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-rw-r--r--drivers/scsi/cxgb3i/cxgb3i.h21
-rw-r--r--drivers/scsi/cxgb3i/cxgb3i_ddp.c19
-rw-r--r--drivers/scsi/cxgb3i/cxgb3i_ddp.h5
-rw-r--r--drivers/scsi/cxgb3i/cxgb3i_init.c4
-rw-r--r--drivers/scsi/cxgb3i/cxgb3i_iscsi.c22
-rw-r--r--drivers/scsi/cxgb3i/cxgb3i_offload.c146
-rw-r--r--drivers/scsi/cxgb3i/cxgb3i_offload.h29
-rw-r--r--drivers/scsi/cxgb3i/cxgb3i_pdu.c275
-rw-r--r--drivers/scsi/cxgb3i/cxgb3i_pdu.h2
9 files changed, 354 insertions, 169 deletions
diff --git a/drivers/scsi/cxgb3i/cxgb3i.h b/drivers/scsi/cxgb3i/cxgb3i.h
index fde6e4c634e..a7cf550b9cc 100644
--- a/drivers/scsi/cxgb3i/cxgb3i.h
+++ b/drivers/scsi/cxgb3i/cxgb3i.h
@@ -20,6 +20,7 @@
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/scatterlist.h>
+#include <linux/skbuff.h>
#include <scsi/libiscsi_tcp.h>
/* from cxgb3 LLD */
@@ -113,6 +114,26 @@ struct cxgb3i_endpoint {
struct cxgb3i_conn *cconn;
};
+/**
+ * struct cxgb3i_task_data - private iscsi task data
+ *
+ * @nr_frags: # of coalesced page frags (from scsi sgl)
+ * @frags: coalesced page frags (from scsi sgl)
+ * @skb: tx pdu skb
+ * @offset: data offset for the next pdu
+ * @count: max. possible pdu payload
+ * @sgoffset: offset to the first sg entry for a given offset
+ */
+#define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512)
+struct cxgb3i_task_data {
+ unsigned short nr_frags;
+ skb_frag_t frags[MAX_PDU_FRAGS];
+ struct sk_buff *skb;
+ unsigned int offset;
+ unsigned int count;
+ unsigned int sgoffset;
+};
+
int cxgb3i_iscsi_init(void);
void cxgb3i_iscsi_cleanup(void);
diff --git a/drivers/scsi/cxgb3i/cxgb3i_ddp.c b/drivers/scsi/cxgb3i/cxgb3i_ddp.c
index 08f3a09d923..a83d36e4926 100644
--- a/drivers/scsi/cxgb3i/cxgb3i_ddp.c
+++ b/drivers/scsi/cxgb3i/cxgb3i_ddp.c
@@ -639,10 +639,11 @@ static int ddp_init(struct t3cdev *tdev)
write_unlock(&cxgb3i_ddp_rwlock);
ddp_log_info("nppods %u (0x%x ~ 0x%x), bits %u, mask 0x%x,0x%x "
- "pkt %u,%u.\n",
+ "pkt %u/%u, %u/%u.\n",
ppmax, ddp->llimit, ddp->ulimit, ddp->idx_bits,
ddp->idx_mask, ddp->rsvd_tag_mask,
- ddp->max_txsz, ddp->max_rxsz);
+ ddp->max_txsz, uinfo.max_txsz,
+ ddp->max_rxsz, uinfo.max_rxsz);
return 0;
free_ddp_map:
@@ -654,8 +655,8 @@ free_ddp_map:
* cxgb3i_adapter_ddp_init - initialize the adapter's ddp resource
* @tdev: t3cdev adapter
* @tformat: tag format
- * @txsz: max tx pkt size, filled in by this func.
- * @rxsz: max rx pkt size, filled in by this func.
+ * @txsz: max tx pdu payload size, filled in by this func.
+ * @rxsz: max rx pdu payload size, filled in by this func.
* initialize the ddp pagepod manager for a given adapter if needed and
* setup the tag format for a given iscsi entity
*/
@@ -685,10 +686,12 @@ int cxgb3i_adapter_ddp_init(struct t3cdev *tdev,
tformat->sw_bits, tformat->rsvd_bits,
tformat->rsvd_shift, tformat->rsvd_mask);
- *txsz = ddp->max_txsz;
- *rxsz = ddp->max_rxsz;
- ddp_log_info("ddp max pkt size: %u, %u.\n",
- ddp->max_txsz, ddp->max_rxsz);
+ *txsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
+ ddp->max_txsz - ISCSI_PDU_NONPAYLOAD_LEN);
+ *rxsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
+ ddp->max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN);
+ ddp_log_info("max payload size: %u/%u, %u/%u.\n",
+ *txsz, ddp->max_txsz, *rxsz, ddp->max_rxsz);
return 0;
}
EXPORT_SYMBOL_GPL(cxgb3i_adapter_ddp_init);
diff --git a/drivers/scsi/cxgb3i/cxgb3i_ddp.h b/drivers/scsi/cxgb3i/cxgb3i_ddp.h
index 5c7c4d95c49..3faae7831c8 100644
--- a/drivers/scsi/cxgb3i/cxgb3i_ddp.h
+++ b/drivers/scsi/cxgb3i/cxgb3i_ddp.h
@@ -13,6 +13,8 @@
#ifndef __CXGB3I_ULP2_DDP_H__
#define __CXGB3I_ULP2_DDP_H__
+#include <linux/vmalloc.h>
+
/**
* struct cxgb3i_tag_format - cxgb3i ulp tag format for an iscsi entity
*
@@ -85,8 +87,9 @@ struct cxgb3i_ddp_info {
struct sk_buff **gl_skb;
};
+#define ISCSI_PDU_NONPAYLOAD_LEN 312 /* bhs(48) + ahs(256) + digest(8) */
