Subject: [net-next-2.6 PATCH 06/23] igb: rework use of VMOLR in regards to PF and VFs

From: Jeff Kirsher <[email-masked]>
Date: Wed, 28 Oct 2009 02:47:16 -0700

From: Alexander Duyck <[email-masked]>

This patch updates the use of the VMOLR to include enabling multicast
promiscous for the VFs should they attempt to send over 30 multicast
addresses or if they use the new message type to enable multicast
promiscuous.

Signed-off-by: Alexander Duyck <[email-masked]>
Signed-off-by: Jeff Kirsher <[email-masked]>
---

 drivers/net/igb/e1000_mbx.h |   10 +-
 drivers/net/igb/igb.h       |    2 
 drivers/net/igb/igb_main.c  |  173 +++++++++++++++++++++++++++++--------------
 3 files changed, 125 insertions(+), 60 deletions(-)

diff --git a/drivers/net/igb/e1000_mbx.h b/drivers/net/igb/e1000_mbx.h
index ebc02ea..bb112fb 100644
--- a/drivers/net/igb/e1000_mbx.h
+++ b/drivers/net/igb/e1000_mbx.h
@@ -58,10 +58,12 @@
 #define E1000_VT_MSGINFO_MASK     (0xFF << E1000_VT_MSGINFO_SHIFT)
 
 #define E1000_VF_RESET            0x01 /* VF requests reset */
-#define E1000_VF_SET_MAC_ADDR     0x02 /* VF requests PF to set MAC addr */
-#define E1000_VF_SET_MULTICAST    0x03 /* VF requests PF to set MC addr */
-#define E1000_VF_SET_VLAN         0x04 /* VF requests PF to set VLAN */
-#define E1000_VF_SET_LPE          0x05 /* VF requests PF to set VMOLR.LPE */
+#define E1000_VF_SET_MAC_ADDR     0x02 /* VF requests to set MAC addr */
+#define E1000_VF_SET_MULTICAST    0x03 /* VF requests to set MC addr */
+#define E1000_VF_SET_VLAN         0x04 /* VF requests to set VLAN */
+#define E1000_VF_SET_LPE          0x05 /* VF requests to set VMOLR.LPE */
+#define E1000_VF_SET_PROMISC      0x06 /*VF requests to clear VMOLR.ROPE/MPME*/
+#define E1000_VF_SET_PROMISC_MULTICAST    (0x02 << E1000_VT_MSGINFO_SHIFT)
 
 #define E1000_PF_CONTROL_MSG      0x0100 /* PF control message */
 
diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h
index 7801d3f..c27dc1a 100644
--- a/drivers/net/igb/igb.h
+++ b/drivers/net/igb/igb.h
@@ -78,6 +78,8 @@ struct vf_data_storage {
 };
 
 #define IGB_VF_FLAG_CTS            0x00000001 /* VF is clear to send data */
+#define IGB_VF_FLAG_UNI_PROMISC    0x00000002 /* VF has unicast promisc */
+#define IGB_VF_FLAG_MULTI_PROMISC  0x00000004 /* VF has multicast promisc */
 
 /* RX descriptor control thresholds.
  * PTHRESH - MAC will consider prefetch if it has fewer than this number of
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index a9e8ba2..3ab2978 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -129,38 +129,6 @@ static void igb_vmm_control(struct igb_adapter *);
 static int igb_set_vf_mac(struct igb_adapter *, int, unsigned char *);
 static void igb_restore_vf_multicasts(struct igb_adapter *adapter);
 
-static inline void igb_set_vmolr(struct e1000_hw *hw, int vfn)
-{
-	u32 reg_data;
-
-	reg_data = rd32(E1000_VMOLR(vfn));
-	reg_data |= E1000_VMOLR_BAM |	 /* Accept broadcast */
-	            E1000_VMOLR_ROMPE |  /* Accept packets matched in MTA */
-	            E1000_VMOLR_AUPE |   /* Accept untagged packets */
-	            E1000_VMOLR_STRVLAN; /* Strip vlan tags */
-	wr32(E1000_VMOLR(vfn), reg_data);
-}
-
-static inline int igb_set_vf_rlpml(struct igb_adapter *adapter, int size,
-                                 int vfn)
-{
-	struct e1000_hw *hw = &adapter->hw;
-	u32 vmolr;
-
-	/* if it isn't the PF check to see if VFs are enabled and
-	 * increase the size to support vlan tags */
-	if (vfn < adapter->vfs_allocated_count &&
-	    adapter->vf_data[vfn].vlans_enabled)
-		size += VLAN_TAG_SIZE;
-
-	vmolr = rd32(E1000_VMOLR(vfn));
-	vmolr &= ~E1000_VMOLR_RLPML_MASK;
-	vmolr |= size | E1000_VMOLR_LPE;
-	wr32(E1000_VMOLR(vfn), vmolr);
-
-	return 0;
-}
-
 #ifdef CONFIG_PM
 static int igb_suspend(struct pci_dev *, pm_message_t);
 static int igb_resume(struct pci_dev *);
@@ -1115,8 +1083,6 @@ int igb_up(struct igb_adapter *adapter)
 	if (adapter->msix_entries)
 		igb_configure_msix(adapter);
 
