| Message ID | 20180312174303.4333-3-rajur@chelsio.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Headers | show |
On Mon, Mar 12, 2018 at 11:13:00PM +0530, Raju Rangoju wrote: > - This patch adds srq debugfs files Please implement it with rdma restrack, it can be beneficial for all devices which are supporting SRQ. > - If hw supports an srq table, then export a debugfs file to dump the > table > > Signed-off-by: Raju Rangoju <rajur@chelsio.com> > Reviewed-by: Steve Wise <swise@opengridcomputing.com> > --- > drivers/net/ethernet/chelsio/cxgb4/Makefile | 2 +- > drivers/net/ethernet/chelsio/cxgb4/cxgb4.h | 1 + > drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c | 2 + > drivers/net/ethernet/chelsio/cxgb4/srq.c | 230 +++++++++++++++++++++ > drivers/net/ethernet/chelsio/cxgb4/srq.h | 71 +++++++ > 5 files changed, 305 insertions(+), 1 deletion(-) > create mode 100644 drivers/net/ethernet/chelsio/cxgb4/srq.c > create mode 100644 drivers/net/ethernet/chelsio/cxgb4/srq.h > > diff --git a/drivers/net/ethernet/chelsio/cxgb4/Makefile b/drivers/net/ethernet/chelsio/cxgb4/Makefile > index 53b6a02c778e..bea6a059a8f1 100644 > --- a/drivers/net/ethernet/chelsio/cxgb4/Makefile > +++ b/drivers/net/ethernet/chelsio/cxgb4/Makefile > @@ -6,7 +6,7 @@ > obj-$(CONFIG_CHELSIO_T4) += cxgb4.o > > cxgb4-objs := cxgb4_main.o l2t.o smt.o t4_hw.o sge.o clip_tbl.o cxgb4_ethtool.o \ > - cxgb4_uld.o sched.o cxgb4_filter.o cxgb4_tc_u32.o \ > + cxgb4_uld.o srq.o sched.o cxgb4_filter.o cxgb4_tc_u32.o \ > cxgb4_ptp.o cxgb4_tc_flower.o cxgb4_cudbg.o \ > cudbg_common.o cudbg_lib.o cudbg_zlib.o > cxgb4-$(CONFIG_CHELSIO_T4_DCB) += cxgb4_dcb.o > diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h > index 9040e13ce4b7..1bb30b5a92a0 100644 > --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h > +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h > @@ -946,6 +946,7 @@ struct adapter { > > /* Ethtool Dump */ > struct ethtool_dump eth_dump; > + struct srq_data *srq; > }; > > /* Support for "sched-class" command to allow a TX Scheduling Class to be > diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c > index 2822bbff73e8..e5d47aeb748b 100644 > --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c > +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c > @@ -44,6 +44,7 @@ > #include "t4fw_api.h" > #include "cxgb4_debugfs.h" > #include "clip_tbl.h" > +#include "srq.h" > #include "l2t.h" > #include "cudbg_if.h" > #include "cudbg_lib_common.h" > @@ -2999,6 +3000,7 @@ int t4_setup_debugfs(struct adapter *adap) > { "blocked_fl", &blocked_fl_fops, S_IRUSR | S_IWUSR, 0 }, > { "meminfo", &meminfo_fops, S_IRUSR, 0 }, > { "crypto", &chcr_stats_debugfs_fops, S_IRUSR, 0 }, > + { "srq", &t4_srq_debugfs_fops, S_IRUSR, 0 }, > }; > > /* Debug FS nodes common to all T5 and later adapters. > diff --git a/drivers/net/ethernet/chelsio/cxgb4/srq.c b/drivers/net/ethernet/chelsio/cxgb4/srq.c > new file mode 100644 > index 000000000000..b60158b11fbf > --- /dev/null > +++ b/drivers/net/ethernet/chelsio/cxgb4/srq.c > @@ -0,0 +1,230 @@ > +/* > + * This file is part of the Chelsio T4 Ethernet driver for Linux. > + * > + * Copyright (c) 2017-2018 Chelsio