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Date: Tue, 27 Oct 2009 18:55:02 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, gospo@...hat.com,
Alexander Duyck <alexander.h.duyck@...el.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next-2.6 PATCH 18/20] igb: make ethtool use core xmit map and
free functionality
From: Alexander Duyck <alexander.h.duyck@...el.com>
This change adds a clean_rx/tx_irq type function call to the ethtool loopback
testing which allows us to test the core transmit and receive functionality in
the driver.
Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/igb/igb_ethtool.c | 156 +++++++++++++++++++++++------------------
1 files changed, 89 insertions(+), 67 deletions(-)
diff --git a/drivers/net/igb/igb_ethtool.c b/drivers/net/igb/igb_ethtool.c
index 80afd8a..aa05f00 100644
--- a/drivers/net/igb/igb_ethtool.c
+++ b/drivers/net/igb/igb_ethtool.c
@@ -1254,7 +1254,7 @@ static int igb_setup_desc_rings(struct igb_adapter *adapter)
struct igb_ring *tx_ring = &adapter->test_tx_ring;
struct igb_ring *rx_ring = &adapter->test_rx_ring;
struct e1000_hw *hw = &adapter->hw;
- int i, ret_val;
+ int ret_val;
/* Setup Tx descriptor ring and Tx buffers */
tx_ring->count = IGB_DEFAULT_TXD;
@@ -1270,34 +1270,6 @@ static int igb_setup_desc_rings(struct igb_adapter *adapter)
igb_setup_tctl(adapter);
igb_configure_tx_ring(adapter, tx_ring);
- for (i = 0; i < tx_ring->count; i++) {
- union e1000_adv_tx_desc *tx_desc;
- unsigned int size = 1024;
- struct sk_buff *skb = alloc_skb(size, GFP_KERNEL);
-
- if (!skb) {
- ret_val = 2;
- goto err_nomem;
- }
- skb_put(skb, size);
- tx_ring->buffer_info[i].skb = skb;
- tx_ring->buffer_info[i].length = skb->len;
- tx_ring->buffer_info[i].dma =
- pci_map_single(tx_ring->pdev, skb->data, skb->len,
- PCI_DMA_TODEVICE);
- tx_desc = E1000_TX_DESC_ADV(*tx_ring, i);
- tx_desc->read.buffer_addr =
- cpu_to_le64(tx_ring->buffer_info[i].dma);
- tx_desc->read.olinfo_status = cpu_to_le32(skb->len) <<
- E1000_ADVTXD_PAYLEN_SHIFT;
- tx_desc->read.cmd_type_len = cpu_to_le32(skb->len);
- tx_desc->read.cmd_type_len |= cpu_to_le32(E1000_TXD_CMD_EOP |
- E1000_TXD_CMD_IFCS |
- E1000_TXD_CMD_RS |
- E1000_ADVTXD_DTYP_DATA |
- E1000_ADVTXD_DCMD_DEXT);
- }
-
/* Setup Rx descriptor ring and Rx buffers */
rx_ring->count = IGB_DEFAULT_RXD;
rx_ring->pdev = adapter->pdev;
@@ -1470,14 +1442,78 @@ static int igb_check_lbtest_frame(struct sk_buff *skb, unsigned int frame_size)
return 13;
}
+static int igb_clean_test_rings(struct igb_ring *rx_ring,
+ struct igb_ring *tx_ring,
+ unsigned int size)
+{
+ union e1000_adv_rx_desc *rx_desc;
+ struct igb_buffer *buffer_info;
+ int rx_ntc, tx_ntc, count = 0;
+ u32 staterr;
+
+ /* initialize next to clean and descriptor values */
+ rx_ntc = rx_ring->next_to_clean;
+ tx_ntc = tx_ring->next_to_clean;
+ rx_desc = E1000_RX_DESC_ADV(*rx_ring, rx_ntc);
+ staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
+
+ while (staterr & E1000_RXD_STAT_DD) {
+ /* check rx buffer */
+ buffer_info = &rx_ring->buffer_info[rx_ntc];
+
+ /* unmap rx buffer, will be remapped by alloc_rx_buffers */
+ pci_unmap_single(rx_ring->pdev,
+ buffer_info->dma,
+ rx_ring->rx_buffer_len,
+ PCI_DMA_FROMDEVICE);
+ buffer_info->dma = 0;
+
+ /* verify contents of skb */
