if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
len += sizeof(struct fw_ofld_tx_data_wr);
- return len <= MAX_IMM_TX_PKT_LEN;
+ if (likely(cxgbi_skcb_test_flag((struct sk_buff *)skb, SKCBF_TX_ISO)))
+ len += sizeof(struct cpl_tx_data_iso);
+
+ return (len <= MAX_IMM_OFLD_TX_DATA_WR_LEN);
}
static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
flowc->mnemval[8].mnemonic = 0;
flowc->mnemval[8].val = 0;
flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
- flowc->mnemval[8].val = 16384;
+ if (csk->cdev->skb_iso_txhdr)
+ flowc->mnemval[8].val = cpu_to_be32(CXGBI_MAX_ISO_DATA_IN_SKB);
+ else
+ flowc->mnemval[8].val = cpu_to_be32(16128);
#ifdef CONFIG_CHELSIO_T4_DCB
flowc->mnemval[9].mnemonic = FW_FLOWC_MNEM_DCBPRIO;
if (vlan == CPL_L2T_VLAN_NONE) {
return flowclen16;
}
-static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
- int dlen, int len, u32 credits, int compl)
+static void
+cxgb4i_make_tx_iso_cpl(struct sk_buff *skb, struct cpl_tx_data_iso *cpl)
+{
+ struct cxgbi_iso_info *info = (struct cxgbi_iso_info *)skb->head;
+ u32 imm_en = !!(info->flags & CXGBI_ISO_INFO_IMM_ENABLE);
+ u32 fslice = !!(info->flags & CXGBI_ISO_INFO_FSLICE);
+ u32 lslice = !!(info->flags & CXGBI_ISO_INFO_LSLICE);
+ u32 pdu_type = (info->op == ISCSI_OP_SCSI_CMD) ? 0 : 1;
+ u32 submode = cxgbi_skcb_tx_ulp_mode(skb) & 0x3;
+
+ cpl->op_to_scsi = cpu_to_be32(CPL_TX_DATA_ISO_OP_V(CPL_TX_DATA_ISO) |
+ CPL_TX_DATA_ISO_FIRST_V(fslice) |
+ CPL_TX_DATA_ISO_LAST_V(lslice) |
+ CPL_TX_DATA_ISO_CPLHDRLEN_V(0) |
+ CPL_TX_DATA_ISO_HDRCRC_V(submode & 1) |
+ CPL_TX_DATA_ISO_PLDCRC_V(((submode >> 1) & 1)) |
+ CPL_TX_DATA_ISO_IMMEDIATE_V(imm_en) |
+ CPL_TX_DATA_ISO_SCSI_V(pdu_type));
+
+ cpl->ahs_len = info->ahs;
+ cpl->mpdu = cpu_to_be16(DIV_ROUND_UP(info->mpdu, 4));
+ cpl->burst_size = cpu_to_be32(info->burst_size);
+ cpl->len = cpu_to_be32(info->len);
+ cpl->reserved2_seglen_offset =
+ cpu_to_be32(CPL_TX_DATA_ISO_SEGLEN_OFFSET_V(info->segment_offset));
+ cpl->datasn_offset = cpu_to_be32(info->datasn_offset);
+ cpl->buffer_offset = cpu_to_be32(info->buffer_offset);
+ cpl->reserved3 = cpu_to_be32(0);
+ log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
+ "iso: flags 0x%x, op %u, ahs %u, num_pdu %u, mpdu %u, "
+ "burst_size %u, iso_len %u\n",
+ info->flags, info->op, info->ahs, info->num_pdu,
+ info->mpdu, info->burst_size << 2, info->len);
+}
+
+static void
+cxgb4i_make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, int dlen,
+ int len, u32 credits, int compl)
{
+ struct cxgbi_device *cdev = csk->cdev;
+ struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct fw_ofld_tx_data_wr *req;
- unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
- unsigned int wr_ulp_mode = 0, val;
- bool imm = is_ofld_imm(skb);
-
- req = __skb_push(skb, sizeof(*req));
-
- if (imm) {
- req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
- FW_WR_COMPL_F |
- FW_WR_IMMDLEN_V(dlen));
- req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) |
- FW_WR_LEN16_V(credits));
- } else {
- req->op_to_immdlen =
- cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
- FW_WR_COMPL_F |
- FW_WR_IMMDLEN_V(0));
- req->flowid_len16 =
- cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
- FW_WR_LEN16_V(credits));
+ struct cpl_tx_data_iso *cpl;
+ u32 submode = cxgbi_skcb_tx_ulp_mode(skb) & 0x3;
+ u32 wr_ulp_mode = 0;
+ u32 hdr_size = sizeof(*req);
+ u32 opcode = FW_OFLD_TX_DATA_WR;
+ u32 immlen = 0;
+ u32 force = is_t5(lldi->adapter_type) ? TX_FORCE_V(!submode) :
+ T6_TX_FORCE_F;
+
+ if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)) {
+ hdr_size += sizeof(struct cpl_tx_data_iso);
+ opcode = FW_ISCSI_TX_DATA_WR;
+ immlen += sizeof(struct cpl_tx_data_iso);
+ submode |= 8;
}
+
+ if (is_ofld_imm(skb))
+ immlen += dlen;
+
+ req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, hdr_size);
+ req->op_to_immdlen = cpu_to_be32(FW_WR_OP_V(opcode) |
+ FW_WR_COMPL_V(compl) |
+ FW_WR_IMMDLEN_V(immlen));
+ req->flowid_len16 = cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
+ FW_WR_LEN16_V(credits));
+ req->plen = cpu_to_be32(len);
+ cpl = (struct cpl_tx_data_iso *)(req + 1);
+
+ if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)))
+ cxgb4i_make_tx_iso_cpl(skb, cpl);
+
if (submode)
wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
- FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
- val = skb_peek(&csk->write_queue) ? 0 : 1;
- req->tunnel_to_proxy = htonl(wr_ulp_mode |
- FW_OFLD_TX_DATA_WR_SHOVE_V(val));
- req->plen = htonl(len);
+ FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
+
+ req->tunnel_to_proxy = cpu_to_be32(wr_ulp_mode | force |
+ FW_OFLD_TX_DATA_WR_SHOVE_V(1U));
+
if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
}
if (unlikely(csk->state < CTP_ESTABLISHED ||
csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
- 1 << CXGBI_DBG_PDU_TX,
- "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
- csk, csk->state, csk->flags, csk->tid);
+ 1 << CXGBI_DBG_PDU_TX,
+ "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
+ csk, csk->state, csk->flags, csk->tid);
return 0;
}
- while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
- int dlen = skb->len;
- int len = skb->len;
- unsigned int credits_needed;
- int flowclen16 = 0;
+ while (csk->wr_cred && ((skb = skb_peek(&csk->write_queue)) != NULL)) {
+ struct cxgbi_iso_info *iso_cpl;
+ u32 dlen = skb->len;
+ u32 len = skb->len;
+ u32 iso_cpl_len = 0;
+ u32 flowclen16 = 0;
+ u32 credits_needed;
+ u32 num_pdu = 1, hdr_len;
+
+ if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO))
+ iso_cpl_len = sizeof(struct cpl_tx_data_iso);
- skb_reset_transport_header(skb);
if (is_ofld_imm(skb))
- credits_needed = DIV_ROUND_UP(dlen, 16);
+ credits_needed = DIV_ROUND_UP(dlen + iso_cpl_len, 16);
else
- credits_needed = DIV_ROUND_UP(
- 8 * calc_tx_flits_ofld(skb),
- 16);
+ credits_needed =
+ DIV_ROUND_UP((8 * calc_tx_flits_ofld(skb)) +
+ iso_cpl_len, 16);
if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
- credits_needed += DIV_ROUND_UP(
- sizeof(struct fw_ofld_tx_data_wr),
- 16);
+ credits_needed +=
+ DIV_ROUND_UP(sizeof(struct fw_ofld_tx_data_wr), 16);
/*
* Assumes the initial credits is large enough to support
if (csk->wr_cred < credits_needed) {
log_debug(1 << CXGBI_DBG_PDU_TX,
- "csk 0x%p, skb %u/%u, wr %d < %u.\n",
- csk, skb->len, skb->data_len,
- credits_needed, csk->wr_cred);
+ "csk 0x%p, skb %u/%u, wr %d < %u.\n",
+ csk, skb->len, skb->data_len,
+ credits_needed, csk->wr_cred);
+
+ csk->no_tx_credits++;
break;
}
+
+ csk->no_tx_credits = 0;
+
__skb_unlink(skb, &csk->write_queue);
set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
- skb->csum = credits_needed + flowclen16;
+ skb->csum = (__force __wsum)(credits_needed + flowclen16);
csk->wr_cred -= credits_needed;
csk->wr_una_cred += credits_needed;
cxgbi_sock_enqueue_wr(csk, skb);
csk, skb->len, skb->data_len, credits_needed,
csk->wr_cred, csk->wr_una_cred);
+ if (!req_completion &&
+ ((csk->wr_una_cred >= (csk->wr_max_cred / 2)) ||
+ after(csk->write_seq, (csk->snd_una + csk->snd_win / 2))))
+ req_completion = 1;
+
if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
- len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
- make_tx_data_wr(csk, skb, dlen, len, credits_needed,
- req_completion);
+ u32 ulp_mode = cxgbi_skcb_tx_ulp_mode(skb);
+
+ if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)) {
+ iso_cpl = (struct cxgbi_iso_info *)skb->head;
+ num_pdu = iso_cpl->num_pdu;
+ hdr_len = cxgbi_skcb_tx_iscsi_hdrlen(skb);
+ len += (cxgbi_ulp_extra_len(ulp_mode) * num_pdu) +
+ (hdr_len * (num_pdu - 1));
+ } else {
+ len += cxgbi_ulp_extra_len(ulp_mode);
+ }
+
+ cxgb4i_make_tx_data_wr(csk, skb, dlen, len,
+ credits_needed, req_completion);
csk->snd_nxt += len;
cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
} else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) &&
(csk->wr_una_cred >= (csk->wr_max_cred / 2))) {
struct cpl_close_con_req *req =
(struct cpl_close_con_req *)skb->data;
- req->wr.wr_hi |= htonl(FW_WR_COMPL_F);
+
+ req->wr.wr_hi |= cpu_to_be32(FW_WR_COMPL_F);
}
+
total_size += skb->truesize;
t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
- "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
- csk, csk->state, csk->flags, csk->tid, skb, len);
-
+ "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
+ csk, csk->state, csk->flags, csk->tid, skb, len);
cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
}
return total_size;
return 0;
}
+static bool is_memfree(struct adapter *adap)
+{
+ u32 io;
+
+ io = t4_read_reg(adap, MA_TARGET_MEM_ENABLE_A);
+ if (is_t5(adap->params.chip)) {