-	igb_set_vmolr(hw, adapter->vfs_allocated_count);
-
 	/* Clear any pending interrupts. */
 	rd32(E1000_ICR);
 	igb_irq_enable(adapter);
@@ -1892,8 +1858,6 @@ static int igb_open(struct net_device *netdev)
 	 * clean_rx handler before we do so.  */
 	igb_configure(adapter);
 
-	igb_set_vmolr(hw, adapter->vfs_allocated_count);
-
 	err = igb_request_irq(adapter);
 	if (err)
 		goto err_req_irq;
@@ -2331,22 +2295,33 @@ void igb_setup_rctl(struct igb_adapter *adapter)
 	 * if an un-trusted VF does not provide descriptors to hardware.
 	 */
 	if (adapter->vfs_allocated_count) {
-		u32 vmolr;
-
 		/* set all queue drop enable bits */
 		wr32(E1000_QDE, ALL_QUEUES);
-
-		vmolr = rd32(E1000_VMOLR(adapter->vfs_allocated_count));
-		if (rctl & E1000_RCTL_LPE)
-			vmolr |= E1000_VMOLR_LPE;
-		if (adapter->num_rx_queues > 1)
-			vmolr |= E1000_VMOLR_RSSE;
-		wr32(E1000_VMOLR(adapter->vfs_allocated_count), vmolr);
 	}
 
 	wr32(E1000_RCTL, rctl);
 }
 
+static inline int igb_set_vf_rlpml(struct igb_adapter *adapter, int size,
+                                   int vfn)
+{
+	struct e1000_hw *hw = &adapter->hw;
+	u32 vmolr;
+
+	/* if it isn't the PF check to see if VFs are enabled and
+	 * increase the size to support vlan tags */
+	if (vfn < adapter->vfs_allocated_count &&
+	    adapter->vf_data[vfn].vlans_enabled)
+		size += VLAN_TAG_SIZE;
+
+	vmolr = rd32(E1000_VMOLR(vfn));
+	vmolr &= ~E1000_VMOLR_RLPML_MASK;
+	vmolr |= size | E1000_VMOLR_LPE;
+	wr32(E1000_VMOLR(vfn), vmolr);
+
+	return 0;
+}
+
 /**
  * igb_rlpml_set - set maximum receive packet size
  * @adapter: board private structure
@@ -2366,12 +2341,43 @@ static void igb_rlpml_set(struct igb_adapter *adapter)
 	 * size and set the VMOLR RLPML to the size we need */
 	if (pf_id) {
 		igb_set_vf_rlpml(adapter, max_frame_size, pf_id);
-		max_frame_size = MAX_STD_JUMBO_FRAME_SIZE + VLAN_TAG_SIZE;
+		max_frame_size = MAX_JUMBO_FRAME_SIZE;
 	}
 
 	wr32(E1000_RLPML, max_frame_size);
 }
 
+static inline void igb_set_vmolr(struct igb_adapter *adapter, int vfn)
+{
+	struct e1000_hw *hw = &adapter->hw;
+	u32 vmolr;
+
+	/*
+	 * This register exists only on 82576 and newer so if we are older then
+	 * we should exit and do nothing
+	 */
+	if (hw->mac.type < e1000_82576)
+		return;
+
+	vmolr = rd32(E1000_VMOLR(vfn));
+	vmolr |= E1000_VMOLR_AUPE |        /* Accept untagged packets */
+	         E1000_VMOLR_STRVLAN;      /* Strip vlan tags */
+
+	/* clear all bits that might not be set */
+	vmolr &= ~(E1000_VMOLR_BAM | E1000_VMOLR_RSSE);
+
+	if (adapter->num_rx_queues > 1 && vfn == adapter->vfs_allocated_count)
+		vmolr |= E1000_VMOLR_RSSE; /* enable RSS */
+	/*
+	 * for VMDq only allow the VFs and pool 0 to accept broadcast and
+	 * multicast packets
+	 */
+	if (vfn <= adapter->vfs_allocated_count)
+		vmolr |= E1000_VMOLR_BAM;	   /* Accept broadcast */
+
+	wr32(E1000_VMOLR(vfn), vmolr);
+}
+
 /**
  * igb_configure_rx_ring - Configure a receive ring after Reset
  * @adapter: board private structure
@@ -2425,6 +2431,9 @@ void igb_configure_rx_ring(struct igb_adapter *adapter,
 
 	wr32(E1000_SRRCTL(reg_idx), srrctl);
 
+	/* set filtering for VMDQ pools */
+	igb_set_vmolr(adapter, reg_idx & 0x7);
+
 	/* enable receive descriptor fetching */
 	rxdctl = rd32(E1000_RXDCTL(reg_idx));
 	rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
@@ -4101,6 +4110,45 @@ static void igb_ping_all_vfs(struct igb_adapter *adapter)
 	}
 }
 
