#include <linux/version.h>
#include <linux/types.h>
#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/string.h>
#include <linux/pci.h>
#define QEDE_RQSTAT_STRING(stat_name) (#stat_name)
#define QEDE_RQSTAT(stat_name) \
{QEDE_RQSTAT_OFFSET(stat_name), QEDE_RQSTAT_STRING(stat_name)}
+
+#define QEDE_SELFTEST_POLL_COUNT 100
+
static const struct {
u64 offset;
char string[ETH_GSTRING_LEN];
};
enum qede_ethtool_tests {
+ QEDE_ETHTOOL_INT_LOOPBACK,
QEDE_ETHTOOL_INTERRUPT_TEST,
QEDE_ETHTOOL_MEMORY_TEST,
QEDE_ETHTOOL_REGISTER_TEST,
};
static const char qede_tests_str_arr[QEDE_ETHTOOL_TEST_MAX][ETH_GSTRING_LEN] = {
+ "Internal loopback (offline)",
"Interrupt (online)\t",
"Memory (online)\t\t",
"Register (online)\t",
return 0;
}
+/* This function enables the interrupt generation and the NAPI on the device */
+static void qede_netif_start(struct qede_dev *edev)
+{
+ int i;
+
+ if (!netif_running(edev->ndev))
+ return;
+
+ for_each_rss(i) {
+ /* Update and reenable interrupts */
+ qed_sb_ack(edev->fp_array[i].sb_info, IGU_INT_ENABLE, 1);
+ napi_enable(&edev->fp_array[i].napi);
+ }
+}
+
+/* This function disables the NAPI and the interrupt generation on the device */
+static void qede_netif_stop(struct qede_dev *edev)
+{
+ int i;
+
+ for_each_rss(i) {
+ napi_disable(&edev->fp_array[i].napi);
+ /* Disable interrupts */
+ qed_sb_ack(edev->fp_array[i].sb_info, IGU_INT_DISABLE, 0);
+ }
+}
+
+static int qede_selftest_transmit_traffic(struct qede_dev *edev,
+ struct sk_buff *skb)
+{
+ struct qede_tx_queue *txq = &edev->fp_array[0].txqs[0];
+ struct eth_tx_1st_bd *first_bd;
+ dma_addr_t mapping;
+ int i, idx, val;
+
+ /* Fill the entry in the SW ring and the BDs in the FW ring */
+ idx = txq->sw_tx_prod & NUM_TX_BDS_MAX;
+ txq->sw_tx_ring[idx].skb = skb;
+ first_bd = qed_chain_produce(&txq->tx_pbl);
+ memset(first_bd, 0, sizeof(*first_bd));
+ val = 1 << ETH_TX_1ST_BD_FLAGS_START_BD_SHIFT;
+ first_bd->data.bd_flags.bitfields = val;
+
+ /* Map skb linear data for DMA and set in the first BD */
+ mapping = dma_map_single(&edev->pdev->dev, skb->data,
+ skb_headlen(skb), DMA_TO_DEVICE);
+ if (unlikely(dma_mapping_error(&edev->pdev->dev, mapping))) {
+ DP_NOTICE(edev, "SKB mapping failed\n");
+ return -ENOMEM;
+ }
+ BD_SET_UNMAP_ADDR_LEN(first_bd, mapping, skb_headlen(skb));
+
+ /* update the first BD with the actual num BDs */
+ first_bd->data.nbds = 1;
+ txq->sw_tx_prod++;
+ /* 'next page' entries are counted in the producer value */
+ val = cpu_to_le16(qed_chain_get_prod_idx(&txq->tx_pbl));
+ txq->tx_db.data.bd_prod = val;
+
+ /* wmb makes sure that the BDs data is updated before updating the
+ * producer, otherwise FW may read old data from the BDs.
+ */
+ wmb();
+ barrier();
+ writel(txq->tx_db.raw, txq->doorbell_addr);
+
+ /* mmiowb is needed to synchronize doorbell writes from more than one
+ * processor. It guarantees that the write arrives to the device before
+ * the queue lock is released and another start_xmit is called (possibly
+ * on another CPU). Without this barrier, the next doorbell can bypass
+ * this doorbell. This is applicable to IA64/Altix systems.
+ */
+ mmiowb();
+
+ for (i = 0; i < QEDE_SELFTEST_POLL_COUNT; i++) {
+ if (qede_txq_has_work(txq))
+ break;
+ usleep_range(100, 200);
+ }
+
+ if (!qede_txq_has_work(txq)) {
+ DP_NOTICE(edev, "Tx completion didn't happen\n");
+ return -1;
+ }
+
+ first_bd = (struct eth_tx_1st_bd *)qed_chain_consume(&txq->tx_pbl);
+ dma_unmap_page(&edev->pdev->dev, BD_UNMAP_ADDR(first_bd),
+ BD_UNMAP_LEN(first_bd), DMA_TO_DEVICE);
+ txq->sw_tx_cons++;
+ txq->sw_tx_ring[idx].skb = NULL;
+
+ return 0;
+}
+
+static int qede_selftest_receive_traffic(struct qede_dev *edev)
+{
+ struct qede_rx_queue *rxq = edev->fp_array[0].rxq;
+ u16 hw_comp_cons, sw_comp_cons, sw_rx_index, len;
+ struct eth_fast_path_rx_reg_cqe *fp_cqe;
+ struct sw_rx_data *sw_rx_data;
+ union eth_rx_cqe *cqe;
+ u8 *data_ptr;
+ int i;
+
+ /* The packet is expected to receive on rx-queue 0 even though RSS is
+ * enabled. This is because the queue 0 is configured as the default
+ * queue and that the loopback traffic is not IP.
