[PATCH net-next 0/6] net: lan966x: Add switchdev and vlan support

[PATCH net-next 0/6] net: lan966x: Add switchdev and vlan support

[Horatiu Vultur]

This patch series extends lan966x with switchdev and vlan support.
The first patches just adds new registers and extend the MAC table to
handle the interrupts when a new address is learn/forget.
The last 2 patches adds the vlan and the switchdev support.

Horatiu Vultur (6):
  net: lan966x: Add registers that are used for switch and vlan
    functionality
  dt-bindings: net: lan966x: Extend with the analyzer interrupt
  net: lan966x: add support for interrupts from analyzer
  net: lan966x: More MAC table functionality
  net: lan966x: Add vlan support
  net: lan966x: Add switchdev support

 .../net/microchip,lan966x-switch.yaml         |   2 +
 .../net/ethernet/microchip/lan966x/Makefile   |   3 +-
 .../ethernet/microchip/lan966x/lan966x_mac.c  | 337 +++++++++++
 .../ethernet/microchip/lan966x/lan966x_main.c |  92 ++-
 .../ethernet/microchip/lan966x/lan966x_main.h |  71 ++-
 .../ethernet/microchip/lan966x/lan966x_regs.h | 129 +++++
 .../microchip/lan966x/lan966x_switchdev.c     | 544 ++++++++++++++++++
 .../ethernet/microchip/lan966x/lan966x_vlan.c | 439 ++++++++++++++
 8 files changed, 1602 insertions(+), 15 deletions(-)
 create mode 100644 drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c
 create mode 100644 drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c

-- 
2.33.0

[PATCH net-next 1/6] net: lan966x: Add registers that are used for switch and vlan functionality

[Horatiu Vultur]

This patch adds the registers that will be used to enable switchdev and
vlan functionality in the HW.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
 .../ethernet/microchip/lan966x/lan966x_regs.h | 129 ++++++++++++++++++
 1 file changed, 129 insertions(+)

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_regs.h b/drivers/net/ethernet/microchip/lan966x/lan966x_regs.h
index 879dcd807dec..2f2b26b9f8c6 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_regs.h
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_regs.h
@@ -61,6 +61,9 @@ enum lan966x_target {
 #define ANA_ADVLEARN_VLAN_CHK_GET(x)\
 	FIELD_GET(ANA_ADVLEARN_VLAN_CHK, x)
 
+/*      ANA:ANA:VLANMASK */
+#define ANA_VLANMASK              __REG(TARGET_ANA, 0, 1, 29824, 0, 1, 244, 8, 0, 1, 4)
+
 /*      ANA:ANA:ANAINTR */
 #define ANA_ANAINTR               __REG(TARGET_ANA, 0, 1, 29824, 0, 1, 244, 16, 0, 1, 4)
 
@@ -184,6 +187,102 @@ enum lan966x_target {
 #define ANA_MACACCESS_MAC_TABLE_CMD_GET(x)\
 	FIELD_GET(ANA_MACACCESS_MAC_TABLE_CMD, x)
 
+/*      ANA:ANA_TABLES:MACTINDX */
+#define ANA_MACTINDX              __REG(TARGET_ANA, 0, 1, 27520, 0, 1, 128, 52, 0, 1, 4)
+
+#define ANA_MACTINDX_BUCKET                      GENMASK(12, 11)
+#define ANA_MACTINDX_BUCKET_SET(x)\
+	FIELD_PREP(ANA_MACTINDX_BUCKET, x)
+#define ANA_MACTINDX_BUCKET_GET(x)\
+	FIELD_GET(ANA_MACTINDX_BUCKET, x)
+
+#define ANA_MACTINDX_M_INDEX                     GENMASK(10, 0)
+#define ANA_MACTINDX_M_INDEX_SET(x)\
+	FIELD_PREP(ANA_MACTINDX_M_INDEX, x)
+#define ANA_MACTINDX_M_INDEX_GET(x)\
+	FIELD_GET(ANA_MACTINDX_M_INDEX, x)
+
+/*      ANA:ANA_TABLES:VLAN_PORT_MASK */
+#define ANA_VLAN_PORT_MASK        __REG(TARGET_ANA, 0, 1, 27520, 0, 1, 128, 56, 0, 1, 4)
+
+#define ANA_VLAN_PORT_MASK_VLAN_PORT_MASK        GENMASK(8, 0)
+#define ANA_VLAN_PORT_MASK_VLAN_PORT_MASK_SET(x)\
+	FIELD_PREP(ANA_VLAN_PORT_MASK_VLAN_PORT_MASK, x)
+#define ANA_VLAN_PORT_MASK_VLAN_PORT_MASK_GET(x)\
+	FIELD_GET(ANA_VLAN_PORT_MASK_VLAN_PORT_MASK, x)
+
+/*      ANA:ANA_TABLES:VLANACCESS */
+#define ANA_VLANACCESS            __REG(TARGET_ANA, 0, 1, 27520, 0, 1, 128, 60, 0, 1, 4)
+
+#define ANA_VLANACCESS_VLAN_TBL_CMD              GENMASK(1, 0)
+#define ANA_VLANACCESS_VLAN_TBL_CMD_SET(x)\
+	FIELD_PREP(ANA_VLANACCESS_VLAN_TBL_CMD, x)
+#define ANA_VLANACCESS_VLAN_TBL_CMD_GET(x)\
+	FIELD_GET(ANA_VLANACCESS_VLAN_TBL_CMD, x)
+
+/*      ANA:ANA_TABLES:VLANTIDX */
+#define ANA_VLANTIDX              __REG(TARGET_ANA, 0, 1, 27520, 0, 1, 128, 64, 0, 1, 4)
+
+#define ANA_VLANTIDX_VLAN_PGID_CPU_DIS           BIT(18)
+#define ANA_VLANTIDX_VLAN_PGID_CPU_DIS_SET(x)\
+	FIELD_PREP(ANA_VLANTIDX_VLAN_PGID_CPU_DIS, x)
+#define ANA_VLANTIDX_VLAN_PGID_CPU_DIS_GET(x)\
+	FIELD_GET(ANA_VLANTIDX_VLAN_PGID_CPU_DIS, x)
+
+#define ANA_VLANTIDX_V_INDEX                     GENMASK(11, 0)
+#define ANA_VLANTIDX_V_INDEX_SET(x)\
+	FIELD_PREP(ANA_VLANTIDX_V_INDEX, x)
+#define ANA_VLANTIDX_V_INDEX_GET(x)\
+	FIELD_GET(ANA_VLANTIDX_V_INDEX, x)
+
+/*      ANA:PORT:VLAN_CFG */
+#define ANA_VLAN_CFG(g)           __REG(TARGET_ANA, 0, 1, 28672, g, 9, 128, 0, 0, 1, 4)
+
+#define ANA_VLAN_CFG_VLAN_AWARE_ENA              BIT(20)
+#define ANA_VLAN_CFG_VLAN_AWARE_ENA_SET(x)\
+	FIELD_PREP(ANA_VLAN_CFG_VLAN_AWARE_ENA, x)
+#define ANA_VLAN_CFG_VLAN_AWARE_ENA_GET(x)\
+	FIELD_GET(ANA_VLAN_CFG_VLAN_AWARE_ENA, x)
+
+#define ANA_VLAN_CFG_VLAN_POP_CNT                GENMASK(19, 18)
+#define ANA_VLAN_CFG_VLAN_POP_CNT_SET(x)\
+	FIELD_PREP(ANA_VLAN_CFG_VLAN_POP_CNT, x)
+#define ANA_VLAN_CFG_VLAN_POP_CNT_GET(x)\
+	FIELD_GET(ANA_VLAN_CFG_VLAN_POP_CNT, x)
+
+#define ANA_VLAN_CFG_VLAN_VID                    GENMASK(11, 0)
+#define ANA_VLAN_CFG_VLAN_VID_SET(x)\
+	FIELD_PREP(ANA_VLAN_CFG_VLAN_VID, x)
+#define ANA_VLAN_CFG_VLAN_VID_GET(x)\
+	FIELD_GET(ANA_VLAN_CFG_VLAN_VID, x)
+
+/*      ANA:PORT:DROP_CFG */
+#define ANA_DROP_CFG(g)           __REG(TARGET_ANA, 0, 1, 28672, g, 9, 128, 4, 0, 1, 4)
+
+#define ANA_DROP_CFG_DROP_UNTAGGED_ENA           BIT(6)
+#define ANA_DROP_CFG_DROP_UNTAGGED_ENA_SET(x)\
+	FIELD_PREP(ANA_DROP_CFG_DROP_UNTAGGED_ENA, x)
+#define ANA_DROP_CFG_DROP_UNTAGGED_ENA_GET(x)\
+	FIELD_GET(ANA_DROP_CFG_DROP_UNTAGGED_ENA, x)
+
+#define ANA_DROP_CFG_DROP_PRIO_S_TAGGED_ENA      BIT(3)
+#define ANA_DROP_CFG_DROP_PRIO_S_TAGGED_ENA_SET(x)\
+	FIELD_PREP(ANA_DROP_CFG_DROP_PRIO_S_TAGGED_ENA, x)
+#define ANA_DROP_CFG_DROP_PRIO_S_TAGGED_ENA_GET(x)\
+	FIELD_GET(ANA_DROP_CFG_DROP_PRIO_S_TAGGED_ENA, x)
+
+#define ANA_DROP_CFG_DROP_PRIO_C_TAGGED_ENA      BIT(2)
+#define ANA_DROP_CFG_DROP_PRIO_C_TAGGED_ENA_SET(x)\
+	FIELD_PREP(ANA_DROP_CFG_DROP_PRIO_C_TAGGED_ENA, x)
+#define ANA_DROP_CFG_DROP_PRIO_C_TAGGED_ENA_GET(x)\
+	FIELD_GET(ANA_DROP_CFG_DROP_PRIO_C_TAGGED_ENA, x)
+
+#define ANA_DROP_CFG_DROP_MC_SMAC_ENA            BIT(0)
+#define ANA_DROP_CFG_DROP_MC_SMAC_ENA_SET(x)\
+	FIELD_PREP(ANA_DROP_CFG_DROP_MC_SMAC_ENA, x)
+#define ANA_DROP_CFG_DROP_MC_SMAC_ENA_GET(x)\
+	FIELD_GET(ANA_DROP_CFG_DROP_MC_SMAC_ENA, x)
+
 /*      ANA:PORT:CPU_FWD_CFG */
 #define ANA_CPU_FWD_CFG(g)        __REG(TARGET_ANA, 0, 1, 28672, g, 9, 128, 96, 0, 1, 4)
 
@@ -589,6 +688,36 @@ enum lan966x_target {
 /*      QSYS:RES_CTRL:RES_CFG */
 #define QSYS_RES_CFG(g)           __REG(TARGET_QSYS, 0, 1, 32768, g, 1024, 8, 0, 0, 1, 4)
 
+/*      REW:PORT:PORT_VLAN_CFG */
+#define REW_PORT_VLAN_CFG(g)      __REG(TARGET_REW, 0, 1, 0, g, 10, 128, 0, 0, 1, 4)
+
+#define REW_PORT_VLAN_CFG_PORT_TPID              GENMASK(31, 16)
+#define REW_PORT_VLAN_CFG_PORT_TPID_SET(x)\
+	FIELD_PREP(REW_PORT_VLAN_CFG_PORT_TPID, x)
+#define REW_PORT_VLAN_CFG_PORT_TPID_GET(x)\
+	FIELD_GET(REW_PORT_VLAN_CFG_PORT_TPID, x)
+
+#define REW_PORT_VLAN_CFG_PORT_VID               GENMASK(11, 0)
+#define REW_PORT_VLAN_CFG_PORT_VID_SET(x)\
+	FIELD_PREP(REW_PORT_VLAN_CFG_PORT_VID, x)
+#define REW_PORT_VLAN_CFG_PORT_VID_GET(x)\
+	FIELD_GET(REW_PORT_VLAN_CFG_PORT_VID, x)
+
+/*      REW:PORT:TAG_CFG */
+#define REW_TAG_CFG(g)            __REG(TARGET_REW, 0, 1, 0, g, 10, 128, 4, 0, 1, 4)
+
+#define REW_TAG_CFG_TAG_CFG                      GENMASK(8, 7)
+#define REW_TAG_CFG_TAG_CFG_SET(x)\
+	FIELD_PREP(REW_TAG_CFG_TAG_CFG, x)
+#define REW_TAG_CFG_TAG_CFG_GET(x)\
+	FIELD_GET(REW_TAG_CFG_TAG_CFG, x)
+
+#define REW_TAG_CFG_TAG_TPID_CFG                 GENMASK(6, 5)
+#define REW_TAG_CFG_TAG_TPID_CFG_SET(x)\
+	FIELD_PREP(REW_TAG_CFG_TAG_TPID_CFG, x)
+#define REW_TAG_CFG_TAG_TPID_CFG_GET(x)\
+	FIELD_GET(REW_TAG_CFG_TAG_TPID_CFG, x)
+
 /*      REW:PORT:PORT_CFG */
 #define REW_PORT_CFG(g)           __REG(TARGET_REW, 0, 1, 0, g, 10, 128, 8, 0, 1, 4)
 
