qpd->pos += cc;
return 0;
}
static int qp_release(struct inode *inode, struct file *file)
{
struct c4iw_debugfs_data *qpd = file->private_data;
if (!qpd) {
printk(KERN_INFO "%s null qpd?\n", __func__);
return 0;
}
kfree(qpd->buf);
kfree(qpd);
return 0;
}
static int qp_open(struct inode *inode, struct file *file)
{
struct c4iw_debugfs_data *qpd;
int ret = 0;
int count = 1;
qpd = kmalloc(sizeof *qpd, GFP_KERNEL);
if (!qpd) {
ret = -ENOMEM;
goto out;
}
qpd->devp = inode->i_private;
qpd->pos = 0;
spin_lock_irq(&qpd->devp->lock);
idr_for_each(&qpd->devp->qpidr, count_idrs, &count);
spin_unlock_irq(&qpd->devp->lock);
qpd->bufsize = count * 128;
qpd->buf = kmalloc(qpd->bufsize, GFP_KERNEL);
if (!qpd->buf) {
ret = -ENOMEM;
goto err1;
}
spin_lock_irq(&qpd->devp->lock);
idr_for_each(&qpd->devp->qpidr, dump_qp, qpd);
spin_unlock_irq(&qpd->devp->lock);
qpd->buf[qpd->pos++] = 0;
file->private_data = qpd;
goto out;
err1:
kfree(qpd);
out:
return ret;
}
static const struct file_operations qp_debugfs_fops = {
.owner = THIS_MODULE,
.open = qp_open,
.release = qp_release,
.read = debugfs_read,
.llseek = default_llseek,
};
static int dump_stag(int id, void *p, void *data)
{
struct c4iw_debugfs_data *stagd = data;
int space;
int cc;
space = stagd->bufsize - stagd->pos - 1;
if (space == 0)
return 1;
cc = snprintf(stagd->buf + stagd->pos, space, "0x%x\n", id<<8);
if (cc < space)
stagd->pos += cc;
return 0;
}
static int stag_release(struct inode *inode, struct file *file)
{
struct c4iw_debugfs_data *stagd = file->private_data;
if (!stagd) {
printk(KERN_INFO "%s null stagd?\n", __func__);
return 0;
}
kfree(stagd->buf);
kfree(stagd);
return 0;
}
static int stag_open(struct inode *inode, struct file *file)
{
struct c4iw_debugfs_data *stagd;
int ret = 0;
int count = 1;
stagd = kmalloc(sizeof *stagd, GFP_KERNEL);
if (!stagd) {
ret = -ENOMEM;
goto out;
}
stagd->devp = inode->i_private;
stagd->pos = 0;
spin_lock_irq(&stagd->devp->lock);
idr_for_each(&stagd->devp->mmidr, count_idrs, &count);
spin_unlock_irq(&stagd->devp->lock);
stagd->bufsize = count * sizeof("0x12345678\n");
stagd->buf = kmalloc(stagd->bufsize, GFP_KERNEL);
if (!stagd->buf) {
ret = -ENOMEM;
goto err1;
}
spin_lock_irq(&stagd->devp->lock);
idr_for_each(&stagd->devp->mmidr, dump_stag, stagd);
spin_unlock_irq(&stagd->devp->lock);
stagd->buf[stagd->pos++] = 0;
file->private_data = stagd;
goto out;
err1:
kfree(stagd);
out:
return ret;
}
static const struct file_operations stag_debugfs_fops = {
.owner = THIS_MODULE,
.open = stag_open,
.release = stag_release,
.read = debugfs_read,
.llseek = default_llseek,
};
static int setup_debugfs(struct c4iw_dev *devp)
{
struct dentry *de;
if (!devp->debugfs_root)
return -1;
de = debugfs_create_file("qps", S_IWUSR, devp->debugfs_root,
(void *)devp, &qp_debugfs_fops);