+ if ((io & EXT_MEM0_ENABLE_F) || (io & EXT_MEM1_ENABLE_F))
+ return false;
+ } else if (io & EXT_MEM_ENABLE_F) {
+ return false;
+ }
+
+ return true;
+}
+
static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
{
struct cxgbi_device *cdev;
struct port_info *pi;
+ struct net_device *ndev;
+ struct adapter *adap;
+ struct tid_info *t;
+ u32 max_cmds = CXGB4I_SCSI_HOST_QDEPTH;
+ u32 max_conn = CXGBI_MAX_CONN;
int i, rc;
cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
pr_info("t4 0x%p ddp init failed %d.\n", cdev, rc);
goto err_out;
}
+
+ ndev = cdev->ports[0];
+ adap = netdev2adap(ndev);
+ if (adap) {
+ t = &adap->tids;
+ if (t->ntids <= CXGBI_MAX_CONN)
+ max_conn = t->ntids;
+
+ if (is_memfree(adap)) {
+ cdev->flags |= CXGBI_FLAG_DEV_ISO_OFF;
+ max_cmds = CXGB4I_SCSI_HOST_QDEPTH >> 2;
+
+ pr_info("%s: 0x%p, tid %u, SO adapter.\n",
+ ndev->name, cdev, t->ntids);
+ }
+ } else {
+ pr_info("%s, 0x%p, NO adapter struct.\n", ndev->name, cdev);
+ }
+
+ /* ISO is enabled in T5/T6 firmware version >= 1.13.43.0 */
+ if (!is_t4(lldi->adapter_type) &&
+ (lldi->fw_vers >= 0x10d2b00) &&
+ !(cdev->flags & CXGBI_FLAG_DEV_ISO_OFF))
+ cdev->skb_iso_txhdr = sizeof(struct cpl_tx_data_iso);
+
rc = cxgb4i_ofld_init(cdev);
if (rc) {
pr_info("t4 0x%p ofld init failed.\n", cdev);
goto err_out;
}
- rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
- &cxgb4i_host_template, cxgb4i_stt);
+ cxgb4i_host_template.can_queue = max_cmds;
+ rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, max_conn,
+ &cxgb4i_host_template, cxgb4i_stt);
if (rc)
goto err_out;
shost->max_lun = max_lun;
shost->max_id = max_id;
shost->max_channel = 0;
- shost->max_cmd_len = 16;
+ shost->max_cmd_len = SCSI_MAX_VARLEN_CDB_SIZE;
chba = iscsi_host_priv(shost);
chba->cdev = cdev;
chba->ndev = cdev->ports[i];
chba->shost = shost;
+ shost->can_queue = sht->can_queue - ISCSI_MGMT_CMDS_MAX;
+
log_debug(1 << CXGBI_DBG_DEV,
"cdev 0x%p, p#%d %s: chba 0x%p.\n",
cdev, i, cdev->ports[i]->name, chba);
}
EXPORT_SYMBOL_GPL(cxgbi_sock_check_wr_invariants);
-static int cxgbi_sock_send_pdus(struct cxgbi_sock *csk, struct sk_buff *skb)
-{
- struct cxgbi_device *cdev = csk->cdev;
- struct sk_buff *next;
- int err, copied = 0;
-
- spin_lock_bh(&csk->lock);
-
- if (csk->state != CTP_ESTABLISHED) {
- log_debug(1 << CXGBI_DBG_PDU_TX,
- "csk 0x%p,%u,0x%lx,%u, EAGAIN.\n",
- csk, csk->state, csk->flags, csk->tid);
- err = -EAGAIN;
- goto out_err;
- }
-
- if (csk->err) {
- log_debug(1 << CXGBI_DBG_PDU_TX,
- "csk 0x%p,%u,0x%lx,%u, EPIPE %d.\n",
- csk, csk->state, csk->flags, csk->tid, csk->err);
- err = -EPIPE;
- goto out_err;
- }
-
- if (csk->write_seq - csk->snd_una >= csk->snd_win) {
- log_debug(1 << CXGBI_DBG_PDU_TX,
- "csk 0x%p,%u,0x%lx,%u, FULL %u-%u >= %u.\n",
- csk, csk->state, csk->flags, csk->tid, csk->write_seq,
- csk->snd_una, csk->snd_win);
- err = -ENOBUFS;
- goto out_err;
- }
-
- while (skb) {
- int frags = skb_shinfo(skb)->nr_frags +
- (skb->len != skb->data_len);
-
- if (unlikely(skb_headroom(skb) < cdev->skb_tx_rsvd)) {
- pr_err("csk 0x%p, skb head %u < %u.\n",
- csk, skb_headroom(skb), cdev->skb_tx_rsvd);
- err = -EINVAL;
- goto out_err;
- }
-
- if (frags >= SKB_WR_LIST_SIZE) {
- pr_err("csk 0x%p, frags %d, %u,%u >%u.\n",
- csk, skb_shinfo(skb)->nr_frags, skb->len,
- skb->data_len, (uint)(SKB_WR_LIST_SIZE));
- err = -EINVAL;
- goto out_err;
- }
-
- next = skb->next;
- skb->next = NULL;
- cxgbi_skcb_set_flag(skb, SKCBF_TX_NEED_HDR);
- cxgbi_sock_skb_entail(csk, skb);
- copied += skb->len;
- csk->write_seq += skb->len +
- cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
- skb = next;
- }
-
- if (likely(skb_queue_len(&csk->write_queue)))
- cdev->csk_push_tx_frames(csk, 1);
-done:
- spin_unlock_bh(&csk->lock);
- return copied;
-
-out_err:
- if (copied == 0 && err == -EPIPE)
- copied = csk->err ? csk->err : -EPIPE;
- else
- copied = err;
- goto done;
-}
-
static inline void
scmd_get_params(struct scsi_cmnd *sc, struct scatterlist **sgl,
unsigned int *sgcnt, unsigned int *dlen,
* APIs interacting with open-iscsi libraries
*/
-static unsigned char padding[4];
-
int cxgbi_ddp_ppm_setup(void **ppm_pp, struct cxgbi_device *cdev,
struct cxgbi_tag_format *tformat,
unsigned int iscsi_size, unsigned int llimit,
return -EFAULT;
}
-static int sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset,