-- 
2.33.0

[PATCH net-next 2/6] dt-bindings: net: lan966x: Extend with the analyzer interrupt

[Horatiu Vultur]

Extend dt-bindings for lan966x with analyzer interrupt.
This interrupt can be generated for example when the HW learn/forgets
an entry in the MAC table.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
 .../devicetree/bindings/net/microchip,lan966x-switch.yaml       | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/microchip,lan966x-switch.yaml b/Documentation/devicetree/bindings/net/microchip,lan966x-switch.yaml
index 5bee665d5fcf..e79e4e166ad8 100644
--- a/Documentation/devicetree/bindings/net/microchip,lan966x-switch.yaml
+++ b/Documentation/devicetree/bindings/net/microchip,lan966x-switch.yaml
@@ -37,12 +37,14 @@ properties:
     items:
       - description: register based extraction
       - description: frame dma based extraction
+      - description: analyzer interrupt
 
   interrupt-names:
     minItems: 1
     items:
       - const: xtr
       - const: fdma
+      - const: ana
 
   resets:
     items:
-- 
2.33.0

[PATCH net-next 3/6] net: lan966x: add support for interrupts from analyzer

[Horatiu Vultur]

This patch adds support for handling the interrupts generated by the
analyzer. Currently, only the MAC table generates these interrupts.
The MAC table will generate an interrupt whenever it learns or forgets
an entry in the table. It is the SW responsibility figure out which
entries were added/removed.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
 .../ethernet/microchip/lan966x/lan966x_mac.c  | 229 ++++++++++++++++++
 .../ethernet/microchip/lan966x/lan966x_main.c |  16 ++
 .../ethernet/microchip/lan966x/lan966x_main.h |   5 +
 3 files changed, 250 insertions(+)

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c b/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
index f6878b9f57ef..d5bb974f49fe 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0+
 
+#include <net/switchdev.h>
 #include "lan966x_main.h"
 
 #define LAN966X_MAC_COLUMNS		4
@@ -13,6 +14,23 @@
 #define MACACCESS_CMD_WRITE		7
 #define MACACCESS_CMD_SYNC_GET_NEXT	8
 
+#define LAN966X_MAC_INVALID_ROW		-1
+
+struct lan966x_mac_entry {
+	struct list_head list;
+	unsigned char mac[ETH_ALEN];
+	u16 vid;
+	u16 port_index;
+	int row;
+};
+
+struct lan966x_mac_raw_entry {
+	u32 mach;
+	u32 macl;
+	u32 maca;
+	bool process;
+};
+
 static int lan966x_mac_get_status(struct lan966x *lan966x)
 {
 	return lan_rd(lan966x, ANA_MACACCESS);
@@ -98,4 +116,215 @@ void lan966x_mac_init(struct lan966x *lan966x)
 	/* Clear the MAC table */
 	lan_wr(MACACCESS_CMD_INIT, lan966x, ANA_MACACCESS);
 	lan966x_mac_wait_for_completion(lan966x);
+
+	spin_lock_init(&lan966x->mac_lock);
+	INIT_LIST_HEAD(&lan966x->mac_entries);
+}
+
+static struct lan966x_mac_entry *lan966x_mac_alloc_entry(struct lan966x *lan966x,
+							 const unsigned char *mac,
+							 u16 vid, u16 port_index)
+{
+	struct lan966x_mac_entry *mac_entry;
+
+	mac_entry = devm_kzalloc(lan966x->dev,
+				 sizeof(*mac_entry), GFP_ATOMIC);
+	if (!mac_entry)
+		return NULL;
+
+	memcpy(mac_entry->mac, mac, ETH_ALEN);
+	mac_entry->vid = vid;
+	mac_entry->port_index = port_index;
+	mac_entry->row = LAN966X_MAC_INVALID_ROW;
+	return mac_entry;
+}
+
+static void lan966x_fdb_call_notifiers(enum switchdev_notifier_type type,
+				       const char *mac, u16 vid,
+				       struct net_device *dev)
+{
+	struct switchdev_notifier_fdb_info info = { 0 };
+
+	info.addr = mac;
+	info.vid = vid == PORT_PVID ? 0 : vid;
+	info.offloaded = true;
+	call_switchdev_notifiers(type, dev, &info.info, NULL);
+}
+
+static void lan966x_mac_notifiers(struct lan966x *lan966x,
+				  enum switchdev_notifier_type type,
+				  unsigned char *mac, u32 vid,
+				  struct net_device *dev)
+{
+	rtnl_lock();
+	lan966x_fdb_call_notifiers(type, mac, vid, dev);
+	rtnl_unlock();
+}
+
+static void lan966x_mac_process_raw_entry(struct lan966x_mac_raw_entry *raw_entry,
+					  u8 *mac, u16 *vid, u32 *dest_idx)
+{
+	mac[0] = (raw_entry->mach >> 8)  & 0xff;
+	mac[1] = (raw_entry->mach >> 0)  & 0xff;
+	mac[2] = (raw_entry->macl >> 24) & 0xff;
+	mac[3] = (raw_entry->macl >> 16) & 0xff;
+	mac[4] = (raw_entry->macl >> 8)  & 0xff;
+	mac[5] = (raw_entry->macl >> 0)  & 0xff;
+
+	*vid = (raw_entry->mach >> 16) & 0xfff;
+	*dest_idx  = ANA_MACACCESS_DEST_IDX_GET(raw_entry->maca);
+}
+
+static void lan966x_mac_irq_process(struct lan966x *lan966x, u32 row,
+				    struct lan966x_mac_raw_entry *raw_entries)
+{
+	struct lan966x_mac_entry *mac_entry, *tmp;
+	unsigned long flags;
+	char mac[ETH_ALEN];
+	u32 dest_idx;
+	u32 column;
+	u16 vid;
+
+	spin_lock_irqsave(&lan966x->mac_lock, flags);
+	list_for_each_entry_safe(mac_entry, tmp, &lan966x->mac_entries, list) {
+		bool founded = false;
+
+		if (mac_entry->row != row)
+			continue;
+
+		for (column = 0; column < LAN966X_MAC_COLUMNS; ++column) {
+			/* All the valid entries are at the start of the row,
+			 * so when get one invalid entry it can just skip the
+			 * rest of the columns
+			 */
+			if (!ANA_MACACCESS_VALID_GET(raw_entries[column].maca))
+				break;
+
+			lan966x_mac_process_raw_entry(&raw_entries[column],
+						      mac, &vid, &dest_idx);
+			WARN_ON(dest_idx > lan966x->num_phys_ports);
+
+			/* If the entry in SW is found, then there is nothing
+			 * to do
+			 */
+			if (mac_entry->vid == vid &&
+			    ether_addr_equal(mac_entry->mac, mac) &&
+			    mac_entry->port_index == dest_idx) {
+				raw_entries[column].process = true;
+				founded = true;
+				break;
+			}
+		}
+
+		if (!founded) {
+			/* Notify the bridge that the entry doesn't exist
+			 * anymore in the HW and remmove the entry from the SW
+			 * list
+			 */
+			lan966x_mac_notifiers(lan966x, SWITCHDEV_FDB_DEL_TO_BRIDGE,
+					      mac_entry->mac, mac_entry->vid,
+					      lan966x->ports[mac_entry->port_index]->dev);
+
+			list_del(&mac_entry->list);
+			devm_kfree(lan966x->dev, mac_entry);
+		}
+	}
+	spin_unlock_irqrestore(&lan966x->mac_lock, flags);
+
+	/* Now go to the list of columns and see if any entry was not in the SW
+	 * list, then that means that the entry is new so it needs to notify the
+	 * bridge.
+	 */
+	for (column = 0; column < LAN966X_MAC_COLUMNS; ++column) {
+		/* All the valid entries are at the start of the row, so when
+		 * get one invalid entry it can just skip the rest of the columns
+		 */
+		if (!ANA_MACACCESS_VALID_GET(raw_entries[column].maca))
+			break;
+
+		/* If the entry already exists then don't do anything */
+		if (raw_entries[column].process)
+			continue;
+
+		lan966x_mac_process_raw_entry(&raw_entries[column],
+					      mac, &vid, &dest_idx);
+		WARN_ON(dest_idx > lan966x->num_phys_ports);
+
+		mac_entry = lan966x_mac_alloc_entry(lan966x, mac, vid, dest_idx);
+		if (!mac_entry)
+			return;
+
+		mac_entry->row = row;
+
+		spin_lock_irqsave(&lan966x->mac_lock, flags);
+		list_add_tail(&mac_entry->list, &lan966x->mac_entries);
+		spin_unlock_irqrestore(&lan966x->mac_lock, flags);
+
+		lan966x_mac_notifiers(lan966x, SWITCHDEV_FDB_ADD_TO_BRIDGE,
+				      mac, vid, lan966x->ports[dest_idx]->dev);
+	}
+}
+
+irqreturn_t lan966x_mac_irq_handler(struct lan966x *lan966x)
+{
+	struct lan966x_mac_raw_entry entry[LAN966X_MAC_COLUMNS] = { 0 };
+	u32 index, column;
+	bool stop = true;
+	u32 val;
+
+	/* Check if the mac table triggered this, if not just bail out */
+	if (!(ANA_ANAINTR_INTR_GET(lan_rd(lan966x, ANA_ANAINTR))))
+		return IRQ_NONE;
+
+	/* Start the scan from 0, 0 */
+	lan_wr(ANA_MACTINDX_M_INDEX_SET(0) |
+	       ANA_MACTINDX_BUCKET_SET(0),
+	       lan966x, ANA_MACTINDX);
+
+	while (1) {
+		lan_rmw(ANA_MACACCESS_MAC_TABLE_CMD_SET(MACACCESS_CMD_SYNC_GET_NEXT),
+			ANA_MACACCESS_MAC_TABLE_CMD,
+			lan966x, ANA_MACACCESS);
+		lan966x_mac_wait_for_completion(lan966x);
+
+		val = lan_rd(lan966x, ANA_MACTINDX);
+		index = ANA_MACTINDX_M_INDEX_GET(val);
+		column = ANA_MACTINDX_BUCKET_GET(val);
+
+		/* The SYNC-GET-NEXT returns all the entries(4) in a row in
+		 * which is suffered a change. By change it means that new entry
+		 * was added or an entry was removed because of ageing.
+		 * It would return all the columns for that row. And after that
+		 * it would return the next row The stop conditions of the
+		 * SYNC-GET-NEXT is when it reaches 'directly' to row 0
+		 * column 3. So if SYNC-GET-NEXT returns row 0 and column 0
+		 * then it is required to continue to read more even if it
+		 * reaches row 0 and column 3.
+		 */
+		if (index == 0 && column == 0)
+			stop = false;
+
+		if (column == LAN966X_MAC_COLUMNS - 1 &&
+		    index == 0 && stop)
+			break;
+
+		entry[column].mach = lan_rd(lan966x, ANA_MACHDATA);
+		entry[column].macl = lan_rd(lan966x, ANA_MACLDATA);
+		entry[column].maca = lan_rd(lan966x, ANA_MACACCESS);
+
+		/* Once all the columns are read process them */
+		if (column == LAN966X_MAC_COLUMNS - 1) {
+			lan966x_mac_irq_process(lan966x, index, entry);
+			/* A row was processed so it is safe to assume that the
+			 * next row/column can be the stop condition
+			 */
+			stop = true;
+		}
+	}
+
+	lan_rmw(ANA_ANAINTR_INTR_SET(0),
+		ANA_ANAINTR_INTR,
+		lan966x, ANA_ANAINTR);
+
+	return IRQ_HANDLED;
 }
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
index be5e2b3a7f43..38868cf184c6 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
@@ -527,6 +527,13 @@ static irqreturn_t lan966x_xtr_irq_handler(int irq, void *args)
 	return IRQ_HANDLED;
 }
 
