be2net: Add support for ethtool self test

This patch adds support for ethtool selftest.

From: Suresh R <sureshr@serverengines.com>
Signed-off-by: Ajit Khaparde <ajitk@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 223 insertions, 0 deletions

diff --git a/drivers/net/benet/be_cmds.c b/drivers/net/benet/be_cmds.c
index bee7b822d120..1b68bd98dc0c 100644
--- a/drivers/net/benet/be_cmds.c
+++ b/drivers/net/benet/be_cmds.c
@@ -1478,3 +1478,96 @@ err:
         spin_unlock_bh(&adapter->mcc_lock);
         return status;
 }
+
+int be_cmd_loopback_test(struct be_adapter *adapter, u32 port_num,
+                u32 loopback_type, u32 pkt_size, u32 num_pkts, u64 pattern)
+{
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_loopback_test *req;
+        int status;
+
+        spin_lock_bh(&adapter->mcc_lock);
+
+        wrb = wrb_from_mccq(adapter);
+        if (!wrb) {
+                status = -EBUSY;
+                goto err;
+        }
+
+        req = embedded_payload(wrb);
+
+        be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0,
+                                OPCODE_LOWLEVEL_LOOPBACK_TEST);
+
+        be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_LOWLEVEL,
+                        OPCODE_LOWLEVEL_LOOPBACK_TEST, sizeof(*req));
+
+        req->pattern = cpu_to_le64(pattern);
+        req->src_port = cpu_to_le32(port_num);
+        req->dest_port = cpu_to_le32(port_num);
+        req->pkt_size = cpu_to_le32(pkt_size);
+        req->num_pkts = cpu_to_le32(num_pkts);
+        req->loopback_type = cpu_to_le32(loopback_type);
+
+        status = be_mcc_notify_wait(adapter);
+        if (!status) {
+                struct be_cmd_resp_loopback_test *resp = embedded_payload(wrb);
+                status = le32_to_cpu(resp->status);
+        }
+
+err:
+        spin_unlock_bh(&adapter->mcc_lock);
+        return status;
+}
+
+int be_cmd_ddr_dma_test(struct be_adapter *adapter, u64 pattern,
+                                u32 byte_cnt, struct be_dma_mem *cmd)
+{
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_ddrdma_test *req;
+        struct be_sge *sge;
+        int status;
+        int i, j = 0;
+
+        spin_lock_bh(&adapter->mcc_lock);
+
+        wrb = wrb_from_mccq(adapter);
+        if (!wrb) {
+                status = -EBUSY;
+                goto err;
+        }
+        req = cmd->va;
+        sge = nonembedded_sgl(wrb);
+        be_wrb_hdr_prepare(wrb, cmd->size, false, 1,
+                                OPCODE_LOWLEVEL_HOST_DDR_DMA);
+        be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_LOWLEVEL,
+                        OPCODE_LOWLEVEL_HOST_DDR_DMA, cmd->size);
+
+        sge->pa_hi = cpu_to_le32(upper_32_bits(cmd->dma));
+        sge->pa_lo = cpu_to_le32(cmd->dma & 0xFFFFFFFF);
+        sge->len = cpu_to_le32(cmd->size);
+
+        req->pattern = cpu_to_le64(pattern);
+        req->byte_count = cpu_to_le32(byte_cnt);
+        for (i = 0; i < byte_cnt; i++) {
+                req->snd_buff[i] = (u8)(pattern >> (j*8));
+                j++;
+                if (j > 7)
+                        j = 0;
+        }
+
+        status = be_mcc_notify_wait(adapter);
+
+        if (!status) {
+                struct be_cmd_resp_ddrdma_test *resp;
+                resp = cmd->va;
+                if ((memcmp(resp->rcv_buff, req->snd_buff, byte_cnt) != 0) ||
+                                resp->snd_err) {
+                        status = -1;
+                }
+        }
+
+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 e8512a144f5e..e7323be507d0 100644
--- a/drivers/net/benet/be_cmds.h
+++ b/drivers/net/benet/be_cmds.h
@@ -112,6 +112,7 @@ struct be_mcc_mailbox {
 
 #define CMD_SUBSYSTEM_COMMON    0x1
 #define CMD_SUBSYSTEM_ETH       0x3
+#define CMD_SUBSYSTEM_LOWLEVEL  0xb
 
 #define OPCODE_COMMON_NTWK_MAC_QUERY                    1
 #define OPCODE_COMMON_NTWK_MAC_SET                      2
@@ -152,6 +153,9 @@ struct be_mcc_mailbox {
 #define OPCODE_ETH_RX_DESTROY                           10
 #define OPCODE_ETH_ACPI_WOL_MAGIC_CONFIG                12
 
+#define OPCODE_LOWLEVEL_HOST_DDR_DMA                    17
+#define OPCODE_LOWLEVEL_LOOPBACK_TEST                   18
+
 struct be_cmd_req_hdr {
         u8 opcode;              /* dword 0 */
         u8 subsystem;           /* dword 0 */
@@ -797,6 +801,45 @@ struct be_cmd_req_acpi_wol_magic_config{
         u8 rsvd2[2];
 } __packed;
 
