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authorLinus Torvalds <torvalds@linux-foundation.org>2010-03-03 07:33:17 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-03 07:33:17 -0800
commit3ff1562ea48cddaa5ac1adcb8892227389a4c96c (patch)
tree927f885b02579402859f339db707a0a76470aa51 /drivers/infiniband/ulp
parent88b68033b99b16b42e734ab56a4ed6bc1d53516a (diff)
parentfe8875e5a41a36ef26072cf05731df5493ade0e1 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (48 commits) IB/srp: Clean up error path in srp_create_target_ib() IB/srp: Split send and recieve CQs to reduce number of interrupts RDMA/nes: Add support for KR device id 0x0110 IB/uverbs: Use anon_inodes instead of private infinibandeventfs IB/core: Fix and clean up ib_ud_header_init() RDMA/cxgb3: Mark RDMA device with CXIO_ERROR_FATAL when removing RDMA/cxgb3: Don't allocate the SW queue for user mode CQs RDMA/cxgb3: Increase the max CQ depth RDMA/cxgb3: Doorbell overflow avoidance and recovery IB/core: Pack struct ib_device a little tighter IB/ucm: Clean whitespace errors IB/ucm: Increase maximum devices supported IB/ucm: Use stack variable 'base' in ib_ucm_add_one IB/ucm: Use stack variable 'devnum' in ib_ucm_add_one IB/umad: Clean whitespace IB/umad: Increase maximum devices supported IB/umad: Use stack variable 'base' in ib_umad_init_port IB/umad: Use stack variable 'devnum' in ib_umad_init_port IB/umad: Remove port_table[] IB/umad: Convert *cdev to cdev in struct ib_umad_port ...
Diffstat (limited to 'drivers/infiniband/ulp')
-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib_ethtool.c10
-rw-r--r--drivers/infiniband/ulp/iser/iscsi_iser.c47
-rw-r--r--drivers/infiniband/ulp/iser/iscsi_iser.h97
-rw-r--r--drivers/infiniband/ulp/iser/iser_initiator.c506
-rw-r--r--drivers/infiniband/ulp/iser/iser_memory.c64
-rw-r--r--drivers/infiniband/ulp/iser/iser_verbs.c281
-rw-r--r--drivers/infiniband/ulp/srp/ib_srp.c91
-rw-r--r--drivers/infiniband/ulp/srp/ib_srp.h6
8 files changed, 458 insertions, 644 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ethtool.c b/drivers/infiniband/ulp/ipoib/ipoib_ethtool.c
index e9795f60e5d..d10b4ec68d2 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_ethtool.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_ethtool.c
@@ -55,9 +55,7 @@ static int ipoib_get_coalesce(struct net_device *dev,
struct ipoib_dev_priv *priv = netdev_priv(dev);
coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
- coal->tx_coalesce_usecs = priv->ethtool.coalesce_usecs;
coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
- coal->tx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
return 0;
}
@@ -69,10 +67,8 @@ static int ipoib_set_coalesce(struct net_device *dev,
int ret;
/*
- * Since IPoIB uses a single CQ for both rx and tx, we assume
- * that rx params dictate the configuration. These values are
- * saved in the private data and returned when ipoib_get_coalesce()
- * is called.
+ * These values are saved in the private data and returned
+ * when ipoib_get_coalesce() is called
*/
if (coal->rx_coalesce_usecs > 0xffff ||
coal->rx_max_coalesced_frames > 0xffff)
@@ -85,8 +81,6 @@ static int ipoib_set_coalesce(struct net_device *dev,
return ret;
}
- coal->tx_coalesce_usecs = coal->rx_coalesce_usecs;
- coal->tx_max_coalesced_frames = coal->rx_max_coalesced_frames;
priv->ethtool.coalesce_usecs = coal->rx_coalesce_usecs;
priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index 5f7a6fca0a4..71237f8f78f 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -128,6 +128,28 @@ static int iscsi_iser_pdu_alloc(struct iscsi_task *task, uint8_t opcode)
return 0;
}
+int iser_initialize_task_headers(struct iscsi_task *task,
+ struct iser_tx_desc *tx_desc)
+{
+ struct iscsi_iser_conn *iser_conn = task->conn->dd_data;
+ struct iser_device *device = iser_conn->ib_conn->device;
+ struct iscsi_iser_task *iser_task = task->dd_data;
+ u64 dma_addr;
+
+ dma_addr = ib_dma_map_single(device->ib_device, (void *)tx_desc,
+ ISER_HEADERS_LEN, DMA_TO_DEVICE);
+ if (ib_dma_mapping_error(device->ib_device, dma_addr))
+ return -ENOMEM;
+
+ tx_desc->dma_addr = dma_addr;