+static int igb_set_vf_promisc(struct igb_adapter *adapter, u32 *msgbuf, u32 vf)
+{
+	struct e1000_hw *hw = &adapter->hw;
+	u32 vmolr = rd32(E1000_VMOLR(vf));
+	struct vf_data_storage *vf_data = &adapter->vf_data[vf];
+
+	vf_data->flags |= ~(IGB_VF_FLAG_UNI_PROMISC |
+	                    IGB_VF_FLAG_MULTI_PROMISC);
+	vmolr &= ~(E1000_VMOLR_ROPE | E1000_VMOLR_ROMPE | E1000_VMOLR_MPME);
+
+	if (*msgbuf & E1000_VF_SET_PROMISC_MULTICAST) {
+		vmolr |= E1000_VMOLR_MPME;
+		*msgbuf &= ~E1000_VF_SET_PROMISC_MULTICAST;
+	} else {
+		/*
+		 * if we have hashes and we are clearing a multicast promisc
+		 * flag we need to write the hashes to the MTA as this step
+		 * was previously skipped
+		 */
+		if (vf_data->num_vf_mc_hashes > 30) {
+			vmolr |= E1000_VMOLR_MPME;
+		} else if (vf_data->num_vf_mc_hashes) {
+			int j;
+			vmolr |= E1000_VMOLR_ROMPE;
+			for (j = 0; j < vf_data->num_vf_mc_hashes; j++)
+				igb_mta_set(hw, vf_data->vf_mc_hashes[j]);
+		}
+	}
+
+	wr32(E1000_VMOLR(vf), vmolr);
+
+	/* there are flags left unprocessed, likely not supported */
+	if (*msgbuf & E1000_VT_MSGINFO_MASK)
+		return -EINVAL;
+
+	return 0;
+
+}
+
 static int igb_set_vf_multicasts(struct igb_adapter *adapter,
 				  u32 *msgbuf, u32 vf)
 {
@@ -4109,18 +4157,17 @@ static int igb_set_vf_multicasts(struct igb_adapter *adapter,
 	struct vf_data_storage *vf_data = &adapter->vf_data[vf];
 	int i;
 
-	/* only up to 30 hash values supported */
-	if (n > 30)
-		n = 30;
-
-	/* salt away the number of multi cast addresses assigned
+	/* salt away the number of multicast addresses assigned
 	 * to this VF for later use to restore when the PF multi cast
 	 * list changes
 	 */
 	vf_data->num_vf_mc_hashes = n;
 
-	/* VFs are limited to using the MTA hash table for their multicast
-	 * addresses */
+	/* only up to 30 hash values supported */
+	if (n > 30)
+		n = 30;
+
+	/* store the hashes for later use */
 	for (i = 0; i < n; i++)
 		vf_data->vf_mc_hashes[i] = hash_list[i];
 
@@ -4137,9 +4184,20 @@ static void igb_restore_vf_multicasts(struct igb_adapter *adapter)
 	int i, j;
 
 	for (i = 0; i < adapter->vfs_allocated_count; i++) {
+		u32 vmolr = rd32(E1000_VMOLR(i));
+		vmolr &= ~(E1000_VMOLR_ROMPE | E1000_VMOLR_MPME);
+
 		vf_data = &adapter->vf_data[i];
-		for (j = 0; j < vf_data->num_vf_mc_hashes; j++)
-			igb_mta_set(hw, vf_data->vf_mc_hashes[j]);
+
+		if ((vf_data->num_vf_mc_hashes > 30) ||
+		    (vf_data->flags & IGB_VF_FLAG_MULTI_PROMISC)) {
+			vmolr |= E1000_VMOLR_MPME;
+		} else if (vf_data->num_vf_mc_hashes) {
+			vmolr |= E1000_VMOLR_ROMPE;
+			for (j = 0; j < vf_data->num_vf_mc_hashes; j++)
+				igb_mta_set(hw, vf_data->vf_mc_hashes[j]);
+		}
+		wr32(E1000_VMOLR(i), vmolr);
 	}
 }
 
@@ -4282,7 +4340,7 @@ static inline void igb_vf_reset(struct igb_adapter *adapter, u32 vf)
 	adapter->vf_data[vf].last_nack = jiffies;
 
 	/* reset offloads to defaults */
-	igb_set_vmolr(&adapter->hw, vf);
+	igb_set_vmolr(adapter, vf);
 
 	/* reset vlans for device */
 	igb_clear_vf_vfta(adapter, vf);
@@ -4398,6 +4456,9 @@ static void igb_rcv_msg_from_vf(struct igb_adapter *adapter, u32 vf)
 	case E1000_VF_SET_MAC_ADDR:
 		retval = igb_set_vf_mac_addr(adapter, msgbuf, vf);
 		break;
+	case E1000_VF_SET_PROMISC:
+		retval = igb_set_vf_promisc(adapter, msgbuf, vf);
+		break;
 	case E1000_VF_SET_MULTICAST:
 		retval = igb_set_vf_multicasts(adapter, msgbuf, vf);
 		break;