qla2xxx: Enable Extended Logins support

This patch enables Extended Logins support in Qlogic ISP.
To enable extended login with Qlogic ISP24XX/25XX/26XX,
set module parameter ql2xexlogins to any non-zero number.
This will alow ISP firmware to store port database structure
information of remote login sessions to host memory provided
by driver. ISP firmware supports upto 16k total logins.

Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 76 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index bfa9a64c316b..3c4af7e10550 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -221,6 +221,12 @@ MODULE_PARM_DESC(ql2xmdenable,
 		"0 - MiniDump disabled. "
 		"1 (Default) - MiniDump enabled.");
 
+int ql2xexlogins = 0;
+module_param(ql2xexlogins, uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(ql2xexlogins,
+		 "Number of extended Logins. "
+		 "0 (Default)- Disabled.");
+
 /*
  * SCSI host template entry points
  */
@@ -3128,6 +3134,10 @@ qla2x00_remove_one(struct pci_dev *pdev)
 
 	base_vha->flags.online = 0;
 
+	/* free DMA memory */
+	if (ha->exlogin_buf)
+		qla2x00_free_exlogin_buffer(ha);
+
 	qla2x00_destroy_deferred_work(ha);
 
 	qlt_remove_target(ha, base_vha);
@@ -3587,6 +3597,72 @@ fail:
 	return -ENOMEM;
 }
 
+int
+qla2x00_set_exlogins_buffer(scsi_qla_host_t *vha)
+{
+	int rval;
+	uint16_t	size, max_cnt, temp;
+	struct qla_hw_data *ha = vha->hw;
+
+	/* Return if we don't need to alloacate any extended logins */
+	if (!ql2xexlogins)
+		return QLA_SUCCESS;
+
+	ql_log(ql_log_info, vha, 0xd021, "EXLOGIN count: %d.\n", ql2xexlogins);
+	max_cnt = 0;
+	rval = qla_get_exlogin_status(vha, &size, &max_cnt);
+	if (rval != QLA_SUCCESS) {
+		ql_log_pci(ql_log_fatal, ha->pdev, 0xd029,
+		    "Failed to get exlogin status.\n");
+		return rval;
+	}
+
+	temp = (ql2xexlogins > max_cnt) ? max_cnt : ql2xexlogins;
+	ha->exlogin_size = (size * temp);
+	ql_log(ql_log_info, vha, 0xd024,
+		"EXLOGIN: max_logins=%d, portdb=0x%x, total=%d.\n",
+		max_cnt, size, temp);
+
+	ql_log(ql_log_info, vha, 0xd025, "EXLOGIN: requested size=0x%x\n",
+		ha->exlogin_size);
+
+	/* Get consistent memory for extended logins */
+	ha->exlogin_buf = dma_alloc_coherent(&ha->pdev->dev,
+	    ha->exlogin_size, &ha->exlogin_buf_dma, GFP_KERNEL);
+	if (!ha->exlogin_buf) {
+		ql_log_pci(ql_log_fatal, ha->pdev, 0xd02a,
+		    "Failed to allocate memory for exlogin_buf_dma.\n");
+		return -ENOMEM;
+	}
+
+	/* Now configure the dma buffer */
+	rval = qla_set_exlogin_mem_cfg(vha, ha->exlogin_buf_dma);
+	if (rval) {
+		ql_log(ql_log_fatal, vha, 0x00cf,
+		    "Setup extended login buffer  ****FAILED****.\n");
+		qla2x00_free_exlogin_buffer(ha);
+	}
+
+	return rval;
+}
+
+/*
+* qla2x00_free_exlogin_buffer
+*
+* Input:
+*	ha = adapter block pointer
+*/
+void
+qla2x00_free_exlogin_buffer(struct qla_hw_data *ha)
+{
+	if (ha->exlogin_buf) {
+		dma_free_coherent(&ha->pdev->dev, ha->exlogin_size,
+		    ha->exlogin_buf, ha->exlogin_buf_dma);
+		ha->exlogin_buf = NULL;
+		ha->exlogin_size = 0;
+	}
+}
+
 /*
 * qla2x00_free_fw_dump
 *	Frees fw dump stuff.