+static irqreturn_t lan966x_ana_irq_handler(int irq, void *args)
+{
+	struct lan966x *lan966x = args;
+
+	return lan966x_mac_irq_handler(lan966x);
+}
+
 static void lan966x_cleanup_ports(struct lan966x *lan966x)
 {
 	struct lan966x_port *port;
@@ -870,6 +877,15 @@ static int lan966x_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
+	lan966x->ana_irq = platform_get_irq_byname(pdev, "ana");
+	if (lan966x->ana_irq) {
+		err = devm_request_threaded_irq(&pdev->dev, lan966x->ana_irq, NULL,
+						lan966x_ana_irq_handler, IRQF_ONESHOT,
+						"ana irq", lan966x);
+		if (err)
+			return dev_err_probe(&pdev->dev, err, "Unable to use ana irq");
+	}
+
 	/* init switch */
 	lan966x_init(lan966x);
 	lan966x_stats_init(lan966x);
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
index 7e5a3b6f168d..7ee622251019 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
@@ -75,6 +75,9 @@ struct lan966x {
 
 	u8 base_mac[ETH_ALEN];
 
+	struct list_head mac_entries;
+	spinlock_t mac_lock; /* lock for mac_entries list */
+
 	/* stats */
 	const struct lan966x_stat_layout *stats_layout;
 	u32 num_stats;
@@ -87,6 +90,7 @@ struct lan966x {
 
 	/* interrupts */
 	int xtr_irq;
+	int ana_irq;
 };
 
 struct lan966x_port_config {
@@ -141,6 +145,7 @@ int lan966x_mac_forget(struct lan966x *lan966x,
 int lan966x_mac_cpu_learn(struct lan966x *lan966x, const char *addr, u16 vid);
 int lan966x_mac_cpu_forget(struct lan966x *lan966x, const char *addr, u16 vid);
 void lan966x_mac_init(struct lan966x *lan966x);
+irqreturn_t lan966x_mac_irq_handler(struct lan966x *lan966x);
 
 static inline void __iomem *lan_addr(void __iomem *base[],
 				     int id, int tinst, int tcnt,
-- 
2.33.0

[PATCH net-next 4/6] net: lan966x: More MAC table functionality

[Horatiu Vultur]

This patch adds support for adding/removing mac entries in the SW list
of entries and in the HW table. This is used by the bridge
functionality.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
 .../ethernet/microchip/lan966x/lan966x_mac.c  | 108 ++++++++++++++++++
 .../ethernet/microchip/lan966x/lan966x_main.h |   9 ++
 2 files changed, 117 insertions(+)

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c b/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
index d5bb974f49fe..690184eba81b 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
@@ -111,6 +111,14 @@ int lan966x_mac_cpu_forget(struct lan966x *lan966x, const char *addr, u16 vid)
 	return lan966x_mac_forget(lan966x, addr, vid, ENTRYTYPE_LOCKED);
 }
 
+void lan966x_mac_set_ageing(struct lan966x *lan966x,
+			    u32 ageing)
+{
+	lan_rmw(ANA_AUTOAGE_AGE_PERIOD_SET(ageing / 2),
+		ANA_AUTOAGE_AGE_PERIOD,
+		lan966x, ANA_AUTOAGE);
+}
+
 void lan966x_mac_init(struct lan966x *lan966x)
 {
 	/* Clear the MAC table */
@@ -139,6 +147,49 @@ static struct lan966x_mac_entry *lan966x_mac_alloc_entry(struct lan966x *lan966x
 	return mac_entry;
 }
 
+static struct lan966x_mac_entry *lan966x_mac_find_entry(struct lan966x *lan966x,
+							const unsigned char *mac,
+							u16 vid, u16 port_index)
+{
+	struct lan966x_mac_entry *res = NULL;
+	struct lan966x_mac_entry *mac_entry;
+	unsigned long flags;
+
+	spin_lock_irqsave(&lan966x->mac_lock, flags);
+	list_for_each_entry(mac_entry, &lan966x->mac_entries, list) {
+		if (mac_entry->vid == vid &&
+		    ether_addr_equal(mac, mac_entry->mac) &&
+		    mac_entry->port_index == port_index) {
+			res = mac_entry;
+			break;
+		}
+	}
+	spin_unlock_irqrestore(&lan966x->mac_lock, flags);
+
+	return res;
+}
+
+static int lan966x_mac_lookup(struct lan966x *lan966x,
+			      const unsigned char mac[ETH_ALEN],
+			      unsigned int vid, enum macaccess_entry_type type)
+{
+	int ret;
+
+	lan966x_mac_select(lan966x, mac, vid);
+
+	/* Issue a read command */
+	lan_wr(ANA_MACACCESS_ENTRYTYPE_SET(type) |
+	       ANA_MACACCESS_VALID_SET(1) |
+	       ANA_MACACCESS_MAC_TABLE_CMD_SET(MACACCESS_CMD_READ),
+	       lan966x, ANA_MACACCESS);
+
+	ret = lan966x_mac_wait_for_completion(lan966x);
+	if (ret)
+		return ret;
+
+	return ANA_MACACCESS_VALID_GET(lan_rd(lan966x, ANA_MACACCESS));
+}
+
 static void lan966x_fdb_call_notifiers(enum switchdev_notifier_type type,
 				       const char *mac, u16 vid,
 				       struct net_device *dev)
@@ -151,6 +202,63 @@ static void lan966x_fdb_call_notifiers(enum switchdev_notifier_type type,
 	call_switchdev_notifiers(type, dev, &info.info, NULL);
 }
 
+int lan966x_mac_add_entry(struct lan966x *lan966x, struct lan966x_port *port,
+			  const unsigned char *addr, u16 vid)
+{
+	struct lan966x_mac_entry *mac_entry;
+	unsigned long flags;
+
+	if (lan966x_mac_lookup(lan966x, addr, vid, ENTRYTYPE_NORMAL))
+		return 0;
+
+	/* In case the entry already exists, don't add it again to SW,
+	 * just update HW, but we need to look in the actual HW because
+	 * it is possible for an entry to be learn by HW and before we
+	 * get the interrupt the frame will reach CPU and the CPU will
+	 * add the entry but without the extern_learn flag.
+	 */
+	mac_entry = lan966x_mac_find_entry(lan966x, addr, vid, port->chip_port);
+	if (mac_entry)
+		return lan966x_mac_learn(lan966x, port->chip_port,
+					 addr, vid, ENTRYTYPE_LOCKED);
+
+	mac_entry = lan966x_mac_alloc_entry(lan966x, addr, vid, port->chip_port);
+	if (!mac_entry)
+		return -ENOMEM;
+
+	spin_lock_irqsave(&lan966x->mac_lock, flags);
+	list_add_tail(&mac_entry->list, &lan966x->mac_entries);
+	spin_unlock_irqrestore(&lan966x->mac_lock, flags);
+
+	lan966x_mac_learn(lan966x, port->chip_port, addr, vid, ENTRYTYPE_LOCKED);
+	lan966x_fdb_call_notifiers(SWITCHDEV_FDB_OFFLOADED, addr, vid, port->dev);
+
+	return 0;
+}
+
+int lan966x_mac_del_entry(struct lan966x *lan966x, const unsigned char *addr,
+			  u16 vid)
+{
+	struct lan966x_mac_entry *mac_entry, *tmp;
+	unsigned long flags;
+
+	spin_lock_irqsave(&lan966x->mac_lock, flags);
+	list_for_each_entry_safe(mac_entry, tmp, &lan966x->mac_entries,
+				 list) {
+		if ((vid == 0 || mac_entry->vid == vid) &&
+		    ether_addr_equal(addr, mac_entry->mac)) {
+			list_del(&mac_entry->list);
+			devm_kfree(lan966x->dev, mac_entry);
+
+			lan966x_mac_forget(lan966x, addr, mac_entry->vid,
+					   ENTRYTYPE_LOCKED);
+		}
+	}
+	spin_unlock_irqrestore(&lan966x->mac_lock, flags);
+
+	return 0;
+}
+
 static void lan966x_mac_notifiers(struct lan966x *lan966x,
 				  enum switchdev_notifier_type type,
 				  unsigned char *mac, u32 vid,
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
index 7ee622251019..c6749ef0418a 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
@@ -145,6 +145,15 @@ int lan966x_mac_forget(struct lan966x *lan966x,
 int lan966x_mac_cpu_learn(struct lan966x *lan966x, const char *addr, u16 vid);
 int lan966x_mac_cpu_forget(struct lan966x *lan966x, const char *addr, u16 vid);
 void lan966x_mac_init(struct lan966x *lan966x);
+void lan966x_mac_set_ageing(struct lan966x *lan966x,
+			    u32 ageing);
+int lan966x_mac_del_entry(struct lan966x *lan966x,
+			  const unsigned char *addr,
+			  u16 vid);
+int lan966x_mac_add_entry(struct lan966x *lan966x,
+			  struct lan966x_port *port,
+			  const unsigned char *addr,
+			  u16 vid);
 irqreturn_t lan966x_mac_irq_handler(struct lan966x *lan966x);
 
 static inline void __iomem *lan_addr(void __iomem *base[],
-- 
2.33.0

[PATCH net-next 5/6] net: lan966x: Add vlan support

[Horatiu Vultur]

This adds support for vlan in lan966x.
This allows add/remove front ports from vlans and also allows the CPU
port to be added/remove from vlans. In this way it is possible to
filter frames towards the CPU based on the vlan.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
 .../net/ethernet/microchip/lan966x/Makefile   |   2 +-
 .../ethernet/microchip/lan966x/lan966x_mac.c  |   2 +-
 .../ethernet/microchip/lan966x/lan966x_main.c |  35 +-
 .../ethernet/microchip/lan966x/lan966x_main.h |  39 +-
 .../ethernet/microchip/lan966x/lan966x_vlan.c | 432 ++++++++++++++++++
 5 files changed, 504 insertions(+), 6 deletions(-)
 create mode 100644 drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c

diff --git a/drivers/net/ethernet/microchip/lan966x/Makefile b/drivers/net/ethernet/microchip/lan966x/Makefile
index 2989ba528236..f7e6068a91cb 100644
--- a/drivers/net/ethernet/microchip/lan966x/Makefile
+++ b/drivers/net/ethernet/microchip/lan966x/Makefile
@@ -6,4 +6,4 @@
 obj-$(CONFIG_LAN966X_SWITCH) += lan966x-switch.o
 
 lan966x-switch-objs  := lan966x_main.o lan966x_phylink.o lan966x_port.o \
-			lan966x_mac.o lan966x_ethtool.o
+			lan966x_mac.o lan966x_ethtool.o lan966x_vlan.o
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c b/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
index 690184eba81b..aa72f39bc19d 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
@@ -197,7 +197,7 @@ static void lan966x_fdb_call_notifiers(enum switchdev_notifier_type type,
 	struct switchdev_notifier_fdb_info info = { 0 };
 
 	info.addr = mac;
-	info.vid = vid == PORT_PVID ? 0 : vid;
+	info.vid = vid == UNAWARE_PVID ? 0 : vid;
 	info.offloaded = true;
 	call_switchdev_notifiers(type, dev, &info.info, NULL);
 }
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
index 38868cf184c6..3b6926553e52 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
@@ -103,17 +103,18 @@ static int lan966x_create_targets(struct platform_device *pdev,
 static int lan966x_port_set_mac_address(struct net_device *dev, void *p)
 {
 	struct lan966x_port *port = netdev_priv(dev);
+	u16 pvid = lan966x_vlan_port_get_pvid(port);
 	struct lan966x *lan966x = port->lan966x;
 	const struct sockaddr *addr = p;
 	int ret;
 
 	/* Learn the new net device MAC address in the mac table. */
-	ret = lan966x_mac_cpu_learn(lan966x, addr->sa_data, port->pvid);
+	ret = lan966x_mac_cpu_learn(lan966x, addr->sa_data, pvid);
 	if (ret)
 		return ret;
 
 	/* Then forget the previous one. */
-	ret = lan966x_mac_cpu_forget(lan966x, dev->dev_addr, port->pvid);
+	ret = lan966x_mac_cpu_forget(lan966x, dev->dev_addr, pvid);
 	if (ret)
 		return ret;
 
@@ -283,6 +284,12 @@ static void lan966x_ifh_set_ipv(void *ifh, u64 bypass)
 		IFH_POS_IPV, IFH_LEN * 4, PACK, 0);
 }
 
