qed: add support for dcbx.

This patch adds the necessary driver support for Management Firmware to
configure the device/firmware with the dcbx results. Management Firmware
is responsible for communicating the DCBX and driving the negotiation,
but the driver has responsibility of receiving async notification and
configuring the results in hw/fw. This patch also adds the dcbx support for
future protocols (e.g., FCoE) as preparation to their imminent submission.

Signed-off-by: Sudarsana Reddy Kalluru <sudarsana.kalluru@qlogic.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 100 insertions, 5 deletions

diff --git a/drivers/net/ethernet/qlogic/qed/qed_dev.c b/drivers/net/ethernet/qlogic/qed/qed_dev.c
index 6fb6016409c6..089016f46f26 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_dev.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dev.c
@@ -22,6 +22,7 @@
 #include <linux/qed/qed_if.h>
 #include "qed.h"
 #include "qed_cxt.h"
+#include "qed_dcbx.h"
 #include "qed_dev_api.h"
 #include "qed_hsi.h"
 #include "qed_hw.h"
@@ -33,6 +34,9 @@
 #include "qed_sriov.h"
 #include "qed_vf.h"
 
+static spinlock_t qm_lock;
+static bool qm_lock_init = false;
+
 /* API common to all protocols */
 enum BAR_ID {
 	BAR_ID_0,       /* used for GRC */
@@ -147,6 +151,7 @@ void qed_resc_free(struct qed_dev *cdev)
 		qed_int_free(p_hwfn);
 		qed_iov_free(p_hwfn);
 		qed_dmae_info_free(p_hwfn);
+		qed_dcbx_info_free(p_hwfn, p_hwfn->p_dcbx_info);
 	}
 }
 
@@ -200,13 +205,19 @@ static int qed_init_qm_info(struct qed_hwfn *p_hwfn)
 	vport_id = (u8)RESC_START(p_hwfn, QED_VPORT);
 
 	/* First init per-TC PQs */
-	for (i = 0; i < multi_cos_tcs; i++, curr_queue++) {
+	for (i = 0; i < multi_cos_tcs; i++) {
 		struct init_qm_pq_params *params =
-		    &qm_info->qm_pq_params[curr_queue];
+		    &qm_info->qm_pq_params[curr_queue++];
 
-		params->vport_id = vport_id;
-		params->tc_id = p_hwfn->hw_info.non_offload_tc;
-		params->wrr_group = 1;
+		if (p_hwfn->hw_info.personality == QED_PCI_ETH) {
+			params->vport_id = vport_id;
+			params->tc_id = p_hwfn->hw_info.non_offload_tc;
+			params->wrr_group = 1;
+		} else {
+			params->vport_id = vport_id;
+			params->tc_id = p_hwfn->hw_info.offload_tc;
+			params->wrr_group = 1;
+		}
 	}
 
 	/* Then init pure-LB PQ */
@@ -266,6 +277,63 @@ alloc_err:
 	return -ENOMEM;
 }
 
+/* This function reconfigures the QM pf on the fly.
+ * For this purpose we:
+ * 1. reconfigure the QM database
+ * 2. set new values to runtime arrat
+ * 3. send an sdm_qm_cmd through the rbc interface to stop the QM
+ * 4. activate init tool in QM_PF stage
+ * 5. send an sdm_qm_cmd through rbc interface to release the QM
+ */
+int qed_qm_reconf(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
+{
+	struct qed_qm_info *qm_info = &p_hwfn->qm_info;
+	bool b_rc;
+	int rc;
+
+	/* qm_info is allocated in qed_init_qm_info() which is already called
+	 * from qed_resc_alloc() or previous call of qed_qm_reconf().
+	 * The allocated size may change each init, so we free it before next
+	 * allocation.
+	 */
+	qed_qm_info_free(p_hwfn);
+
+	/* initialize qed's qm data structure */
+	rc = qed_init_qm_info(p_hwfn);
+	if (rc)
+		return rc;
+
+	/* stop PF's qm queues */
+	spin_lock_bh(&qm_lock);
+	b_rc = qed_send_qm_stop_cmd(p_hwfn, p_ptt, false, true,
+				    qm_info->start_pq, qm_info->num_pqs);
+	spin_unlock_bh(&qm_lock);
+	if (!b_rc)
+		return -EINVAL;
+
+	/* clear the QM_PF runtime phase leftovers from previous init */
+	qed_init_clear_rt_data(p_hwfn);
+
+	/* prepare QM portion of runtime array */
+	qed_qm_init_pf(p_hwfn);
+
+	/* activate init tool on runtime array */
+	rc = qed_init_run(p_hwfn, p_ptt, PHASE_QM_PF, p_hwfn->rel_pf_id,
+			  p_hwfn->hw_info.hw_mode);
+	if (rc)
+		return rc;
+
+	/* start PF's qm queues */
+	spin_lock_bh(&qm_lock);
+	b_rc = qed_send_qm_stop_cmd(p_hwfn, p_ptt, true, true,
+				    qm_info->start_pq, qm_info->num_pqs);
+	spin_unlock_bh(&qm_lock);
+	if (!b_rc)
+		return -EINVAL;
+
+	return 0;
+}
+
 int qed_resc_alloc(struct qed_dev *cdev)
 {
 	struct qed_consq *p_consq;
@@ -375,6 +443,14 @@ int qed_resc_alloc(struct qed_dev *cdev)
 				  "Failed to allocate memory for dmae_info structure\n");
 			goto alloc_err;
 		}
+
+		/* DCBX initialization */
+		rc = qed_dcbx_info_alloc(p_hwfn);
+		if (rc) {
+			DP_NOTICE(p_hwfn,
+				  "Failed to allocate memory for dcbx structure\n");
+			goto alloc_err;
+		}
 	}
 
 	cdev->reset_stats = kzalloc(sizeof(*cdev->reset_stats), GFP_KERNEL);
@@ -780,6 +856,11 @@ int qed_hw_init(struct qed_dev *cdev,
 		p_hwfn->first_on_engine = (load_code ==
 					   FW_MSG_CODE_DRV_LOAD_ENGINE);
 
+		if (!qm_lock_init) {
+			spin_lock_init(&qm_lock);
+			qm_lock_init = true;
+		}
+
 		switch (load_code) {
 		case FW_MSG_CODE_DRV_LOAD_ENGINE:
 			rc = qed_hw_init_common(p_hwfn, p_hwfn->p_main_ptt,
@@ -821,6 +902,20 @@ int qed_hw_init(struct qed_dev *cdev,
 			return mfw_rc;
 		}
 
+		/* send DCBX attention request command */
+		DP_VERBOSE(p_hwfn,
+			   QED_MSG_DCB,
+			   "sending phony dcbx set command to trigger DCBx attention handling\n");
+		mfw_rc = qed_mcp_cmd(p_hwfn, p_hwfn->p_main_ptt,
+				     DRV_MSG_CODE_SET_DCBX,
+				     1 << DRV_MB_PARAM_DCBX_NOTIFY_SHIFT,
+				     &load_code, &param);
+		if (mfw_rc) {
+			DP_NOTICE(p_hwfn,
+				  "Failed to send DCBX attention request\n");
+			return mfw_rc;
+		}
+
 		p_hwfn->hw_init_done = true;
 	}