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sfc: Allocate each channel separately, along with its RX and TX queues

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This will allow for reallocation of channel structures and rings.

Change module parameter separate_tx_channels to be read-only, since we
now require its value to be constant.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings
2010-09-10 06:41:57 +00:00
committed by David S. Miller
parent f7d12cdcbb
commit 8313aca38b
3 changed files with 61 additions and 76 deletions
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62
drivers/net/sfc/net_driver.h
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@@ -225,8 +225,6 @@ struct efx_rx_page_state {
/**
* struct efx_rx_queue - An Efx RX queue
* @efx: The associated Efx NIC
* @queue: DMA queue number
* @channel: The associated channel
* @buffer: The software buffer ring
* @rxd: The hardware descriptor ring
* @added_count: Number of buffers added to the receive queue.
@@ -250,8 +248,6 @@ struct efx_rx_page_state {
*/
struct efx_rx_queue {
struct efx_nic *efx;
int queue;
struct efx_channel *channel;
struct efx_rx_buffer *buffer;
struct efx_special_buffer rxd;
@@ -327,9 +323,10 @@ enum efx_rx_alloc_method {
* @n_rx_frm_trunc: Count of RX_FRM_TRUNC errors
* @n_rx_overlength: Count of RX_OVERLENGTH errors
* @n_skbuff_leaks: Count of skbuffs leaked due to RX overrun
* @tx_queue: Pointer to first TX queue, or %NULL if not used for TX
* @rx_queue: RX queue for this channel
* @tx_stop_count: Core TX queue stop count
* @tx_stop_lock: Core TX queue stop lock
* @tx_queue: TX queues for this channel
*/
struct efx_channel {
struct efx_nic *efx;
@@ -366,9 +363,12 @@ struct efx_channel {
struct efx_rx_buffer *rx_pkt;
bool rx_pkt_csummed;
struct efx_tx_queue *tx_queue;
struct efx_rx_queue rx_queue;
atomic_t tx_stop_count;
spinlock_t tx_stop_lock;
struct efx_tx_queue tx_queue[2];
};
enum efx_led_mode {
@@ -724,9 +724,7 @@ struct efx_nic {
enum nic_state state;
enum reset_type reset_pending;
struct efx_tx_queue tx_queue[EFX_MAX_TX_QUEUES];
struct efx_rx_queue rx_queue[EFX_MAX_RX_QUEUES];
struct efx_channel channel[EFX_MAX_CHANNELS];
struct efx_channel *channel[EFX_MAX_CHANNELS];
unsigned next_buffer_table;
unsigned n_channels;
@@ -913,34 +911,30 @@ static inline struct efx_channel *
efx_get_channel(struct efx_nic *efx, unsigned index)
{
EFX_BUG_ON_PARANOID(index >= efx->n_channels);
return &efx->channel[index];
return efx->channel[index];
}
/* Iterate over all used channels */
#define efx_for_each_channel(_channel, _efx) \
for (_channel = &((_efx)->channel[0]); \
_channel < &((_efx)->channel[(efx)->n_channels]); \
_channel++)
for (_channel = (_efx)->channel[0]; \
_channel; \
_channel = (_channel->channel + 1 < (_efx)->n_channels) ? \
(_efx)->channel[_channel->channel + 1] : NULL)
static inline struct efx_tx_queue *
efx_get_tx_queue(struct efx_nic *efx, unsigned index, unsigned type)
{
EFX_BUG_ON_PARANOID(index >= efx->n_tx_channels ||
type >= EFX_TXQ_TYPES);
return &efx->tx_queue[index * EFX_TXQ_TYPES + type];
}
extern struct efx_tx_queue *
efx_get_tx_queue(struct efx_nic *efx, unsigned index, unsigned type);
static inline struct efx_tx_queue *
efx_channel_get_tx_queue(struct efx_channel *channel, unsigned type)
{
struct efx_tx_queue *tx_queue = channel->tx_queue;
EFX_BUG_ON_PARANOID(type >= EFX_TXQ_TYPES);
return tx_queue ? tx_queue + type : NULL;
return tx_queue->channel ? tx_queue + type : NULL;
}
/* Iterate over all TX queues belonging to a channel */
#define efx_for_each_channel_tx_queue(_tx_queue, _channel) \
for (_tx_queue = (_channel)->tx_queue; \
for (_tx_queue = efx_channel_get_tx_queue(channel, 0); \
_tx_queue && _tx_queue < (_channel)->tx_queue + EFX_TXQ_TYPES; \
_tx_queue++)
@@ -948,41 +942,31 @@ static inline struct efx_rx_queue *
efx_get_rx_queue(struct efx_nic *efx, unsigned index)
{
EFX_BUG_ON_PARANOID(index >= efx->n_rx_channels);
return &efx->rx_queue[index];
return &efx->channel[index]->rx_queue;
}
/* Iterate over all used RX queues */
#define efx_for_each_rx_queue(_rx_queue, _efx) \
for (_rx_queue = &((_efx)->rx_queue[0]); \
_rx_queue < &((_efx)->rx_queue[(_efx)->n_rx_channels]); \
_rx_queue++)
static inline struct efx_rx_queue *
efx_channel_get_rx_queue(struct efx_channel *channel)
{
struct efx_rx_queue *rx_queue =
&channel->efx->rx_queue[channel->channel];
return rx_queue->channel == channel ? rx_queue : NULL;
return channel->channel < channel->efx->n_rx_channels ?
&channel->rx_queue : NULL;
}
/* Iterate over all RX queues belonging to a channel */
#define efx_for_each_channel_rx_queue(_rx_queue, _channel) \
for (_rx_queue = &((_channel)->efx->rx_queue[(_channel)->channel]); \
for (_rx_queue = efx_channel_get_rx_queue(channel); \
_rx_queue; \
_rx_queue = NULL) \
if (_rx_queue->channel != (_channel)) \
continue; \
else
_rx_queue = NULL)
static inline struct efx_channel *
efx_rx_queue_channel(struct efx_rx_queue *rx_queue)
{
return rx_queue->channel;
return container_of(rx_queue, struct efx_channel, rx_queue);
}
static inline int efx_rx_queue_index(struct efx_rx_queue *rx_queue)
{
return rx_queue->queue;
return efx_rx_queue_channel(rx_queue)->channel;
}
/* Returns a pointer to the specified receive buffer in the RX