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igb: Fix tx/rx_ring_count parameters for igb on suspend/resume/ring r…
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…esize

When suspending the device the ring structure is freed which causes it to
loose track of the count.  To resolve this we need to move the ring count
outside of the ring structure and store it in the adapter struct.

In addition to resolving the suspend/resume issue this patch also addresses
issues seen in the event of memory allocation errors causing uneven ring
sizes on multiple queues.

Signed-off-by: Alexander Duyck <[email protected]>
Signed-off-by: Jeff Kirsher <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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@davem330
Alexander Duyck authored and davem330 committed Nov 20, 2008
1 parent b2d5653 commit 68fd991
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Showing 3 changed files with 59 additions and 57 deletions.
4 changes: 4 additions & 0 deletions drivers/net/igb/igb.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -294,6 +294,8 @@ struct igb_adapter {
unsigned int lro_flushed;
unsigned int lro_no_desc;
#endif
unsigned int tx_ring_count;
unsigned int rx_ring_count;
};

#define IGB_FLAG_HAS_MSI (1 << 0)
Expand Down Expand Up @@ -325,6 +327,8 @@ extern void igb_reset(struct igb_adapter *);
extern int igb_set_spd_dplx(struct igb_adapter *, u16);
extern int igb_setup_tx_resources(struct igb_adapter *, struct igb_ring *);
extern int igb_setup_rx_resources(struct igb_adapter *, struct igb_ring *);
extern void igb_free_tx_resources(struct igb_ring *);
extern void igb_free_rx_resources(struct igb_ring *);
extern void igb_update_stats(struct igb_adapter *);
extern void igb_set_ethtool_ops(struct net_device *);

Expand Down
102 changes: 49 additions & 53 deletions drivers/net/igb/igb_ethtool.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -714,15 +714,13 @@ static void igb_get_ringparam(struct net_device *netdev,
struct ethtool_ringparam *ring)
{
struct igb_adapter *adapter = netdev_priv(netdev);
struct igb_ring *tx_ring = adapter->tx_ring;
struct igb_ring *rx_ring = adapter->rx_ring;

ring->rx_max_pending = IGB_MAX_RXD;
ring->tx_max_pending = IGB_MAX_TXD;
ring->rx_mini_max_pending = 0;
ring->rx_jumbo_max_pending = 0;
ring->rx_pending = rx_ring->count;
ring->tx_pending = tx_ring->count;
ring->rx_pending = adapter->rx_ring_count;
ring->tx_pending = adapter->tx_ring_count;
ring->rx_mini_pending = 0;
ring->rx_jumbo_pending = 0;
}
Expand All @@ -731,12 +729,9 @@ static int igb_set_ringparam(struct net_device *netdev,
struct ethtool_ringparam *ring)
{
struct igb_adapter *adapter = netdev_priv(netdev);
struct igb_buffer *old_buf;
struct igb_buffer *old_rx_buf;
void *old_desc;
struct igb_ring *temp_ring;
int i, err;
u32 new_rx_count, new_tx_count, old_size;
dma_addr_t old_dma;
u32 new_rx_count, new_tx_count;

if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
return -EINVAL;
Expand All @@ -749,12 +744,19 @@ static int igb_set_ringparam(struct net_device *netdev,
new_tx_count = min(new_tx_count, (u32)IGB_MAX_TXD);
new_tx_count = ALIGN(new_tx_count, REQ_TX_DESCRIPTOR_MULTIPLE);

if ((new_tx_count == adapter->tx_ring->count) &&
(new_rx_count == adapter->rx_ring->count)) {
if ((new_tx_count == adapter->tx_ring_count) &&
(new_rx_count == adapter->rx_ring_count)) {
/* nothing to do */
return 0;
}

if (adapter->num_tx_queues > adapter->num_rx_queues)
temp_ring = vmalloc(adapter->num_tx_queues * sizeof(struct igb_ring));
else
temp_ring = vmalloc(adapter->num_rx_queues * sizeof(struct igb_ring));
if (!temp_ring)
return -ENOMEM;

while (test_and_set_bit(__IGB_RESETTING, &adapter->state))
msleep(1);

Expand All @@ -766,62 +768,55 @@ static int igb_set_ringparam(struct net_device *netdev,
* because the ISRs in MSI-X mode get passed pointers
* to the tx and rx ring structs.
*/
if (new_tx_count != adapter->tx_ring->count) {
if (new_tx_count != adapter->tx_ring_count) {
memcpy(temp_ring, adapter->tx_ring,
adapter->num_tx_queues * sizeof(struct igb_ring));

for (i = 0; i < adapter->num_tx_queues; i++) {
/* Save existing descriptor ring */
old_buf = adapter->tx_ring[i].buffer_info;
old_desc = adapter->tx_ring[i].desc;
old_size = adapter->tx_ring[i].size;
old_dma = adapter->tx_ring[i].dma;
/* Try to allocate a new one */
adapter->tx_ring[i].buffer_info = NULL;
adapter->tx_ring[i].desc = NULL;
adapter->tx_ring[i].count = new_tx_count;
err = igb_setup_tx_resources(adapter,
&adapter->tx_ring[i]);
temp_ring[i].count = new_tx_count;
err = igb_setup_tx_resources(adapter, &temp_ring[i]);
if (err) {
/* Restore the old one so at least
the adapter still works, even if
we failed the request */
adapter->tx_ring[i].buffer_info = old_buf;
adapter->tx_ring[i].desc = old_desc;
adapter->tx_ring[i].size = old_size;
adapter->tx_ring[i].dma = old_dma;
while (i) {
i--;
igb_free_tx_resources(&temp_ring[i]);
}
goto err_setup;
}
/* Free the old buffer manually */
vfree(old_buf);
pci_free_consistent(adapter->pdev, old_size,
old_desc, old_dma);
}