+ tx_desc->tx_sg[0].addr = tx_desc->dma_addr;
+ tx_desc->tx_sg[0].length = ISER_HEADERS_LEN;
+ tx_desc->tx_sg[0].lkey = device->mr->lkey;
+
+ iser_task->headers_initialized = 1;
+ iser_task->iser_conn = iser_conn;
+ return 0;
+}
/**
* iscsi_iser_task_init - Initialize task
* @task: iscsi task
@@ -137,17 +159,17 @@ static int iscsi_iser_pdu_alloc(struct iscsi_task *task, uint8_t opcode)
static int
iscsi_iser_task_init(struct iscsi_task *task)
{
- struct iscsi_iser_conn *iser_conn = task->conn->dd_data;
struct iscsi_iser_task *iser_task = task->dd_data;
+ if (!iser_task->headers_initialized)
+ if (iser_initialize_task_headers(task, &iser_task->desc))
+ return -ENOMEM;
+
/* mgmt task */
- if (!task->sc) {
- iser_task->desc.data = task->data;
+ if (!task->sc)
return 0;
- }
iser_task->command_sent = 0;
- iser_task->iser_conn = iser_conn;
iser_task_rdma_init(iser_task);
return 0;
}
@@ -168,7 +190,7 @@ iscsi_iser_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
{
int error = 0;
- iser_dbg("task deq [cid %d itt 0x%x]\n", conn->id, task->itt);
+ iser_dbg("mtask xmit [cid %d itt 0x%x]\n", conn->id, task->itt);
error = iser_send_control(conn, task);
@@ -178,9 +200,6 @@ iscsi_iser_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
* - if yes, the task is recycled at iscsi_complete_pdu
* - if no, the task is recycled at iser_snd_completion
*/
- if (error && error != -ENOBUFS)
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
-
return error;
}
@@ -232,7 +251,7 @@ iscsi_iser_task_xmit(struct iscsi_task *task)
task->imm_count, task->unsol_r2t.data_length);
}
- iser_dbg("task deq [cid %d itt 0x%x]\n",
+ iser_dbg("ctask xmit [cid %d itt 0x%x]\n",
conn->id, task->itt);
/* Send the cmd PDU */
@@ -248,8 +267,6 @@ iscsi_iser_task_xmit(struct iscsi_task *task)
error = iscsi_iser_task_xmit_unsol_data(conn, task);
iscsi_iser_task_xmit_exit:
- if (error && error != -ENOBUFS)
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
return error;
}
@@ -283,7 +300,7 @@ iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
* due to issues with the login code re iser sematics
* this not set in iscsi_conn_setup - FIXME
*/
- conn->max_recv_dlength = 128;
+ conn->max_recv_dlength = ISER_RECV_DATA_SEG_LEN;
iser_conn = conn->dd_data;
conn->dd_data = iser_conn;
@@ -401,7 +418,7 @@ iscsi_iser_session_create(struct iscsi_endpoint *ep,
struct Scsi_Host *shost;
struct iser_conn *ib_conn;
- shost = iscsi_host_alloc(&iscsi_iser_sht, 0, 1);
+ shost = iscsi_host_alloc(&iscsi_iser_sht, 0, 0);
if (!shost)
return NULL;
shost->transportt = iscsi_iser_scsi_transport;
@@ -675,7 +692,7 @@ static int __init iser_init(void)
memset(&ig, 0, sizeof(struct iser_global));
ig.desc_cache = kmem_cache_create("iser_descriptors",
- sizeof (struct iser_desc),
+ sizeof(struct iser_tx_desc),
0, SLAB_HWCACHE_ALIGN,
NULL);
if (ig.desc_cache == NULL)
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h
index 9d529cae1f0..036934cdcb9 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.h
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -102,9 +102,9 @@
#define ISER_MAX_TX_MISC_PDUS 6 /* NOOP_OUT(2), TEXT(1), *
* SCSI_TMFUNC(2), LOGOUT(1) */
-#define ISER_QP_MAX_RECV_DTOS (ISCSI_DEF_XMIT_CMDS_MAX + \
- ISER_MAX_RX_MISC_PDUS + \
- ISER_MAX_TX_MISC_PDUS)
+#define ISER_QP_MAX_RECV_DTOS (ISCSI_DEF_XMIT_CMDS_MAX)
+
+#define ISER_MIN_POSTED_RX (ISCSI_DEF_XMIT_CMDS_MAX >> 2)
/* the max TX (send) WR supported by the iSER QP is defined by *
* max_send_wr = T * (1 + D) + C ; D is how many inflight dataouts we expect *
@@ -132,6 +132,12 @@ struct iser_hdr {
__be64 read_va;
} __attribute__((packed));
+/* Constant PDU lengths calculations */
+#define ISER_HEADERS_LEN (sizeof(struct iser_hdr) + sizeof(struct iscsi_hdr))
+
+#define ISER_RECV_DATA_SEG_LEN 128
+#define ISER_RX_PAYLOAD_SIZE (ISER_HEADERS_LEN + ISER_RECV_DATA_SEG_LEN)
+#define ISER_RX_LOGIN_SIZE (ISER_HEADERS_LEN + ISCSI_DEF_MAX_RECV_SEG_LEN)
/* Length of an object name string */
#define ISER_OBJECT_NAME_SIZE 64
@@ -187,51 +193,43 @@ struct iser_regd_buf {
struct iser_mem_reg reg; /* memory registration info */
void *virt_addr;
