be2net: Support for WoL using magic packet after suspend.

Add support for WOL using Magic Packet after suspend is done.

Signed-off-by: Sarveshwar Bandi <sarveshwarb@serverengines.com>
Signed-off-by: Ajit Khaparde <ajitk@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 128 insertions, 0 deletions

diff --git a/drivers/net/benet/be.h b/drivers/net/benet/be.h
index 12247480a1f8..e71cc5949413 100644
--- a/drivers/net/benet/be.h
+++ b/drivers/net/benet/be.h
@@ -269,6 +269,7 @@ struct be_adapter {
         bool link_up;
         u32 port_num;
         bool promiscuous;
+        bool wol;
         u32 cap;
         u32 rx_fc;              /* Rx flow control */
         u32 tx_fc;              /* Tx flow control */
diff --git a/drivers/net/benet/be_cmds.c b/drivers/net/benet/be_cmds.c
index 5ec61de3b97f..bee7b822d120 100644
--- a/drivers/net/benet/be_cmds.c
+++ b/drivers/net/benet/be_cmds.c
@@ -1442,3 +1442,39 @@ err:
         spin_unlock_bh(&adapter->mcc_lock);
         return status;
 }
+
+extern int be_cmd_enable_magic_wol(struct be_adapter *adapter, u8 *mac,
+                                struct be_dma_mem *nonemb_cmd)
+{
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_acpi_wol_magic_config *req;
+        struct be_sge *sge;
+        int status;
+
+        spin_lock_bh(&adapter->mcc_lock);
+
+        wrb = wrb_from_mccq(adapter);
+        if (!wrb) {
+                status = -EBUSY;
+                goto err;
+        }
+        req = nonemb_cmd->va;
+        sge = nonembedded_sgl(wrb);
+
+        be_wrb_hdr_prepare(wrb, sizeof(*req), false, 1,
+                        OPCODE_ETH_ACPI_WOL_MAGIC_CONFIG);
+
+        be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ETH,
+                OPCODE_ETH_ACPI_WOL_MAGIC_CONFIG, sizeof(*req));
+        memcpy(req->magic_mac, mac, ETH_ALEN);
+
+        sge->pa_hi = cpu_to_le32(upper_32_bits(nonemb_cmd->dma));
+        sge->pa_lo = cpu_to_le32(nonemb_cmd->dma & 0xFFFFFFFF);
+        sge->len = cpu_to_le32(nonemb_cmd->size);
+
+        status = be_mcc_notify_wait(adapter);
+
+err:
+        spin_unlock_bh(&adapter->mcc_lock);
+        return status;
+}
diff --git a/drivers/net/benet/be_cmds.h b/drivers/net/benet/be_cmds.h
index 8ec6528cb054..e8512a144f5e 100644
--- a/drivers/net/benet/be_cmds.h
+++ b/drivers/net/benet/be_cmds.h
@@ -150,6 +150,7 @@ struct be_mcc_mailbox {
 #define OPCODE_ETH_RX_CREATE                            8
 #define OPCODE_ETH_TX_DESTROY                           9
 #define OPCODE_ETH_RX_DESTROY                           10
+#define OPCODE_ETH_ACPI_WOL_MAGIC_CONFIG                12
 
 struct be_cmd_req_hdr {
         u8 opcode;              /* dword 0 */
@@ -788,6 +789,14 @@ struct be_cmd_write_flashrom {
         struct flashrom_params params;
 };
 
+/************************ WOL *******************************/
+struct be_cmd_req_acpi_wol_magic_config{
+        struct be_cmd_req_hdr hdr;
+        u32 rsvd0[145];
+        u8 magic_mac[6];
+        u8 rsvd2[2];
+} __packed;
+
 extern int be_pci_fnum_get(struct be_adapter *adapter);
 extern int be_cmd_POST(struct be_adapter *adapter);
 extern int be_cmd_mac_addr_query(struct be_adapter *adapter, u8 *mac_addr,
@@ -851,5 +860,7 @@ extern int be_cmd_write_flashrom(struct be_adapter *adapter,
                         struct be_dma_mem *cmd, u32 flash_oper,
                         u32 flash_opcode, u32 buf_size);
 extern int be_cmd_get_flash_crc(struct be_adapter *adapter, u8 *flashed_crc);
+extern int be_cmd_enable_magic_wol(struct be_adapter *adapter, u8 *mac,
+                                struct be_dma_mem *nonemb_cmd);
 extern int be_cmd_fw_init(struct be_adapter *adapter);
 extern int be_cmd_fw_clean(struct be_adapter *adapter);
diff --git a/drivers/net/benet/be_ethtool.c b/drivers/net/benet/be_ethtool.c
index 329560f9e543..83a2fc703995 100644
--- a/drivers/net/benet/be_ethtool.c
+++ b/drivers/net/benet/be_ethtool.c
@@ -411,6 +411,36 @@ be_phys_id(struct net_device *netdev, u32 data)
         return status;
 }
 
