[PATCH v2 7/9] qedi: add module param to set ping packet size

[Nilesh Javali]

Default packet size is 0x400.
For jumbo packets set to 0x2400.

Signed-off-by: Nilesh Javali <nilesh.jav...@cavium.com>
---
 drivers/scsi/qedi/qedi.h      |  1 -
 drivers/scsi/qedi/qedi_main.c | 13 +++++++++----
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/qedi/qedi.h b/drivers/scsi/qedi/qedi.h
index 6fa02c5..a26bb506 100644
--- a/drivers/scsi/qedi/qedi.h
+++ b/drivers/scsi/qedi/qedi.h
@@ -63,7 +63,6 @@
 #define QEDI_LOCAL_PORT_INVALID        0xffff
 #define TX_RX_RING             16
 #define RX_RING                        (TX_RX_RING - 1)
-#define LL2_SINGLE_BUF_SIZE    0x400
 #define QEDI_PAGE_ALIGN(addr)  ALIGN(addr, QEDI_PAGE_SIZE)
 #define QEDI_PAGE_MASK         (~((QEDI_PAGE_SIZE) - 1))
 
diff --git a/drivers/scsi/qedi/qedi_main.c b/drivers/scsi/qedi/qedi_main.c
index 2621dee..8942f62 100644
--- a/drivers/scsi/qedi/qedi_main.c
+++ b/drivers/scsi/qedi/qedi_main.c
@@ -44,6 +44,11 @@
 MODULE_PARM_DESC(qedi_io_tracing,
                 " Enable logging of SCSI requests/completions into trace 
buffer. (default off).");
 
+uint qedi_ll2_buf_size = 0x400;
+module_param(qedi_ll2_buf_size, uint, 0644);
+MODULE_PARM_DESC(qedi_ll2_buf_size,
+                "parameter to set ping packet size, default - 0x400, Jumbo 
packets - 0x2400.");
+
 const struct qed_iscsi_ops *qedi_ops;
 static struct scsi_transport_template *qedi_scsi_transport;
 static struct pci_driver qedi_pci_driver;
@@ -228,7 +233,7 @@ static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
        }
 
        /* Allocating memory for Tx/Rx pkt buffer */
-       udev->ll2_buf_size = TX_RX_RING * LL2_SINGLE_BUF_SIZE;
+       udev->ll2_buf_size = TX_RX_RING * qedi_ll2_buf_size;
        udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
        udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
                                                 __GFP_ZERO, 2);
@@ -283,7 +288,7 @@ static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
        qedi->udev = udev;
 
        udev->tx_pkt = udev->ll2_buf;
-       udev->rx_pkt = udev->ll2_buf + LL2_SINGLE_BUF_SIZE;
+       udev->rx_pkt = udev->ll2_buf + qedi_ll2_buf_size;
        return 0;
 
  err_uctrl:
@@ -752,8 +757,8 @@ static int qedi_ll2_process_skb(struct qedi_ctx *qedi, 
struct sk_buff *skb,
 
        udev = qedi->udev;
        uctrl = udev->uctrl;
-       pkt = udev->rx_pkt + (uctrl->hw_rx_prod * LL2_SINGLE_BUF_SIZE);
-       len = min_t(u32, skb->len, (u32)LL2_SINGLE_BUF_SIZE);
+       pkt = udev->rx_pkt + (uctrl->hw_rx_prod * qedi_ll2_buf_size);
+       len = min_t(u32, skb->len, (u32)qedi_ll2_buf_size);
        memcpy(pkt, skb->data, len);
 
        memset(&rxbd, 0, sizeof(rxbd));
-- 
1.8.3.1