if (de && de->d_inode)
de->d_inode->i_size = 4096;
de = debugfs_create_file("stags", S_IWUSR, devp->debugfs_root,
(void *)devp, &stag_debugfs_fops);
if (de && de->d_inode)
de->d_inode->i_size = 4096;
return 0;
}
void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev,
struct c4iw_dev_ucontext *uctx)
{
struct list_head *pos, *nxt;
struct c4iw_qid_list *entry;
mutex_lock(&uctx->lock);
list_for_each_safe(pos, nxt, &uctx->qpids) {
entry = list_entry(pos, struct c4iw_qid_list, entry);
list_del_init(&entry->entry);
if (!(entry->qid & rdev->qpmask))
c4iw_put_resource(&rdev->resource.qid_fifo, entry->qid,
&rdev->resource.qid_fifo_lock);
kfree(entry);
}
list_for_each_safe(pos, nxt, &uctx->qpids) {
entry = list_entry(pos, struct c4iw_qid_list, entry);
list_del_init(&entry->entry);
kfree(entry);
}
mutex_unlock(&uctx->lock);
}
void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev,
struct c4iw_dev_ucontext *uctx)
{
INIT_LIST_HEAD(&uctx->qpids);
INIT_LIST_HEAD(&uctx->cqids);
mutex_init(&uctx->lock);
}
/* Caller takes care of locking if needed */
static int c4iw_rdev_open(struct c4iw_rdev *rdev)
{
int err;
c4iw_init_dev_ucontext(rdev, &rdev->uctx);
/*
* qpshift is the number of bits to shift the qpid left in order
* to get the correct address of the doorbell for that qp.
*/
rdev->qpshift = PAGE_SHIFT - ilog2(rdev->lldi.udb_density);
rdev->qpmask = rdev->lldi.udb_density - 1;
rdev->cqshift = PAGE_SHIFT - ilog2(rdev->lldi.ucq_density);
rdev->cqmask = rdev->lldi.ucq_density - 1;
PDBG("%s dev %s stag start 0x%0x size 0x%0x num stags %d "
"pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x "
"qp qid start %u size %u cq qid start %u size %u\n",
__func__, pci_name(rdev->lldi.pdev), rdev->lldi.vr->stag.start,
rdev->lldi.vr->stag.size, c4iw_num_stags(rdev),
rdev->lldi.vr->pbl.start,
rdev->lldi.vr->pbl.size, rdev->lldi.vr->rq.start,
rdev->lldi.vr->rq.size,
rdev->lldi.vr->qp.start,
rdev->lldi.vr->qp.size,
rdev->lldi.vr->cq.start,
rdev->lldi.vr->cq.size);
PDBG("udb len 0x%x udb base %p db_reg %p gts_reg %p qpshift %lu "
"qpmask 0x%x cqshift %lu cqmask 0x%x\n",
(unsigned)pci_resource_len(rdev->lldi.pdev, 2),
(void *)pci_resource_start(rdev->lldi.pdev, 2),
rdev->lldi.db_reg,
rdev->lldi.gts_reg,
rdev->qpshift, rdev->qpmask,
rdev->cqshift, rdev->cqmask);
if (c4iw_num_stags(rdev) == 0) {
err = -EINVAL;
goto err1;
}
err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD);
if (err) {
printk(KERN_ERR MOD "error %d initializing resources\n", err);
goto err1;
}
err = c4iw_pblpool_create(rdev);
if (err) {
printk(KERN_ERR MOD "error %d initializing pbl pool\n", err);
goto err2;
}
err = c4iw_rqtpool_create(rdev);
if (err) {
printk(KERN_ERR MOD "error %d initializing rqt pool\n", err);
goto err3;
}
err = c4iw_ocqp_pool_create(rdev);
if (err) {
