From: Wen Gu <guwen@linux.alibaba.com>
To: wintera@linux.ibm.com, twinkler@linux.ibm.com, hca@linux.ibm.com,
gor@linux.ibm.com, agordeev@linux.ibm.com, davem@davemloft.net,
edumazet@google.com, kuba@kernel.org, pabeni@redhat.com,
wenjia@linux.ibm.com, jaka@linux.ibm.com
Cc: borntraeger@linux.ibm.com, svens@linux.ibm.com,
alibuda@linux.alibaba.com, tonylu@linux.alibaba.com,
guwen@linux.alibaba.com, linux-kernel@vger.kernel.org,
linux-s390@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH net-next v2 04/11] net/smc: implement ID-related operations of loopback-ism
Date: Thu, 7 Mar 2024 17:55:29 +0800 [thread overview]
Message-ID: <20240307095536.29648-5-guwen@linux.alibaba.com> (raw)
In-Reply-To: <20240307095536.29648-1-guwen@linux.alibaba.com>
This implements GID and CHID related operations of loopback-ism device.
loopback-ism acts as an ISMv2. It's GID is generated randomly by UUIDv4
algorithm and CHID is reserved 0xFFFF.
Signed-off-by: Wen Gu <guwen@linux.alibaba.com>
---
net/smc/smc_loopback.c | 62 ++++++++++++++++++++++++++++++++++++++----
net/smc/smc_loopback.h | 3 ++
2 files changed, 60 insertions(+), 5 deletions(-)
diff --git a/net/smc/smc_loopback.c b/net/smc/smc_loopback.c
index e9170d86e58f..7656a2474500 100644
--- a/net/smc/smc_loopback.c
+++ b/net/smc/smc_loopback.c
@@ -19,11 +19,62 @@
#include "smc_loopback.h"
#if IS_ENABLED(CONFIG_SMC_LO)
+#define SMC_LO_V2_CAPABLE 0x1 /* loopback-ism acts as ISMv2 */
+
static const char smc_lo_dev_name[] = "loopback-ism";
static struct smc_lo_dev *lo_dev;
+static void smc_lo_generate_id(struct smc_lo_dev *ldev)
+{
+ struct smcd_gid *lgid = &ldev->local_gid;
+ uuid_t uuid;
+
+ uuid_gen(&uuid);
+ memcpy(&lgid->gid, &uuid, sizeof(lgid->gid));
+ memcpy(&lgid->gid_ext, (u8 *)&uuid + sizeof(lgid->gid),
+ sizeof(lgid->gid_ext));
+
+ ldev->chid = SMC_LO_CHID;
+}
+
+static int smc_lo_query_rgid(struct smcd_dev *smcd, struct smcd_gid *rgid,
+ u32 vid_valid, u32 vid)
+{
+ struct smc_lo_dev *ldev = smcd->priv;
+
+ /* rgid should be the same as lgid */
+ if (!ldev || rgid->gid != ldev->local_gid.gid ||
+ rgid->gid_ext != ldev->local_gid.gid_ext)
+ return -ENETUNREACH;
+ return 0;
+}
+
+static int smc_lo_supports_v2(void)
+{
+ return SMC_LO_V2_CAPABLE;
+}
+
+static void smc_lo_get_local_gid(struct smcd_dev *smcd,
+ struct smcd_gid *smcd_gid)
+{
+ struct smc_lo_dev *ldev = smcd->priv;
+
+ smcd_gid->gid = ldev->local_gid.gid;
+ smcd_gid->gid_ext = ldev->local_gid.gid_ext;
+}
+
+static u16 smc_lo_get_chid(struct smcd_dev *smcd)
+{
+ return ((struct smc_lo_dev *)smcd->priv)->chid;
+}
+
+static struct device *smc_lo_get_dev(struct smcd_dev *smcd)
+{
+ return &((struct smc_lo_dev *)smcd->priv)->dev;
+}
+
static const struct smcd_ops lo_ops = {