+static void lan966x_ifh_set_vid(void *ifh, u64 vid)
+{
+	packing(ifh, &vid, IFH_POS_TCI + IFH_WID_TCI - 1,
+		IFH_POS_TCI, IFH_LEN * 4, PACK, 0);
+}
+
 static int lan966x_port_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct lan966x_port *port = netdev_priv(dev);
@@ -294,6 +301,7 @@ static int lan966x_port_xmit(struct sk_buff *skb, struct net_device *dev)
 	lan966x_ifh_set_port(ifh, BIT_ULL(port->chip_port));
 	lan966x_ifh_set_qos_class(ifh, skb->priority >= 7 ? 0x7 : skb->priority);
 	lan966x_ifh_set_ipv(ifh, skb->priority >= 7 ? 0x7 : skb->priority);
+	lan966x_ifh_set_vid(ifh, skb_vlan_tag_get(skb));
 
 	return lan966x_port_ifh_xmit(skb, ifh, dev);
 }
@@ -365,6 +373,18 @@ static int lan966x_port_get_parent_id(struct net_device *dev,
 	return 0;
 }
 
+static int lan966x_port_set_features(struct net_device *dev,
+				     netdev_features_t features)
+{
+	struct lan966x_port *port = netdev_priv(dev);
+	netdev_features_t changed = dev->features ^ features;
+
+	if (changed & NETIF_F_HW_VLAN_CTAG_FILTER)
+		lan966x_vlan_mode(port, features);
+
+	return 0;
+}
+
 static const struct net_device_ops lan966x_port_netdev_ops = {
 	.ndo_open			= lan966x_port_open,
 	.ndo_stop			= lan966x_port_stop,
@@ -376,6 +396,9 @@ static const struct net_device_ops lan966x_port_netdev_ops = {
 	.ndo_get_stats64		= lan966x_stats_get,
 	.ndo_set_mac_address		= lan966x_port_set_mac_address,
 	.ndo_get_port_parent_id		= lan966x_port_get_parent_id,
+	.ndo_set_features		= lan966x_port_set_features,
+	.ndo_vlan_rx_add_vid		= lan966x_vlan_rx_add_vid,
+	.ndo_vlan_rx_kill_vid		= lan966x_vlan_rx_kill_vid,
 };
 
 static int lan966x_port_xtr_status(struct lan966x *lan966x, u8 grp)
@@ -585,7 +608,6 @@ static int lan966x_probe_port(struct lan966x *lan966x, u32 p,
 	port->dev = dev;
 	port->lan966x = lan966x;
 	port->chip_port = p;
-	port->pvid = PORT_PVID;
 	lan966x->ports[p] = port;
 
 	dev->max_mtu = ETH_MAX_MTU;
@@ -638,6 +660,10 @@ static int lan966x_probe_port(struct lan966x *lan966x, u32 p,
 		return err;
 	}
 
+	lan966x_vlan_port_set_vlan_aware(port, 0);
+	lan966x_vlan_port_set_vid(port, UNAWARE_PVID, false, false);
+	lan966x_vlan_port_apply(port);
+
 	return 0;
 }
 
@@ -648,6 +674,9 @@ static void lan966x_init(struct lan966x *lan966x)
 	/* MAC table initialization */
 	lan966x_mac_init(lan966x);
 
+	/* Vlan initialization */
+	lan966x_vlan_init(lan966x);
+
 	/* Flush queues */
 	lan_wr(lan_rd(lan966x, QS_XTR_FLUSH) |
 	       GENMASK(1, 0),
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
index c6749ef0418a..56603b72423c 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
@@ -4,6 +4,7 @@
 #define __LAN966X_MAIN_H__
 
 #include <linux/etherdevice.h>
+#include <linux/if_vlan.h>
 #include <linux/jiffies.h>
 #include <linux/phy.h>
 #include <linux/phylink.h>
@@ -22,7 +23,7 @@
 #define PGID_SRC			80
 #define PGID_ENTRIES			89
 
-#define PORT_PVID			0
+#define UNAWARE_PVID			4095
 
 /* Reserved amount for (SRC, PRIO) at index 8*SRC + PRIO */
 #define QSYS_Q_RSRV			95
@@ -78,6 +79,9 @@ struct lan966x {
 	struct list_head mac_entries;
 	spinlock_t mac_lock; /* lock for mac_entries list */
 
+	u16 vlan_mask[VLAN_N_VID];
+	DECLARE_BITMAP(cpu_vlan_mask, VLAN_N_VID);
+
 	/* stats */
 	const struct lan966x_stat_layout *stats_layout;
 	u32 num_stats;
@@ -109,6 +113,8 @@ struct lan966x_port {
 
 	u8 chip_port;
 	u16 pvid;
+	u16 vid;
+	u8 vlan_aware;
 
 	struct phylink_config phylink_config;
 	struct phylink_pcs phylink_pcs;
@@ -156,6 +162,37 @@ int lan966x_mac_add_entry(struct lan966x *lan966x,
 			  u16 vid);
 irqreturn_t lan966x_mac_irq_handler(struct lan966x *lan966x);
 