printk(KERN_ERR MOD "error %d initializing ocqp pool\n", err);
goto err4;
}
return 0;
err4:
c4iw_rqtpool_destroy(rdev);
err3:
c4iw_pblpool_destroy(rdev);
err2:
c4iw_destroy_resource(&rdev->resource);
err1:
return err;
}
static void c4iw_rdev_close(struct c4iw_rdev *rdev)
{
c4iw_pblpool_destroy(rdev);
c4iw_rqtpool_destroy(rdev);
c4iw_destroy_resource(&rdev->resource);
}
struct uld_ctx {
struct list_head entry;
struct cxgb4_lld_info lldi;
struct c4iw_dev *dev;
};
static void c4iw_remove(struct uld_ctx *ctx)
{
PDBG("%s c4iw_dev %p\n", __func__, ctx->dev);
c4iw_unregister_device(ctx->dev);
c4iw_rdev_close(&ctx->dev->rdev);
idr_destroy(&ctx->dev->cqidr);
idr_destroy(&ctx->dev->qpidr);
idr_destroy(&ctx->dev->mmidr);
iounmap(ctx->dev->rdev.oc_mw_kva);
ib_dealloc_device(&ctx->dev->ibdev);
ctx->dev = NULL;
}
static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop)
{
struct c4iw_dev *devp;
int ret;
devp = (struct c4iw_dev *)ib_alloc_device(sizeof(*devp));
if (!devp) {
printk(KERN_ERR MOD "Cannot allocate ib device\n");
return ERR_PTR(-ENOMEM);
}
devp->rdev.lldi = *infop;
devp->rdev.oc_mw_pa = pci_resource_start(devp->rdev.lldi.pdev, 2) +
(pci_resource_len(devp->rdev.lldi.pdev, 2) -
roundup_pow_of_two(devp->rdev.lldi.vr->ocq.size));
devp->rdev.oc_mw_kva = ioremap_wc(devp->rdev.oc_mw_pa,
devp->rdev.lldi.vr->ocq.size);
PDBG(KERN_INFO MOD "ocq memory: "
"hw_start 0x%x size %u mw_pa 0x%lx mw_kva %p\n",
devp->rdev.lldi.vr->ocq.start, devp->rdev.lldi.vr->ocq.size,
devp->rdev.oc_mw_pa, devp->rdev.oc_mw_kva);
ret = c4iw_rdev_open(&devp->rdev);
if (ret) {
mutex_unlock(&dev_mutex);
printk(KERN_ERR MOD "Unable to open CXIO rdev err %d\n", ret);
ib_dealloc_device(&devp->ibdev);
return ERR_PTR(ret);
}
idr_init(&devp->cqidr);
idr_init(&devp->qpidr);
idr_init(&devp->mmidr);
spin_lock_init(&devp->lock);
if (c4iw_debugfs_root) {
devp->debugfs_root = debugfs_create_dir(
pci_name(devp->rdev.lldi.pdev),
c4iw_debugfs_root);
setup_debugfs(devp);
}
return devp;
}
static void *c4iw_uld_add(const struct cxgb4_lld_info *infop)
{
struct uld_ctx *ctx;
static int vers_printed;
int i;
if (!vers_printed++)
printk(KERN_INFO MOD "Chelsio T4 RDMA Driver - version %s\n",
DRV_VERSION);
ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
if (!ctx) {
ctx = ERR_PTR(-ENOMEM);
goto out;
}
ctx->lldi = *infop;
PDBG("%s found device %s nchan %u nrxq %u ntxq %u nports %u\n",
__func__, pci_name(ctx->lldi.pdev),
ctx->lldi.nchan, ctx->lldi.nrxq,
ctx->lldi.ntxq, ctx->lldi.nports);
mutex_lock(&dev_mutex);
list_add_tail(&ctx->entry, &uld_ctx_list);
mutex_unlock(&dev_mutex);
for (i = 0; i < ctx->lldi.nrxq; i++)
PDBG("rxqid[%u] %u\n", i, ctx->lldi.rxq_ids[i]);
out:
return ctx;
}
static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp,
const struct pkt_gl *gl)
{
struct uld_ctx *ctx = handle;