struct iser_device *device; /* device->device for dma_unmap */
- u64 dma_addr; /* if non zero, addr for dma_unmap */
enum dma_data_direction direction; /* direction for dma_unmap */
unsigned int data_size;
- atomic_t ref_count; /* refcount, freed when dec to 0 */
-};
-
-#define MAX_REGD_BUF_VECTOR_LEN 2
-
-struct iser_dto {
- struct iscsi_iser_task *task;
- struct iser_conn *ib_conn;
- int notify_enable;
-
- /* vector of registered buffers */
- unsigned int regd_vector_len;
- struct iser_regd_buf *regd[MAX_REGD_BUF_VECTOR_LEN];
-
- /* offset into the registered buffer may be specified */
- unsigned int offset[MAX_REGD_BUF_VECTOR_LEN];
-
- /* a smaller size may be specified, if 0, then full size is used */
- unsigned int used_sz[MAX_REGD_BUF_VECTOR_LEN];
};
enum iser_desc_type {
- ISCSI_RX,
ISCSI_TX_CONTROL ,
ISCSI_TX_SCSI_COMMAND,
ISCSI_TX_DATAOUT
};
-struct iser_desc {
+struct iser_tx_desc {
struct iser_hdr iser_header;
struct iscsi_hdr iscsi_header;
- struct iser_regd_buf hdr_regd_buf;
- void *data; /* used by RX & TX_CONTROL */
- struct iser_regd_buf data_regd_buf; /* used by RX & TX_CONTROL */
enum iser_desc_type type;
- struct iser_dto dto;
+ u64 dma_addr;
+ /* sg[0] points to iser/iscsi headers, sg[1] optionally points to either
+ of immediate data, unsolicited data-out or control (login,text) */
+ struct ib_sge tx_sg[2];
+ int num_sge;
};
+#define ISER_RX_PAD_SIZE (256 - (ISER_RX_PAYLOAD_SIZE + \
+ sizeof(u64) + sizeof(struct ib_sge)))
+struct iser_rx_desc {
+ struct iser_hdr iser_header;
+ struct iscsi_hdr iscsi_header;
+ char data[ISER_RECV_DATA_SEG_LEN];
+ u64 dma_addr;
+ struct ib_sge rx_sg;
+ char pad[ISER_RX_PAD_SIZE];
+} __attribute__((packed));
+
struct iser_device {
struct ib_device *ib_device;
struct ib_pd *pd;
- struct ib_cq *cq;
+ struct ib_cq *rx_cq;
+ struct ib_cq *tx_cq;
struct ib_mr *mr;
struct tasklet_struct cq_tasklet;
struct list_head ig_list; /* entry in ig devices list */
@@ -250,15 +248,18 @@ struct iser_conn {
struct ib_fmr_pool *fmr_pool; /* pool of IB FMRs */
int disc_evt_flag; /* disconn event delivered */
wait_queue_head_t wait; /* waitq for conn/disconn */
- atomic_t post_recv_buf_count; /* posted rx count */
+ int post_recv_buf_count; /* posted rx count */
atomic_t post_send_buf_count; /* posted tx count */
- atomic_t unexpected_pdu_count;/* count of received *
- * unexpected pdus *
- * not yet retired */
char name[ISER_OBJECT_NAME_SIZE];
struct iser_page_vec *page_vec; /* represents SG to fmr maps*
* maps serialized as tx is*/
struct list_head conn_list; /* entry in ig conn list */
+
+ char *login_buf;
+ u64 login_dma;
+ unsigned int rx_desc_head;
+ struct iser_rx_desc *rx_descs;
+ struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX];
};
struct iscsi_iser_conn {
@@ -267,7 +268,7 @@ struct iscsi_iser_conn {
};
struct iscsi_iser_task {
- struct iser_desc desc;
+ struct iser_tx_desc desc;
struct iscsi_iser_conn *iser_conn;
enum iser_task_status status;
int command_sent; /* set if command sent */
@@ -275,6 +276,7 @@ struct iscsi_iser_task {
struct iser_regd_buf rdma_regd[ISER_DIRS_NUM];/* regd rdma buf */
struct iser_data_buf data[ISER_DIRS_NUM]; /* orig. data des*/
struct iser_data_buf data_copy[ISER_DIRS_NUM];/* contig. copy */
+ int headers_initialized;
};
struct iser_page_vec {
@@ -322,22 +324,17 @@ void iser_conn_put(struct iser_conn *ib_conn);
void iser_conn_terminate(struct iser_conn *ib_conn);
-void iser_rcv_completion(struct iser_desc *desc,
- unsigned long dto_xfer_len);
+void iser_rcv_completion(struct iser_rx_desc *desc,
+ unsigned long dto_xfer_len,
+ struct iser_conn *ib_conn);
-void iser_snd_completion(struct iser_desc *desc);
+void iser_snd_completion(struct iser_tx_desc *desc, struct iser_conn *ib_conn);
void iser_task_rdma_init(struct iscsi_iser_task *task);
void iser_task_rdma_finalize(struct iscsi_iser_task *task);
-void iser_dto_buffs_release(struct iser_dto *dto);
-
-int iser_regd_buff_release(struct iser_regd_buf *regd_buf);
-
-void iser_reg_single(struct iser_device *device,
- struct iser_regd_buf *regd_buf,
- enum dma_data_direction direction);
