From bedbef8ad3e75a304af6361af235302bcc61d06b Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 14 May 2024 06:39:01 +0000
Subject: [PATCH] 修改内核路径
---
kernel/drivers/infiniband/ulp/srpt/ib_srpt.h | 121 ++++++++++++++++++++++++++++-----------
1 files changed, 86 insertions(+), 35 deletions(-)
diff --git a/kernel/drivers/infiniband/ulp/srpt/ib_srpt.h b/kernel/drivers/infiniband/ulp/srpt/ib_srpt.h
index 444dfd7..2bf381e 100644
--- a/kernel/drivers/infiniband/ulp/srpt/ib_srpt.h
+++ b/kernel/drivers/infiniband/ulp/srpt/ib_srpt.h
@@ -104,16 +104,7 @@
SRP_CMD_ORDERED_Q = 0x2,
SRP_CMD_ACA = 0x4,
- SRP_LOGIN_RSP_MULTICHAN_NO_CHAN = 0x0,
- SRP_LOGIN_RSP_MULTICHAN_TERMINATED = 0x1,
- SRP_LOGIN_RSP_MULTICHAN_MAINTAINED = 0x2,
-
SRPT_DEF_SG_TABLESIZE = 128,
- /*
- * An experimentally determined value that avoids that QP creation
- * fails due to "swiotlb buffer is full" on systems using the swiotlb.
- */
- SRPT_MAX_SG_PER_WQE = 16,
MIN_SRPT_SQ_SIZE = 16,
DEF_SRPT_SQ_SIZE = 4096,
@@ -124,11 +115,18 @@
MAX_SRPT_RDMA_SIZE = 1U << 24,
MAX_SRPT_RSP_SIZE = 1024,
+ SRP_MAX_ADD_CDB_LEN = 16,
+ SRP_MAX_IMM_DATA_OFFSET = 80,
+ SRP_MAX_IMM_DATA = 8 * 1024,
MIN_MAX_REQ_SIZE = 996,
- DEFAULT_MAX_REQ_SIZE
- = sizeof(struct srp_cmd)/*48*/
- + sizeof(struct srp_indirect_buf)/*20*/
- + 128 * sizeof(struct srp_direct_buf)/*16*/,
+ DEFAULT_MAX_REQ_SIZE_1 = sizeof(struct srp_cmd)/*48*/ +
+ SRP_MAX_ADD_CDB_LEN +
+ sizeof(struct srp_indirect_buf)/*20*/ +
+ 128 * sizeof(struct srp_direct_buf)/*16*/,
+ DEFAULT_MAX_REQ_SIZE_2 = SRP_MAX_IMM_DATA_OFFSET +
+ sizeof(struct srp_imm_buf) + SRP_MAX_IMM_DATA,
+ DEFAULT_MAX_REQ_SIZE = DEFAULT_MAX_REQ_SIZE_1 > DEFAULT_MAX_REQ_SIZE_2 ?
+ DEFAULT_MAX_REQ_SIZE_1 : DEFAULT_MAX_REQ_SIZE_2,
MIN_MAX_RSP_SIZE = sizeof(struct srp_rsp)/*36*/ + 4,
DEFAULT_MAX_RSP_SIZE = 256, /* leaves 220 bytes for sense data */
@@ -165,12 +163,14 @@
* @cqe: Completion queue element.
* @buf: Pointer to the buffer.
* @dma: DMA address of the buffer.
+ * @offset: Offset of the first byte in @buf and @dma that is actually used.
* @index: Index of the I/O context in its ioctx_ring array.
*/
struct srpt_ioctx {
struct ib_cqe cqe;
void *buf;
dma_addr_t dma;
+ uint32_t offset;
uint32_t index;
};
@@ -178,12 +178,14 @@
* struct srpt_recv_ioctx - SRPT receive I/O context
* @ioctx: See above.
* @wait_list: Node for insertion in srpt_rdma_ch.cmd_wait_list.
+ * @byte_len: Number of bytes in @ioctx.buf.
*/
struct srpt_recv_ioctx {
struct srpt_ioctx ioctx;
struct list_head wait_list;
+ int byte_len;
};
-
+
struct srpt_rw_ctx {
struct rdma_rw_ctx rw;
struct scatterlist *sg;
@@ -194,10 +196,12 @@
* struct srpt_send_ioctx - SRPT send I/O context
* @ioctx: See above.