#define ULP2_MAX_PKT_SIZE 16224
-#define ULP2_MAX_PDU_PAYLOAD (ULP2_MAX_PKT_SIZE - ISCSI_PDU_NONPAYLOAD_MAX)
+#define ULP2_MAX_PDU_PAYLOAD (ULP2_MAX_PKT_SIZE - ISCSI_PDU_NONPAYLOAD_LEN)
#define PPOD_PAGES_MAX 4
#define PPOD_PAGES_SHIFT 2 /* 4 pages per pod */
diff --git a/drivers/scsi/cxgb3i/cxgb3i_init.c b/drivers/scsi/cxgb3i/cxgb3i_init.c
index 091ecb4d9f3..1ce9f244e46 100644
--- a/drivers/scsi/cxgb3i/cxgb3i_init.c
+++ b/drivers/scsi/cxgb3i/cxgb3i_init.c
@@ -12,8 +12,8 @@
#include "cxgb3i.h"
#define DRV_MODULE_NAME "cxgb3i"
-#define DRV_MODULE_VERSION "1.0.0"
-#define DRV_MODULE_RELDATE "Jun. 1, 2008"
+#define DRV_MODULE_VERSION "1.0.1"
+#define DRV_MODULE_RELDATE "Jan. 2009"
static char version[] =
"Chelsio S3xx iSCSI Driver " DRV_MODULE_NAME
diff --git a/drivers/scsi/cxgb3i/cxgb3i_iscsi.c b/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
index d83464b9b3f..fa2a44f37b3 100644
--- a/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
+++ b/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
@@ -364,7 +364,8 @@ cxgb3i_session_create(struct iscsi_endpoint *ep, u16 cmds_max, u16 qdepth,
cls_session = iscsi_session_setup(&cxgb3i_iscsi_transport, shost,
cmds_max,
- sizeof(struct iscsi_tcp_task),
+ sizeof(struct iscsi_tcp_task) +
+ sizeof(struct cxgb3i_task_data),
initial_cmdsn, ISCSI_MAX_TARGET);
if (!cls_session)
return NULL;
@@ -402,17 +403,15 @@ static inline int cxgb3i_conn_max_xmit_dlength(struct iscsi_conn *conn)
{
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct cxgb3i_conn *cconn = tcp_conn->dd_data;
- unsigned int max = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
- cconn->hba->snic->tx_max_size -
- ISCSI_PDU_NONPAYLOAD_MAX);
+ unsigned int max = max(512 * MAX_SKB_FRAGS, SKB_TX_HEADROOM);
+ max = min(cconn->hba->snic->tx_max_size, max);
if (conn->max_xmit_dlength)
- conn->max_xmit_dlength = min_t(unsigned int,
- conn->max_xmit_dlength, max);
+ conn->max_xmit_dlength = min(conn->max_xmit_dlength, max);
else
conn->max_xmit_dlength = max;
align_pdu_size(conn->max_xmit_dlength);
- cxgb3i_log_info("conn 0x%p, max xmit %u.\n",
+ cxgb3i_api_debug("conn 0x%p, max xmit %u.\n",
conn, conn->max_xmit_dlength);
return 0;
}
@@ -427,9 +426,7 @@ static inline int cxgb3i_conn_max_recv_dlength(struct iscsi_conn *conn)
{
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct cxgb3i_conn *cconn = tcp_conn->dd_data;
- unsigned int max = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
- cconn->hba->snic->rx_max_size -
- ISCSI_PDU_NONPAYLOAD_MAX);
+ unsigned int max = cconn->hba->snic->rx_max_size;
align_pdu_size(max);
if (conn->max_recv_dlength) {
@@ -439,8 +436,7 @@ static inline int cxgb3i_conn_max_recv_dlength(struct iscsi_conn *conn)
conn->max_recv_dlength, max);
return -EINVAL;
}
- conn->max_recv_dlength = min_t(unsigned int,
- conn->max_recv_dlength, max);
+ conn->max_recv_dlength = min(conn->max_recv_dlength, max);
align_pdu_size(conn->max_recv_dlength);
} else
conn->max_recv_dlength = max;
@@ -844,7 +840,7 @@ static struct scsi_host_template cxgb3i_host_template = {
.proc_name = "cxgb3i",
.queuecommand = iscsi_queuecommand,
.change_queue_depth = iscsi_change_queue_depth,
- .can_queue = 128 * (ISCSI_DEF_XMIT_CMDS_MAX - 1),
+ .can_queue = CXGB3I_SCSI_QDEPTH_DFLT - 1,
.sg_tablesize = SG_ALL,
.max_sectors = 0xFFFF,
.cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
diff --git a/drivers/scsi/cxgb3i/cxgb3i_offload.c b/drivers/scsi/cxgb3i/cxgb3i_offload.c
index a865f1fefe8..de3b3b614cc 100644
--- a/drivers/scsi/cxgb3i/cxgb3i_offload.c
+++ b/drivers/scsi/cxgb3i/cxgb3i_offload.c
@@ -23,19 +23,19 @@
#include "cxgb3i_ddp.h"
#ifdef __DEBUG_C3CN_CONN__
-#define c3cn_conn_debug cxgb3i_log_info
+#define c3cn_conn_debug cxgb3i_log_debug
#else
#define c3cn_conn_debug(fmt...)
#endif
#ifdef __DEBUG_C3CN_TX__
-#define c3cn_tx_debug cxgb3i_log_debug
+#define c3cn_tx_debug cxgb3i_log_debug
#else
#define c3cn_tx_debug(fmt...)