+void iser_free_rx_descriptors(struct iser_conn *ib_conn);
void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *task,
enum iser_data_dir cmd_dir);
@@ -356,11 +353,9 @@ int iser_reg_page_vec(struct iser_conn *ib_conn,
void iser_unreg_mem(struct iser_mem_reg *mem_reg);
-int iser_post_recv(struct iser_desc *rx_desc);
-int iser_post_send(struct iser_desc *tx_desc);
-
-int iser_conn_state_comp(struct iser_conn *ib_conn,
- enum iser_ib_conn_state comp);
+int iser_post_recvl(struct iser_conn *ib_conn);
+int iser_post_recvm(struct iser_conn *ib_conn, int count);
+int iser_post_send(struct iser_conn *ib_conn, struct iser_tx_desc *tx_desc);
int iser_dma_map_task_data(struct iscsi_iser_task *iser_task,
struct iser_data_buf *data,
@@ -368,4 +363,6 @@ int iser_dma_map_task_data(struct iscsi_iser_task *iser_task,
enum dma_data_direction dma_dir);
void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task);
+int iser_initialize_task_headers(struct iscsi_task *task,
+ struct iser_tx_desc *tx_desc);
#endif
diff --git a/drivers/infiniband/ulp/iser/iser_initiator.c b/drivers/infiniband/ulp/iser/iser_initiator.c
index 9de640200ad..0b9ef071658 100644
--- a/drivers/infiniband/ulp/iser/iser_initiator.c
+++ b/drivers/infiniband/ulp/iser/iser_initiator.c
@@ -39,29 +39,6 @@
#include "iscsi_iser.h"
-/* Constant PDU lengths calculations */
-#define ISER_TOTAL_HEADERS_LEN (sizeof (struct iser_hdr) + \
- sizeof (struct iscsi_hdr))
-
-/* iser_dto_add_regd_buff - increments the reference count for *
- * the registered buffer & adds it to the DTO object */
-static void iser_dto_add_regd_buff(struct iser_dto *dto,
- struct iser_regd_buf *regd_buf,
- unsigned long use_offset,
- unsigned long use_size)
-{
- int add_idx;
-
- atomic_inc(&regd_buf->ref_count);
-
- add_idx = dto->regd_vector_len;
- dto->regd[add_idx] = regd_buf;
- dto->used_sz[add_idx] = use_size;
- dto->offset[add_idx] = use_offset;
-
- dto->regd_vector_len++;
-}
-
/* Register user buffer memory and initialize passive rdma
* dto descriptor. Total data size is stored in
* iser_task->data[ISER_DIR_IN].data_len
@@ -122,9 +99,9 @@ iser_prepare_write_cmd(struct iscsi_task *task,
struct iscsi_iser_task *iser_task = task->dd_data;
struct iser_regd_buf *regd_buf;
int err;
- struct iser_dto *send_dto = &iser_task->desc.dto;
struct iser_hdr *hdr = &iser_task->desc.iser_header;
struct iser_data_buf *buf_out = &iser_task->data[ISER_DIR_OUT];
+ struct ib_sge *tx_dsg = &iser_task->desc.tx_sg[1];
err = iser_dma_map_task_data(iser_task,
buf_out,
@@ -163,135 +140,100 @@ iser_prepare_write_cmd(struct iscsi_task *task,
if (imm_sz > 0) {
iser_dbg("Cmd itt:%d, WRITE, adding imm.data sz: %d\n",
task->itt, imm_sz);
- iser_dto_add_regd_buff(send_dto,
- regd_buf,
- 0,
- imm_sz);
+ tx_dsg->addr = regd_buf->reg.va;
+ tx_dsg->length = imm_sz;
+ tx_dsg->lkey = regd_buf->reg.lkey;
+ iser_task->desc.num_sge = 2;
}
return 0;
}
-/**
- * iser_post_receive_control - allocates, initializes and posts receive DTO.
- */
-static int iser_post_receive_control(struct iscsi_conn *conn)
+/* creates a new tx descriptor and adds header regd buffer */
+static void iser_create_send_desc(struct iser_conn *ib_conn,
+ struct iser_tx_desc *tx_desc)
{
- struct iscsi_iser_conn *iser_conn = conn->dd_data;
- struct iser_desc *rx_desc;
- struct iser_regd_buf *regd_hdr;
- struct iser_regd_buf *regd_data;
- struct iser_dto *recv_dto = NULL;
- struct iser_device *device = iser_conn->ib_conn->device;
- int rx_data_size, err;
- int posts, outstanding_unexp_pdus;
-
- /* for the login sequence we must support rx of upto 8K; login is done
- * after conn create/bind (connect) and conn stop/bind (reconnect),
- * what's common for both schemes is that the connection is not started
- */
- if (conn->c_stage != ISCSI_CONN_STARTED)
- rx_data_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
- else /* FIXME till user space sets conn->max_recv_dlength correctly */
- rx_data_size = 128;
-
- outstanding_unexp_pdus =
- atomic_xchg(&iser_conn->ib_conn->unexpected_pdu_count, 0);
-
- /*
- * in addition to the response buffer, replace those consumed by
- * unexpected pdus.