+void lan966x_vlan_init(struct lan966x *lan966x);
+void lan966x_vlan_port_apply(struct lan966x_port *port);
+
+int lan966x_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid);
+int lan966x_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid);
+
+void lan966x_vlan_mode(struct lan966x_port *port, netdev_features_t features);
+u16 lan966x_vlan_port_get_pvid(struct lan966x_port *port);
+
+bool lan966x_vlan_port_member_vlan_mask(struct lan966x_port *port, u16 vid);
+bool lan966x_vlan_cpu_member_vlan_mask(struct lan966x *lan966x, u16 vid);
+bool lan966x_vlan_port_any_vlan_mask(struct lan966x *lan966x, u16 vid);
+
+void lan966x_vlan_cpu_set_vlan_aware(struct lan966x_port *port);
+void lan966x_vlan_port_set_vlan_aware(struct lan966x_port *port,
+				      bool vlan_aware);
+int lan966x_vlan_port_set_vid(struct lan966x_port *port, u16 vid,
+			      bool pvid, bool untagged);
+int lan966x_vlan_port_add_vlan(struct lan966x_port *port,
+			       u16 vid,
+			       bool pvid,
+			       bool untagged);
+int lan966x_vlan_port_del_vlan(struct lan966x_port *port,
+			       u16 vid);
+int lan966x_vlan_cpu_add_vlan(struct lan966x *lan966x,
+			      struct net_device *dev,
+			      u16 vid);
+int lan966x_vlan_cpu_del_vlan(struct lan966x *lan966x,
+			      struct net_device *dev,
+			      u16 vid);
+
 static inline void __iomem *lan_addr(void __iomem *base[],
 				     int id, int tinst, int tcnt,
 				     int gbase, int ginst,
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c b/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c
new file mode 100644
index 000000000000..c035f24e77c2
--- /dev/null
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c
@@ -0,0 +1,432 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include "lan966x_main.h"
+
+#define VLANACCESS_CMD_IDLE		0
+#define VLANACCESS_CMD_READ		1
+#define VLANACCESS_CMD_WRITE		2
+#define VLANACCESS_CMD_INIT		3
+
+static int lan966x_vlan_get_status(struct lan966x *lan966x)
+{
+	return lan_rd(lan966x, ANA_VLANACCESS);
+}
+
+static int lan966x_vlan_wait_for_completion(struct lan966x *lan966x)
+{
+	u32 val;
+
+	return readx_poll_timeout(lan966x_vlan_get_status,
+		lan966x, val,
+		(val & ANA_VLANACCESS_VLAN_TBL_CMD) ==
+		VLANACCESS_CMD_IDLE,
+		TABLE_UPDATE_SLEEP_US, TABLE_UPDATE_TIMEOUT_US);
+}
+
+static int lan966x_vlan_set_mask(struct lan966x *lan966x, u16 vid)
+{
+	u16 mask = lan966x->vlan_mask[vid];
+	bool cpu_dis;
+
+	cpu_dis = !(mask & BIT(CPU_PORT));
+
+	/* Set flags and the VID to configure */
+	lan_rmw(ANA_VLANTIDX_VLAN_PGID_CPU_DIS_SET(cpu_dis) |
+		ANA_VLANTIDX_V_INDEX_SET(vid),
+		ANA_VLANTIDX_VLAN_PGID_CPU_DIS |
+		ANA_VLANTIDX_V_INDEX,
+		lan966x, ANA_VLANTIDX);
+
+	/* Set the vlan port members mask */
+	lan_rmw(ANA_VLAN_PORT_MASK_VLAN_PORT_MASK_SET(mask),
+		ANA_VLAN_PORT_MASK_VLAN_PORT_MASK,
+		lan966x, ANA_VLAN_PORT_MASK);
+
+	/* Issue a write command */
+	lan_rmw(ANA_VLANACCESS_VLAN_TBL_CMD_SET(VLANACCESS_CMD_WRITE),
+		ANA_VLANACCESS_VLAN_TBL_CMD,
+		lan966x, ANA_VLANACCESS);
+
+	return lan966x_vlan_wait_for_completion(lan966x);
+}
+
+void lan966x_vlan_init(struct lan966x *lan966x)
+{
+	u16 port, vid;
+
+	/* Clear VLAN table, by default all ports are members of all VLANS */
+	lan_rmw(ANA_VLANACCESS_VLAN_TBL_CMD_SET(VLANACCESS_CMD_INIT),
+		ANA_VLANACCESS_VLAN_TBL_CMD,
+		lan966x, ANA_VLANACCESS);
+	lan966x_vlan_wait_for_completion(lan966x);
+
+	for (vid = 1; vid < VLAN_N_VID; vid++) {
+		lan966x->vlan_mask[vid] = 0;
+		lan966x_vlan_set_mask(lan966x, vid);
+	}
+
+	/* Set all the ports + cpu to be part of UNAWARE_PVID */
+	lan966x->vlan_mask[UNAWARE_PVID] =
+		GENMASK(lan966x->num_phys_ports - 1, 0) | BIT(CPU_PORT);
+	lan966x_vlan_set_mask(lan966x, UNAWARE_PVID);
+
+	/* Configure the CPU port to be vlan aware */
+	lan_wr(ANA_VLAN_CFG_VLAN_VID_SET(0) |
+	       ANA_VLAN_CFG_VLAN_AWARE_ENA_SET(1) |
+	       ANA_VLAN_CFG_VLAN_POP_CNT_SET(1),
+	       lan966x, ANA_VLAN_CFG(CPU_PORT));
+
+	/* Set vlan ingress filter mask to all ports */
+	lan_wr(GENMASK(lan966x->num_phys_ports, 0),
+	       lan966x, ANA_VLANMASK);
+
+	for (port = 0; port < lan966x->num_phys_ports; port++) {
+		lan_wr(0, lan966x, REW_PORT_VLAN_CFG(port));
+		lan_wr(0, lan966x, REW_TAG_CFG(port));
+	}
+}
+
+static int lan966x_vlan_port_add_vlan_mask(struct lan966x_port *port, u16 vid)
+{
+	struct lan966x *lan966x = port->lan966x;
+	u8 p = port->chip_port;
+
+	lan966x->vlan_mask[vid] |= BIT(p);
+	return lan966x_vlan_set_mask(lan966x, vid);
+}
+
+static int lan966x_vlan_port_del_vlan_mask(struct lan966x_port *port, u16 vid)
+{
+	struct lan966x *lan966x = port->lan966x;
+	u8 p = port->chip_port;
+
+	lan966x->vlan_mask[vid] &= ~BIT(p);
+	return lan966x_vlan_set_mask(lan966x, vid);
+}
+
+bool lan966x_vlan_port_member_vlan_mask(struct lan966x_port *port, u16 vid)
+{
+	struct lan966x *lan966x = port->lan966x;
+	u8 p = port->chip_port;
+
+	return lan966x->vlan_mask[vid] & BIT(p);
+}
+
+bool lan966x_vlan_port_any_vlan_mask(struct lan966x *lan966x, u16 vid)
+{
+	return !!(lan966x->vlan_mask[vid] & ~BIT(CPU_PORT));
+}
+
+static int lan966x_vlan_cpu_add_vlan_mask(struct lan966x *lan966x, u16 vid)
+{
+	lan966x->vlan_mask[vid] |= BIT(CPU_PORT);
+	return lan966x_vlan_set_mask(lan966x, vid);
+}
+
+static int lan966x_vlan_cpu_del_vlan_mask(struct lan966x *lan966x, u16 vid)
+{
+	lan966x->vlan_mask[vid] &= ~BIT(CPU_PORT);
+	return lan966x_vlan_set_mask(lan966x, vid);
+}
+
+bool lan966x_vlan_cpu_member_vlan_mask(struct lan966x *lan966x, u16 vid)
+{
+	return lan966x->vlan_mask[vid] & BIT(CPU_PORT);
+}
+
+static void lan966x_vlan_cpu_add_cpu_vlan_mask(struct lan966x *lan966x, u16 vid)
+{
+	set_bit(vid, lan966x->cpu_vlan_mask);
+}
+
+static void lan966x_vlan_cpu_del_cpu_vlan_mask(struct lan966x *lan966x, u16 vid)
+{
+	clear_bit(vid, lan966x->cpu_vlan_mask);
+}
+
+static bool lan966x_vlan_cpu_member_cpu_vlan_mask(struct lan966x *lan966x, u16 vid)
+{
+	return test_bit(vid, lan966x->cpu_vlan_mask);
+}
+
+u16 lan966x_vlan_port_get_pvid(struct lan966x_port *port)
+{
+	return port->vlan_aware ? port->pvid : UNAWARE_PVID;
+}
+
+int lan966x_vlan_port_set_vid(struct lan966x_port *port, u16 vid,
+			      bool pvid, bool untagged)
+{
+	struct lan966x *lan966x = port->lan966x;
+
+	/* Egress vlan classification */
+	if (untagged && port->vid != vid) {
+		if (port->vid) {
+			dev_err(lan966x->dev,
+				"Port already has a native VLAN: %d\n",
+				port->vid);
+			return -EBUSY;
+		}
+		port->vid = vid;
+	}
+
+	/* Default ingress vlan classification */
+	if (pvid)
+		port->pvid = vid;
+
+	return 0;
+}
+
+static int lan966x_vlan_port_remove_vid(struct lan966x_port *port, u16 vid)
+{
+	if (port->pvid == vid)
+		port->pvid = 0;
+
+	if (port->vid == vid)
+		port->vid = 0;
+
+	return 0;
+}
+
+void lan966x_vlan_port_set_vlan_aware(struct lan966x_port *port,
+				      bool vlan_aware)
+{
+	port->vlan_aware = vlan_aware;
+}
+
+void lan966x_vlan_cpu_set_vlan_aware(struct lan966x_port *port)
+{
+	struct lan966x *lan966x = port->lan966x;
+
+	if (!port->vlan_aware) {
+		/* In case of vlan unaware, all the ports will be set in
+		 * UNAWARE_PVID and have their PVID set to this PVID
+		 * The CPU doesn't need to be added because it is always part of
+		 * that vlan, it is required just to add entries in the MAC
+		 * table for the front port and the CPU
+		 */
+		lan966x_mac_cpu_learn(lan966x, port->dev->dev_addr, UNAWARE_PVID);
+
+		lan966x_vlan_port_add_vlan_mask(port, UNAWARE_PVID);
+		lan966x_vlan_port_apply(port);
+	} else {
+		/* In case of vlan aware, just clear what happened when changed
+		 * to vlan unaware
+		 */
+		lan966x_mac_cpu_forget(lan966x, port->dev->dev_addr, UNAWARE_PVID);
+
+		lan966x_vlan_port_del_vlan_mask(port, UNAWARE_PVID);
+		lan966x_vlan_port_apply(port);
+	}
+}
+
+void lan966x_vlan_port_apply(struct lan966x_port *port)
+{
+	struct lan966x *lan966x = port->lan966x;
+	u16 pvid;
+	u32 val;
+
+	pvid = lan966x_vlan_port_get_pvid(port);
+
+	/* Ingress clasification (ANA_PORT_VLAN_CFG) */
+	/* Default vlan to casify for untagged frames (may be zero) */
+	val = ANA_VLAN_CFG_VLAN_VID_SET(pvid);
+	if (port->vlan_aware)
+		val |= ANA_VLAN_CFG_VLAN_AWARE_ENA_SET(1) |
+		       ANA_VLAN_CFG_VLAN_POP_CNT_SET(1);
+
+	lan_rmw(val,
+		ANA_VLAN_CFG_VLAN_VID | ANA_VLAN_CFG_VLAN_AWARE_ENA |
+		ANA_VLAN_CFG_VLAN_POP_CNT,
+		lan966x, ANA_VLAN_CFG(port->chip_port));
+
+	/* Drop frames with multicast source address */
+	val = ANA_DROP_CFG_DROP_MC_SMAC_ENA_SET(1);
+	if (port->vlan_aware && !pvid)
+		/* If port is vlan-aware and tagged, drop untagged and priority
+		 * tagged frames.
+		 */
+		val |= ANA_DROP_CFG_DROP_UNTAGGED_ENA_SET(1) |
+		       ANA_DROP_CFG_DROP_PRIO_S_TAGGED_ENA_SET(1) |
+		       ANA_DROP_CFG_DROP_PRIO_C_TAGGED_ENA_SET(1);
+
+	lan_wr(val, lan966x, ANA_DROP_CFG(port->chip_port));
+
+	/* Egress configuration (REW_TAG_CFG): VLAN tag type to 8021Q */
+	val = REW_TAG_CFG_TAG_TPID_CFG_SET(0);
+	if (port->vlan_aware) {
+		if (port->vid)
+			/* Tag all frames except when VID == DEFAULT_VLAN */
+			val |= REW_TAG_CFG_TAG_CFG_SET(1);
+		else
+			val |= REW_TAG_CFG_TAG_CFG_SET(3);
+	}
+
+	/* Update only some bits in the register */
+	lan_rmw(val,
+		REW_TAG_CFG_TAG_TPID_CFG | REW_TAG_CFG_TAG_CFG,
+		lan966x, REW_TAG_CFG(port->chip_port));
+
+	/* Set default VLAN and tag type to 8021Q */
+	lan_rmw(REW_PORT_VLAN_CFG_PORT_TPID_SET(ETH_P_8021Q) |
+		REW_PORT_VLAN_CFG_PORT_VID_SET(port->vid),
+		REW_PORT_VLAN_CFG_PORT_TPID |
+		REW_PORT_VLAN_CFG_PORT_VID,
+		lan966x, REW_PORT_VLAN_CFG(port->chip_port));
+}
+
+int lan966x_vlan_port_add_vlan(struct lan966x_port *port,
+			       u16 vid,
+			       bool pvid,
+			       bool untagged)
+{
+	struct lan966x *lan966x = port->lan966x;
+
+	/* If the CPU(br) is already part of the vlan then add the MAC
+	 * address of the device in MAC table to copy the frames to the
+	 * CPU(br). If the CPU(br) is not part of the vlan then it would
+	 * just drop the frames.
+	 */
+	if (lan966x_vlan_cpu_member_cpu_vlan_mask(lan966x, vid)) {
+		lan966x_mac_cpu_learn(lan966x, port->dev->dev_addr, vid);
+		lan966x_vlan_cpu_add_vlan_mask(lan966x, vid);
+	}
+
+	lan966x_vlan_port_set_vid(port, vid, pvid, untagged);
+	lan966x_vlan_port_add_vlan_mask(port, vid);
+	lan966x_vlan_port_apply(port);
+
+	return 0;
+}
+
+int lan966x_vlan_port_del_vlan(struct lan966x_port *port,
+			       u16 vid)
+{
+	struct lan966x *lan966x = port->lan966x;
+
+	/* In case the CPU(br) is part of the vlan then remove the MAC entry
+	 * because frame doesn't need to reach to CPU
+	 */
+	if (lan966x_vlan_cpu_member_cpu_vlan_mask(lan966x, vid))
+		lan966x_mac_cpu_forget(lan966x, port->dev->dev_addr, vid);
+
+	lan966x_vlan_port_remove_vid(port, vid);
+	lan966x_vlan_port_del_vlan_mask(port, vid);
+	lan966x_vlan_port_apply(port);
+
+	/* In case there are no other ports in vlan then remove the CPU from
+	 * that vlan but still keep it in the mask because it may be needed
+	 * again then another port gets added in tha vlan
+	 */
+	if (!lan966x_vlan_port_any_vlan_mask(lan966x, vid))
+		lan966x_vlan_cpu_del_vlan_mask(lan966x, vid);
+
+	return 0;
+}
+
+int lan966x_vlan_cpu_add_vlan(struct lan966x *lan966x,
+			      struct net_device *dev,
+			      u16 vid)
+{
+	int p;
+
+	/* Iterate over the ports and see which ones are part of the
+	 * vlan and for those ports add entry in the MAC table to
+	 * copy the frames to the CPU
+	 */
+	for (p = 0; p < lan966x->num_phys_ports; p++) {
+		struct lan966x_port *port = lan966x->ports[p];
+
+		if (!port ||
+		    !lan966x_vlan_port_member_vlan_mask(port, vid))
+			continue;
+
+		lan966x_mac_cpu_learn(lan966x, port->dev->dev_addr, vid);
+	}
+
+	/* Add an entry in the MAC table for the CPU */
+	if (lan966x_vlan_port_any_vlan_mask(lan966x, vid))
+		lan966x_mac_cpu_learn(lan966x, dev->dev_addr, vid);
+
+	/* Add the CPU part of the vlan only if there is another port in that
+	 * vlan otherwise all the broadcast frames in that vlan will go to CPU
+	 * even if none of the ports are in the vlan and then the CPU will just
+	 * need to discard these frames. It is required to store this
+	 * information so when a front port is added then it would add also the
+	 * CPU port.
+	 */
+	if (lan966x_vlan_port_any_vlan_mask(lan966x, vid))
+		lan966x_vlan_cpu_add_vlan_mask(lan966x, vid);
+
+	lan966x_vlan_cpu_add_cpu_vlan_mask(lan966x, vid);
+
+	return 0;
+}
+
+int lan966x_vlan_cpu_del_vlan(struct lan966x *lan966x,
+			      struct net_device *dev,
+			      u16 vid)
+{
+	int p;
+
+	/* Iterate over the ports and see which ones are part of the
+	 * vlan and for those ports remove entry in the MAC table to
+	 * copy the frames to the CPU
+	 */
+	for (p = 0; p < lan966x->num_phys_ports; p++) {
+		struct lan966x_port *port = lan966x->ports[p];
+
+		if (!port ||
+		    !lan966x_vlan_port_member_vlan_mask(port, vid))
+			continue;
+
+		lan966x_mac_cpu_forget(lan966x, port->dev->dev_addr, vid);
+	}
+
+	/* Remove an entry in the MAC table for the CPU */
+	lan966x_mac_cpu_forget(lan966x, dev->dev_addr, vid);
+
+	/* Remove the CPU part of the vlan */
+	lan966x_vlan_cpu_del_cpu_vlan_mask(lan966x, vid);
+	lan966x_vlan_cpu_del_vlan_mask(lan966x, vid);
+
+	return 0;
+}
+
+int lan966x_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
+{
+	struct lan966x_port *port = netdev_priv(dev);
+
+	lan966x_vlan_port_set_vid(port, vid, false, false);
+	lan966x_vlan_port_add_vlan_mask(port, vid);
+	lan966x_vlan_port_apply(port);
+
+	return 0;
+}
+
+int lan966x_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
+			     u16 vid)
+{
+	struct lan966x_port *port = netdev_priv(dev);
+
+	lan966x_vlan_port_remove_vid(port, vid);
+	lan966x_vlan_port_del_vlan_mask(port, vid);
+	lan966x_vlan_port_apply(port);
+
+	return 0;
+}
+
+void lan966x_vlan_mode(struct lan966x_port *port,
+		       netdev_features_t features)
+{
+	struct lan966x *lan966x = port->lan966x;
+	u32 val;
+
+	/* Filtering */
+	val = lan_rd(lan966x, ANA_VLANMASK);
+	if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
+		val |= BIT(port->chip_port);
+	else
+		val &= ~BIT(port->chip_port);
+	lan_wr(val, lan966x, ANA_VLANMASK);
+}
-- 
2.33.0

[PATCH net-next 6/6] net: lan966x: Add switchdev support

[Horatiu Vultur]