- unsigned int dlen, struct page_frag *frags,
- int frag_max)
+static int
+sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset,
+ unsigned int dlen, struct page_frag *frags,
+ int frag_max, u32 *dlimit)
{
unsigned int datalen = dlen;
unsigned int sglen = sg->length - sgoffset;
if (i >= frag_max) {
pr_warn("too many pages %u, dlen %u.\n",
frag_max, dlen);
+ *dlimit = dlen - datalen;
return -EINVAL;
}
return i;
}
-int cxgbi_conn_alloc_pdu(struct iscsi_task *task, u8 opcode)
+static void cxgbi_task_data_sgl_check(struct iscsi_task *task)
{
- struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
+ struct scsi_cmnd *sc = task->sc;
+ struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
+ struct scatterlist *sg, *sgl = NULL;
+ u32 sgcnt = 0;
+ int i;
+
+ tdata->flags = CXGBI_TASK_SGL_CHECKED;
+ if (!sc)
+ return;
+
+ scmd_get_params(sc, &sgl, &sgcnt, &tdata->dlen, 0);
+ if (!sgl || !sgcnt) {
+ tdata->flags |= CXGBI_TASK_SGL_COPY;
+ return;
+ }
+
+ for_each_sg(sgl, sg, sgcnt, i) {
+ if (page_count(sg_page(sg)) < 1) {
+ tdata->flags |= CXGBI_TASK_SGL_COPY;
+ return;
+ }
+ }
+}
+
+static int
+cxgbi_task_data_sgl_read(struct iscsi_task *task, u32 offset, u32 count,
+ u32 *dlimit)
+{
+ struct scsi_cmnd *sc = task->sc;
+ struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
+ struct scatterlist *sgl = NULL;
+ struct scatterlist *sg;
+ u32 dlen = 0;
+ u32 sgcnt;
+ int err;
+
+ if (!sc)
+ return 0;
+
+ scmd_get_params(sc, &sgl, &sgcnt, &dlen, 0);
+ if (!sgl || !sgcnt)
+ return 0;
+
+ err = sgl_seek_offset(sgl, sgcnt, offset, &tdata->sgoffset, &sg);
+ if (err < 0) {
+ pr_warn("tpdu max, sgl %u, bad offset %u/%u.\n",
+ sgcnt, offset, tdata->dlen);
+ return err;
+ }
+ err = sgl_read_to_frags(sg, tdata->sgoffset, count,
+ tdata->frags, MAX_SKB_FRAGS, dlimit);
+ if (err < 0) {
+ log_debug(1 << CXGBI_DBG_ISCSI,
+ "sgl max limit, sgl %u, offset %u, %u/%u, dlimit %u.\n",
+ sgcnt, offset, count, tdata->dlen, *dlimit);
+ return err;
+ }
+ tdata->offset = offset;
+ tdata->count = count;
+ tdata->nr_frags = err;
+ tdata->total_count = count;
+ tdata->total_offset = offset;
+
+ log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
+ "%s: offset %u, count %u,\n"
+ "err %u, total_count %u, total_offset %u\n",
+ __func__, offset, count, err, tdata->total_count, tdata->total_offset);
+
+ return 0;
+}
+
+int cxgbi_conn_alloc_pdu(struct iscsi_task *task, u8 op)
+{
+ struct iscsi_conn *conn = task->conn;
+ struct iscsi_session *session = task->conn->session;
+ struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct cxgbi_conn *cconn = tcp_conn->dd_data;
struct cxgbi_device *cdev = cconn->chba->cdev;
- struct iscsi_conn *conn = task->conn;
+ struct cxgbi_sock *csk = (cconn && cconn->cep) ? cconn->cep->csk : NULL;
struct iscsi_tcp_task *tcp_task = task->dd_data;
struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
struct scsi_cmnd *sc = task->sc;
- struct cxgbi_sock *csk = cconn->cep->csk;
- struct net_device *ndev = cdev->ports[csk->port_id];
- int headroom = SKB_TX_ISCSI_PDU_HEADER_MAX;
+ u32 headroom = SKB_TX_ISCSI_PDU_HEADER_MAX;
+ u32 max_txdata_len = conn->max_xmit_dlength;
+ u32 iso_tx_rsvd = 0, local_iso_info = 0;
+ u32 last_tdata_offset, last_tdata_count;
+ int err = 0;
+
+ if (!tcp_task || !tdata) {
+ pr_err("task 0x%p, tcp_task 0x%p, tdata 0x%p.\n",
+ task, tcp_task, tdata);
+ return -ENOMEM;
+ }
+ if (!csk) {
+ pr_err("task 0x%p, csk gone.\n", task);
+ return -EPIPE;
+ }
+
+ op &= ISCSI_OPCODE_MASK;
tcp_task->dd_data = tdata;
task->hdr = NULL;
- if (SKB_MAX_HEAD(cdev->skb_tx_rsvd) > (512 * MAX_SKB_FRAGS) &&
- (opcode == ISCSI_OP_SCSI_DATA_OUT ||
- (opcode == ISCSI_OP_SCSI_CMD &&
- sc->sc_data_direction == DMA_TO_DEVICE)))
- /* data could goes into skb head */
- headroom += min_t(unsigned int,
- SKB_MAX_HEAD(cdev->skb_tx_rsvd),
- conn->max_xmit_dlength);
+ last_tdata_count = tdata->count;
+ last_tdata_offset = tdata->offset;
- tdata->skb = alloc_skb(cdev->skb_tx_rsvd + headroom, GFP_ATOMIC);
+ if ((op == ISCSI_OP_SCSI_DATA_OUT) ||
+ ((op == ISCSI_OP_SCSI_CMD) &&
+ (sc->sc_data_direction == DMA_TO_DEVICE))) {
+ u32 remaining_data_tosend, dlimit = 0;
+ u32 max_pdu_size, max_num_pdu, num_pdu;
+ u32 count;
+
+ /* Preserve conn->max_xmit_dlength because it can get updated to
+ * ISO data size.