- */
- for (posts = 0; posts < 1 + outstanding_unexp_pdus; posts++) {
- rx_desc = kmem_cache_alloc(ig.desc_cache, GFP_NOIO);
- if (rx_desc == NULL) {
- iser_err("Failed to alloc desc for post recv %d\n",
- posts);
- err = -ENOMEM;
- goto post_rx_cache_alloc_failure;
- }
- rx_desc->type = ISCSI_RX;
- rx_desc->data = kmalloc(rx_data_size, GFP_NOIO);
- if (rx_desc->data == NULL) {
- iser_err("Failed to alloc data buf for post recv %d\n",
- posts);
- err = -ENOMEM;
- goto post_rx_kmalloc_failure;
- }
-
- recv_dto = &rx_desc->dto;
- recv_dto->ib_conn = iser_conn->ib_conn;
- recv_dto->regd_vector_len = 0;
+ struct iser_device *device = ib_conn->device;
- regd_hdr = &rx_desc->hdr_regd_buf;
- memset(regd_hdr, 0, sizeof(struct iser_regd_buf));
- regd_hdr->device = device;
- regd_hdr->virt_addr = rx_desc; /* == &rx_desc->iser_header */
- regd_hdr->data_size = ISER_TOTAL_HEADERS_LEN;
+ ib_dma_sync_single_for_cpu(device->ib_device,
+ tx_desc->dma_addr, ISER_HEADERS_LEN, DMA_TO_DEVICE);
- iser_reg_single(device, regd_hdr, DMA_FROM_DEVICE);
-
- iser_dto_add_regd_buff(recv_dto, regd_hdr, 0, 0);
+ memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr));
+ tx_desc->iser_header.flags = ISER_VER;
- regd_data = &rx_desc->data_regd_buf;
- memset(regd_data, 0, sizeof(struct iser_regd_buf));
- regd_data->device = device;
- regd_data->virt_addr = rx_desc->data;
- regd_data->data_size = rx_data_size;
+ tx_desc->num_sge = 1;
- iser_reg_single(device, regd_data, DMA_FROM_DEVICE);
+ if (tx_desc->tx_sg[0].lkey != device->mr->lkey) {
+ tx_desc->tx_sg[0].lkey = device->mr->lkey;
+ iser_dbg("sdesc %p lkey mismatch, fixing\n", tx_desc);
+ }
+}
- iser_dto_add_regd_buff(recv_dto, regd_data, 0, 0);
- err = iser_post_recv(rx_desc);
- if (err) {
- iser_err("Failed iser_post_recv for post %d\n", posts);
- goto post_rx_post_recv_failure;
- }
+int iser_alloc_rx_descriptors(struct iser_conn *ib_conn)
+{
+ int i, j;
+ u64 dma_addr;
+ struct iser_rx_desc *rx_desc;
+ struct ib_sge *rx_sg;
+ struct iser_device *device = ib_conn->device;
+
+ ib_conn->rx_descs = kmalloc(ISER_QP_MAX_RECV_DTOS *
+ sizeof(struct iser_rx_desc), GFP_KERNEL);
+ if (!ib_conn->rx_descs)
+ goto rx_desc_alloc_fail;
+
+ rx_desc = ib_conn->rx_descs;
+
+ for (i = 0; i < ISER_QP_MAX_RECV_DTOS; i++, rx_desc++) {
+ dma_addr = ib_dma_map_single(device->ib_device, (void *)rx_desc,
+ ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
+ if (ib_dma_mapping_error(device->ib_device, dma_addr))
+ goto rx_desc_dma_map_failed;
+
+ rx_desc->dma_addr = dma_addr;
+
+ rx_sg = &rx_desc->rx_sg;
+ rx_sg->addr = rx_desc->dma_addr;
+ rx_sg->length = ISER_RX_PAYLOAD_SIZE;
+ rx_sg->lkey = device->mr->lkey;
}
- /* all posts successful */
- return 0;
-post_rx_post_recv_failure:
- iser_dto_buffs_release(recv_dto);
- kfree(rx_desc->data);
-post_rx_kmalloc_failure:
- kmem_cache_free(ig.desc_cache, rx_desc);
-post_rx_cache_alloc_failure:
- if (posts > 0) {
- /*
- * response buffer posted, but did not replace all unexpected
- * pdu recv bufs. Ignore error, retry occurs next send
- */
- outstanding_unexp_pdus -= (posts - 1);
- err = 0;
- }
- atomic_add(outstanding_unexp_pdus,
- &iser_conn->ib_conn->unexpected_pdu_count);
+ ib_conn->rx_desc_head = 0;
+ return 0;
- return err;
+rx_desc_dma_map_failed:
+ rx_desc = ib_conn->rx_descs;
+ for (j = 0; j < i; j++, rx_desc++)
+ ib_dma_unmap_single(device->ib_device, rx_desc->dma_addr,
+ ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
+ kfree(ib_conn->rx_descs);
+ ib_conn->rx_descs = NULL;
+rx_desc_alloc_fail:
+ iser_err("failed allocating rx descriptors / data buffers\n");
+ return -ENOMEM;
}
-/* creates a new tx descriptor and adds header regd buffer */
-static void iser_create_send_desc(struct iscsi_iser_conn *iser_conn,