#endif
#ifdef __DEBUG_C3CN_RX__
-#define c3cn_rx_debug cxgb3i_log_debug
+#define c3cn_rx_debug cxgb3i_log_debug
#else
#define c3cn_rx_debug(fmt...)
#endif
@@ -47,9 +47,9 @@ static int cxgb3_rcv_win = 256 * 1024;
module_param(cxgb3_rcv_win, int, 0644);
MODULE_PARM_DESC(cxgb3_rcv_win, "TCP receive window in bytes (default=256KB)");
-static int cxgb3_snd_win = 64 * 1024;
+static int cxgb3_snd_win = 128 * 1024;
module_param(cxgb3_snd_win, int, 0644);
-MODULE_PARM_DESC(cxgb3_snd_win, "TCP send window in bytes (default=64KB)");
+MODULE_PARM_DESC(cxgb3_snd_win, "TCP send window in bytes (default=128KB)");
static int cxgb3_rx_credit_thres = 10 * 1024;
module_param(cxgb3_rx_credit_thres, int, 0644);
@@ -301,8 +301,8 @@ static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
static void skb_entail(struct s3_conn *c3cn, struct sk_buff *skb,
int flags)
{
- CXGB3_SKB_CB(skb)->seq = c3cn->write_seq;
- CXGB3_SKB_CB(skb)->flags = flags;
+ skb_tcp_seq(skb) = c3cn->write_seq;
+ skb_flags(skb) = flags;
__skb_queue_tail(&c3cn->write_queue, skb);
}
@@ -457,12 +457,9 @@ static unsigned int wrlen __read_mostly;
* The number of WRs needed for an skb depends on the number of fragments
* in the skb and whether it has any payload in its main body. This maps the
* length of the gather list represented by an skb into the # of necessary WRs.
- *
- * The max. length of an skb is controlled by the max pdu size which is ~16K.
- * Also, assume the min. fragment length is the sector size (512), then add
- * extra fragment counts for iscsi bhs and payload padding.
+ * The extra two fragments are for iscsi bhs and payload padding.
*/
-#define SKB_WR_LIST_SIZE (16384/512 + 3)
+#define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2)
static unsigned int skb_wrs[SKB_WR_LIST_SIZE] __read_mostly;
static void s3_init_wr_tab(unsigned int wr_len)
@@ -485,7 +482,7 @@ static void s3_init_wr_tab(unsigned int wr_len)
static inline void reset_wr_list(struct s3_conn *c3cn)
{
- c3cn->wr_pending_head = NULL;
+ c3cn->wr_pending_head = c3cn->wr_pending_tail = NULL;
}
/*
@@ -496,7 +493,7 @@ static inline void reset_wr_list(struct s3_conn *c3cn)
static inline void enqueue_wr(struct s3_conn *c3cn,
struct sk_buff *skb)
{
- skb_wr_data(skb) = NULL;
+ skb_tx_wr_next(skb) = NULL;
/*
* We want to take an extra reference since both us and the driver
@@ -509,10 +506,22 @@ static inline void enqueue_wr(struct s3_conn *c3cn,
if (!c3cn->wr_pending_head)
c3cn->wr_pending_head = skb;
else
- skb_wr_data(skb) = skb;
+ skb_tx_wr_next(c3cn->wr_pending_tail) = skb;
c3cn->wr_pending_tail = skb;
}
+static int count_pending_wrs(struct s3_conn *c3cn)
+{
+ int n = 0;
+ const struct sk_buff *skb = c3cn->wr_pending_head;
+
+ while (skb) {
+ n += skb->csum;
+ skb = skb_tx_wr_next(skb);
+ }
+ return n;
+}
+
static inline struct sk_buff *peek_wr(const struct s3_conn *c3cn)
{
return c3cn->wr_pending_head;
@@ -529,8 +538,8 @@ static inline struct sk_buff *dequeue_wr(struct s3_conn *c3cn)
if (likely(skb)) {
/* Don't bother clearing the tail */
- c3cn->wr_pending_head = skb_wr_data(skb);
- skb_wr_data(skb) = NULL;
+ c3cn->wr_pending_head = skb_tx_wr_next(skb);
+ skb_tx_wr_next(skb) = NULL;
}
return skb;
}
@@ -543,13 +552,14 @@ static void purge_wr_queue(struct s3_conn *c3cn)
}
static inline void make_tx_data_wr(struct s3_conn *c3cn, struct sk_buff *skb,
- int len)
+ int len, int req_completion)
{
struct tx_data_wr *req;
skb_reset_transport_header(skb);
req = (struct tx_data_wr *)__skb_push(skb, sizeof(*req));
- req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA));
+ req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA) |
+ (req_completion ? F_WR_COMPL : 0));
req->wr_lo = htonl(V_WR_TID(c3cn->tid));
req->sndseq = htonl(c3cn->snd_nxt);
/* len includes the length of any HW ULP additions */
@@ -592,7 +602,7 @@ static int c3cn_push_tx_frames(struct s3_conn *c3cn, int req_completion)