This adds support for switchdev in lan966x.
It offloads to the HW basic forwarding and vlan filtering. To be able to
offload this to the HW, it is required to disable promisc mode for ports
that are part of the bridge.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
 .../net/ethernet/microchip/lan966x/Makefile   |   3 +-
 .../ethernet/microchip/lan966x/lan966x_main.c |  41 +-
 .../ethernet/microchip/lan966x/lan966x_main.h |  18 +
 .../microchip/lan966x/lan966x_switchdev.c     | 544 ++++++++++++++++++
 .../ethernet/microchip/lan966x/lan966x_vlan.c |   9 +-
 5 files changed, 603 insertions(+), 12 deletions(-)
 create mode 100644 drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c

diff --git a/drivers/net/ethernet/microchip/lan966x/Makefile b/drivers/net/ethernet/microchip/lan966x/Makefile
index f7e6068a91cb..d82e896c2e53 100644
--- a/drivers/net/ethernet/microchip/lan966x/Makefile
+++ b/drivers/net/ethernet/microchip/lan966x/Makefile
@@ -6,4 +6,5 @@
 obj-$(CONFIG_LAN966X_SWITCH) += lan966x-switch.o
 
 lan966x-switch-objs  := lan966x_main.o lan966x_phylink.o lan966x_port.o \
-			lan966x_mac.o lan966x_ethtool.o lan966x_vlan.o
+			lan966x_mac.o lan966x_ethtool.o lan966x_switchdev.o \
+			lan966x_vlan.o
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
index 3b6926553e52..cc22c5fba5e5 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
@@ -306,7 +306,7 @@ static int lan966x_port_xmit(struct sk_buff *skb, struct net_device *dev)
 	return lan966x_port_ifh_xmit(skb, ifh, dev);
 }
 
-static void lan966x_set_promisc(struct lan966x_port *port, bool enable)
+void lan966x_set_promisc(struct lan966x_port *port, bool enable)
 {
 	struct lan966x *lan966x = port->lan966x;
 
@@ -318,14 +318,18 @@ static void lan966x_set_promisc(struct lan966x_port *port, bool enable)
 static void lan966x_port_change_rx_flags(struct net_device *dev, int flags)
 {
 	struct lan966x_port *port = netdev_priv(dev);
+	bool enable;
 
 	if (!(flags & IFF_PROMISC))
 		return;
 
-	if (dev->flags & IFF_PROMISC)
-		lan966x_set_promisc(port, true);
-	else
-		lan966x_set_promisc(port, false);
+	enable = dev->flags & IFF_PROMISC ? true : false;
+	port->promisc = enable;
+
+	if (port->bridge)
+		return;
+
+	lan966x_set_promisc(port, enable);
 }
 
 static int lan966x_port_change_mtu(struct net_device *dev, int new_mtu)
@@ -340,7 +344,7 @@ static int lan966x_port_change_mtu(struct net_device *dev, int new_mtu)
 	return 0;
 }
 
-static int lan966x_mc_unsync(struct net_device *dev, const unsigned char *addr)
+int lan966x_mc_unsync(struct net_device *dev, const unsigned char *addr)
 {
 	struct lan966x_port *port = netdev_priv(dev);
 	struct lan966x *lan966x = port->lan966x;
@@ -348,7 +352,7 @@ static int lan966x_mc_unsync(struct net_device *dev, const unsigned char *addr)
 	return lan966x_mac_forget(lan966x, addr, port->pvid, ENTRYTYPE_LOCKED);
 }
 
-static int lan966x_mc_sync(struct net_device *dev, const unsigned char *addr)
+int lan966x_mc_sync(struct net_device *dev, const unsigned char *addr)
 {
 	struct lan966x_port *port = netdev_priv(dev);
 	struct lan966x *lan966x = port->lan966x;
@@ -401,6 +405,11 @@ static const struct net_device_ops lan966x_port_netdev_ops = {
 	.ndo_vlan_rx_kill_vid		= lan966x_vlan_rx_kill_vid,
 };
 
+bool lan966x_netdevice_check(const struct net_device *dev)
+{
+	return dev && (dev->netdev_ops == &lan966x_port_netdev_ops);
+}
+
 static int lan966x_port_xtr_status(struct lan966x *lan966x, u8 grp)
 {
 	return lan_rd(lan966x, QS_XTR_RD(grp));
@@ -537,6 +546,11 @@ static irqreturn_t lan966x_xtr_irq_handler(int irq, void *args)
 
 		skb->protocol = eth_type_trans(skb, dev);
 
+#ifdef CONFIG_NET_SWITCHDEV
+		if (lan966x->ports[src_port]->bridge)
+			skb->offload_fwd_mark = 1;
+#endif
+
 		netif_rx_ni(skb);
 		dev->stats.rx_bytes += len;
 		dev->stats.rx_packets++;
@@ -614,13 +628,16 @@ static int lan966x_probe_port(struct lan966x *lan966x, u32 p,
 
 	dev->netdev_ops = &lan966x_port_netdev_ops;
 	dev->ethtool_ops = &lan966x_ethtool_ops;
+	dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER |
+			    NETIF_F_RXFCS;
+	dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
+			 NETIF_F_HW_VLAN_CTAG_TX |
+			 NETIF_F_HW_VLAN_STAG_TX;
+	dev->priv_flags |= IFF_UNICAST_FLT;
 	dev->needed_headroom = IFH_LEN * sizeof(u32);
 
 	eth_hw_addr_gen(dev, lan966x->base_mac, p + 1);
 
-	lan966x_mac_learn(lan966x, PGID_CPU, dev->dev_addr, port->pvid,
-			  ENTRYTYPE_LOCKED);
-
 	port->phylink_config.dev = &port->dev->dev;
 	port->phylink_config.type = PHYLINK_NETDEV;
 	port->phylink_pcs.poll = true;
@@ -944,6 +961,8 @@ static int lan966x_probe(struct platform_device *pdev)
 		lan966x_port_init(lan966x->ports[p]);
 	}
 
+	lan966x_register_notifier_blocks(lan966x);
+
 	return 0;
 
 cleanup_ports:
@@ -962,6 +981,8 @@ static int lan966x_remove(struct platform_device *pdev)
 {
 	struct lan966x *lan966x = platform_get_drvdata(pdev);
 
+	lan966x_unregister_notifier_blocks(lan966x);
+
 	lan966x_cleanup_ports(lan966x);
 
 	cancel_delayed_work_sync(&lan966x->stats_work);
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
index 56603b72423c..512bc699a6f1 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
@@ -79,6 +79,11 @@ struct lan966x {
 	struct list_head mac_entries;
 	spinlock_t mac_lock; /* lock for mac_entries list */
 
+	/* Notifiers */
+	struct notifier_block netdevice_nb;
+	struct notifier_block switchdev_nb;
+	struct notifier_block switchdev_blocking_nb;
+
 	u16 vlan_mask[VLAN_N_VID];
 	DECLARE_BITMAP(cpu_vlan_mask, VLAN_N_VID);
 
@@ -111,6 +116,10 @@ struct lan966x_port {
 	struct net_device *dev;
 	struct lan966x *lan966x;
 
+	struct net_device *bridge;
+	u8 stp_state;
+	u8 promisc;
+
 	u8 chip_port;
 	u16 pvid;
 	u16 vid;
@@ -128,6 +137,14 @@ extern const struct phylink_mac_ops lan966x_phylink_mac_ops;
 extern const struct phylink_pcs_ops lan966x_phylink_pcs_ops;
 extern const struct ethtool_ops lan966x_ethtool_ops;
 
+int lan966x_mc_unsync(struct net_device *dev, const unsigned char *addr);
+int lan966x_mc_sync(struct net_device *dev, const unsigned char *addr);
+
+bool lan966x_netdevice_check(const struct net_device *dev);
+
+int lan966x_register_notifier_blocks(struct lan966x *lan966x);
+void lan966x_unregister_notifier_blocks(struct lan966x *lan966x);
+
 void lan966x_stats_get(struct net_device *dev,
 		       struct rtnl_link_stats64 *stats);
 int lan966x_stats_init(struct lan966x *lan966x);
@@ -138,6 +155,7 @@ void lan966x_port_status_get(struct lan966x_port *port,
 			     struct phylink_link_state *state);
 int lan966x_port_pcs_set(struct lan966x_port *port,
 			 struct lan966x_port_config *config);
+void lan966x_set_promisc(struct lan966x_port *port, bool enable);
 void lan966x_port_init(struct lan966x_port *port);
 