- struct iser_desc *tx_desc)
+void iser_free_rx_descriptors(struct iser_conn *ib_conn)
{
- struct iser_regd_buf *regd_hdr = &tx_desc->hdr_regd_buf;
- struct iser_dto *send_dto = &tx_desc->dto;
+ int i;
+ struct iser_rx_desc *rx_desc;
+ struct iser_device *device = ib_conn->device;
- memset(regd_hdr, 0, sizeof(struct iser_regd_buf));
- regd_hdr->device = iser_conn->ib_conn->device;
- regd_hdr->virt_addr = tx_desc; /* == &tx_desc->iser_header */
- regd_hdr->data_size = ISER_TOTAL_HEADERS_LEN;
+ if (ib_conn->login_buf) {
+ ib_dma_unmap_single(device->ib_device, ib_conn->login_dma,
+ ISER_RX_LOGIN_SIZE, DMA_FROM_DEVICE);
+ kfree(ib_conn->login_buf);
+ }
- send_dto->ib_conn = iser_conn->ib_conn;
- send_dto->notify_enable = 1;
- send_dto->regd_vector_len = 0;
+ if (!ib_conn->rx_descs)
+ return;
- memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr));
- tx_desc->iser_header.flags = ISER_VER;
-
- iser_dto_add_regd_buff(send_dto, regd_hdr, 0, 0);
+ rx_desc = ib_conn->rx_descs;
+ for (i = 0; i < ISER_QP_MAX_RECV_DTOS; i++, rx_desc++)
+ ib_dma_unmap_single(device->ib_device, rx_desc->dma_addr,
+ ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
+ kfree(ib_conn->rx_descs);
}
/**
@@ -301,46 +243,23 @@ int iser_conn_set_full_featured_mode(struct iscsi_conn *conn)
{
struct iscsi_iser_conn *iser_conn = conn->dd_data;
- int i;
- /*
- * FIXME this value should be declared to the target during login with
- * the MaxOutstandingUnexpectedPDUs key when supported
- */
- int initial_post_recv_bufs_num = ISER_MAX_RX_MISC_PDUS;
-
- iser_dbg("Initially post: %d\n", initial_post_recv_bufs_num);
+ iser_dbg("Initially post: %d\n", ISER_MIN_POSTED_RX);
/* Check that there is no posted recv or send buffers left - */
/* they must be consumed during the login phase */
- BUG_ON(atomic_read(&iser_conn->ib_conn->post_recv_buf_count) != 0);
+ BUG_ON(iser_conn->ib_conn->post_recv_buf_count != 0);
BUG_ON(atomic_read(&iser_conn->ib_conn->post_send_buf_count) != 0);
- /* Initial post receive buffers */
- for (i = 0; i < initial_post_recv_bufs_num; i++) {
- if (iser_post_receive_control(conn) != 0) {
- iser_err("Failed to post recv bufs at:%d conn:0x%p\n",
- i, conn);
- return -ENOMEM;
- }
- }
- iser_dbg("Posted %d post recv bufs, conn:0x%p\n", i, conn);
- return 0;
-}
+ if (iser_alloc_rx_descriptors(iser_conn->ib_conn))
+ return -ENOMEM;
-static int
-iser_check_xmit(struct iscsi_conn *conn, void *task)
-{
- struct iscsi_iser_conn *iser_conn = conn->dd_data;
+ /* Initial post receive buffers */
+ if (iser_post_recvm(iser_conn->ib_conn, ISER_MIN_POSTED_RX))
+ return -ENOMEM;
- if (atomic_read(&iser_conn->ib_conn->post_send_buf_count) ==
- ISER_QP_MAX_REQ_DTOS) {
- iser_dbg("%ld can't xmit task %p\n",jiffies,task);
- return -ENOBUFS;
- }
return 0;
}
-
/**
* iser_send_command - send command PDU
*/
@@ -349,27 +268,18 @@ int iser_send_command(struct iscsi_conn *conn,
{
struct iscsi_iser_conn *iser_conn = conn->dd_data;
struct iscsi_iser_task *iser_task = task->dd_data;
- struct iser_dto *send_dto = NULL;
unsigned long edtl;
- int err = 0;
+ int err;
struct iser_data_buf *data_buf;
struct iscsi_cmd *hdr = (struct iscsi_cmd *)task->hdr;
struct scsi_cmnd *sc = task->sc;
-
- if (!iser_conn_state_comp(iser_conn->ib_conn, ISER_CONN_UP)) {
- iser_err("Failed to send, conn: 0x%p is not up\n", iser_conn->ib_conn);
- return -EPERM;
- }
- if (iser_check_xmit(conn, task))
- return -ENOBUFS;
+ struct iser_tx_desc *tx_desc = &iser_task->desc;
edtl = ntohl(hdr->data_length);
/* build the tx desc regd header and add it to the tx desc dto */
- iser_task->desc.type = ISCSI_TX_SCSI_COMMAND;
- send_dto = &iser_task->desc.dto;
- send_dto->task = iser_task;
- iser_create_send_desc(iser_conn, &iser_task->desc);