+ */
+ if (task->state == ISCSI_TASK_PENDING)
+ tdata->max_xmit_dlength = conn->max_xmit_dlength;
+
+ if (!tdata->offset)
+ cxgbi_task_data_sgl_check(task);
+
+ remaining_data_tosend =
+ tdata->dlen - tdata->offset - tdata->count;
+
+recalculate_sgl:
+ max_txdata_len = tdata->max_xmit_dlength;
+ log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
+ "tdata->dlen %u, remaining to send %u "
+ "conn->max_xmit_dlength %u, "
+ "tdata->max_xmit_dlength %u\n",
+ tdata->dlen, remaining_data_tosend,
+ conn->max_xmit_dlength, tdata->max_xmit_dlength);
+
+ if (cdev->skb_iso_txhdr && !csk->disable_iso &&
+ (remaining_data_tosend > tdata->max_xmit_dlength) &&
+ !(remaining_data_tosend % 4)) {
+ u32 max_iso_data;
+
+ if ((op == ISCSI_OP_SCSI_CMD) &&
+ session->initial_r2t_en)
+ goto no_iso;
+
+ max_pdu_size = tdata->max_xmit_dlength +
+ ISCSI_PDU_NONPAYLOAD_LEN;
+ max_iso_data = rounddown(CXGBI_MAX_ISO_DATA_IN_SKB,
+ csk->advmss);
+ max_num_pdu = max_iso_data / max_pdu_size;
+
+ num_pdu = (remaining_data_tosend +
+ tdata->max_xmit_dlength - 1) /
+ tdata->max_xmit_dlength;
+
+ if (num_pdu > max_num_pdu)
+ num_pdu = max_num_pdu;
+
+ conn->max_xmit_dlength = tdata->max_xmit_dlength * num_pdu;
+ max_txdata_len = conn->max_xmit_dlength;
+ iso_tx_rsvd = cdev->skb_iso_txhdr;
+ local_iso_info = sizeof(struct cxgbi_iso_info);
+
+ log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
+ "max_pdu_size %u, max_num_pdu %u, "
+ "max_txdata %u, num_pdu %u\n",
+ max_pdu_size, max_num_pdu,
+ max_txdata_len, num_pdu);
+ }
+no_iso:
+ count = min_t(u32, max_txdata_len, remaining_data_tosend);
+ err = cxgbi_task_data_sgl_read(task,
+ tdata->offset + tdata->count,
+ count, &dlimit);
+ if (unlikely(err < 0)) {
+ log_debug(1 << CXGBI_DBG_ISCSI,
+ "task 0x%p, tcp_task 0x%p, tdata 0x%p, "
+ "sgl err %d, count %u, dlimit %u\n",
+ task, tcp_task, tdata, err, count, dlimit);
+ if (dlimit) {
+ remaining_data_tosend =
+ rounddown(dlimit,
+ tdata->max_xmit_dlength);
+ if (!remaining_data_tosend)
+ remaining_data_tosend = dlimit;
+
+ dlimit = 0;
+
+ conn->max_xmit_dlength = remaining_data_tosend;
+ goto recalculate_sgl;
+ }
+
+ pr_err("task 0x%p, tcp_task 0x%p, tdata 0x%p, "
+ "sgl err %d\n",
+ task, tcp_task, tdata, err);
+ goto ret_err;
+ }
+
+ if ((tdata->flags & CXGBI_TASK_SGL_COPY) ||
+ (tdata->nr_frags > MAX_SKB_FRAGS))
+ headroom += conn->max_xmit_dlength;
+ }
+
+ tdata->skb = alloc_skb(local_iso_info + cdev->skb_tx_rsvd +
+ iso_tx_rsvd + headroom, GFP_ATOMIC);
if (!tdata->skb) {
- ndev->stats.tx_dropped++;
- return -ENOMEM;
+ tdata->count = last_tdata_count;
+ tdata->offset = last_tdata_offset;
+ err = -ENOMEM;
+ goto ret_err;
}
- skb_reserve(tdata->skb, cdev->skb_tx_rsvd);
+ skb_reserve(tdata->skb, local_iso_info + cdev->skb_tx_rsvd +
+ iso_tx_rsvd);
if (task->sc) {
task->hdr = (struct iscsi_hdr *)tdata->skb->data;
if (!task->hdr) {
__kfree_skb(tdata->skb);
tdata->skb = NULL;
- ndev->stats.tx_dropped++;
return -ENOMEM;
}
}
- task->hdr_max = SKB_TX_ISCSI_PDU_HEADER_MAX; /* BHS + AHS */
+
+ task->hdr_max = SKB_TX_ISCSI_PDU_HEADER_MAX;
+
+ if (iso_tx_rsvd)
+ cxgbi_skcb_set_flag(tdata->skb, SKCBF_TX_ISO);
/* data_out uses scsi_cmd's itt */
- if (opcode != ISCSI_OP_SCSI_DATA_OUT)
+ if (op != ISCSI_OP_SCSI_DATA_OUT)
task_reserve_itt(task, &task->hdr->itt);
log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
- "task 0x%p, op 0x%x, skb 0x%p,%u+%u/%u, itt 0x%x.\n",
- task, opcode, tdata->skb, cdev->skb_tx_rsvd, headroom,
- conn->max_xmit_dlength, ntohl(task->hdr->itt));
+ "task 0x%p, op 0x%x, skb 0x%p,%u+%u/%u, itt 0x%x.\n",
+ task, op, tdata->skb, cdev->skb_tx_rsvd, headroom,
+ conn->max_xmit_dlength, be32_to_cpu(task->hdr->itt));
return 0;
+
+ret_err:
+ conn->max_xmit_dlength = tdata->max_xmit_dlength;
+ return err;
}
EXPORT_SYMBOL_GPL(cxgbi_conn_alloc_pdu);
+static int
+cxgbi_prep_iso_info(struct iscsi_task *task, struct sk_buff *skb,
+ u32 count)
+{
+ struct cxgbi_iso_info *iso_info = (struct cxgbi_iso_info *)skb->head;
+ struct iscsi_r2t_info *r2t;
+ struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
+ struct iscsi_conn *conn = task->conn;
+ struct iscsi_session *session = conn->session;
+ struct iscsi_tcp_task *tcp_task = task->dd_data;
+ u32 burst_size = 0, r2t_dlength = 0, dlength;
+ u32 max_pdu_len = tdata->max_xmit_dlength;
+ u32 segment_offset = 0;
+ u32 num_pdu;
+
+ if (unlikely(!cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)))
+ return 0;
+
+ memset(iso_info, 0, sizeof(struct cxgbi_iso_info));
+
+ if (task->hdr->opcode == ISCSI_OP_SCSI_CMD && session->imm_data_en) {