for (i = 0; i < adapter->num_tx_queues; i++)
igb_free_tx_resources(&adapter->tx_ring[i]);

memcpy(adapter->tx_ring, temp_ring,
adapter->num_tx_queues * sizeof(struct igb_ring));

adapter->tx_ring_count = new_tx_count;
}

if (new_rx_count != adapter->rx_ring->count) {
for (i = 0; i < adapter->num_rx_queues; i++) {
memcpy(temp_ring, adapter->rx_ring,
adapter->num_rx_queues * sizeof(struct igb_ring));

old_rx_buf = adapter->rx_ring[i].buffer_info;
old_desc = adapter->rx_ring[i].desc;
old_size = adapter->rx_ring[i].size;
old_dma = adapter->rx_ring[i].dma;

adapter->rx_ring[i].buffer_info = NULL;
adapter->rx_ring[i].desc = NULL;
adapter->rx_ring[i].dma = 0;
adapter->rx_ring[i].count = new_rx_count;
err = igb_setup_rx_resources(adapter,
&adapter->rx_ring[i]);
for (i = 0; i < adapter->num_rx_queues; i++) {
temp_ring[i].count = new_rx_count;
err = igb_setup_rx_resources(adapter, &temp_ring[i]);
if (err) {
adapter->rx_ring[i].buffer_info = old_rx_buf;
adapter->rx_ring[i].desc = old_desc;
adapter->rx_ring[i].size = old_size;
adapter->rx_ring[i].dma = old_dma;
while (i) {
i--;
igb_free_rx_resources(&temp_ring[i]);
}
goto err_setup;
}

vfree(old_rx_buf);
pci_free_consistent(adapter->pdev, old_size, old_desc,
old_dma);
}

for (i = 0; i < adapter->num_rx_queues; i++)
igb_free_rx_resources(&adapter->rx_ring[i]);

memcpy(adapter->rx_ring, temp_ring,
adapter->num_rx_queues * sizeof(struct igb_ring));

adapter->rx_ring_count = new_rx_count;
}

err = 0;
Expand All @@ -830,6 +825,7 @@ static int igb_set_ringparam(struct net_device *netdev,
igb_up(adapter);

clear_bit(__IGB_RESETTING, &adapter->state);
vfree(temp_ring);
return err;
}

Expand Down
10 changes: 6 additions & 4 deletions drivers/net/igb/igb_main.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -76,8 +76,6 @@ static int igb_setup_all_tx_resources(struct igb_adapter *);
static int igb_setup_all_rx_resources(struct igb_adapter *);
static void igb_free_all_tx_resources(struct igb_adapter *);
static void igb_free_all_rx_resources(struct igb_adapter *);
static void igb_free_tx_resources(struct igb_ring *);
static void igb_free_rx_resources(struct igb_ring *);
void igb_update_stats(struct igb_adapter *);
static int igb_probe(struct pci_dev *, const struct pci_device_id *);
static void __devexit igb_remove(struct pci_dev *pdev);
Expand Down Expand Up @@ -259,11 +257,13 @@ static int igb_alloc_queues(struct igb_adapter *adapter)

for (i = 0; i < adapter->num_tx_queues; i++) {
struct igb_ring *ring = &(adapter->tx_ring[i]);
ring->count = adapter->tx_ring_count;
ring->adapter = adapter;
ring->queue_index = i;
}
for (i = 0; i < adapter->num_rx_queues; i++) {
struct igb_ring *ring = &(adapter->rx_ring[i]);
ring->count = adapter->rx_ring_count;
ring->adapter = adapter;
ring->queue_index = i;
ring->itr_register = E1000_ITR;
Expand Down Expand Up @@ -1400,6 +1400,8 @@ static int __devinit igb_sw_init(struct igb_adapter *adapter)

pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word);

adapter->tx_ring_count = IGB_DEFAULT_TXD;
adapter->rx_ring_count = IGB_DEFAULT_RXD;
adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
adapter->rx_ps_hdr_size = 0; /* disable packet split */
adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
Expand Down Expand Up @@ -1988,7 +1990,7 @@ static void igb_configure_rx(struct igb_adapter *adapter)
*
* Free all transmit software resources
**/
static void igb_free_tx_resources(struct igb_ring *tx_ring)
void igb_free_tx_resources(struct igb_ring *tx_ring)
{
struct pci_dev *pdev = tx_ring->adapter->pdev;

Expand Down Expand Up @@ -2088,7 +2090,7 @@ static void igb_clean_all_tx_rings(struct igb_adapter *adapter)
*
* Free all receive software resources
**/
static void igb_free_rx_resources(struct igb_ring *rx_ring)
void igb_free_rx_resources(struct igb_ring *rx_ring)
{
struct pci_dev *pdev = rx_ring->adapter->pdev;

Expand Down

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