if (unlikely(c3cn->state == C3CN_STATE_CONNECTING ||
c3cn->state == C3CN_STATE_CLOSE_WAIT_1 ||
- c3cn->state == C3CN_STATE_ABORTING)) {
+ c3cn->state >= C3CN_STATE_ABORTING)) {
c3cn_tx_debug("c3cn 0x%p, in closing state %u.\n",
c3cn, c3cn->state);
return 0;
@@ -615,7 +625,7 @@ static int c3cn_push_tx_frames(struct s3_conn *c3cn, int req_completion)
if (c3cn->wr_avail < wrs_needed) {
c3cn_tx_debug("c3cn 0x%p, skb len %u/%u, frag %u, "
"wr %d < %u.\n",
- c3cn, skb->len, skb->datalen, frags,
+ c3cn, skb->len, skb->data_len, frags,
wrs_needed, c3cn->wr_avail);
break;
}
@@ -627,20 +637,24 @@ static int c3cn_push_tx_frames(struct s3_conn *c3cn, int req_completion)
c3cn->wr_unacked += wrs_needed;
enqueue_wr(c3cn, skb);
- if (likely(CXGB3_SKB_CB(skb)->flags & C3CB_FLAG_NEED_HDR)) {
- len += ulp_extra_len(skb);
- make_tx_data_wr(c3cn, skb, len);
- c3cn->snd_nxt += len;
- if ((req_completion
- && c3cn->wr_unacked == wrs_needed)
- || (CXGB3_SKB_CB(skb)->flags & C3CB_FLAG_COMPL)
- || c3cn->wr_unacked >= c3cn->wr_max / 2) {
- struct work_request_hdr *wr = cplhdr(skb);
+ c3cn_tx_debug("c3cn 0x%p, enqueue, skb len %u/%u, frag %u, "
+ "wr %d, left %u, unack %u.\n",
+ c3cn, skb->len, skb->data_len, frags,
+ wrs_needed, c3cn->wr_avail, c3cn->wr_unacked);
+
- wr->wr_hi |= htonl(F_WR_COMPL);
+ if (likely(skb_flags(skb) & C3CB_FLAG_NEED_HDR)) {
+ if ((req_completion &&
+ c3cn->wr_unacked == wrs_needed) ||
+ (skb_flags(skb) & C3CB_FLAG_COMPL) ||
+ c3cn->wr_unacked >= c3cn->wr_max / 2) {
+ req_completion = 1;
c3cn->wr_unacked = 0;
}
- CXGB3_SKB_CB(skb)->flags &= ~C3CB_FLAG_NEED_HDR;
+ len += ulp_extra_len(skb);
+ make_tx_data_wr(c3cn, skb, len, req_completion);
+ c3cn->snd_nxt += len;
+ skb_flags(skb) &= ~C3CB_FLAG_NEED_HDR;
}
total_size += skb->truesize;
@@ -735,8 +749,11 @@ static void process_act_establish(struct s3_conn *c3cn, struct sk_buff *skb)
if (unlikely(c3cn_flag(c3cn, C3CN_ACTIVE_CLOSE_NEEDED)))
/* upper layer has requested closing */
send_abort_req(c3cn);
- else if (c3cn_push_tx_frames(c3cn, 1))
+ else {
+ if (skb_queue_len(&c3cn->write_queue))
+ c3cn_push_tx_frames(c3cn, 1);
cxgb3i_conn_tx_open(c3cn);
+ }
}
static int do_act_establish(struct t3cdev *cdev, struct sk_buff *skb,
@@ -1082,8 +1099,8 @@ static void process_rx_iscsi_hdr(struct s3_conn *c3cn, struct sk_buff *skb)
return;
}
- CXGB3_SKB_CB(skb)->seq = ntohl(hdr_cpl->seq);
- CXGB3_SKB_CB(skb)->flags = 0;
+ skb_tcp_seq(skb) = ntohl(hdr_cpl->seq);
+ skb_flags(skb) = 0;
skb_reset_transport_header(skb);
__skb_pull(skb, sizeof(struct cpl_iscsi_hdr));
@@ -1103,12 +1120,12 @@ static void process_rx_iscsi_hdr(struct s3_conn *c3cn, struct sk_buff *skb)
goto abort_conn;
skb_ulp_mode(skb) = ULP2_FLAG_DATA_READY;
- skb_ulp_pdulen(skb) = ntohs(ddp_cpl.len);
- skb_ulp_ddigest(skb) = ntohl(ddp_cpl.ulp_crc);
+ skb_rx_pdulen(skb) = ntohs(ddp_cpl.len);
+ skb_rx_ddigest(skb) = ntohl(ddp_cpl.ulp_crc);
status = ntohl(ddp_cpl.ddp_status);
c3cn_rx_debug("rx skb 0x%p, len %u, pdulen %u, ddp status 0x%x.\n",
- skb, skb->len, skb_ulp_pdulen(skb), status);
+ skb, skb->len, skb_rx_pdulen(skb), status);
if (status & (1 << RX_DDP_STATUS_HCRC_SHIFT))
skb_ulp_mode(skb) |= ULP2_FLAG_HCRC_ERROR;
@@ -1126,7 +1143,7 @@ static void process_rx_iscsi_hdr(struct s3_conn *c3cn, struct sk_buff *skb)
} else if (status & (1 << RX_DDP_STATUS_DDP_SHIFT))
skb_ulp_mode(skb) |= ULP2_FLAG_DATA_DDPED;
- c3cn->rcv_nxt = ntohl(ddp_cpl.seq) + skb_ulp_pdulen(skb);
+ c3cn->rcv_nxt = ntohl(ddp_cpl.seq) + skb_rx_pdulen(skb);
__pskb_trim(skb, len);
__skb_queue_tail(&c3cn->receive_queue, skb);
cxgb3i_conn_pdu_ready(c3cn);
@@ -1151,12 +1168,27 @@ static int do_iscsi_hdr(struct t3cdev *t3dev, struct sk_buff *skb, void *ctx)
* Process an acknowledgment of WR completion. Advance snd_una and send the
* next batch of work requests from the write queue.