* @ch: Channel pointer.
+ * @recv_ioctx: Receive I/O context associated with this send I/O context.
+ * Only used for processing immediate data.
* @s_rw_ctx: @rw_ctxs points here if only a single rw_ctx is needed.
* @rw_ctxs: RDMA read/write contexts.
+ * @imm_sg: Scatterlist for immediate data.
* @rdma_cqe: RDMA completion queue element.
- * @free_list: Node in srpt_rdma_ch.free_list.
* @state: I/O context state.
* @cmd: Target core command data structure.
* @sense_data: SCSI sense data.
@@ -209,12 +213,14 @@
struct srpt_send_ioctx {
struct srpt_ioctx ioctx;
struct srpt_rdma_ch *ch;
+ struct srpt_recv_ioctx *recv_ioctx;
struct srpt_rw_ctx s_rw_ctx;
struct srpt_rw_ctx *rw_ctxs;
+ struct scatterlist imm_sg;
+
struct ib_cqe rdma_cqe;
- struct list_head free_list;
enum srpt_command_state state;
struct se_cmd cmd;
u8 n_rdma;
@@ -245,11 +251,17 @@
* struct srpt_rdma_ch - RDMA channel
* @nexus: I_T nexus this channel is associated with.
* @qp: IB queue pair used for communicating over this channel.
- * @cm_id: IB CM ID associated with the channel.
+ * @ib_cm: See below.
+ * @ib_cm.cm_id: IB CM ID associated with the channel.
+ * @rdma_cm: See below.
+ * @rdma_cm.cm_id: RDMA CM ID associated with the channel.
* @cq: IB completion queue for this channel.
+ * @cq_size: Number of CQEs in @cq.
* @zw_cqe: Zero-length write CQE.
* @rcu: RCU head.
* @kref: kref for this channel.
+ * @closed: Completion object that will be signaled as soon as a new
+ * channel object with the same identity can be created.
* @rq_size: IB receive queue size.
* @max_rsp_size: Maximum size of an RSP response message in bytes.
* @sq_wr_avail: number of work requests available in the send queue.
@@ -259,12 +271,14 @@
* @req_lim: request limit: maximum number of requests that may be sent
* by the initiator without having received a response.
* @req_lim_delta: Number of credits not yet sent back to the initiator.
+ * @imm_data_offset: Offset from start of SRP_CMD for immediate data.
* @spinlock: Protects free_list and state.
- * @free_list: Head of list with free send I/O contexts.
* @state: channel state. See also enum rdma_ch_state.
* @using_rdma_cm: Whether the RDMA/CM or IB/CM is used for this channel.
* @processing_wait_list: Whether or not cmd_wait_list is being processed.
+ * @rsp_buf_cache: kmem_cache for @ioctx_ring.
* @ioctx_ring: Send ring.
+ * @req_buf_cache: kmem_cache for @ioctx_recv_ring.
* @ioctx_recv_ring: Receive I/O context ring.
* @list: Node in srpt_nexus.ch_list.
* @cmd_wait_list: List of SCSI commands that arrived before the RTU event. This
@@ -287,9 +301,11 @@
} rdma_cm;
};
struct ib_cq *cq;
+ u32 cq_size;
struct ib_cqe zw_cqe;
struct rcu_head rcu;
struct kref kref;
+ struct completion *closed;
int rq_size;
u32 max_rsp_size;
atomic_t sq_wr_avail;
@@ -297,10 +313,12 @@
int max_ti_iu_len;
atomic_t req_lim;
atomic_t req_lim_delta;
+ u16 imm_data_offset;
spinlock_t spinlock;
- struct list_head free_list;
enum rdma_ch_state state;
+ struct kmem_cache *rsp_buf_cache;
struct srpt_send_ioctx **ioctx_ring;
+ struct kmem_cache *req_buf_cache;
struct srpt_recv_ioctx **ioctx_recv_ring;
struct list_head list;
struct list_head cmd_wait_list;
@@ -343,24 +361,54 @@
};
/**
- * struct srpt_port - information associated by SRPT with a single IB port
+ * struct srpt_tpg - information about a single "target portal group"
+ * @entry: Entry in @sport_id->tpg_list.
+ * @sport_id: Port name this TPG is associated with.
+ * @tpg: LIO TPG data structure.