+/********************** LoopBack test *********************/
+struct be_cmd_req_loopback_test {
+        struct be_cmd_req_hdr hdr;
+        u32 loopback_type;
+        u32 num_pkts;
+        u64 pattern;
+        u32 src_port;
+        u32 dest_port;
+        u32 pkt_size;
+};
+
+struct be_cmd_resp_loopback_test {
+        struct be_cmd_resp_hdr resp_hdr;
+        u32    status;
+        u32    num_txfer;
+        u32    num_rx;
+        u32    miscomp_off;
+        u32    ticks_compl;
+};
+
+/********************** DDR DMA test *********************/
+struct be_cmd_req_ddrdma_test {
+        struct be_cmd_req_hdr hdr;
+        u64 pattern;
+        u32 byte_count;
+        u32 rsvd0;
+        u8  snd_buff[4096];
+        u8  rsvd1[4096];
+};
+
+struct be_cmd_resp_ddrdma_test {
+        struct be_cmd_resp_hdr hdr;
+        u64 pattern;
+        u32 byte_cnt;
+        u32 snd_err;
+        u8  rsvd0[4096];
+        u8  rcv_buff[4096];
+};
+
 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,
@@ -864,3 +907,8 @@ 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);
+extern int be_cmd_loopback_test(struct be_adapter *adapter, u32 port_num,
+                                u32 loopback_type, u32 pkt_size,
+                                u32 num_pkts, u64 pattern);
+extern int be_cmd_ddr_dma_test(struct be_adapter *adapter, u64 pattern,
+                        u32 byte_cnt, struct be_dma_mem *cmd);
diff --git a/drivers/net/benet/be_ethtool.c b/drivers/net/benet/be_ethtool.c
index 83a2fc703995..298b92cbd689 100644
--- a/drivers/net/benet/be_ethtool.c
+++ b/drivers/net/benet/be_ethtool.c
@@ -107,6 +107,18 @@ static const struct be_ethtool_stat et_stats[] = {
 };
 #define ETHTOOL_STATS_NUM ARRAY_SIZE(et_stats)
 
+static const char et_self_tests[][ETH_GSTRING_LEN] = {
+        "MAC Loopback test",
+        "PHY Loopback test",
+        "External Loopback test",
+        "DDR DMA test"
+};
+
+#define ETHTOOL_TESTS_NUM ARRAY_SIZE(et_self_tests)
+#define BE_MAC_LOOPBACK 0x0
+#define BE_PHY_LOOPBACK 0x1
+#define BE_ONE_PORT_EXT_LOOPBACK 0x2
+
 static void
 be_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo)
 {
@@ -278,12 +290,20 @@ be_get_stat_strings(struct net_device *netdev, uint32_t stringset,
                         data += ETH_GSTRING_LEN;
                 }
                 break;
+        case ETH_SS_TEST:
+                for (i = 0; i < ETHTOOL_TESTS_NUM; i++) {
+                        memcpy(data, et_self_tests[i], ETH_GSTRING_LEN);
+                        data += ETH_GSTRING_LEN;
+                }
+                break;
         }
 }
 
 static int be_get_sset_count(struct net_device *netdev, int stringset)
 {
         switch (stringset) {
+        case ETH_SS_TEST:
+                return ETHTOOL_TESTS_NUM;
         case ETH_SS_STATS:
                 return ETHTOOL_STATS_NUM;
         default:
@@ -442,6 +462,67 @@ be_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
 }
 
 static int
+be_test_ddr_dma(struct be_adapter *adapter)
+{
+        int ret, i;
+        struct be_dma_mem ddrdma_cmd;
+        u64 pattern[2] = {0x5a5a5a5a5a5a5a5a, 0xa5a5a5a5a5a5a5a5};
+
+        ddrdma_cmd.size = sizeof(struct be_cmd_req_ddrdma_test);
+        ddrdma_cmd.va = pci_alloc_consistent(adapter->pdev, ddrdma_cmd.size,
+                                        &ddrdma_cmd.dma);
+        if (!ddrdma_cmd.va) {
+                dev_err(&adapter->pdev->dev, "Memory allocation failure \n");
+                return -ENOMEM;
+        }
+
+        for (i = 0; i < 2; i++) {
+                ret = be_cmd_ddr_dma_test(adapter, pattern[i],
+                                        4096, &ddrdma_cmd);
+                if (ret != 0)
+                        goto err;
+        }
+
+err:
+        pci_free_consistent(adapter->pdev, ddrdma_cmd.size,
+                        ddrdma_cmd.va, ddrdma_cmd.dma);
+        return ret;
+}
+
+static void
+be_self_test(struct net_device *netdev, struct ethtool_test *test, u64 *data)
+{
+        struct be_adapter *adapter = netdev_priv(netdev);
+
+        memset(data, 0, sizeof(u64) * ETHTOOL_TESTS_NUM);
+
+        if (test->flags & ETH_TEST_FL_OFFLINE) {
+                data[0] = be_cmd_loopback_test(adapter, adapter->port_num,
+                                                BE_MAC_LOOPBACK, 1500,
+                                                2, 0xabc);
+                if (data[0] != 0)
+                        test->flags |= ETH_TEST_FL_FAILED;
+
+                data[1] = be_cmd_loopback_test(adapter, adapter->port_num,
+                                                BE_PHY_LOOPBACK, 1500,
+                                                2, 0xabc);
+                if (data[1] != 0)
+                        test->flags |= ETH_TEST_FL_FAILED;
+
+                data[2] = be_cmd_loopback_test(adapter, adapter->port_num,
+                                                BE_ONE_PORT_EXT_LOOPBACK,
+                                                1500, 2, 0xabc);
+                if (data[2] != 0)
+                        test->flags |= ETH_TEST_FL_FAILED;
+
+                data[3] = be_test_ddr_dma(adapter);
+                if (data[3] != 0)
+                        test->flags |= ETH_TEST_FL_FAILED;
+        }
+
+}
+
+static int
 be_do_flash(struct net_device *netdev, struct ethtool_flash *efl)
 {
         struct be_adapter *adapter = netdev_priv(netdev);
@@ -479,4 +560,5 @@ const struct ethtool_ops be_ethtool_ops = {
         .get_sset_count = be_get_sset_count,
         .get_ethtool_stats = be_get_ethtool_stats,
         .flash_device = be_do_flash,
+        .self_test = be_self_test,
 };