*/
+static void check_wr_invariants(struct s3_conn *c3cn)
+{
+ int pending = count_pending_wrs(c3cn);
+
+ if (unlikely(c3cn->wr_avail + pending != c3cn->wr_max))
+ cxgb3i_log_error("TID %u: credit imbalance: avail %u, "
+ "pending %u, total should be %u\n",
+ c3cn->tid, c3cn->wr_avail, pending,
+ c3cn->wr_max);
+}
+
static void process_wr_ack(struct s3_conn *c3cn, struct sk_buff *skb)
{
struct cpl_wr_ack *hdr = cplhdr(skb);
unsigned int credits = ntohs(hdr->credits);
u32 snd_una = ntohl(hdr->snd_una);
+ c3cn_tx_debug("%u WR credits, avail %u, unack %u, TID %u, state %u.\n",
+ credits, c3cn->wr_avail, c3cn->wr_unacked,
+ c3cn->tid, c3cn->state);
+
c3cn->wr_avail += credits;
if (c3cn->wr_unacked > c3cn->wr_max - c3cn->wr_avail)
c3cn->wr_unacked = c3cn->wr_max - c3cn->wr_avail;
@@ -1171,6 +1203,17 @@ static void process_wr_ack(struct s3_conn *c3cn, struct sk_buff *skb)
break;
}
if (unlikely(credits < p->csum)) {
+ struct tx_data_wr *w = cplhdr(p);
+ cxgb3i_log_error("TID %u got %u WR credits need %u, "
+ "len %u, main body %u, frags %u, "
+ "seq # %u, ACK una %u, ACK nxt %u, "
+ "WR_AVAIL %u, WRs pending %u\n",
+ c3cn->tid, credits, p->csum, p->len,
+ p->len - p->data_len,
+ skb_shinfo(p)->nr_frags,
+ ntohl(w->sndseq), snd_una,
+ ntohl(hdr->snd_nxt), c3cn->wr_avail,
+ count_pending_wrs(c3cn) - credits);
p->csum -= credits;
break;
} else {
@@ -1180,15 +1223,24 @@ static void process_wr_ack(struct s3_conn *c3cn, struct sk_buff *skb)
}
}
- if (unlikely(before(snd_una, c3cn->snd_una)))
+ check_wr_invariants(c3cn);
+
+ if (unlikely(before(snd_una, c3cn->snd_una))) {
+ cxgb3i_log_error("TID %u, unexpected sequence # %u in WR_ACK "
+ "snd_una %u\n",
+ c3cn->tid, snd_una, c3cn->snd_una);
goto out_free;
+ }
if (c3cn->snd_una != snd_una) {
c3cn->snd_una = snd_una;
dst_confirm(c3cn->dst_cache);
}
- if (skb_queue_len(&c3cn->write_queue) && c3cn_push_tx_frames(c3cn, 0))
+ if (skb_queue_len(&c3cn->write_queue)) {
+ if (c3cn_push_tx_frames(c3cn, 0))
+ cxgb3i_conn_tx_open(c3cn);
+ } else
cxgb3i_conn_tx_open(c3cn);
out_free:
__kfree_skb(skb);
@@ -1452,7 +1504,7 @@ static void init_offload_conn(struct s3_conn *c3cn,
struct dst_entry *dst)
{
BUG_ON(c3cn->cdev != cdev);
- c3cn->wr_max = c3cn->wr_avail = T3C_DATA(cdev)->max_wrs;
+ c3cn->wr_max = c3cn->wr_avail = T3C_DATA(cdev)->max_wrs - 1;
c3cn->wr_unacked = 0;
c3cn->mss_idx = select_mss(c3cn, dst_mtu(dst));
@@ -1671,9 +1723,17 @@ int cxgb3i_c3cn_send_pdus(struct s3_conn *c3cn, struct sk_buff *skb)
goto out_err;
}
- err = -EPIPE;
if (c3cn->err) {
c3cn_tx_debug("c3cn 0x%p, err %d.\n", c3cn, c3cn->err);
+ err = -EPIPE;
+ goto out_err;
+ }
+
+ if (c3cn->write_seq - c3cn->snd_una >= cxgb3_snd_win) {
+ c3cn_tx_debug("c3cn 0x%p, snd %u - %u > %u.\n",
+ c3cn, c3cn->write_seq, c3cn->snd_una,
+ cxgb3_snd_win);
+ err = -EAGAIN;
goto out_err;
}
diff --git a/drivers/scsi/cxgb3i/cxgb3i_offload.h b/drivers/scsi/cxgb3i/cxgb3i_offload.h
index d23156907ff..6344b9eb258 100644
--- a/drivers/scsi/cxgb3i/cxgb3i_offload.h
+++ b/drivers/scsi/cxgb3i/cxgb3i_offload.h
@@ -178,25 +178,33 @@ void cxgb3i_c3cn_release(struct s3_conn *);
* @flag: see C3CB_FLAG_* below
* @ulp_mode: ULP mode/submode of sk_buff
* @seq: tcp sequence number
- * @ddigest: pdu data digest
- * @pdulen: recovered pdu length
- * @wr_data: scratch area for tx wr
*/
+struct cxgb3_skb_rx_cb {
+ __u32 ddigest; /* data digest */
+ __u32 pdulen; /* recovered pdu length */
+};
+
+struct cxgb3_skb_tx_cb {
+ struct sk_buff *wr_next; /* next wr */
+};
+
struct cxgb3_skb_cb {
__u8 flags;
__u8 ulp_mode;
__u32 seq;
- __u32 ddigest;
- __u32 pdulen;
- struct sk_buff *wr_data;
+ union {
+ struct cxgb3_skb_rx_cb rx;
+ struct cxgb3_skb_tx_cb tx;
+ };
};
#define CXGB3_SKB_CB(skb) ((struct cxgb3_skb_cb *)&((skb)->cb[0]))
-
+#define skb_flags(skb) (CXGB3_SKB_CB(skb)->flags)
#define skb_ulp_mode(skb) (CXGB3_SKB_CB(skb)->ulp_mode)
-#define skb_ulp_ddigest(skb) (CXGB3_SKB_CB(skb)->ddigest)