+static void
+be_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
+{
+        struct be_adapter *adapter = netdev_priv(netdev);
+
+        wol->supported = WAKE_MAGIC;
+        if (adapter->wol)
+                wol->wolopts = WAKE_MAGIC;
+        else
+                wol->wolopts = 0;
+        memset(&wol->sopass, 0, sizeof(wol->sopass));
+        return;
+}
+
+static int
+be_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
+{
+        struct be_adapter *adapter = netdev_priv(netdev);
+
+        if (wol->wolopts & ~WAKE_MAGIC)
+                return -EINVAL;
+
+        if (wol->wolopts & WAKE_MAGIC)
+                adapter->wol = true;
+        else
+                adapter->wol = false;
+
+        return 0;
+}
+
 static int
 be_do_flash(struct net_device *netdev, struct ethtool_flash *efl)
 {
@@ -428,6 +458,8 @@ be_do_flash(struct net_device *netdev, struct ethtool_flash *efl)
 const struct ethtool_ops be_ethtool_ops = {
         .get_settings = be_get_settings,
         .get_drvinfo = be_get_drvinfo,
+        .get_wol = be_get_wol,
+        .set_wol = be_set_wol,
         .get_link = ethtool_op_get_link,
         .get_coalesce = be_get_coalesce,
         .set_coalesce = be_set_coalesce,
diff --git a/drivers/net/benet/be_hw.h b/drivers/net/benet/be_hw.h
index f53d5ca2da9e..e2b3beffd49d 100644
--- a/drivers/net/benet/be_hw.h
+++ b/drivers/net/benet/be_hw.h
@@ -52,6 +52,10 @@
  */
 #define MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK      (1 << 29) /* bit 29 */
 
+/********* Power managment (WOL) **********/
+#define PCICFG_PM_CONTROL_OFFSET                0x44
+#define PCICFG_PM_CONTROL_MASK                  0x108   /* bits 3 & 8 */
+
 /********* ISR0 Register offset **********/
 #define CEV_ISR0_OFFSET                         0xC18
 #define CEV_ISR_SIZE                            4
diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index f24ac4b5ce8f..84f686f41b53 100644
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -1659,6 +1659,44 @@ ret_sts:
         return status;
 }
 
+static int be_setup_wol(struct be_adapter *adapter, bool enable)
+{
+        struct be_dma_mem cmd;
+        int status = 0;
+        u8 mac[ETH_ALEN];
+
+        memset(mac, 0, ETH_ALEN);
+
+        cmd.size = sizeof(struct be_cmd_req_acpi_wol_magic_config);
+        cmd.va = pci_alloc_consistent(adapter->pdev, cmd.size, &cmd.dma);
+        if (cmd.va == NULL)
+                return -1;
+        memset(cmd.va, 0, cmd.size);
+
+        if (enable) {
+                status = pci_write_config_dword(adapter->pdev,
+                        PCICFG_PM_CONTROL_OFFSET, PCICFG_PM_CONTROL_MASK);
+                if (status) {
+                        dev_err(&adapter->pdev->dev,
+                                "Could not enable Wake-on-lan \n");
+                        pci_free_consistent(adapter->pdev, cmd.size, cmd.va,
+                                        cmd.dma);
+                        return status;
+                }
+                status = be_cmd_enable_magic_wol(adapter,
+                                adapter->netdev->dev_addr, &cmd);
+                pci_enable_wake(adapter->pdev, PCI_D3hot, 1);
+                pci_enable_wake(adapter->pdev, PCI_D3cold, 1);
+        } else {
+                status = be_cmd_enable_magic_wol(adapter, mac, &cmd);
+                pci_enable_wake(adapter->pdev, PCI_D3hot, 0);
+                pci_enable_wake(adapter->pdev, PCI_D3cold, 0);
+        }
+
+        pci_free_consistent(adapter->pdev, cmd.size, cmd.va, cmd.dma);
+        return status;
+}
+
 static int be_setup(struct be_adapter *adapter)
 {
         struct net_device *netdev = adapter->netdev;
@@ -2282,6 +2320,9 @@ static int be_suspend(struct pci_dev *pdev, pm_message_t state)
         struct be_adapter *adapter = pci_get_drvdata(pdev);
         struct net_device *netdev =  adapter->netdev;
 
+        if (adapter->wol)
+                be_setup_wol(adapter, true);
+
         netif_device_detach(netdev);
         if (netif_running(netdev)) {
                 rtnl_lock();
@@ -2324,6 +2365,9 @@ static int be_resume(struct pci_dev *pdev)
                 rtnl_unlock();
         }
         netif_device_attach(netdev);
+
+        if (adapter->wol)
+                be_setup_wol(adapter, false);
         return 0;
 }