qlge: Add support for getting/setting port config.

This patch adds functionality to get and set port parameters.
Currently it is used to set maximum TX/RX frame sizes. This process is
also capable of setting:
1) Pause type: Standard or Priority based.
2) Loop back mode.
3) Enable Jumbo frame mode (included here...)

Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 228 insertions, 1 deletions

diff --git a/drivers/net/qlge/qlge.h b/drivers/net/qlge/qlge.h
index 5f60ec4efb3c..6f9fd24bf384 100644
--- a/drivers/net/qlge/qlge.h
+++ b/drivers/net/qlge/qlge.h
@@ -1450,6 +1450,7 @@ struct ql_adapter {
 
         u32 mailbox_in;
         u32 mailbox_out;
+        struct mbox_params idc_mbc;
         struct mutex    mpi_mutex;
 
         int tx_ring_size;
@@ -1486,6 +1487,8 @@ struct ql_adapter {
         u32 port_link_up;
         u32 port_init;
         u32 link_status;
+        u32 link_config;
+        u32 max_frame_size;
 
         union flash_params flash;
 
@@ -1495,6 +1498,8 @@ struct ql_adapter {
         struct delayed_work asic_reset_work;
         struct delayed_work mpi_reset_work;
         struct delayed_work mpi_work;
+        struct delayed_work mpi_port_cfg_work;
+        struct completion ide_completion;
         struct nic_operations *nic_ops;
         u16 device_id;
 };
@@ -1569,6 +1574,7 @@ void ql_queue_asic_error(struct ql_adapter *qdev);
 u32 ql_enable_completion_interrupt(struct ql_adapter *qdev, u32 intr);
 void ql_set_ethtool_ops(struct net_device *ndev);
 int ql_read_xgmac_reg64(struct ql_adapter *qdev, u32 reg, u64 *data);
+void ql_mpi_port_cfg_work(struct work_struct *work);
 int ql_mb_get_fw_state(struct ql_adapter *qdev);
 
 #if 1
diff --git a/drivers/net/qlge/qlge_main.c b/drivers/net/qlge/qlge_main.c
index 29334d99b430..7c1ce5765759 100644
--- a/drivers/net/qlge/qlge_main.c
+++ b/drivers/net/qlge/qlge_main.c
@@ -837,7 +837,14 @@ exit:
 
 static int ql_8000_port_initialize(struct ql_adapter *qdev)
 {
-        return ql_mb_get_fw_state(qdev);
+        int status;
+        status = ql_mb_get_fw_state(qdev);
+        if (status)
+                goto exit;
+        /* Wake up a worker to get/set the TX/RX frame sizes. */
+        queue_delayed_work(qdev->workqueue, &qdev->mpi_port_cfg_work, 0);
+exit:
+        return status;
 }
 
 /* Take the MAC Core out of reset.
@@ -3188,6 +3195,7 @@ static int ql_adapter_down(struct ql_adapter *qdev)
                 cancel_delayed_work_sync(&qdev->asic_reset_work);
         cancel_delayed_work_sync(&qdev->mpi_reset_work);
         cancel_delayed_work_sync(&qdev->mpi_work);
+        cancel_delayed_work_sync(&qdev->mpi_port_cfg_work);
 
         /* The default queue at index 0 is always processed in
          * a workqueue.
@@ -3462,6 +3470,8 @@ static int qlge_change_mtu(struct net_device *ndev, int new_mtu)
 
         if (ndev->mtu == 1500 && new_mtu == 9000) {
                 QPRINTK(qdev, IFUP, ERR, "Changing to jumbo MTU.\n");
+                queue_delayed_work(qdev->workqueue,
+                                &qdev->mpi_port_cfg_work, 0);
         } else if (ndev->mtu == 9000 && new_mtu == 1500) {
                 QPRINTK(qdev, IFUP, ERR, "Changing to normal MTU.\n");
         } else if ((ndev->mtu == 1500 && new_mtu == 1500) ||
@@ -3771,7 +3781,9 @@ static int __devinit ql_init_device(struct pci_dev *pdev,
         INIT_DELAYED_WORK(&qdev->asic_reset_work, ql_asic_reset_work);
         INIT_DELAYED_WORK(&qdev->mpi_reset_work, ql_mpi_reset_work);
         INIT_DELAYED_WORK(&qdev->mpi_work, ql_mpi_work);
+        INIT_DELAYED_WORK(&qdev->mpi_port_cfg_work, ql_mpi_port_cfg_work);
         mutex_init(&qdev->mpi_mutex);
+        init_completion(&qdev->ide_completion);
 
         if (!cards_found) {
                 dev_info(&pdev->dev, "%s\n", DRV_STRING);
diff --git a/drivers/net/qlge/qlge_mpi.c b/drivers/net/qlge/qlge_mpi.c
index 11102bec36b2..ef610c674dfb 100644
--- a/drivers/net/qlge/qlge_mpi.c
+++ b/drivers/net/qlge/qlge_mpi.c
@@ -138,6 +138,27 @@ end:
         return status;
 }
 