-#define skb_ulp_pdulen(skb) (CXGB3_SKB_CB(skb)->pdulen)
-#define skb_wr_data(skb) (CXGB3_SKB_CB(skb)->wr_data)
+#define skb_tcp_seq(skb) (CXGB3_SKB_CB(skb)->seq)
+#define skb_rx_ddigest(skb) (CXGB3_SKB_CB(skb)->rx.ddigest)
+#define skb_rx_pdulen(skb) (CXGB3_SKB_CB(skb)->rx.pdulen)
+#define skb_tx_wr_next(skb) (CXGB3_SKB_CB(skb)->tx.wr_next)
enum c3cb_flags {
C3CB_FLAG_NEED_HDR = 1 << 0, /* packet needs a TX_DATA_WR header */
@@ -217,6 +225,7 @@ struct sge_opaque_hdr {
/* for TX: a skb must have a headroom of at least TX_HEADER_LEN bytes */
#define TX_HEADER_LEN \
(sizeof(struct tx_data_wr) + sizeof(struct sge_opaque_hdr))
+#define SKB_TX_HEADROOM SKB_MAX_HEAD(TX_HEADER_LEN)
/*
* get and set private ip for iscsi traffic
diff --git a/drivers/scsi/cxgb3i/cxgb3i_pdu.c b/drivers/scsi/cxgb3i/cxgb3i_pdu.c
index ce7ce8c6094..17115c230d6 100644
--- a/drivers/scsi/cxgb3i/cxgb3i_pdu.c
+++ b/drivers/scsi/cxgb3i/cxgb3i_pdu.c
@@ -32,6 +32,10 @@
#define cxgb3i_tx_debug(fmt...)
#endif
+/* always allocate rooms for AHS */
+#define SKB_TX_PDU_HEADER_LEN \
+ (sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE)
+static unsigned int skb_extra_headroom;
static struct page *pad_page;
/*
@@ -146,12 +150,13 @@ static inline void tx_skb_setmode(struct sk_buff *skb, int hcrc, int dcrc)
void cxgb3i_conn_cleanup_task(struct iscsi_task *task)
{
- struct iscsi_tcp_task *tcp_task = task->dd_data;
+ struct cxgb3i_task_data *tdata = task->dd_data +
+ sizeof(struct iscsi_tcp_task);
/* never reached the xmit task callout */
- if (tcp_task->dd_data)
- kfree_skb(tcp_task->dd_data);
- tcp_task->dd_data = NULL;
+ if (tdata->skb)
+ __kfree_skb(tdata->skb);
+ memset(tdata, 0, sizeof(struct cxgb3i_task_data));
/* MNC - Do we need a check in case this is called but
* cxgb3i_conn_alloc_pdu has never been called on the task */
@@ -159,28 +164,102 @@ void cxgb3i_conn_cleanup_task(struct iscsi_task *task)
iscsi_tcp_cleanup_task(task);
}
-/*
- * We do not support ahs yet
- */
+static int sgl_seek_offset(struct scatterlist *sgl, unsigned int sgcnt,
+ unsigned int offset, unsigned int *off,
+ struct scatterlist **sgp)
+{
+ int i;
+ struct scatterlist *sg;
+
+ for_each_sg(sgl, sg, sgcnt, i) {
+ if (offset < sg->length) {
+ *off = offset;
+ *sgp = sg;
+ return 0;
+ }
+ offset -= sg->length;
+ }
+ return -EFAULT;
+}
+
+static int sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset,
+ unsigned int dlen, skb_frag_t *frags,
+ int frag_max)
+{
+ unsigned int datalen = dlen;
+ unsigned int sglen = sg->length - sgoffset;
+ struct page *page = sg_page(sg);
+ int i;
+
+ i = 0;
+ do {
+ unsigned int copy;
+
+ if (!sglen) {
+ sg = sg_next(sg);
+ if (!sg) {
+ cxgb3i_log_error("%s, sg NULL, len %u/%u.\n",
+ __func__, datalen, dlen);
+ return -EINVAL;
+ }
+ sgoffset = 0;
+ sglen = sg->length;
+ page = sg_page(sg);
+
+ }
+ copy = min(datalen, sglen);
+ if (i && page == frags[i - 1].page &&
+ sgoffset + sg->offset ==
+ frags[i - 1].page_offset + frags[i - 1].size) {
+ frags[i - 1].size += copy;
+ } else {
+ if (i >= frag_max) {
+ cxgb3i_log_error("%s, too many pages %u, "
+ "dlen %u.\n", __func__,
+ frag_max, dlen);
+ return -EINVAL;
+ }
+
+ frags[i].page = page;
+ frags[i].page_offset = sg->offset + sgoffset;
+ frags[i].size = copy;
+ i++;
+ }
+ datalen -= copy;
+ sgoffset += copy;
+ sglen -= copy;
+ } while (datalen);
+
+ return i;
+}
+
int cxgb3i_conn_alloc_pdu(struct iscsi_task *task, u8 opcode)
{
+ struct iscsi_conn *conn = task->conn;
struct iscsi_tcp_task *tcp_task = task->dd_data;
- struct sk_buff *skb;
+ struct cxgb3i_task_data *tdata = task->dd_data + sizeof(*tcp_task);
+ struct scsi_cmnd *sc = task->sc;
+ int headroom = SKB_TX_PDU_HEADER_LEN;
+ tcp_task->dd_data = tdata;
task->hdr = NULL;
- /* always allocate rooms for AHS */
- skb = alloc_skb(sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE +
- TX_HEADER_LEN, GFP_ATOMIC);
- if (!skb)