+ iso_info->flags |= CXGBI_ISO_INFO_IMM_ENABLE;
+ burst_size = count;
+ }
+
+ dlength = ntoh24(task->hdr->dlength);
+ dlength = min(dlength, max_pdu_len);
+ hton24(task->hdr->dlength, dlength);
+
+ num_pdu = (count + max_pdu_len - 1) / max_pdu_len;
+
+ if (iscsi_task_has_unsol_data(task))
+ r2t = &task->unsol_r2t;
+ else
+ r2t = tcp_task->r2t;
+
+ if (r2t) {
+ log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
+ "count %u, tdata->count %u, num_pdu %u,"
+ "task->hdr_len %u, r2t->data_length %u, r2t->sent %u\n",
+ count, tdata->count, num_pdu, task->hdr_len,
+ r2t->data_length, r2t->sent);
+
+ r2t_dlength = r2t->data_length - r2t->sent;
+ segment_offset = r2t->sent;
+ r2t->datasn += num_pdu - 1;
+ }
+
+ if (!r2t || !r2t->sent)
+ iso_info->flags |= CXGBI_ISO_INFO_FSLICE;
+
+ if (task->hdr->flags & ISCSI_FLAG_CMD_FINAL)
+ iso_info->flags |= CXGBI_ISO_INFO_LSLICE;
+
+ task->hdr->flags &= ~ISCSI_FLAG_CMD_FINAL;
+
+ iso_info->op = task->hdr->opcode;
+ iso_info->ahs = task->hdr->hlength;
+ iso_info->num_pdu = num_pdu;
+ iso_info->mpdu = max_pdu_len;
+ iso_info->burst_size = (burst_size + r2t_dlength) >> 2;
+ iso_info->len = count + task->hdr_len;
+ iso_info->segment_offset = segment_offset;
+
+ cxgbi_skcb_tx_iscsi_hdrlen(skb) = task->hdr_len;
+ return 0;
+}
+
static inline void tx_skb_setmode(struct sk_buff *skb, int hcrc, int dcrc)
{
if (hcrc || dcrc) {
submode |= 1;
if (dcrc)
submode |= 2;
- cxgbi_skcb_ulp_mode(skb) = (ULP2_MODE_ISCSI << 4) | submode;
+ cxgbi_skcb_tx_ulp_mode(skb) = (ULP2_MODE_ISCSI << 4) | submode;
} else
- cxgbi_skcb_ulp_mode(skb) = 0;
+ cxgbi_skcb_tx_ulp_mode(skb) = 0;
}
+static struct page *rsvd_page;
+
int cxgbi_conn_init_pdu(struct iscsi_task *task, unsigned int offset,
unsigned int count)
{
struct iscsi_conn *conn = task->conn;
+ struct iscsi_tcp_task *tcp_task = task->dd_data;
struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
struct sk_buff *skb = tdata->skb;
- unsigned int datalen = count;
- int i, padlen = iscsi_padding(count);
+ struct scsi_cmnd *sc = task->sc;
+ u32 expected_count, expected_offset;
+ u32 datalen = count, dlimit = 0;
+ u32 i, padlen = iscsi_padding(count);
struct page *pg;
+ int err;
+
+ if (!tcp_task || !tdata || tcp_task->dd_data != tdata) {
+ pr_err("task 0x%p,0x%p, tcp_task 0x%p, tdata 0x%p/0x%p.\n",
+ task, task->sc, tcp_task,
+ tcp_task ? tcp_task->dd_data : NULL, tdata);
+ return -EINVAL;
+ }
log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
- "task 0x%p,0x%p, skb 0x%p, 0x%x,0x%x,0x%x, %u+%u.\n",
- task, task->sc, skb, (*skb->data) & ISCSI_OPCODE_MASK,
- ntohl(task->cmdsn), ntohl(task->hdr->itt), offset, count);
+ "task 0x%p,0x%p, skb 0x%p, 0x%x,0x%x,0x%x, %u+%u.\n",
+ task, task->sc, skb, (*skb->data) & ISCSI_OPCODE_MASK,
+ be32_to_cpu(task->cmdsn), be32_to_cpu(task->hdr->itt), offset, count);
skb_put(skb, task->hdr_len);
tx_skb_setmode(skb, conn->hdrdgst_en, datalen ? conn->datadgst_en : 0);
- if (!count)
+ if (!count) {
+ tdata->count = count;
+ tdata->offset = offset;
+ tdata->nr_frags = 0;
+ tdata->total_offset = 0;
+ tdata->total_count = 0;
+ if (tdata->max_xmit_dlength)
+ conn->max_xmit_dlength = tdata->max_xmit_dlength;
+ cxgbi_skcb_clear_flag(skb, SKCBF_TX_ISO);
return 0;
+ }
- if (task->sc) {
- struct scsi_data_buffer *sdb = &task->sc->sdb;
- struct scatterlist *sg = NULL;
- int err;
+ log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
+ "cxgbi_conn_init_pdu: tdata->total_count %u, "
+ "tdata->total_offset %u\n",
+ tdata->total_count, tdata->total_offset);
- tdata->offset = offset;
- tdata->count = count;
- err = sgl_seek_offset(
- sdb->table.sgl, sdb->table.nents,
- tdata->offset, &tdata->sgoffset, &sg);
- if (err < 0) {
- pr_warn("tpdu, sgl %u, bad offset %u/%u.\n",
- sdb->table.nents, tdata->offset, sdb->length);
- return err;
- }
- err = sgl_read_to_frags(sg, tdata->sgoffset, tdata->count,
- tdata->frags, MAX_PDU_FRAGS);
+ expected_count = tdata->total_count;
+ expected_offset = tdata->total_offset;
+
+ if ((count != expected_count) ||
+ (offset != expected_offset)) {
+ err = cxgbi_task_data_sgl_read(task, offset, count, &dlimit);
if (err < 0) {
- pr_warn("tpdu, sgl %u, bad offset %u + %u.\n",
- sdb->table.nents, tdata->offset, tdata->count);
+ pr_err("task 0x%p,0x%p, tcp_task 0x%p, tdata 0x%p/0x%p "
+ "dlimit %u, sgl err %d.\n", task, task->sc,
+ tcp_task, tcp_task ? tcp_task->dd_data : NULL,
+ tdata, dlimit, err);
return err;
}
- tdata->nr_frags = err;
+ }
+
+ /* Restore original value of conn->max_xmit_dlength because
+ * it can get updated to ISO data size.