- .query_remote_gid = NULL,
+ .query_remote_gid = smc_lo_query_rgid,
.register_dmb = NULL,
.unregister_dmb = NULL,
.add_vlan_id = NULL,
@@ -32,10 +83,10 @@ static const struct smcd_ops lo_ops = {
.reset_vlan_required = NULL,
.signal_event = NULL,
.move_data = NULL,
- .supports_v2 = NULL,
- .get_local_gid = NULL,
- .get_chid = NULL,
- .get_dev = NULL,
+ .supports_v2 = smc_lo_supports_v2,
+ .get_local_gid = smc_lo_get_local_gid,
+ .get_chid = smc_lo_get_chid,
+ .get_dev = smc_lo_get_dev,
};
static struct smcd_dev *smcd_lo_alloc_dev(const struct smcd_ops *ops,
@@ -95,6 +146,7 @@ static void smcd_lo_unregister_dev(struct smc_lo_dev *ldev)
static int smc_lo_dev_init(struct smc_lo_dev *ldev)
{
+ smc_lo_generate_id(ldev);
return smcd_lo_register_dev(ldev);
}
diff --git a/net/smc/smc_loopback.h b/net/smc/smc_loopback.h
index 9dd44d4c0ca3..55b41133a97f 100644
--- a/net/smc/smc_loopback.h
+++ b/net/smc/smc_loopback.h
@@ -20,10 +20,13 @@
#if IS_ENABLED(CONFIG_SMC_LO)
#define SMC_LO_MAX_DMBS 5000
+#define SMC_LO_CHID 0xFFFF
struct smc_lo_dev {
struct smcd_dev *smcd;
struct device dev;
+ u16 chid;
+ struct smcd_gid local_gid;
};
#endif
--
2.32.0.3.g01195cf9f
next prev parent reply other threads:[~2024-03-07 9:55 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-07 9:55 [PATCH net-next v2 00/11] net/smc: SMC intra-OS shortcut with loopback-ism Wen Gu
2024-03-07 9:55 ` [PATCH net-next v2 01/11] net/smc: adapt SMC-D device dump for Emulated-ISM Wen Gu
2024-03-08 12:27 ` Jan Karcher
2024-03-09 6:57 ` Wen Gu
2024-03-07 9:55 ` [PATCH net-next v2 02/11] net/smc: decouple ism_client from SMC-D DMB registration Wen Gu
2024-03-07 9:55 ` [PATCH net-next v2 03/11] net/smc: introduce loopback-ism for SMC intra-OS shortcut Wen Gu
2024-03-07 9:55 ` Wen Gu [this message]
2024-03-07 9:55 ` [PATCH net-next v2 05/11] net/smc: implement some unsupported operations of loopback-ism Wen Gu
2024-03-07 9:55 ` [PATCH net-next v2 06/11] net/smc: implement DMB-related " Wen Gu
2024-03-07 9:55 ` [PATCH net-next v2 07/11] net/smc: register loopback-ism into SMC-D device list Wen Gu
2024-03-07 9:55 ` [PATCH net-next v2 08/11] net/smc: add operations to merge sndbuf with peer DMB Wen Gu
2024-03-07 9:55 ` [PATCH net-next v2 09/11] net/smc: attach or detach ghost sndbuf to " Wen Gu
2024-03-07 9:55 ` [PATCH net-next v2 10/11] net/smc: adapt cursor update when sndbuf and peer DMB are merged Wen Gu
2024-03-07 9:55 ` [PATCH net-next v2 11/11] net/smc: implement DMB-merged operations of loopback-ism Wen Gu
2024-03-12 8:06 ` Jan Karcher
2024-03-12 14:11 ` Wen Gu
2024-03-08 12:22 ` [PATCH net-next v2 00/11] net/smc: SMC intra-OS shortcut with loopback-ism Jan Karcher
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