leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

RDMA/erdma: Support dynamic mtu

Browse Source 
Hardware now support jumbo frame for RDMA. So we introduce a new CMDQ
message to support mtu change notification.

Signed-off-by: Cheng Xu <chengyou@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220909093822.33868-5-chengyou@linux.alibaba.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Cheng Xu 2022-09-09 17:38:22 +08:00 committed by Leon Romanovsky
parent a3c278807a
commit 9bdb9350f3
5 changed files with 26 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/infiniband/hw/erdma/erdma.h
View File

@ -197,6 +197,7 @@ struct erdma_dev {
struct erdma_devattr attrs;
/* physical port state (only one port per device) */
enum ib_port_state state;
u32 mtu;
/* cmdq and aeq use the same msix vector */
struct erdma_irq comm_irq;

6
drivers/infiniband/hw/erdma/erdma_hw.h
View File

@ -153,6 +153,7 @@ enum CMDQ_COMMON_OPCODE {
CMDQ_OPCODE_CREATE_EQ = 0,
CMDQ_OPCODE_DESTROY_EQ = 1,
CMDQ_OPCODE_QUERY_FW_INFO = 2,
CMDQ_OPCODE_CONF_MTU = 3,
};
/* cmdq-SQE HDR */
@ -190,6 +191,11 @@ struct erdma_cmdq_destroy_eq_req {
u8 qtype;
};
struct erdma_cmdq_config_mtu_req {
u64 hdr;
u32 mtu;
};
/* create_cq cfg0 */
#define ERDMA_CMD_CREATE_CQ_DEPTH_MASK GENMASK(31, 24)
#define ERDMA_CMD_CREATE_CQ_PAGESIZE_MASK GENMASK(23, 20)

8
drivers/infiniband/hw/erdma/erdma_main.c
View File

@ -34,10 +34,15 @@ static int erdma_netdev_event(struct notifier_block *nb, unsigned long event,
dev->state = IB_PORT_DOWN;
erdma_port_event(dev, IB_EVENT_PORT_ERR);
break;
case NETDEV_CHANGEMTU:
if (dev->mtu != netdev->mtu) {
erdma_set_mtu(dev, netdev->mtu);
dev->mtu = netdev->mtu;
}
break;
case NETDEV_REGISTER:
case NETDEV_UNREGISTER:
case NETDEV_CHANGEADDR:
case NETDEV_CHANGEMTU:
case NETDEV_GOING_DOWN:
case NETDEV_CHANGE:
default:
@ -95,6 +100,7 @@ static int erdma_device_register(struct erdma_dev *dev)
if (ret)
return ret;
dev->mtu = dev->netdev->mtu;
addrconf_addr_eui48((u8 *)&ibdev->node_guid, dev->netdev->dev_addr);
ret = ib_register_device(ibdev, "erdma_%d", &dev->pdev->dev);

11
drivers/infiniband/hw/erdma/erdma_verbs.c
View File

@ -1436,6 +1436,17 @@ err_out_xa:
return ret;
}
void erdma_set_mtu(struct erdma_dev *dev, u32 mtu)
{
struct erdma_cmdq_config_mtu_req req;
erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_COMMON,
CMDQ_OPCODE_CONF_MTU);
req.mtu = mtu;
erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), NULL, NULL);
}
void erdma_port_event(struct erdma_dev *dev, enum ib_event_type reason)
{
struct ib_event event;

1
drivers/infiniband/hw/erdma/erdma_verbs.h
View File

@ -330,5 +330,6 @@ struct ib_mr *erdma_ib_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type,
int erdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
unsigned int *sg_offset);
void erdma_port_event(struct erdma_dev *dev, enum ib_event_type reason);
void erdma_set_mtu(struct erdma_dev *dev, u32 mtu);
#endif