+ *
+ * Zero or more target portal groups are associated with each port name
+ * (srpt_port_id). With each TPG an ACL list is associated.
+ */
+struct srpt_tpg {
+ struct list_head entry;
+ struct srpt_port_id *sport_id;
+ struct se_portal_group tpg;
+};
+
+/**
+ * struct srpt_port_id - LIO RDMA port information
+ * @mutex: Protects @tpg_list changes.
+ * @tpg_list: TPGs associated with the RDMA port name.
+ * @wwn: WWN associated with the RDMA port name.
+ * @name: ASCII representation of the port name.
+ *
+ * Multiple sysfs directories can be associated with a single RDMA port. This
+ * data structure represents a single (port, name) pair.
+ */
+struct srpt_port_id {
+ struct mutex mutex;
+ struct list_head tpg_list;
+ struct se_wwn wwn;
+ char name[64];
+};
+
+/**
+ * struct srpt_port - SRPT RDMA port information
* @sdev: backpointer to the HCA information.
* @mad_agent: per-port management datagram processing information.
* @enabled: Whether or not this target port is enabled.
- * @port_guid: ASCII representation of Port GUID
- * @port_gid: ASCII representation of Port GID
* @port: one-based port number.
* @sm_lid: cached value of the port's sm_lid.
* @lid: cached value of the port's lid.
* @gid: cached value of the port's gid.
- * @port_acl_lock spinlock for port_acl_list:
* @work: work structure for refreshing the aforementioned cached values.
- * @port_guid_tpg: TPG associated with target port GUID.
- * @port_guid_wwn: WWN associated with target port GUID.
- * @port_gid_tpg: TPG associated with target port GID.
- * @port_gid_wwn: WWN associated with target port GID.
+ * @guid_name: port name in GUID format.
+ * @guid_id: LIO target port information for the port name in GUID format.
+ * @gid_name: port name in GID format.
+ * @gid_id: LIO target port information for the port name in GID format.
* @port_attrib: Port attributes that can be accessed through configfs.
- * @ch_releaseQ: Enables waiting for removal from nexus_list.
+ * @refcount: Number of objects associated with this port.
+ * @freed_channels: Completion that will be signaled once @refcount becomes 0.
* @mutex: Protects nexus_list.
* @nexus_list: Nexus list. See also srpt_nexus.entry.
*/
@@ -368,25 +416,25 @@
struct srpt_device *sdev;
struct ib_mad_agent *mad_agent;
bool enabled;
- u8 port_guid[24];
- u8 port_gid[64];
u8 port;
u32 sm_lid;
u32 lid;
union ib_gid gid;
struct work_struct work;
- struct se_portal_group port_guid_tpg;
- struct se_wwn port_guid_wwn;
- struct se_portal_group port_gid_tpg;
- struct se_wwn port_gid_wwn;
+ char guid_name[64];
+ struct srpt_port_id *guid_id;
+ char gid_name[64];
+ struct srpt_port_id *gid_id;
struct srpt_port_attrib port_attrib;
- wait_queue_head_t ch_releaseQ;
+ atomic_t refcount;
+ struct completion *freed_channels;
struct mutex mutex;
struct list_head nexus_list;
};
/**
* struct srpt_device - information associated by SRPT with a single HCA
+ * @refcnt: Reference count for this device.
* @device: Backpointer to the struct ib_device managed by the IB core.
* @pd: IB protection domain.
* @lkey: L_Key (local key) with write access to all local memory.
@@ -395,12 +443,14 @@
* @srq_size: SRQ size.
* @sdev_mutex: Serializes use_srq changes.
* @use_srq: Whether or not to use SRQ.
+ * @req_buf_cache: kmem_cache for @ioctx_ring buffers.
* @ioctx_ring: Per-HCA SRQ.
* @event_handler: Per-HCA asynchronous IB event handler.
* @list: Node in srpt_dev_list.
* @port: Information about the ports owned by this HCA.
*/
struct srpt_device {
+ struct kref refcnt;
struct ib_device *device;
struct ib_pd *pd;
u32 lkey;
@@ -409,6 +459,7 @@
int srq_size;
struct mutex sdev_mutex;
bool use_srq;
+ struct kmem_cache *req_buf_cache;
struct srpt_recv_ioctx **ioctx_ring;
struct ib_event_handler event_handler;
struct list_head list;
--
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