 int lan966x_mac_learn(struct lan966x *lan966x, int port,
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c b/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c
new file mode 100644
index 000000000000..683363549024
--- /dev/null
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c
@@ -0,0 +1,544 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <linux/if_bridge.h>
+#include <net/switchdev.h>
+
+#include "lan966x_main.h"
+
+static struct workqueue_struct *lan966x_owq;
+
+struct lan966x_fdb_event_work {
+	struct work_struct work;
+	struct switchdev_notifier_fdb_info fdb_info;
+	struct net_device *dev;
+	struct lan966x *lan966x;
+	unsigned long event;
+};
+
+static void lan966x_port_attr_bridge_flags(struct lan966x_port *port,
+					   struct switchdev_brport_flags flags)
+{
+	u32 val = lan_rd(port->lan966x, ANA_PGID(PGID_MC));
+
+	val = ANA_PGID_PGID_GET(val);
+
+	if (flags.mask & BR_MCAST_FLOOD) {
+		if (flags.val & BR_MCAST_FLOOD)
+			val |= BIT(port->chip_port);
+		else
+			val &= ~BIT(port->chip_port);
+	}
+
+	lan_rmw(ANA_PGID_PGID_SET(val),
+		ANA_PGID_PGID,
+		port->lan966x, ANA_PGID(PGID_MC));
+}
+
+static u32 lan966x_get_fwd_mask(struct lan966x_port *port)
+{
+	struct net_device *bridge = port->bridge;
+	struct lan966x *lan966x = port->lan966x;
+	u8 ingress_src = port->chip_port;
+	u32 mask = 0;
+	int p;
+
+	for (p = 0; p < lan966x->num_phys_ports; p++) {
+		port = lan966x->ports[p];
+
+		if (!port)
+			continue;
+
+		if (port->stp_state == BR_STATE_FORWARDING &&
+		    port->bridge == bridge)
+			mask |= BIT(p);
+	}
+
+	mask &= ~BIT(ingress_src);
+
+	return mask;
+}
+
+static void lan966x_update_fwd_mask(struct lan966x *lan966x)
+{
+	int p;
+
+	for (p = 0; p < lan966x->num_phys_ports; p++) {
+		struct lan966x_port *port = lan966x->ports[p];
+		unsigned long mask = 0;
+
+		if (port->bridge)
+			mask = lan966x_get_fwd_mask(port);
+
+		mask |= BIT(CPU_PORT);
+
+		lan_wr(ANA_PGID_PGID_SET(mask),
+		       lan966x, ANA_PGID(PGID_SRC + p));
+	}
+}
+
+static void lan966x_attr_stp_state_set(struct lan966x_port *port,
+				       u8 state)
+{
+	struct lan966x *lan966x = port->lan966x;
+	bool learn_ena = 0;
+
+	port->stp_state = state;
+
+	if (state == BR_STATE_FORWARDING || state == BR_STATE_LEARNING)
+		learn_ena = 1;
+
+	lan_rmw(ANA_PORT_CFG_LEARN_ENA_SET(learn_ena),
+		ANA_PORT_CFG_LEARN_ENA,
+		lan966x, ANA_PORT_CFG(port->chip_port));
+
+	lan966x_update_fwd_mask(lan966x);
+}
+
+static void lan966x_port_attr_ageing_set(struct lan966x_port *port,
+					 unsigned long ageing_clock_t)
+{
+	unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
+	u32 ageing_time = jiffies_to_msecs(ageing_jiffies) / 1000;
+
+	lan966x_mac_set_ageing(port->lan966x, ageing_time);
+}
+
+static int lan966x_port_attr_set(struct net_device *dev, const void *ctx,
+				 const struct switchdev_attr *attr,
+				 struct netlink_ext_ack *extack)
+{
+	struct lan966x_port *port = netdev_priv(dev);
+
+	switch (attr->id) {
+	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
+		lan966x_port_attr_bridge_flags(port, attr->u.brport_flags);
+		break;
+	case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
+		lan966x_attr_stp_state_set(port, attr->u.stp_state);
+		break;
+	case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
+		lan966x_port_attr_ageing_set(port, attr->u.ageing_time);
+		break;
+	case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
+		lan966x_vlan_port_set_vlan_aware(port, attr->u.vlan_filtering);
+		lan966x_vlan_port_apply(port);
+		lan966x_vlan_cpu_set_vlan_aware(port);
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+static int lan966x_port_bridge_join(struct lan966x_port *port,
+				    struct net_device *bridge,
+				    struct netlink_ext_ack *extack)
+{
+	struct net_device *dev = port->dev;
+	int err;
+
+	err = switchdev_bridge_port_offload(dev, dev, NULL, NULL, NULL,
+					    false, extack);
+	if (err)
+		return err;
+
+	port->bridge = bridge;
+
+	/* Port enters in bridge mode therefor don't need to copy to CPU
+	 * frames for multicast in case the bridge is not requesting them
+	 */
+	__dev_mc_unsync(dev, lan966x_mc_unsync);
+
+	/* make sure that the promisc is disabled when entering under the bridge
+	 * because we don't want all the frames to come to CPU
+	 */
+	lan966x_set_promisc(port, false);
+
+	return 0;
+}
+
+static void lan966x_port_bridge_leave(struct lan966x_port *port,
+				      struct net_device *bridge)
+{
+	struct lan966x *lan966x = port->lan966x;
+
+	switchdev_bridge_port_unoffload(port->dev, NULL, NULL, NULL);
+	port->bridge = NULL;
+
+	/* Set the port back to host mode */
+	lan966x_vlan_port_set_vlan_aware(port, 0);
+	lan966x_vlan_port_set_vid(port, UNAWARE_PVID, false, false);
+	lan966x_vlan_port_apply(port);
+
+	lan966x_mac_cpu_learn(lan966x, port->dev->dev_addr, UNAWARE_PVID);
+
+	/* Port enters in host more therefore restore mc list */
+	__dev_mc_sync(port->dev, lan966x_mc_sync, lan966x_mc_unsync);
+
+	/* Restore back the promisc as it was before the interfaces was added to
+	 * the bridge
+	 */
+	lan966x_set_promisc(port, port->promisc);
+}
+
+static int lan966x_port_changeupper(struct net_device *dev,
+				    struct netdev_notifier_changeupper_info *info)
+{
+	struct lan966x_port *port = netdev_priv(dev);
+	struct netlink_ext_ack *extack;
+	int err = 0;
+
+	extack = netdev_notifier_info_to_extack(&info->info);
+
+	if (netif_is_bridge_master(info->upper_dev)) {
+		if (info->linking)
+			err = lan966x_port_bridge_join(port, info->upper_dev,
+						       extack);
+		else
+			lan966x_port_bridge_leave(port, info->upper_dev);
+	}
+
+	return err;
+}
+
+static int lan966x_port_add_addr(struct net_device *dev, bool up)
+{
+	struct lan966x_port *port = netdev_priv(dev);
+	struct lan966x *lan966x = port->lan966x;
+	u16 vid;
+
+	vid = lan966x_vlan_port_get_pvid(port);
+
+	if (up)
+		lan966x_mac_cpu_learn(lan966x, dev->dev_addr, vid);
+	else
+		lan966x_mac_cpu_forget(lan966x, dev->dev_addr, vid);
+
+	return 0;
+}
+
+static int lan966x_netdevice_port_event(struct net_device *dev,
+					struct notifier_block *nb,
+					unsigned long event, void *ptr)
+{
+	int err = 0;
+
+	if (!lan966x_netdevice_check(dev))
+		return 0;
+
+	switch (event) {
+	case NETDEV_CHANGEUPPER:
+		err = lan966x_port_changeupper(dev, ptr);
+		break;
+	case NETDEV_PRE_UP:
+		err = lan966x_port_add_addr(dev, true);
+		break;
+	case NETDEV_DOWN:
+		err = lan966x_port_add_addr(dev, false);
+		break;
+	}
+
+	return err;
+}
+
+static int lan966x_netdevice_event(struct notifier_block *nb,
+				   unsigned long event, void *ptr)
+{
+	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+	int ret;
+
+	ret = lan966x_netdevice_port_event(dev, nb, event, ptr);
+
+	return notifier_from_errno(ret);
+}
+
+static void lan966x_fdb_event_work(struct work_struct *work)
+{
+	struct lan966x_fdb_event_work *fdb_work =
+		container_of(work, struct lan966x_fdb_event_work, work);
+	struct switchdev_notifier_fdb_info *fdb_info;
+	struct net_device *dev = fdb_work->dev;
+	struct lan966x_port *port;
+	struct lan966x *lan966x;
+
+	rtnl_lock();
+
+	fdb_info = &fdb_work->fdb_info;
+	lan966x = fdb_work->lan966x;
+
+	if (lan966x_netdevice_check(dev)) {
+		port = netdev_priv(dev);
+
+		switch (fdb_work->event) {
+		case SWITCHDEV_FDB_ADD_TO_DEVICE:
+			if (!fdb_info->added_by_user)
+				break;
+			lan966x_mac_add_entry(lan966x, port, fdb_info->addr,
+					      fdb_info->vid);
+			break;
+		case SWITCHDEV_FDB_DEL_TO_DEVICE:
+			if (!fdb_info->added_by_user)
+				break;
+			lan966x_mac_del_entry(lan966x, fdb_info->addr, fdb_info->vid);
+			break;
+		}
+	} else {
+		if (!netif_is_bridge_master(dev))
+			goto out;
+
+		/* If the CPU is not part of the vlan then there is no point
+		 * to copy the frames to the CPU because they will be dropped
+		 */
+		if (!lan966x_vlan_cpu_member_vlan_mask(lan966x, fdb_info->vid))
+			goto out;
+
+		/* In case the bridge is called */
+		switch (fdb_work->event) {
+		case SWITCHDEV_FDB_ADD_TO_DEVICE:
+			/* If there is no front port in this vlan, there is no
+			 * point to copy the frame to CPU because it would be
+			 * just dropped at later point. So add it only if
+			 * there is a port
+			 */
+			if (!lan966x_vlan_port_any_vlan_mask(lan966x, fdb_info->vid))
+				break;
+
+			lan966x_mac_cpu_learn(lan966x, fdb_info->addr, fdb_info->vid);
+			break;
+		case SWITCHDEV_FDB_DEL_TO_DEVICE:
+			/* It is OK to always forget the entry it */
+			lan966x_mac_cpu_forget(lan966x, fdb_info->addr, fdb_info->vid);
+			break;
+		}
+	}
+
+out:
+	rtnl_unlock();
+	kfree(fdb_work->fdb_info.addr);
+	kfree(fdb_work);
+	dev_put(dev);
+}
+
+static int lan966x_switchdev_event(struct notifier_block *nb,
+				   unsigned long event, void *ptr)
+{
+	struct lan966x *lan966x = container_of(nb, struct lan966x, switchdev_nb);
+	struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
+	struct switchdev_notifier_fdb_info *fdb_info;
+	struct switchdev_notifier_info *info = ptr;
+	struct lan966x_fdb_event_work *fdb_work;
+	int err;
+
+	switch (event) {
+	case SWITCHDEV_PORT_ATTR_SET:
+		err = switchdev_handle_port_attr_set(dev, ptr,
+						     lan966x_netdevice_check,
+						     lan966x_port_attr_set);
+		return notifier_from_errno(err);
+	case SWITCHDEV_FDB_ADD_TO_DEVICE:
+		fallthrough;
+	case SWITCHDEV_FDB_DEL_TO_DEVICE:
+		fdb_work = kzalloc(sizeof(*fdb_work), GFP_ATOMIC);
+		if (!fdb_work)
+			return NOTIFY_BAD;
+
+		fdb_info = container_of(info,
+					struct switchdev_notifier_fdb_info,
+					info);
+
+		fdb_work->dev = dev;
+		fdb_work->lan966x = lan966x;
+		fdb_work->event = event;
+		INIT_WORK(&fdb_work->work, lan966x_fdb_event_work);
+		memcpy(&fdb_work->fdb_info, ptr, sizeof(fdb_work->fdb_info));
+		fdb_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
+		if (!fdb_work->fdb_info.addr)
+			goto err_addr_alloc;
+
+		ether_addr_copy((u8 *)fdb_work->fdb_info.addr, fdb_info->addr);
+		dev_hold(dev);
+
+		queue_work(lan966x_owq, &fdb_work->work);
+		break;
+	}
+
+	return NOTIFY_DONE;
+err_addr_alloc:
+	kfree(fdb_work);
+	return NOTIFY_BAD;
+}
+
+static int lan966x_handle_port_vlan_add(struct net_device *dev,
+					struct notifier_block *nb,
+					const struct switchdev_obj_port_vlan *v)
+{
+	struct lan966x_port *port;
+	struct lan966x *lan966x;
+
+	/* When adding a port to a vlan, we get a callback for the port but
+	 * also for the bridge. When get the callback for the bridge just bail
+	 * out. Then when the bridge is added to the vlan, then we get a
+	 * callback here but in this case the flags has set:
+	 * BRIDGE_VLAN_INFO_BRENTRY. In this case it means that the CPU
+	 * port is added to the vlan, so the broadcast frames and unicast frames
+	 * with dmac of the bridge should be foward to CPU.
+	 */
+	if (netif_is_bridge_master(dev) &&
+	    !(v->flags & BRIDGE_VLAN_INFO_BRENTRY))
+		return 0;
+
+	lan966x = container_of(nb, struct lan966x, switchdev_blocking_nb);
+
+	/* In case the port gets called */
+	if (!(netif_is_bridge_master(dev))) {
+		if (!lan966x_netdevice_check(dev))
+			return -EOPNOTSUPP;
+
+		port = netdev_priv(dev);
+		return lan966x_vlan_port_add_vlan(port, v->vid,
+						  v->flags & BRIDGE_VLAN_INFO_PVID,
+						  v->flags & BRIDGE_VLAN_INFO_UNTAGGED);
+	}
+
+	/* In case the bridge gets called */
+	if (netif_is_bridge_master(dev))
+		return lan966x_vlan_cpu_add_vlan(lan966x, dev, v->vid);
+
+	return 0;
+}
+
+static int lan966x_handle_port_obj_add(struct net_device *dev,
+				       struct notifier_block *nb,
+				       struct switchdev_notifier_port_obj_info *info)
+{
+	const struct switchdev_obj *obj = info->obj;
+	int err;
+
+	switch (obj->id) {
+	case SWITCHDEV_OBJ_ID_PORT_VLAN:
+		err = lan966x_handle_port_vlan_add(dev, nb,
+						   SWITCHDEV_OBJ_PORT_VLAN(obj));
+		break;
+	default:
+		err = -EOPNOTSUPP;
+		break;
+	}
+
+	info->handled = true;
+	return err;
+}
+
+static int lan966x_handle_port_vlan_del(struct net_device *dev,
+					struct notifier_block *nb,
+					const struct switchdev_obj_port_vlan *v)
+{
+	struct lan966x_port *port;
+	struct lan966x *lan966x;
+
+	lan966x = container_of(nb, struct lan966x, switchdev_blocking_nb);
+
+	/* In case the physical port gets called */
+	if (!netif_is_bridge_master(dev)) {
+		if (!lan966x_netdevice_check(dev))
+			return -EOPNOTSUPP;
+
+		port = netdev_priv(dev);
+		return lan966x_vlan_port_del_vlan(port, v->vid);
+	}
+
+	/* In case the bridge gets called */
+	if (netif_is_bridge_master(dev))
+		return lan966x_vlan_cpu_del_vlan(lan966x, dev, v->vid);
+
+	return 0;
+}
+
+static int lan966x_handle_port_obj_del(struct net_device *dev,
+				       struct notifier_block *nb,
+				       struct switchdev_notifier_port_obj_info *info)
+{
+	const struct switchdev_obj *obj = info->obj;
+	int err;
+
+	switch (obj->id) {
+	case SWITCHDEV_OBJ_ID_PORT_VLAN:
+		err = lan966x_handle_port_vlan_del(dev, nb,
+						   SWITCHDEV_OBJ_PORT_VLAN(obj));
+		break;
+	default:
+		err = -EOPNOTSUPP;
+		break;
+	}
+
+	info->handled = true;
+	return err;
+}
+
+static int lan966x_switchdev_blocking_event(struct notifier_block *nb,
+					    unsigned long event,
+					    void *ptr)
+{
+	struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
+	int err;
+
+	switch (event) {
+	case SWITCHDEV_PORT_OBJ_ADD:
+		err = lan966x_handle_port_obj_add(dev, nb, ptr);
+		return notifier_from_errno(err);
+	case SWITCHDEV_PORT_OBJ_DEL:
+		err = lan966x_handle_port_obj_del(dev, nb, ptr);
+		return notifier_from_errno(err);
+	case SWITCHDEV_PORT_ATTR_SET:
+		err = switchdev_handle_port_attr_set(dev, ptr,
+						     lan966x_netdevice_check,
+						     lan966x_port_attr_set);
+		return notifier_from_errno(err);
+	}
+
+	return NOTIFY_DONE;
+}
+
+int lan966x_register_notifier_blocks(struct lan966x *lan966x)
+{
+	int err;
+
+	lan966x->netdevice_nb.notifier_call = lan966x_netdevice_event;
+	err = register_netdevice_notifier(&lan966x->netdevice_nb);
+	if (err)
+		return err;
+
+	lan966x->switchdev_nb.notifier_call = lan966x_switchdev_event;
+	err = register_switchdev_notifier(&lan966x->switchdev_nb);
+	if (err)
+		goto err_switchdev_nb;
+
+	lan966x->switchdev_blocking_nb.notifier_call = lan966x_switchdev_blocking_event;
+	err = register_switchdev_blocking_notifier(&lan966x->switchdev_blocking_nb);
+	if (err)
+		goto err_switchdev_blocking_nb;
+
+	lan966x_owq = alloc_ordered_workqueue("lan966x_order", 0);
+	if (!lan966x_owq) {
+		err = -ENOMEM;
+		goto err_switchdev_blocking_nb;
+	}
+
+	return 0;
+
+err_switchdev_blocking_nb:
+	unregister_switchdev_notifier(&lan966x->switchdev_nb);
+err_switchdev_nb:
+	unregister_netdevice_notifier(&lan966x->netdevice_nb);
+
+	return err;
+}
+
+void lan966x_unregister_notifier_blocks(struct lan966x *lan966x)
+{
+	destroy_workqueue(lan966x_owq);
+
+	unregister_switchdev_blocking_notifier(&lan966x->switchdev_blocking_nb);
+	unregister_switchdev_notifier(&lan966x->switchdev_nb);
+	unregister_netdevice_notifier(&lan966x->netdevice_nb);
+}
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c b/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c
index c035f24e77c2..cec35de078fc 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c
@@ -206,6 +206,8 @@ void lan966x_vlan_cpu_set_vlan_aware(struct lan966x_port *port)
 		 * table for the front port and the CPU
 		 */
 		lan966x_mac_cpu_learn(lan966x, port->dev->dev_addr, UNAWARE_PVID);
+		lan966x_mac_cpu_learn(lan966x, port->bridge->dev_addr,
+				      UNAWARE_PVID);
 