Communications, 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/skbuff.h> > +#include <linux/netdevice.h> > +#include <linux/if.h> > +#include <linux/if_vlan.h> > +#include <linux/jhash.h> > +#include <linux/proc_fs.h> > +#include <linux/seq_file.h> > +#include <net/neighbour.h> > +#include <net/addrconf.h> > +#include "cxgb4.h" > +#include "t4_msg.h" > +#include "t4_regs.h" > +#include "srq.h" > + > +struct srq_data *t4_init_srq(int srq_size) > +{ > + int i; > + struct srq_data *s; > + int size = sizeof(*s) + srq_size*sizeof(struct srq_entry); > + > + s = kzalloc(size, GFP_KERNEL | __GFP_NOWARN); > + if (!s) > + s = vzalloc(size); Just a note, there kvzalloc() especially for this. Thanks
> > On Mon, Mar 12, 2018 at 11:13:00PM +0530, Raju Rangoju wrote: > > - This patch adds srq debugfs files > > Please implement it with rdma restrack, it can be beneficial for all > devices which are supporting SRQ. > > > - If hw supports an srq table, then export a debugfs file to dump the > > table Good point. Also, I think more debugfs in cxgb4 will be NAKed by Netdev. So remove the debugfs code, and we'll have a series to dump SRQs via the 'rdma' tool. To use rdma tool, we need provider-specific attribute support added to the core restrack code. This is in-progress, and after the core support is added, we can add the cxgb4-specific stuff. > > > > Signed-off-by: Raju Rangoju <rajur@chelsio.com> > > Reviewed-by: Steve Wise <swise@opengridcomputing.com> > > --- > > drivers/net/ethernet/chelsio/cxgb4/Makefile | 2 +- > > drivers/net/ethernet/chelsio/cxgb4/cxgb4.h | 1 + > > drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c | 2 + > > drivers/net/ethernet/chelsio/cxgb4/srq.c | 230 > +++++++++++++++++++++ > > drivers/net/ethernet/chelsio/cxgb4/srq.h | 71 +++++++ > > 5 files changed, 305 insertions(+), 1 deletion(-) > > create mode 100644 drivers/net/ethernet/chelsio/cxgb4/srq.c > > create mode 100644 drivers/net/ethernet/chelsio/cxgb4/srq.h > > > > diff --git a/drivers/net/ethernet/chelsio/cxgb4/Makefile > b/drivers/net/ethernet/chelsio/cxgb4/Makefile > > index 53b6a02c778e..bea6a059a8f1 100644 > > --- a/drivers/net/ethernet/chelsio/cxgb4/Makefile > > +++ b/drivers/net/ethernet/chelsio/cxgb4/Makefile > > @@ -6,7 +6,7 @@ > > obj-$(CONFIG_CHELSIO_T4) += cxgb4.o > > > > cxgb4-objs := cxgb4_main.o l2t.o smt.o t4_hw.o sge.o clip_tbl.o > cxgb4_ethtool.o \ > > - cxgb4_uld.o sched.o cxgb4_filter.o cxgb4_tc_u32.o \ > > + cxgb4_uld.o srq.o sched.o cxgb4_filter.o cxgb4_tc_u32.o \ > > cxgb4_ptp.o cxgb4_tc_flower.o cxgb4_cudbg.o \ > > cudbg_common.o cudbg_lib.o cudbg_zlib.o > > cxgb4-$(CONFIG_CHELSIO_T4_DCB) += cxgb4_dcb.o > > diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h > b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h > > index 9040e13ce4b7..1bb30b5a92a0 100644 > > --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h > > +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h > > @@ -946,6 +946,7 @@ struct adapter { > > > > /* Ethtool Dump */ > > struct ethtool_dump eth_dump; > > + struct srq_data *srq; > > }; > > > > /* Support for "sched-class" command to allow a TX Scheduling Class to > be > > diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c > b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c > > index 2822bbff73e8..e5d47aeb748b 100644 > > --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c > > +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c > > @@ -44,6 +44,7 @@ > > #include "t4fw_api.h" > > #include "cxgb4_debugfs.h" > > #include "clip_tbl.h" > > +#include "srq.h" > > #include "l2t.h" > > #include "cudbg_if.h" > > #include "cudbg_lib_common.h" > > @@ -2999,6 +3000,7 @@ int t4_setup_debugfs(struct adapter *adap) > > { "blocked_fl", &blocked_fl_fops, S_IRUSR | S_IWUSR, 0 }, > > { "meminfo", &meminfo_fops, S_IRUSR, 0 }, > > { "crypto", &chcr_stats_debugfs_fops, S_IRUSR, 0 }, > > + { "srq", &t4_srq_debugfs_fops, S_IRUSR, 0 }, > > }; > > > > /* Debug FS nodes common to all T5 and later adapters. > > diff --git a/drivers/net/ethernet/chelsio/cxgb4/srq.c > b/drivers/net/ethernet/chelsio/cxgb4/srq.c > > new file mode 100644 > > index 000000000000..b60158b11fbf > > --- /dev/null > > +++ b/drivers/net/ethernet/chelsio/cxgb4/srq.c > > @@ -0,0 +1,230 @@ > > +/* > > + * This file is part of the Chelsio T4 Ethernet driver for Linux. > > + * > > + * Copyright (c) 2017-2018 Chelsio Communications, 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/skbuff.h> > > +#include <linux/netdevice.h> > > +#include <linux/if.h> > > +#include <linux/if_vlan.h> > > +#include <linux/jhash.h> > > +#include <linux/proc_fs.h> > > +#include <linux/seq_file.h> > > +#include <net/neighbour.h> > > +#include <net/addrconf.h> > > +#include "cxgb4.h" > > +#include "t4_msg.h" > > +#include "t4_regs.h" > > +#include "srq.h" > > + > > +struct srq_data *t4_init_srq(int srq_size) > > +{ > > + int i; > > + struct srq_data *s; > > + int size = sizeof(*s) + srq_size*sizeof(struct srq_entry); > > + > > + s = kzalloc(size, GFP_KERNEL | __GFP_NOWARN); > > + if (!s) > > + s = vzalloc(size); > > Just a note, there kvzalloc() especially for this. > > Thanks -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/net/ethernet/chelsio/cxgb4/Makefile b/drivers/net/ethernet/chelsio/cxgb4/Makefile index 53b6a02c778e..bea6a059a8f1 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/Makefile +++ b/drivers/net/ethernet/chelsio/cxgb4/Makefile @@ -6,7 +6,7 @@ obj-$(CONFIG_CHELSIO_T4) += cxgb4.o cxgb4-objs := cxgb4_main.o l2t.o smt.o t4_hw.o sge.o clip_tbl.o cxgb4_ethtool.o \ - cxgb4_uld.o sched.o cxgb4_filter.o cxgb4_tc_u32.o \ + cxgb4_uld.o srq.o sched.o cxgb4_filter.o cxgb4_tc_u32.o \ cxgb4_ptp.o cxgb4_tc_flower.o cxgb4_cudbg.o \ cudbg_common.o cudbg_lib.o cudbg_zlib.o cxgb4-$(CONFIG_CHELSIO_T4_DCB) += cxgb4_dcb.o diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h index 9040e13ce4b7..1bb30b5a92a0 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h @@ -946,6 +946,7 @@ struct adapter { /* Ethtool Dump */ struct ethtool_dump eth_dump; + struct srq_data *srq; }; /* Support for "sched-class" command to allow a TX Scheduling Class to be diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c index 2822bbff73e8..e5d47aeb748b 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c @@ -44,6 +44,7 @@ #include "t4fw_api.h" #include "cxgb4_debugfs.h" #include "clip_tbl.h" +#include "srq.h" #include "l2t.h" #include "cudbg_if.h" #include "cudbg_lib_common.h" @@ -2999,6 +3000,7 @@ int t4_setup_debugfs(struct adapter *adap) { "blocked_fl", &blocked_fl_fops, S_IRUSR | S_IWUSR, 0 }, { "meminfo", &meminfo_fops, S_IRUSR, 0 }, { "crypto", &chcr_stats_debugfs_fops, S_IRUSR, 0 }, + { "srq", &t4_srq_debugfs_fops, S_IRUSR, 0 }, }; /* Debug FS nodes common to all T5 and later adapters. diff --git a/drivers/net/ethernet/chelsio/cxgb4/srq.c b/drivers/net/ethernet/chelsio/cxgb4/srq.c new file mode 100644 index 000000000000..b60158b11fbf --- /dev/null +++ b/drivers/net/ethernet/chelsio/cxgb4/srq.c @@ -0,0 +1,230 @@ +/* + * This file is part of the Chelsio T4 Ethernet driver for Linux. + * + * Copyright (c) 2017-2018 Chelsio Communications, 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/skbuff.h> +#include <linux/netdevice.h> +#include <linux/if.h> +#include <linux/if_vlan.h> +#include <linux/jhash.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <net/neighbour.h> +#include <net/addrconf.h> +#include "cxgb4.h" +#include "t4_msg.h" +#include "t4_regs.h" +#include "srq.h" + +struct srq_data *t4_init_srq(int srq_size) +{ + int i; + struct srq_data *s; + int size = sizeof(*s) + srq_size*sizeof(struct srq_entry); + + s = kzalloc(size, GFP_KERNEL | __GFP_NOWARN); + if (!s) + s = vzalloc(size); + if (!s) + return NULL; + + s->srq_size = srq_size; + s->rpl_count = 0; + init_completion(&s->comp); + mutex_init(&s->srq_mutex); + + for (i = 0; i < s->srq_size; ++i) { + memset(&s->srqtab[i], 0, sizeof(struct srq_data)); + s->srqtab[i].idx = i; + } + return s; +} + +/* + * do_srq_read_entries: read the SRQ table + * @adap: Pointer to the adapter + * + * Send CPL_SRQ_TABLE_REQ messages for each entry. + * Contents will be returned in CPL_SRQ_TABLE_RPL messages. + * + */ +static int do_srq_read_entries(struct adapter *adap) +{ + struct cpl_srq_table_req *req; + struct sk_buff *skb; + int i; + + /* Read the srq */ + for (i = 0; i < adap->srq->srq_size; i++) { + skb = alloc_skb(sizeof(*req), GFP_KERNEL); + if (!skb) + return -ENOMEM; + req = (struct cpl_srq_table_req *) + __skb_put(skb, sizeof(*req)); + memset(req, 0, sizeof(*req)); + INIT_TP_WR(req, 0); + OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SRQ_TABLE_REQ, + TID_TID_V(i) | + TID_QID_V(adap->sge.fw_evtq.abs_id))); + req->idx = i; + + /* do_srq_table_rpl() will make it valid */ + adap->srq->srqtab[i].valid = 0; + t4_mgmt_tx(adap, skb); + } + return 0; +} + +void do_srq_table_rpl(struct adapter *adap, const struct cpl_srq_table_rpl *rpl) +{ + struct srq_data *s = adap->srq; + unsigned int idx = TID_TID_G(GET_TID(rpl)); + struct srq_entry *e; + + if (unlikely(rpl->status != CPL_CONTAINS_READ_RPL)) { + dev_err(adap->pdev_dev, + "Unexpected SRQ_TABLE_RPL status %u for entry %u\n", + rpl->status, idx); + goto out; + } + + /* Store the read entry */ + e = &s->srqtab[idx]; + e->valid = 1; + WARN_ON_ONCE(e->idx != idx); + e->pdid = SRQT_PDID_G(be64_to_cpu(rpl->rsvd_pdid)); + e->qlen = SRQT_QLEN_G(be32_to_cpu(rpl->qlen_qbase)); + e->qbase = SRQT_QBASE_G(be32_to_cpu(rpl->qlen_qbase)); + e->cur_msn = be16_to_cpu(rpl->cur_msn); + e->max_msn = be16_to_cpu(rpl->max_msn); +out: + if (++s->rpl_count == s->srq_size) + complete(&s->comp); +} + +static void *srq_get_idx(struct seq_file *seq, loff_t pos) +{ + struct adapter *adap = seq->private; + struct srq_data *s = adap->srq; + + return pos >= s->srq_size ? NULL : &s->srqtab[pos]; +} + +static void *srq_seq_start(struct seq_file *seq, loff_t *pos) +{ + return *pos ? srq_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; +} + +static void *srq_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + v = srq_get_idx(seq, *pos); + if (v) + ++*pos; + return v; +} + +static void srq_seq_stop(struct seq_file *seq, void *v) +{ +} + +static int srq_seq_show(struct seq_file *seq, void *v) +{ + if (v == SEQ_START_TOKEN) + seq_puts(seq, " Idx PDID QBASE QLEN Cur MSN Max MSN\n"); + else { + struct srq_entry *e = v; + + if (e->valid) + seq_printf(seq, "%4u %4u %8u %4u %4u %4u\n", + e->idx, e->pdid, + e->qbase, e->qlen, + e->cur_msn, e->max_msn); + else + seq_printf(seq, "-\n"); + } + return 0; +} + +static const struct seq_operations srq_seq_ops = { + .start = srq_seq_start, + .next = srq_seq_next, + .stop = srq_seq_stop, + .show = srq_seq_show +}; + +static int srq_seq_open(struct inode *inode, struct file *file) +{ + struct adapter *adap = inode->i_private; + struct srq_data *s = adap->srq; + struct seq_file *seq; + int rc = -ENODEV; + + if (!(adap->flags & FULL_INIT_DONE) || !s) + goto out; + + rc = seq_open(file, &srq_seq_ops); + if (rc) + goto out; + + seq = file->private_data; + + mutex_lock(&s->srq_mutex); + init_completion(&s->comp); + s->rpl_count = 0; + rc = do_srq_read_entries(adap); + if (rc) { + mutex_unlock(&s->srq_mutex); + goto out; + } + rc = wait_for_completion_timeout(&s->comp, SRQ_WAIT_TO); + + /* !rc means we timed out */ + if (rc) { + seq->private = adap; + rc = 0; + } else + rc = -ETIMEDOUT; + mutex_unlock(&s->srq_mutex); +out: + return rc; +} + +const struct file_operations t4_srq_debugfs_fops = { + .owner = THIS_MODULE, + .open = srq_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + diff --git a/drivers/net/ethernet/chelsio/cxgb4/srq.h b/drivers/net/ethernet/chelsio/cxgb4/srq.h new file mode 100644 index 000000000000..1b2bbd142ba7 --- /dev/null +++ b/drivers/net/ethernet/chelsio/cxgb4/srq.h @@ -0,0 +1,71 @@ +/* + * This file is part of the Chelsio T4 Ethernet driver for Linux. + * + * Copyright (c) 2017-2018 Chelsio Communications, 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. + */ + +#ifndef __CXGB4_SRQ_H +#define __CXGB4_SRQ_H + +#include <linux/spinlock.h> +#include <linux/if_ether.h> +#include <linux/completion.h> + +struct adapter; +struct file_operations; +struct cpl_srq_table_rpl; + +enum { + SRQ_WAIT_TO = (HZ * 5), +}; + +struct srq_entry { + u8 valid; + u8 idx; + u8 qlen; + u16 pdid; + u16 cur_msn; + u16 max_msn; + u32 qbase; +}; + +struct srq_data { + unsigned int srq_size; + struct completion comp; + struct mutex srq_mutex; + int rpl_count; + struct srq_entry srqtab[0]; +}; + +struct srq_data *t4_init_srq(int); +void do_srq_table_rpl(struct adapter *adap, const struct cpl_srq_table_rpl *rpl); +extern const struct file_operations t4_srq_debugfs_fops; +#endif /* __CXGB4_SRQ_H */