+ */
+ conn->max_xmit_dlength = tdata->max_xmit_dlength;
+
+ if (sc) {
+ struct page_frag *frag = tdata->frags;
- if (tdata->nr_frags > MAX_SKB_FRAGS ||
- (padlen && tdata->nr_frags == MAX_SKB_FRAGS)) {
+ if ((tdata->flags & CXGBI_TASK_SGL_COPY) ||
+ (tdata->nr_frags > MAX_SKB_FRAGS) ||
+ (padlen && (tdata->nr_frags ==
+ MAX_SKB_FRAGS))) {
char *dst = skb->data + task->hdr_len;
- struct page_frag *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);
- memcpy(dst, src+frag->offset, frag->size);
+ memcpy(dst, src + frag->offset, frag->size);
dst += frag->size;
kunmap_atomic(src);
}
+
if (padlen) {
memset(dst, 0, padlen);
padlen = 0;
}
skb_put(skb, count + padlen);
} else {
- /* data fit into frag_list */
- for (i = 0; i < tdata->nr_frags; i++) {
- __skb_fill_page_desc(skb, i,
- tdata->frags[i].page,
- tdata->frags[i].offset,
- tdata->frags[i].size);
- skb_frag_ref(skb, i);
+ for (i = 0; i < tdata->nr_frags; i++, frag++) {
+ get_page(frag->page);
+ skb_fill_page_desc(skb, i, frag->page,
+ frag->offset, frag->size);
}
- 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);
-
+ pg = virt_to_head_page(task->data);
get_page(pg);
- skb_fill_page_desc(skb, 0, pg, offset_in_page(task->data),
- count);
+ skb_fill_page_desc(skb, 0, pg,
+ task->data - (char *)page_address(pg),
+ count);
skb->len += count;
skb->data_len += count;
skb->truesize += count;
}
if (padlen) {
- i = skb_shinfo(skb)->nr_frags;
+ get_page(rsvd_page);
skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
- virt_to_page(padding), offset_in_page(padding),
- padlen);
+ rsvd_page, 0, padlen);
skb->data_len += padlen;
skb->truesize += padlen;
skb->len += padlen;
}
+ if (likely(count > tdata->max_xmit_dlength))
+ cxgbi_prep_iso_info(task, skb, count);
+ else
+ cxgbi_skcb_clear_flag(skb, SKCBF_TX_ISO);
+
return 0;
}
EXPORT_SYMBOL_GPL(cxgbi_conn_init_pdu);
+static int cxgbi_sock_tx_queue_up(struct cxgbi_sock *csk, struct sk_buff *skb)
+{
+ struct cxgbi_device *cdev = csk->cdev;
+ struct cxgbi_iso_info *iso_cpl;
+ u32 frags = skb_shinfo(skb)->nr_frags;
+ u32 extra_len, num_pdu, hdr_len;
+ u32 iso_tx_rsvd = 0;
+
+ if (csk->state != CTP_ESTABLISHED) {
+ log_debug(1 << CXGBI_DBG_PDU_TX,
+ "csk 0x%p,%u,0x%lx,%u, EAGAIN.\n",
+ csk, csk->state, csk->flags, csk->tid);
+ return -EPIPE;
+ }
+
+ if (csk->err) {
+ log_debug(1 << CXGBI_DBG_PDU_TX,
+ "csk 0x%p,%u,0x%lx,%u, EPIPE %d.\n",
+ csk, csk->state, csk->flags, csk->tid, csk->err);
+ return -EPIPE;
+ }
+
+ if ((cdev->flags & CXGBI_FLAG_DEV_T3) &&
+ before((csk->snd_win + csk->snd_una), csk->write_seq)) {
+ log_debug(1 << CXGBI_DBG_PDU_TX,
+ "csk 0x%p,%u,0x%lx,%u, FULL %u-%u >= %u.\n",
+ csk, csk->state, csk->flags, csk->tid, csk->write_seq,
+ csk->snd_una, csk->snd_win);
+ return -ENOBUFS;
+ }
+
+ if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO))
+ iso_tx_rsvd = cdev->skb_iso_txhdr;
+
+ if (unlikely(skb_headroom(skb) < (cdev->skb_tx_rsvd + iso_tx_rsvd))) {
+ pr_err("csk 0x%p, skb head %u < %u.\n",
+ csk, skb_headroom(skb), cdev->skb_tx_rsvd);
+ return -EINVAL;
+ }
+
+ if (skb->len != skb->data_len)
+ frags++;
+
+ if (frags >= SKB_WR_LIST_SIZE) {
+ pr_err("csk 0x%p, frags %u, %u,%u >%lu.\n",
+ csk, skb_shinfo(skb)->nr_frags, skb->len,
+ skb->data_len, SKB_WR_LIST_SIZE);
+ return -EINVAL;
+ }
+
+ cxgbi_skcb_set_flag(skb, SKCBF_TX_NEED_HDR);
+ skb_reset_transport_header(skb);
+ cxgbi_sock_skb_entail(csk, skb);
+
+ extra_len = cxgbi_ulp_extra_len(cxgbi_skcb_tx_ulp_mode(skb));
+
+ if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO))) {
+ iso_cpl = (struct cxgbi_iso_info *)skb->head;
+ num_pdu = iso_cpl->num_pdu;
+ hdr_len = cxgbi_skcb_tx_iscsi_hdrlen(skb);
+ extra_len = (cxgbi_ulp_extra_len(cxgbi_skcb_tx_ulp_mode(skb)) *