 		lan966x_vlan_port_add_vlan_mask(port, UNAWARE_PVID);
 		lan966x_vlan_port_apply(port);
@@ -214,6 +216,8 @@ void lan966x_vlan_cpu_set_vlan_aware(struct lan966x_port *port)
 		 * to vlan unaware
 		 */
 		lan966x_mac_cpu_forget(lan966x, port->dev->dev_addr, UNAWARE_PVID);
+		lan966x_mac_cpu_forget(lan966x, port->bridge->dev_addr,
+				       UNAWARE_PVID);
 
 		lan966x_vlan_port_del_vlan_mask(port, UNAWARE_PVID);
 		lan966x_vlan_port_apply(port);
@@ -289,6 +293,7 @@ int lan966x_vlan_port_add_vlan(struct lan966x_port *port,
 	 */
 	if (lan966x_vlan_cpu_member_cpu_vlan_mask(lan966x, vid)) {
 		lan966x_mac_cpu_learn(lan966x, port->dev->dev_addr, vid);
+		lan966x_mac_cpu_learn(lan966x, port->bridge->dev_addr, vid);
 		lan966x_vlan_cpu_add_vlan_mask(lan966x, vid);
 	}
 
@@ -318,8 +323,10 @@ int lan966x_vlan_port_del_vlan(struct lan966x_port *port,
 	 * that vlan but still keep it in the mask because it may be needed
 	 * again then another port gets added in tha vlan
 	 */
-	if (!lan966x_vlan_port_any_vlan_mask(lan966x, vid))
+	if (!lan966x_vlan_port_any_vlan_mask(lan966x, vid)) {
+		lan966x_mac_cpu_forget(lan966x, port->bridge->dev_addr, vid);
 		lan966x_vlan_cpu_del_vlan_mask(lan966x, vid);
+	}
 
 	return 0;
 }
-- 
2.33.0

Re: [PATCH net-next 3/6] net: lan966x: add support for interrupts from analyzer

[Jakub Kicinski]

On Fri, 3 Dec 2021 11:46:42 +0100 Horatiu Vultur wrote:
> This patch adds support for handling the interrupts generated by the
> analyzer. Currently, only the MAC table generates these interrupts.
> The MAC table will generate an interrupt whenever it learns or forgets
> an entry in the table. It is the SW responsibility figure out which
> entries were added/removed.
> 
> Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>

> +static struct lan966x_mac_entry *lan966x_mac_alloc_entry(struct lan966x *lan966x,
> +							 const unsigned char *mac,
> +							 u16 vid, u16 port_index)
> +{
> +	struct lan966x_mac_entry *mac_entry;
> +
> +	mac_entry = devm_kzalloc(lan966x->dev,
> +				 sizeof(*mac_entry), GFP_ATOMIC);

Is it really necessary to use devm_ allocation for the mac entries?
It's 2x memory overhead.

Also why GFP_ATOMIC? Memory allocations are _a lot_ less likely with
GFP_KERNEL.

> +	if (!mac_entry)
> +		return NULL;
> +
> +	memcpy(mac_entry->mac, mac, ETH_ALEN);
> +	mac_entry->vid = vid;
> +	mac_entry->port_index = port_index;
> +	mac_entry->row = LAN966X_MAC_INVALID_ROW;
> +	return mac_entry;
> +}

> +static void lan966x_mac_process_raw_entry(struct lan966x_mac_raw_entry *raw_entry,
> +					  u8 *mac, u16 *vid, u32 *dest_idx)
> +{
> +	mac[0] = (raw_entry->mach >> 8)  & 0xff;
> +	mac[1] = (raw_entry->mach >> 0)  & 0xff;
> +	mac[2] = (raw_entry->macl >> 24) & 0xff;
> +	mac[3] = (raw_entry->macl >> 16) & 0xff;
> +	mac[4] = (raw_entry->macl >> 8)  & 0xff;
> +	mac[5] = (raw_entry->macl >> 0)  & 0xff;
> +
> +	*vid = (raw_entry->mach >> 16) & 0xfff;
> +	*dest_idx  = ANA_MACACCESS_DEST_IDX_GET(raw_entry->maca);

Double space before =

> +}
> +
> +static void lan966x_mac_irq_process(struct lan966x *lan966x, u32 row,
> +				    struct lan966x_mac_raw_entry *raw_entries)
> +{
> +	struct lan966x_mac_entry *mac_entry, *tmp;
> +	unsigned long flags;
> +	char mac[ETH_ALEN];
> +	u32 dest_idx;
> +	u32 column;
> +	u16 vid;
> +
> +	spin_lock_irqsave(&lan966x->mac_lock, flags);
> +	list_for_each_entry_safe(mac_entry, tmp, &lan966x->mac_entries, list) {
> +		bool founded = false;

s/founded/found/

> +		if (mac_entry->row != row)
> +			continue;
> +
> +		for (column = 0; column < LAN966X_MAC_COLUMNS; ++column) {
> +			/* All the valid entries are at the start of the row,
> +			 * so when get one invalid entry it can just skip the
> +			 * rest of the columns
> +			 */
> +			if (!ANA_MACACCESS_VALID_GET(raw_entries[column].maca))
> +				break;
> +
> +			lan966x_mac_process_raw_entry(&raw_entries[column],
> +						      mac, &vid, &dest_idx);
> +			WARN_ON(dest_idx > lan966x->num_phys_ports);
> +
> +			/* If the entry in SW is found, then there is nothing
> +			 * to do
> +			 */
> +			if (mac_entry->vid == vid &&
> +			    ether_addr_equal(mac_entry->mac, mac) &&

You need to add __aligned(2) to mac, ether_addr_equal() needs aligned
arguments.

> +			    mac_entry->port_index == dest_idx) {
> +				raw_entries[column].process = true;
> +				founded = true;
> +				break;
> +			}
> +		}

Re: [PATCH net-next 3/6] net: lan966x: add support for interrupts from analyzer

[Horatiu Vultur]

The 12/06/2021 18:24, Jakub Kicinski wrote:

Hi Jakub,

> 
> On Fri, 3 Dec 2021 11:46:42 +0100 Horatiu Vultur wrote:
> > This patch adds support for handling the interrupts generated by the
> > analyzer. Currently, only the MAC table generates these interrupts.
> > The MAC table will generate an interrupt whenever it learns or forgets
> > an entry in the table. It is the SW responsibility figure out which
> > entries were added/removed.
> >
> > Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
> 
> > +static struct lan966x_mac_entry *lan966x_mac_alloc_entry(struct lan966x *lan966x,
> > +                                                      const unsigned char *mac,
> > +                                                      u16 vid, u16 port_index)
> > +{
> > +     struct lan966x_mac_entry *mac_entry;
> > +
> > +     mac_entry = devm_kzalloc(lan966x->dev,
> > +                              sizeof(*mac_entry), GFP_ATOMIC);
> 
> Is it really necessary to use devm_ allocation for the mac entries?
> It's 2x memory overhead.

It is not necessary.

> 
> Also why GFP_ATOMIC? Memory allocations are _a lot_ less likely with
> GFP_KERNEL.

Initially I thought this is called also in some context where it
couldn't sleep. But I was wrong.

I will change these in the next version.

> 
> > +     if (!mac_entry)
> > +             return NULL;
> > +
> > +     memcpy(mac_entry->mac, mac, ETH_ALEN);
> > +     mac_entry->vid = vid;
> > +     mac_entry->port_index = port_index;
> > +     mac_entry->row = LAN966X_MAC_INVALID_ROW;
> > +     return mac_entry;
> > +}
> 
> > +static void lan966x_mac_process_raw_entry(struct lan966x_mac_raw_entry *raw_entry,
> > +                                       u8 *mac, u16 *vid, u32 *dest_idx)
> > +{
> > +     mac[0] = (raw_entry->mach >> 8)  & 0xff;
> > +     mac[1] = (raw_entry->mach >> 0)  & 0xff;
> > +     mac[2] = (raw_entry->macl >> 24) & 0xff;
> > +     mac[3] = (raw_entry->macl >> 16) & 0xff;
> > +     mac[4] = (raw_entry->macl >> 8)  & 0xff;
> > +     mac[5] = (raw_entry->macl >> 0)  & 0xff;
> > +
> > +     *vid = (raw_entry->mach >> 16) & 0xfff;
> > +     *dest_idx  = ANA_MACACCESS_DEST_IDX_GET(raw_entry->maca);
> 
> Double space before =
> 
> > +}
> > +
> > +static void lan966x_mac_irq_process(struct lan966x *lan966x, u32 row,
> > +                                 struct lan966x_mac_raw_entry *raw_entries)
> > +{
> > +     struct lan966x_mac_entry *mac_entry, *tmp;
> > +     unsigned long flags;
> > +     char mac[ETH_ALEN];
> > +     u32 dest_idx;
> > +     u32 column;
> > +     u16 vid;
> > +
> > +     spin_lock_irqsave(&lan966x->mac_lock, flags);
> > +     list_for_each_entry_safe(mac_entry, tmp, &lan966x->mac_entries, list) {
> > +             bool founded = false;
> 
> s/founded/found/
> 
> > +             if (mac_entry->row != row)
> > +                     continue;
> > +
> > +             for (column = 0; column < LAN966X_MAC_COLUMNS; ++column) {
> > +                     /* All the valid entries are at the start of the row,
> > +                      * so when get one invalid entry it can just skip the
> > +                      * rest of the columns
> > +                      */
> > +                     if (!ANA_MACACCESS_VALID_GET(raw_entries[column].maca))
> > +                             break;
> > +
> > +                     lan966x_mac_process_raw_entry(&raw_entries[column],
> > +                                                   mac, &vid, &dest_idx);
> > +                     WARN_ON(dest_idx > lan966x->num_phys_ports);
> > +
> > +                     /* If the entry in SW is found, then there is nothing
> > +                      * to do
> > +                      */
> > +                     if (mac_entry->vid == vid &&
> > +                         ether_addr_equal(mac_entry->mac, mac) &&
> 
> You need to add __aligned(2) to mac, ether_addr_equal() needs aligned
> arguments.
> 
> > +                         mac_entry->port_index == dest_idx) {
> > +                             raw_entries[column].process = true;
> > +                             founded = true;
> > +                             break;
> > +                     }
> > +             }

-- 
/Horatiu