+
+ /* write command, need to send data pdus */
+ if (skb_extra_headroom && (opcode == ISCSI_OP_SCSI_DATA_OUT ||
+ (opcode == ISCSI_OP_SCSI_CMD &&
+ (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_TO_DEVICE))))
+ headroom += min(skb_extra_headroom, conn->max_xmit_dlength);
+
+ tdata->skb = alloc_skb(TX_HEADER_LEN + headroom, GFP_ATOMIC);
+ if (!tdata->skb)
return -ENOMEM;
+ skb_reserve(tdata->skb, TX_HEADER_LEN);
cxgb3i_tx_debug("task 0x%p, opcode 0x%x, skb 0x%p.\n",
- task, opcode, skb);
+ task, opcode, tdata->skb);
- tcp_task->dd_data = skb;
- skb_reserve(skb, TX_HEADER_LEN);
- task->hdr = (struct iscsi_hdr *)skb->data;
- task->hdr_max = sizeof(struct iscsi_hdr);
+ task->hdr = (struct iscsi_hdr *)tdata->skb->data;
+ task->hdr_max = SKB_TX_PDU_HEADER_LEN;
/* data_out uses scsi_cmd's itt */
if (opcode != ISCSI_OP_SCSI_DATA_OUT)
@@ -192,13 +271,13 @@ int cxgb3i_conn_alloc_pdu(struct iscsi_task *task, u8 opcode)
int cxgb3i_conn_init_pdu(struct iscsi_task *task, unsigned int offset,
unsigned int count)
{
- struct iscsi_tcp_task *tcp_task = task->dd_data;
- struct sk_buff *skb = tcp_task->dd_data;
struct iscsi_conn *conn = task->conn;
- struct page *pg;
+ struct iscsi_tcp_task *tcp_task = task->dd_data;
+ struct cxgb3i_task_data *tdata = tcp_task->dd_data;
+ struct sk_buff *skb = tdata->skb;
unsigned int datalen = count;
int i, padlen = iscsi_padding(count);
- skb_frag_t *frag;
+ struct page *pg;
cxgb3i_tx_debug("task 0x%p,0x%p, offset %u, count %u, skb 0x%p.\n",
task, task->sc, offset, count, skb);
@@ -209,90 +288,94 @@ int cxgb3i_conn_init_pdu(struct iscsi_task *task, unsigned int offset,
return 0;
if (task->sc) {
- struct scatterlist *sg;
- struct scsi_data_buffer *sdb;
- unsigned int sgoffset = offset;
- struct page *sgpg;
- unsigned int sglen;
-
- sdb = scsi_out(task->sc);
- sg = sdb->table.sgl;
-
- for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) {
- cxgb3i_tx_debug("sg %d, page 0x%p, len %u offset %u\n",
- i, sg_page(sg), sg->length, sg->offset);
-
- if (sgoffset < sg->length)
- break;
- sgoffset -= sg->length;
+ struct scsi_data_buffer *sdb = scsi_out(task->sc);
+ struct scatterlist *sg = NULL;
+ int err;
+
+ tdata->offset = offset;
+ tdata->count = count;
+ err = sgl_seek_offset(sdb->table.sgl, sdb->table.nents,
+ tdata->offset, &tdata->sgoffset, &sg);
+ if (err < 0) {
+ cxgb3i_log_warn("tpdu, sgl %u, bad offset %u/%u.\n",
+ sdb->table.nents, tdata->offset,
+ sdb->length);
+ return err;
}
- sgpg = sg_page(sg);
- sglen = sg->length - sgoffset;
-
- do {
- int j = skb_shinfo(skb)->nr_frags;
- unsigned int copy;
-
- if (!sglen) {
- sg = sg_next(sg);
- sgpg = sg_page(sg);
- sgoffset = 0;
- sglen = sg->length;
- ++i;
+ err = sgl_read_to_frags(sg, tdata->sgoffset, tdata->count,
+ tdata->frags, MAX_PDU_FRAGS);
+ if (err < 0) {
+ cxgb3i_log_warn("tpdu, sgl %u, bad offset %u + %u.\n",
+ sdb->table.nents, tdata->offset,
+ tdata->count);
+ return err;
+ }
+ tdata->nr_frags = err;
+
+ if (tdata->nr_frags > MAX_SKB_FRAGS ||
+ (padlen && tdata->nr_frags == MAX_SKB_FRAGS)) {
+ char *dst = skb->data + task->hdr_len;
+ skb_frag_t *frag = tdata->frags;
+
+ /* data fits in the skb's headroom */
+ for (i = 0; i < tdata->nr_frags; i++, frag++) {
+ char *src = kmap_atomic(frag->page,
+ KM_SOFTIRQ0);
+
+ memcpy(dst, src+frag->page_offset, frag->size);
+ dst += frag->size;
+ kunmap_atomic(src, KM_SOFTIRQ0);
}
- copy = min(sglen, datalen);
- if (j && skb_can_coalesce(skb, j, sgpg,
- sg->offset + sgoffset)) {
- skb_shinfo(skb)->frags[j - 1].size += copy;
- } else {
- get_page(sgpg);
- skb_fill_page_desc(skb, j, sgpg,
- sg->offset + sgoffset, copy);
+ if (padlen) {
+ memset(dst, 0, padlen);
+ padlen = 0;
}
- sgoffset += copy;
- sglen -= copy;
- datalen -= copy;
- } while (datalen);
+ skb_put(skb, count + padlen);
+ } else {
+ /* data fit into frag_list */
+ for (i = 0; i < tdata->nr_frags; i++)
+ get_page(tdata->frags[i].page);