struct c4iw_dev *dev = ctx->dev;
struct sk_buff *skb;
const struct cpl_act_establish *rpl;
unsigned int opcode;
if (gl == NULL) {
/* omit RSS and rsp_ctrl at end of descriptor */
unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
skb = alloc_skb(256, GFP_ATOMIC);
if (!skb)
goto nomem;
__skb_put(skb, len);
skb_copy_to_linear_data(skb, &rsp[1], len);
} else if (gl == CXGB4_MSG_AN) {
const struct rsp_ctrl *rc = (void *)rsp;
u32 qid = be32_to_cpu(rc->pldbuflen_qid);
c4iw_ev_handler(dev, qid);
return 0;
} else {
skb = cxgb4_pktgl_to_skb(gl, 128, 128);
if (unlikely(!skb))
goto nomem;
}
rpl = cplhdr(skb);
opcode = rpl->ot.opcode;
if (c4iw_handlers[opcode])
c4iw_handlers[opcode](dev, skb);
else
printk(KERN_INFO "%s no handler opcode 0x%x...\n", __func__,
opcode);
return 0;
nomem:
return -1;
}
static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state)
{
struct uld_ctx *ctx = handle;
PDBG("%s new_state %u\n", __func__, new_state);
switch (new_state) {
case CXGB4_STATE_UP:
printk(KERN_INFO MOD "%s: Up\n", pci_name(ctx->lldi.pdev));
if (!ctx->dev) {
int ret = 0;
ctx->dev = c4iw_alloc(&ctx->lldi);
if (!IS_ERR(ctx->dev))
ret = c4iw_register_device(ctx->dev);
if (IS_ERR(ctx->dev) || ret)
printk(KERN_ERR MOD
"%s: RDMA registration failed: %d\n",
pci_name(ctx->lldi.pdev), ret);
}
break;
case CXGB4_STATE_DOWN:
printk(KERN_INFO MOD "%s: Down\n",
pci_name(ctx->lldi.pdev));
if (ctx->dev)
c4iw_remove(ctx);
break;
case CXGB4_STATE_START_RECOVERY:
printk(KERN_INFO MOD "%s: Fatal Error\n",
pci_name(ctx->lldi.pdev));
if (ctx->dev) {
struct ib_event event;
ctx->dev->rdev.flags |= T4_FATAL_ERROR;
memset(&event, 0, sizeof event);
event.event = IB_EVENT_DEVICE_FATAL;
event.device = &ctx->dev->ibdev;
ib_dispatch_event(&event);
c4iw_remove(ctx);
}
break;
case CXGB4_STATE_DETACH:
printk(KERN_INFO MOD "%s: Detach\n",
pci_name(ctx->lldi.pdev));
if (ctx->dev)
c4iw_remove(ctx);
break;
}
return 0;
}
static struct cxgb4_uld_info c4iw_uld_info = {
.name = DRV_NAME,
.add = c4iw_uld_add,
.rx_handler = c4iw_uld_rx_handler,
.state_change = c4iw_uld_state_change,
};
static int __init c4iw_init_module(void)
{
int err;
err = c4iw_cm_init();
if (err)
return err;
c4iw_debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
if (!c4iw_debugfs_root)
printk(KERN_WARNING MOD
"could not create debugfs entry, continuing\n");
cxgb4_register_uld(CXGB4_ULD_RDMA, &c4iw_uld_info);
return 0;
}
static void __exit c4iw_exit_module(void)
{
struct uld_ctx *ctx, *tmp;
mutex_lock(&dev_mutex);
list_for_each_entry_safe(ctx, tmp, &uld_ctx_list, entry) {
if (ctx->dev)
c4iw_remove(ctx);
kfree(ctx);
}
mutex_unlock(&dev_mutex);
cxgb4_unregister_uld(CXGB4_ULD_RDMA);
c4iw_cm_term();
debugfs_remove_recursive(c4iw_debugfs_root);
}
module_init(c4iw_init_module);
module_exit(c4iw_exit_module);