+ tx_desc->type = ISCSI_TX_SCSI_COMMAND;
+ iser_create_send_desc(iser_conn->ib_conn, tx_desc);
if (hdr->flags & ISCSI_FLAG_CMD_READ)
data_buf = &iser_task->data[ISER_DIR_IN];
@@ -398,23 +308,13 @@ int iser_send_command(struct iscsi_conn *conn,
goto send_command_error;
}
- iser_reg_single(iser_conn->ib_conn->device,
- send_dto->regd[0], DMA_TO_DEVICE);
-
- if (iser_post_receive_control(conn) != 0) {
- iser_err("post_recv failed!\n");
- err = -ENOMEM;
- goto send_command_error;
- }
-
iser_task->status = ISER_TASK_STATUS_STARTED;
- err = iser_post_send(&iser_task->desc);
+ err = iser_post_send(iser_conn->ib_conn, tx_desc);
if (!err)
return 0;
send_command_error:
- iser_dto_buffs_release(send_dto);
iser_err("conn %p failed task->itt %d err %d\n",conn, task->itt, err);
return err;
}
@@ -428,20 +328,13 @@ int iser_send_data_out(struct iscsi_conn *conn,
{
struct iscsi_iser_conn *iser_conn = conn->dd_data;
struct iscsi_iser_task *iser_task = task->dd_data;
- struct iser_desc *tx_desc = NULL;
- struct iser_dto *send_dto = NULL;
+ struct iser_tx_desc *tx_desc = NULL;
+ struct iser_regd_buf *regd_buf;
unsigned long buf_offset;
unsigned long data_seg_len;
uint32_t itt;
int err = 0;
-
- if (!iser_conn_state_comp(iser_conn->ib_conn, ISER_CONN_UP)) {
- iser_err("Failed to send, conn: 0x%p is not up\n", iser_conn->ib_conn);
- return -EPERM;
- }
-
- if (iser_check_xmit(conn, task))
- return -ENOBUFS;
+ struct ib_sge *tx_dsg;
itt = (__force uint32_t)hdr->itt;
data_seg_len = ntoh24(hdr->dlength);
@@ -450,28 +343,25 @@ int iser_send_data_out(struct iscsi_conn *conn,
iser_dbg("%s itt %d dseg_len %d offset %d\n",
__func__,(int)itt,(int)data_seg_len,(int)buf_offset);
- tx_desc = kmem_cache_alloc(ig.desc_cache, GFP_NOIO);
+ tx_desc = kmem_cache_zalloc(ig.desc_cache, GFP_ATOMIC);
if (tx_desc == NULL) {
iser_err("Failed to alloc desc for post dataout\n");
return -ENOMEM;
}
tx_desc->type = ISCSI_TX_DATAOUT;
+ tx_desc->iser_header.flags = ISER_VER;
memcpy(&tx_desc->iscsi_header, hdr, sizeof(struct iscsi_hdr));
- /* build the tx desc regd header and add it to the tx desc dto */
- send_dto = &tx_desc->dto;
- send_dto->task = iser_task;
- iser_create_send_desc(iser_conn, tx_desc);
-
- iser_reg_single(iser_conn->ib_conn->device,
- send_dto->regd[0], DMA_TO_DEVICE);
+ /* build the tx desc */
+ iser_initialize_task_headers(task, tx_desc);
- /* all data was registered for RDMA, we can use the lkey */
- iser_dto_add_regd_buff(send_dto,
- &iser_task->rdma_regd[ISER_DIR_OUT],
- buf_offset,
- data_seg_len);
+ regd_buf = &iser_task->rdma_regd[ISER_DIR_OUT];
+ tx_dsg = &tx_desc->tx_sg[1];
+ tx_dsg->addr = regd_buf->reg.va + buf_offset;
+ tx_dsg->length = data_seg_len;
+ tx_dsg->lkey = regd_buf->reg.lkey;
+ tx_desc->num_sge = 2;
if (buf_offset + data_seg_len > iser_task->data[ISER_DIR_OUT].data_len) {
iser_err("Offset:%ld & DSL:%ld in Data-Out "
@@ -485,12 +375,11 @@ int iser_send_data_out(struct iscsi_conn *conn,
itt, buf_offset, data_seg_len);
- err = iser_post_send(tx_desc);
+ err = iser_post_send(iser_conn->ib_conn, tx_desc);
if (!err)
return 0;
send_data_out_error:
- iser_dto_buffs_release(send_dto);
kmem_cache_free(ig.desc_cache, tx_desc);
iser_err("conn %p failed err %d\n",conn, err);
return err;
@@ -501,64 +390,44 @@ int iser_send_control(struct iscsi_conn *conn,
{
struct iscsi_iser_conn *iser_conn = conn->dd_data;
struct iscsi_iser_task *iser_task = task->dd_data;
- struct iser_desc *mdesc = &iser_task->desc;
- struct iser_dto *send_dto = NULL;
+ struct iser_tx_desc *mdesc = &iser_task->desc;
unsigned long data_seg_len;
int err = 0;
- struct iser_regd_buf *regd_buf;
struct iser_device *device;
- unsigned char opcode;
-
- if (!iser_conn_state_comp(iser_conn->ib_conn, ISER_CONN_UP)) {
- iser_err("Failed to send, conn: 0x%p is not up\n", iser_conn->ib_conn);
