void
cxgbit_get_r2t_ttt(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
struct iscsi_r2t *r2t)
{
struct cxgbit_sock *csk = conn->context;
struct cxgbit_device *cdev = csk->com.cdev;
struct cxgbit_cmd *ccmd = iscsit_priv_cmd(cmd);
struct cxgbi_task_tag_info *ttinfo = &ccmd->ttinfo;
int ret = -EINVAL;
if ((!ccmd->setup_ddp) ||
(!test_bit(CSK_DDP_ENABLE, &csk->com.flags)))
goto out;
ccmd->setup_ddp = false;
ttinfo->sgl = cmd->se_cmd.t_data_sg;
ttinfo->nents = cmd->se_cmd.t_data_nents;
ret = cxgbit_ddp_reserve(csk, ttinfo, cmd->se_cmd.data_length);
if (ret < 0) {
pr_debug("csk 0x%p, cmd 0x%p, xfer len %u, sgcnt %u no ddp.\n",
csk, cmd, cmd->se_cmd.data_length, ttinfo->nents);
ttinfo->sgl = NULL;
ttinfo->nents = 0;
} else {
ccmd->release = true;
}
out:
pr_debug("cdev 0x%p, cmd 0x%p, tag 0x%x\n", cdev, cmd, ttinfo->tag);
r2t->targ_xfer_tag = ttinfo->tag;
}
void cxgbit_unmap_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
{
struct cxgbit_cmd *ccmd = iscsit_priv_cmd(cmd);
if (ccmd->release) {
struct cxgbi_task_tag_info *ttinfo = &ccmd->ttinfo;
if (ttinfo->sgl) {
struct cxgbit_sock *csk = conn->context;
struct cxgbit_device *cdev = csk->com.cdev;
struct cxgbi_ppm *ppm = cdev2ppm(cdev);
/* Abort the TCP conn if DDP is not complete to
* avoid any possibility of DDP after freeing
* the cmd.
*/
if (unlikely(cmd->write_data_done !=
cmd->se_cmd.data_length))
cxgbit_abort_conn(csk);
cxgbi_ppm_ppod_release(ppm, ttinfo->idx);
dma_unmap_sg(&ppm->pdev->dev, ttinfo->sgl,
ttinfo->nents, DMA_FROM_DEVICE);
} else {
put_page(sg_page(&ccmd->sg));
}
ccmd->release = false;
}
}
void cxgbit_release_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
{
struct cxgbit_cmd *ccmd = iscsit_priv_cmd(cmd);
if (ccmd->release) {
struct cxgbi_task_tag_info *ttinfo = &ccmd->ttinfo;
if (ttinfo->sgl) {
struct cxgbit_sock *csk = conn->context;
struct cxgbit_device *cdev = csk->com.cdev;
struct cxgbi_ppm *ppm = cdev2ppm(cdev);
cxgbi_ppm_ppod_release(ppm, ttinfo->idx);
dma_unmap_sg(&ppm->pdev->dev, ttinfo->sgl,
ttinfo->nents, DMA_FROM_DEVICE);
} else {
put_page(sg_page(&ccmd->sg));
}
ccmd->release = false;
}
}