+/* Process an inter-device event completion.
+ * If good, signal the caller's completion.
+ */
+static int ql_idc_cmplt_aen(struct ql_adapter *qdev)
+{
+        int status;
+        struct mbox_params *mbcp = &qdev->idc_mbc;
+        mbcp->out_count = 4;
+        status = ql_get_mb_sts(qdev, mbcp);
+        if (status) {
+                QPRINTK(qdev, DRV, ERR,
+                        "Could not read MPI, resetting RISC!\n");
+                ql_queue_fw_error(qdev);
+        } else
+                /* Wake up the sleeping mpi_idc_work thread that is
+                 * waiting for this event.
+                 */
+                complete(&qdev->ide_completion);
+
+        return status;
+}
 static void ql_link_up(struct ql_adapter *qdev, struct mbox_params *mbcp)
 {
         mbcp->out_count = 2;
@@ -241,6 +262,16 @@ static int ql_mpi_handler(struct ql_adapter *qdev, struct mbox_params *mbcp)
                 status = ql_get_mb_sts(qdev, mbcp);
                 return status;
 
+        /* Process and inbound IDC event.
+         * This will happen when we're trying to
+         * change tx/rx max frame size, change pause
+         * paramters or loopback mode.
+         */
+        case AEN_IDC_CMPLT:
+        case AEN_IDC_EXT:
+                status = ql_idc_cmplt_aen(qdev);
+                break;
+
         case AEN_LINK_UP:
                 ql_link_up(qdev, mbcp);
                 break;
@@ -391,6 +422,182 @@ int ql_mb_get_fw_state(struct ql_adapter *qdev)
         return status;
 }
 