+
+ memcpy(skb_shinfo(skb)->frags, tdata->frags,
+ sizeof(skb_frag_t) * tdata->nr_frags);
+ skb_shinfo(skb)->nr_frags = tdata->nr_frags;
+ skb->len += count;
+ skb->data_len += count;
+ skb->truesize += count;
+ }
+
} else {
pg = virt_to_page(task->data);
- while (datalen) {
- i = skb_shinfo(skb)->nr_frags;
- frag = &skb_shinfo(skb)->frags[i];
-
- get_page(pg);
- frag->page = pg;
- frag->page_offset = 0;
- frag->size = min((unsigned int)PAGE_SIZE, datalen);
-
- skb_shinfo(skb)->nr_frags++;
- datalen -= frag->size;
- pg++;
- }
+ get_page(pg);
+ skb_fill_page_desc(skb, 0, pg, offset_in_page(task->data),
+ count);
+ skb->len += count;
+ skb->data_len += count;
+ skb->truesize += count;
}
if (padlen) {
i = skb_shinfo(skb)->nr_frags;
- frag = &skb_shinfo(skb)->frags[i];
- frag->page = pad_page;
- frag->page_offset = 0;
- frag->size = padlen;
- skb_shinfo(skb)->nr_frags++;
+ get_page(pad_page);
+ skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, pad_page, 0,
+ padlen);
+
+ skb->data_len += padlen;
+ skb->truesize += padlen;
+ skb->len += padlen;
}
- datalen = count + padlen;
- skb->data_len += datalen;
- skb->truesize += datalen;
- skb->len += datalen;
return 0;
}
int cxgb3i_conn_xmit_pdu(struct iscsi_task *task)
{
- struct iscsi_tcp_task *tcp_task = task->dd_data;
- struct sk_buff *skb = tcp_task->dd_data;
struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
struct cxgb3i_conn *cconn = tcp_conn->dd_data;
+ struct iscsi_tcp_task *tcp_task = task->dd_data;
+ struct cxgb3i_task_data *tdata = tcp_task->dd_data;
+ struct sk_buff *skb = tdata->skb;
unsigned int datalen;
int err;
@@ -300,13 +383,14 @@ int cxgb3i_conn_xmit_pdu(struct iscsi_task *task)
return 0;
datalen = skb->data_len;
- tcp_task->dd_data = NULL;
+ tdata->skb = NULL;
err = cxgb3i_c3cn_send_pdus(cconn->cep->c3cn, skb);
- cxgb3i_tx_debug("task 0x%p, skb 0x%p, len %u/%u, rv %d.\n",
- task, skb, skb->len, skb->data_len, err);
if (err > 0) {
int pdulen = err;
+ cxgb3i_tx_debug("task 0x%p, skb 0x%p, len %u/%u, rv %d.\n",
+ task, skb, skb->len, skb->data_len, err);
+
if (task->conn->hdrdgst_en)
pdulen += ISCSI_DIGEST_SIZE;
if (datalen && task->conn->datadgst_en)
@@ -325,12 +409,14 @@ int cxgb3i_conn_xmit_pdu(struct iscsi_task *task)
return err;
}
/* reset skb to send when we are called again */
- tcp_task->dd_data = skb;
+ tdata->skb = skb;
return -EAGAIN;
}
int cxgb3i_pdu_init(void)
{
+ if (SKB_TX_HEADROOM > (512 * MAX_SKB_FRAGS))
+ skb_extra_headroom = SKB_TX_HEADROOM;
pad_page = alloc_page(GFP_KERNEL);
if (!pad_page)
return -ENOMEM;
@@ -366,7 +452,9 @@ void cxgb3i_conn_pdu_ready(struct s3_conn *c3cn)
skb = skb_peek(&c3cn->receive_queue);
while (!err && skb) {
__skb_unlink(skb, &c3cn->receive_queue);
- read += skb_ulp_pdulen(skb);
+ read += skb_rx_pdulen(skb);
+ cxgb3i_rx_debug("conn 0x%p, cn 0x%p, rx skb 0x%p, pdulen %u.\n",
+ conn, c3cn, skb, skb_rx_pdulen(skb));
err = cxgb3i_conn_read_pdu_skb(conn, skb);
__kfree_skb(skb);
skb = skb_peek(&c3cn->receive_queue);
@@ -377,6 +465,11 @@ void cxgb3i_conn_pdu_ready(struct s3_conn *c3cn)
cxgb3i_c3cn_rx_credits(c3cn, read);
}
conn->rxdata_octets += read;
+
+ if (err) {
+ cxgb3i_log_info("conn 0x%p rx failed err %d.\n", conn, err);
+ iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ }
}
void cxgb3i_conn_tx_open(struct s3_conn *c3cn)
diff --git a/drivers/scsi/cxgb3i/cxgb3i_pdu.h b/drivers/scsi/cxgb3i/cxgb3i_pdu.h
index a3f685cc236..0770b23d90d 100644
--- a/drivers/scsi/cxgb3i/cxgb3i_pdu.h
+++ b/drivers/scsi/cxgb3i/cxgb3i_pdu.h
@@ -53,7 +53,7 @@ struct cpl_rx_data_ddp_norss {
#define ULP2_FLAG_DCRC_ERROR 0x20
#define ULP2_FLAG_PAD_ERROR 0x40
-void cxgb3i_conn_closing(struct s3_conn *);
+void cxgb3i_conn_closing(struct s3_conn *c3cn);
void cxgb3i_conn_pdu_ready(struct s3_conn *c3cn);
void cxgb3i_conn_tx_open(struct s3_conn *c3cn);
#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-05 03:49:21 +0000