+ */
+ for (i = 0; i < QEDE_SELFTEST_POLL_COUNT; i++) {
+ if (qede_has_rx_work(rxq))
+ break;
+ usleep_range(100, 200);
+ }
+
+ if (!qede_has_rx_work(rxq)) {
+ DP_NOTICE(edev, "Failed to receive the traffic\n");
+ return -1;
+ }
+
+ hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr);
+ sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring);
+
+ /* Memory barrier to prevent the CPU from doing speculative reads of CQE
+ * / BD before reading hw_comp_cons. If the CQE is read before it is
+ * written by FW, then FW writes CQE and SB, and then the CPU reads the
+ * hw_comp_cons, it will use an old CQE.
+ */
+ rmb();
+
+ /* Get the CQE from the completion ring */
+ cqe = (union eth_rx_cqe *)qed_chain_consume(&rxq->rx_comp_ring);
+
+ /* Get the data from the SW ring */
+ sw_rx_index = rxq->sw_rx_cons & NUM_RX_BDS_MAX;
+ sw_rx_data = &rxq->sw_rx_ring[sw_rx_index];
+ fp_cqe = &cqe->fast_path_regular;
+ len = le16_to_cpu(fp_cqe->len_on_first_bd);
+ data_ptr = (u8 *)(page_address(sw_rx_data->data) +
+ fp_cqe->placement_offset + sw_rx_data->page_offset);
+ for (i = ETH_HLEN; i < len; i++)
+ if (data_ptr[i] != (unsigned char)(i & 0xff)) {
+ DP_NOTICE(edev, "Loopback test failed\n");
+ qede_recycle_rx_bd_ring(rxq, edev, 1);
+ return -1;
+ }
+
+ qede_recycle_rx_bd_ring(rxq, edev, 1);
+
+ return 0;
+}
+
+static int qede_selftest_run_loopback(struct qede_dev *edev, u32 loopback_mode)
+{
+ struct qed_link_params link_params;
+ struct sk_buff *skb = NULL;
+ int rc = 0, i;
+ u32 pkt_size;
+ u8 *packet;
+
+ if (!netif_running(edev->ndev)) {
+ DP_NOTICE(edev, "Interface is down\n");
+ return -EINVAL;
+ }
+
+ qede_netif_stop(edev);
+
+ /* Bring up the link in Loopback mode */
+ memset(&link_params, 0, sizeof(link_params));
+ link_params.link_up = true;
+ link_params.override_flags = QED_LINK_OVERRIDE_LOOPBACK_MODE;
+ link_params.loopback_mode = loopback_mode;
+ edev->ops->common->set_link(edev->cdev, &link_params);
+
+ /* Wait for loopback configuration to apply */
+ msleep_interruptible(500);
+
+ /* prepare the loopback packet */
+ pkt_size = edev->ndev->mtu + ETH_HLEN;
+
+ skb = netdev_alloc_skb(edev->ndev, pkt_size);
+ if (!skb) {
+ DP_INFO(edev, "Can't allocate skb\n");
+ rc = -ENOMEM;
+ goto test_loopback_exit;
+ }
+ packet = skb_put(skb, pkt_size);
+ ether_addr_copy(packet, edev->ndev->dev_addr);
+ ether_addr_copy(packet + ETH_ALEN, edev->ndev->dev_addr);
+ memset(packet + (2 * ETH_ALEN), 0x77, (ETH_HLEN - (2 * ETH_ALEN)));
+ for (i = ETH_HLEN; i < pkt_size; i++)
+ packet[i] = (unsigned char)(i & 0xff);
+
+ rc = qede_selftest_transmit_traffic(edev, skb);
+ if (rc)
+ goto test_loopback_exit;
+
+ rc = qede_selftest_receive_traffic(edev);
+ if (rc)
+ goto test_loopback_exit;
+
+ DP_VERBOSE(edev, NETIF_MSG_RX_STATUS, "Loopback test successful\n");
+
+test_loopback_exit:
+ dev_kfree_skb(skb);
+
+ /* Bring up the link in Normal mode */
+ memset(&link_params, 0, sizeof(link_params));
+ link_params.link_up = true;
+ link_params.override_flags = QED_LINK_OVERRIDE_LOOPBACK_MODE;
+ link_params.loopback_mode = QED_LINK_LOOPBACK_NONE;
+ edev->ops->common->set_link(edev->cdev, &link_params);
+
+ /* Wait for loopback configuration to apply */
+ msleep_interruptible(500);
+
+ qede_netif_start(edev);
+
+ return rc;
+}
+
static void qede_self_test(struct net_device *dev,
struct ethtool_test *etest, u64 *buf)
{
memset(buf, 0, sizeof(u64) * QEDE_ETHTOOL_TEST_MAX);
+ if (etest->flags & ETH_TEST_FL_OFFLINE) {
+ if (qede_selftest_run_loopback(edev,
+ QED_LINK_LOOPBACK_INT_PHY)) {
+ buf[QEDE_ETHTOOL_INT_LOOPBACK] = 1;
+ etest->flags |= ETH_TEST_FL_FAILED;
+ }
+ }
+
if (edev->ops->common->selftest->selftest_interrupt(edev->cdev)) {
buf[QEDE_ETHTOOL_INTERRUPT_TEST] = 1;
etest->flags |= ETH_TEST_FL_FAILED;
projects / cascardo / linux.git / commitdiff