+ num_pdu) + (hdr_len * (num_pdu - 1));
+ }
+
+ csk->write_seq += (skb->len + extra_len);
+
+ return 0;
+}
+
+static int cxgbi_sock_send_skb(struct cxgbi_sock *csk, struct sk_buff *skb)
+{
+ struct cxgbi_device *cdev = csk->cdev;
+ int len = skb->len;
+ int err;
+
+ spin_lock_bh(&csk->lock);
+ err = cxgbi_sock_tx_queue_up(csk, skb);
+ if (err < 0) {
+ spin_unlock_bh(&csk->lock);
+ return err;
+ }
+
+ if (likely(skb_queue_len(&csk->write_queue)))
+ cdev->csk_push_tx_frames(csk, 0);
+ spin_unlock_bh(&csk->lock);
+ return len;
+}
+
int cxgbi_conn_xmit_pdu(struct iscsi_task *task)
{
struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
struct cxgbi_conn *cconn = tcp_conn->dd_data;
+ struct iscsi_tcp_task *tcp_task = task->dd_data;
struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo;
struct sk_buff *skb = tdata->skb;
struct cxgbi_sock *csk = NULL;
- unsigned int datalen;
+ u32 pdulen = 0;
+ u32 datalen;
int err;
+ if (!tcp_task || !tdata || (tcp_task->dd_data != tdata)) {
+ pr_err("task 0x%p,0x%p, tcp_task 0x%p, tdata 0x%p/0x%p.\n",
+ task, task->sc, tcp_task,
+ tcp_task ? tcp_task->dd_data : NULL, tdata);
+ return -EINVAL;
+ }
+
if (!skb) {
log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
- "task 0x%p\n", task);
+ "task 0x%p, skb NULL.\n", task);
return 0;
}
if (cconn && cconn->cep)
csk = cconn->cep->csk;
+
if (!csk) {
log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
"task 0x%p, csk gone.\n", task);
if (!task->sc)
memcpy(skb->data, task->hdr, SKB_TX_ISCSI_PDU_HEADER_MAX);
- err = cxgbi_sock_send_pdus(cconn->cep->csk, skb);
+ err = cxgbi_sock_send_skb(csk, skb);
if (err > 0) {
- int pdulen = err;
+ pdulen += err;
- log_debug(1 << CXGBI_DBG_PDU_TX,
- "task 0x%p,0x%p, skb 0x%p, len %u/%u, rv %d.\n",
- task, task->sc, skb, skb->len, skb->data_len, err);
+ log_debug(1 << CXGBI_DBG_PDU_TX, "task 0x%p,0x%p, rv %d.\n",
+ task, task->sc, err);
if (task->conn->hdrdgst_en)
pdulen += ISCSI_DIGEST_SIZE;
pdulen += ISCSI_DIGEST_SIZE;
task->conn->txdata_octets += pdulen;
+
+ if (unlikely(cxgbi_is_iso_config(csk) && cxgbi_is_iso_disabled(csk))) {
+ if (time_after(jiffies, csk->prev_iso_ts + HZ)) {
+ csk->disable_iso = false;
+ csk->prev_iso_ts = 0;
+ log_debug(1 << CXGBI_DBG_PDU_TX,
+ "enable iso: csk 0x%p\n", csk);
+ }
+ }
+
return 0;
}
if (err == -EAGAIN || err == -ENOBUFS) {
log_debug(1 << CXGBI_DBG_PDU_TX,
- "task 0x%p, skb 0x%p, len %u/%u, %d EAGAIN.\n",
- task, skb, skb->len, skb->data_len, err);
+ "task 0x%p, skb 0x%p, len %u/%u, %d EAGAIN.\n",
+ task, skb, skb->len, skb->data_len, err);
/* reset skb to send when we are called again */
tdata->skb = skb;
+
+ if (cxgbi_is_iso_config(csk) && !cxgbi_is_iso_disabled(csk) &&
+ (csk->no_tx_credits++ >= 2)) {
+ csk->disable_iso = true;
+ csk->prev_iso_ts = jiffies;
+ log_debug(1 << CXGBI_DBG_PDU_TX,
+ "disable iso:csk 0x%p, ts:%lu\n",
+ csk, csk->prev_iso_ts);
+ }
+
return err;
}
- log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
- "itt 0x%x, skb 0x%p, len %u/%u, xmit err %d.\n",
- task->itt, skb, skb->len, skb->data_len, err);
-
__kfree_skb(skb);
-
+ log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
+ "itt 0x%x, skb 0x%p, len %u/%u, xmit err %d.\n",
+ task->itt, skb, skb->len, skb->data_len, err);
iscsi_conn_printk(KERN_ERR, task->conn, "xmit err %d.\n", err);
iscsi_conn_failure(task->conn, ISCSI_ERR_XMIT_FAILED);
return err;
BUILD_BUG_ON(sizeof_field(struct sk_buff, cb) <
sizeof(struct cxgbi_skb_cb));
+ rsvd_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+ if (!rsvd_page)
+ return -ENOMEM;
+
return 0;
}
static void __exit libcxgbi_exit_module(void)
{
cxgbi_device_unregister_all(0xFF);
+ put_page(rsvd_page);
return;
}
projects / platform / kernel / linux-rpi.git / commitdiff