- return -EPERM;
- }
-
- if (iser_check_xmit(conn, task))
- return -ENOBUFS;
/* build the tx desc regd header and add it to the tx desc dto */
mdesc->type = ISCSI_TX_CONTROL;
- send_dto = &mdesc->dto;
- send_dto->task = NULL;
- iser_create_send_desc(iser_conn, mdesc);
+ iser_create_send_desc(iser_conn->ib_conn, mdesc);
device = iser_conn->ib_conn->device;
- iser_reg_single(device, send_dto->regd[0], DMA_TO_DEVICE);
-
data_seg_len = ntoh24(task->hdr->dlength);
if (data_seg_len > 0) {
- regd_buf = &mdesc->data_regd_buf;
- memset(regd_buf, 0, sizeof(struct iser_regd_buf));
- regd_buf->device = device;
- regd_buf->virt_addr = task->data;
- regd_buf->data_size = task->data_count;
- iser_reg_single(device, regd_buf,
- DMA_TO_DEVICE);
- iser_dto_add_regd_buff(send_dto, regd_buf,
- 0,
- data_seg_len);
+ struct ib_sge *tx_dsg = &mdesc->tx_sg[1];
+ if (task != conn->login_task) {
+ iser_err("data present on non login task!!!\n");
+ goto send_control_error;
+ }
+ memcpy(iser_conn->ib_conn->login_buf, task->data,
+ task->data_count);
+ tx_dsg->addr = iser_conn->ib_conn->login_dma;
+ tx_dsg->length = data_seg_len;
+ tx_dsg->lkey = device->mr->lkey;
+ mdesc->num_sge = 2;
}
- opcode = task->hdr->opcode & ISCSI_OPCODE_MASK;
-
- /* post recv buffer for response if one is expected */
- if (!(opcode == ISCSI_OP_NOOP_OUT && task->hdr->itt == RESERVED_ITT)) {
- if (iser_post_receive_control(conn) != 0) {
- iser_err("post_rcv_buff failed!\n");
- err = -ENOMEM;
+ if (task == conn->login_task) {
+ err = iser_post_recvl(iser_conn->ib_conn);
+ if (err)
goto send_control_error;
- }
}
- err = iser_post_send(mdesc);
+ err = iser_post_send(iser_conn->ib_conn, mdesc);
if (!err)
return 0;
send_control_error:
- iser_dto_buffs_release(send_dto);
iser_err("conn %p failed err %d\n",conn, err);
return err;
}
@@ -566,104 +435,71 @@ send_control_error:
/**
* iser_rcv_dto_completion - recv DTO completion
*/
-void iser_rcv_completion(struct iser_desc *rx_desc,
- unsigned long dto_xfer_len)
+void iser_rcv_completion(struct iser_rx_desc *rx_desc,
+ unsigned long rx_xfer_len,
+ struct iser_conn *ib_conn)
{
- struct iser_dto *dto = &rx_desc->dto;
- struct iscsi_iser_conn *conn = dto->ib_conn->iser_conn;
- struct iscsi_task *task;
- struct iscsi_iser_task *iser_task;
+ struct iscsi_iser_conn *conn = ib_conn->iser_conn;
struct iscsi_hdr *hdr;
- char *rx_data = NULL;
- int rx_data_len = 0;
- unsigned char opcode;
-
- hdr = &rx_desc->iscsi_header;
+ u64 rx_dma;
+ int rx_buflen, outstanding, count, err;
+
+ /* differentiate between login to all other PDUs */
+ if ((char *)rx_desc == ib_conn->login_buf) {
+ rx_dma = ib_conn->login_dma;
+ rx_buflen = ISER_RX_LOGIN_SIZE;
+ } else {
+ rx_dma = rx_desc->dma_addr;
+ rx_buflen = ISER_RX_PAYLOAD_SIZE;
+ }
- iser_dbg("op 0x%x itt 0x%x\n", hdr->opcode,hdr->itt);
+ ib_dma_sync_single_for_cpu(ib_conn->device->ib_device, rx_dma,
+ rx_buflen, DMA_FROM_DEVICE);
- if (dto_xfer_len > ISER_TOTAL_HEADERS_LEN) { /* we have data */
- rx_data_len = dto_xfer_len - ISER_TOTAL_HEADERS_LEN;
- rx_data = dto->regd[1]->virt_addr;
- rx_data += dto->offset[1];
- }
+ hdr = &rx_desc->iscsi_header;
- opcode = hdr->opcode & ISCSI_OPCODE_MASK;
-
- if (opcode == ISCSI_OP_SCSI_CMD_RSP) {
- spin_lock(&conn->iscsi_conn->session->lock);
- task = iscsi_itt_to_ctask(conn->iscsi_conn, hdr->itt);
- if (task)
- __iscsi_get_task(task);
- spin_unlock(&conn->iscsi_conn->session->lock);
-
- if (!task)
- iser_err("itt can't be matched to task!!! "
- "conn %p opcode %d itt %d\n",
- conn->iscsi_conn, opcode, hdr->itt);
- else {
- iser_task = task->dd_data;
- iser_dbg("itt %d task %p\n",hdr->itt, task);
- iser_task->status = ISER_TASK_STATUS_COMPLETED;
- iser_task_rdma_finalize(iser_task);