+ if (!igb_check_lbtest_frame(buffer_info->skb, size))
+ count++;
+
+ /* unmap buffer on tx side */
+ buffer_info = &tx_ring->buffer_info[tx_ntc];
+ igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
+
+ /* increment rx/tx next to clean counters */
+ rx_ntc++;
+ if (rx_ntc == rx_ring->count)
+ rx_ntc = 0;
+ tx_ntc++;
+ if (tx_ntc == tx_ring->count)
+ tx_ntc = 0;
+
+ /* fetch next descriptor */
+ rx_desc = E1000_RX_DESC_ADV(*rx_ring, rx_ntc);
+ staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
+ }
+
+ /* re-map buffers to ring, store next to clean values */
+ igb_alloc_rx_buffers_adv(rx_ring, count);
+ rx_ring->next_to_clean = rx_ntc;
+ tx_ring->next_to_clean = tx_ntc;
+
+ return count;
+}
+
static int igb_run_loopback_test(struct igb_adapter *adapter)
{
struct igb_ring *tx_ring = &adapter->test_tx_ring;
struct igb_ring *rx_ring = &adapter->test_rx_ring;
- int i, j, k, l, lc, good_cnt, ret_val = 0;
- unsigned long time;
+ int i, j, lc, good_cnt, ret_val = 0;
+ unsigned int size = 1024;
+ netdev_tx_t tx_ret_val;
+ struct sk_buff *skb;
+
+ /* allocate test skb */
+ skb = alloc_skb(size, GFP_KERNEL);
+ if (!skb)
+ return 11;
- writel(rx_ring->count - 1, rx_ring->tail);
+ /* place data into test skb */
+ igb_create_lbtest_frame(skb, size);
+ skb_put(skb, size);
/* Calculate the loop count based on the largest descriptor ring
* The idea is to wrap the largest ring a number of times using 64
@@ -1489,50 +1525,36 @@ static int igb_run_loopback_test(struct igb_adapter *adapter)
else
lc = ((rx_ring->count / 64) * 2) + 1;
- k = l = 0;
for (j = 0; j <= lc; j++) { /* loop count loop */
- for (i = 0; i < 64; i++) { /* send the packets */
- igb_create_lbtest_frame(tx_ring->buffer_info[k].skb,
- 1024);
- pci_dma_sync_single_for_device(tx_ring->pdev,
- tx_ring->buffer_info[k].dma,
- tx_ring->buffer_info[k].length,
- PCI_DMA_TODEVICE);
- k++;
- if (k == tx_ring->count)
- k = 0;
- }
- writel(k, tx_ring->tail);
- msleep(200);
- time = jiffies; /* set the start time for the receive */
+ /* reset count of good packets */
good_cnt = 0;
- do { /* receive the sent packets */
- pci_dma_sync_single_for_cpu(rx_ring->pdev,
- rx_ring->buffer_info[l].dma,
- IGB_RXBUFFER_2048,
- PCI_DMA_FROMDEVICE);
-
- ret_val = igb_check_lbtest_frame(
- rx_ring->buffer_info[l].skb, 1024);
- if (!ret_val)
+
+ /* place 64 packets on the transmit queue*/
+ for (i = 0; i < 64; i++) {
+ skb_get(skb);
+ tx_ret_val = igb_xmit_frame_ring_adv(skb, tx_ring);
+ if (tx_ret_val == NETDEV_TX_OK)
good_cnt++;
- l++;
- if (l == rx_ring->count)
- l = 0;
- /* time + 20 msecs (200 msecs on 2.4) is more than
- * enough time to complete the receives, if it's
- * exceeded, break and error off
- */
- } while (good_cnt < 64 && jiffies < (time + 20));
+ }
+
if (good_cnt != 64) {
- ret_val = 13; /* ret_val is the same as mis-compare */
+ ret_val = 12;
break;
}
- if (jiffies >= (time + 20)) {
- ret_val = 14; /* error code for time out error */
+
+ /* allow 200 milliseconds for packets to go from tx to rx */
+ msleep(200);
+
+ good_cnt = igb_clean_test_rings(rx_ring, tx_ring, size);
+ if (good_cnt != 64) {
+ ret_val = 13;
break;
}
} /* end loop count loop */
+
+ /* free the original skb */
+ kfree_skb(skb);
+
return ret_val;
}
--
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