+/* Get link settings and maximum frame size settings
+ * for the current port.
+ * Most likely will block.
+ */
+static int ql_mb_set_port_cfg(struct ql_adapter *qdev)
+{
+        struct mbox_params mbc;
+        struct mbox_params *mbcp = &mbc;
+        int status = 0;
+
+        memset(mbcp, 0, sizeof(struct mbox_params));
+
+        mbcp->in_count = 3;
+        mbcp->out_count = 1;
+
+        mbcp->mbox_in[0] = MB_CMD_SET_PORT_CFG;
+        mbcp->mbox_in[1] = qdev->link_config;
+        mbcp->mbox_in[2] = qdev->max_frame_size;
+
+
+        status = ql_mailbox_command(qdev, mbcp);
+        if (status)
+                return status;
+
+        if (mbcp->mbox_out[0] == MB_CMD_STS_INTRMDT) {
+                QPRINTK(qdev, DRV, ERR,
+                        "Port Config sent, wait for IDC.\n");
+        } else  if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
+                QPRINTK(qdev, DRV, ERR,
+                        "Failed Set Port Configuration.\n");
+                status = -EIO;
+        }
+        return status;
+}
+
+/* Get link settings and maximum frame size settings
+ * for the current port.
+ * Most likely will block.
+ */
+static int ql_mb_get_port_cfg(struct ql_adapter *qdev)
+{
+        struct mbox_params mbc;
+        struct mbox_params *mbcp = &mbc;
+        int status = 0;
+
+        memset(mbcp, 0, sizeof(struct mbox_params));
+
+        mbcp->in_count = 1;
+        mbcp->out_count = 3;
+
+        mbcp->mbox_in[0] = MB_CMD_GET_PORT_CFG;
+
+        status = ql_mailbox_command(qdev, mbcp);
+        if (status)
+                return status;
+
+        if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
+                QPRINTK(qdev, DRV, ERR,
+                        "Failed Get Port Configuration.\n");
+                status = -EIO;
+        } else  {
+                QPRINTK(qdev, DRV, DEBUG,
+                        "Passed Get Port Configuration.\n");
+                qdev->link_config = mbcp->mbox_out[1];
+                qdev->max_frame_size = mbcp->mbox_out[2];
+        }
+        return status;
+}
+
+/* IDC - Inter Device Communication...
+ * Some firmware commands require consent of adjacent FCOE
+ * function.  This function waits for the OK, or a
+ * counter-request for a little more time.i
+ * The firmware will complete the request if the other
+ * function doesn't respond.
+ */
+static int ql_idc_wait(struct ql_adapter *qdev)
+{
+        int status = -ETIMEDOUT;
+        long wait_time = 1 * HZ;
+        struct mbox_params *mbcp = &qdev->idc_mbc;
+        do {
+                /* Wait here for the command to complete
+                 * via the IDC process.
+                 */
+                wait_time =
+                        wait_for_completion_timeout(&qdev->ide_completion,
+                                                        wait_time);
+                if (!wait_time) {
+                        QPRINTK(qdev, DRV, ERR,
+                                "IDC Timeout.\n");
+                        break;
+                }
+                /* Now examine the response from the IDC process.
+                 * We might have a good completion or a request for
+                 * more wait time.
+                 */
+                if (mbcp->mbox_out[0] == AEN_IDC_EXT) {
+                        QPRINTK(qdev, DRV, ERR,
+                                "IDC Time Extension from function.\n");
+                        wait_time += (mbcp->mbox_out[1] >> 8) & 0x0000000f;
+                } else if (mbcp->mbox_out[0] == AEN_IDC_CMPLT) {
+                        QPRINTK(qdev, DRV, ERR,
+                                "IDC Success.\n");
+                        status = 0;
+                        break;
+                } else {
+                        QPRINTK(qdev, DRV, ERR,
+                                "IDC: Invalid State 0x%.04x.\n",
+                                mbcp->mbox_out[0]);
+                        status = -EIO;
+                        break;
+                }
+        } while (wait_time);
+
+        return status;
+}
+
+/* API called in work thread context to set new TX/RX
+ * maximum frame size values to match MTU.
+ */
+static int ql_set_port_cfg(struct ql_adapter *qdev)
+{
+        int status;
+        status = ql_mb_set_port_cfg(qdev);
+        if (status)
+                return status;
+        status = ql_idc_wait(qdev);
+        return status;
+}
+
+/* The following routines are worker threads that process
+ * events that may sleep waiting for completion.
+ */
+
+/* This thread gets the maximum TX and RX frame size values
+ * from the firmware and, if necessary, changes them to match
+ * the MTU setting.
+ */
+void ql_mpi_port_cfg_work(struct work_struct *work)
+{
+        struct ql_adapter *qdev =
+            container_of(work, struct ql_adapter, mpi_port_cfg_work.work);
+        struct net_device *ndev = qdev->ndev;
+        int status;
+
+        status = ql_mb_get_port_cfg(qdev);
+        if (status) {
+                QPRINTK(qdev, DRV, ERR,
+                        "Bug: Failed to get port config data.\n");
+                goto err;
+        }
+
+        if (ndev->mtu <= 2500)
+                goto end;
+        else if (qdev->link_config & CFG_JUMBO_FRAME_SIZE &&
+                        qdev->max_frame_size ==
+                        CFG_DEFAULT_MAX_FRAME_SIZE)
+                goto end;
+
+        qdev->link_config |=    CFG_JUMBO_FRAME_SIZE;
+        qdev->max_frame_size = CFG_DEFAULT_MAX_FRAME_SIZE;
+        status = ql_set_port_cfg(qdev);
+        if (status) {
+                QPRINTK(qdev, DRV, ERR,
+                        "Bug: Failed to set port config data.\n");
+                goto err;
+        }
+end:
+        clear_bit(QL_PORT_CFG, &qdev->flags);
+        return;
+err:
+        ql_queue_fw_error(qdev);
+        goto end;
+}
+
 void ql_mpi_work(struct work_struct *work)
 {
         struct ql_adapter *qdev =
@@ -414,5 +621,7 @@ void ql_mpi_reset_work(struct work_struct *work)
 {
         struct ql_adapter *qdev =
             container_of(work, struct ql_adapter, mpi_reset_work.work);
+        cancel_delayed_work_sync(&qdev->mpi_work);
+        cancel_delayed_work_sync(&qdev->mpi_port_cfg_work);
         ql_soft_reset_mpi_risc(qdev);
 }