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sfc: Allow DRV_GEN events to be used outside of selftests 

Formerly, efx_test_eventq_irq() assumed it was the only user of
driver generated events. Allow it to interoperate with other users.

We can create more than 16 channels, so align event codes with
a multiple of 256 not 16.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steve Hodgson 2010-06-01 11:19:09 +00:00 committed by David S. Miller
parent 901d3fe848
commit d730dc527a
4 changed files with 18 additions and 22 deletions
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4
drivers/net/sfc/net_driver.h
View File

@ -336,7 +336,7 @@ enum efx_rx_alloc_method {
* @eventq: Event queue buffer
* @eventq_read_ptr: Event queue read pointer
* @last_eventq_read_ptr: Last event queue read pointer value.
* @eventq_magic: Event queue magic value for driver-generated test events
* @magic_count: Event queue test event count
* @irq_count: Number of IRQs since last adaptive moderation decision
* @irq_mod_score: IRQ moderation score
* @rx_alloc_level: Watermark based heuristic counter for pushing descriptors
@ -367,7 +367,7 @@ struct efx_channel {
struct efx_special_buffer eventq;
unsigned int eventq_read_ptr;
unsigned int last_eventq_read_ptr;
unsigned int eventq_magic;
unsigned int magic_count;
unsigned int irq_count;
unsigned int irq_mod_score;

17
drivers/net/sfc/nic.c
View File

@ -79,6 +79,10 @@ MODULE_PARM_DESC(rx_xon_thresh_bytes, "RX fifo XON threshold");
/* Depth of RX flush request fifo */
#define EFX_RX_FLUSH_COUNT 4
/* Magic value for efx_generate_test_event() */
#define EFX_CHANNEL_MAGIC(_channel) \
(0x00010100 + (_channel)->channel)
/**************************************************************************
*
* Solarstorm hardware access
@ -993,8 +997,10 @@ int efx_nic_process_eventq(struct efx_channel *channel, int budget)
}
break;
case FSE_AZ_EV_CODE_DRV_GEN_EV:
channel->eventq_magic = EFX_QWORD_FIELD(
event, FSF_AZ_DRV_GEN_EV_MAGIC);
if (EFX_QWORD_FIELD(event, FSF_AZ_DRV_GEN_EV_MAGIC)
== EFX_CHANNEL_MAGIC(channel))
++channel->magic_count;
EFX_LOG(channel->efx, "channel %d received generated "
"event "EFX_QWORD_FMT"\n", channel->channel,
EFX_QWORD_VAL(event));
@ -1088,12 +1094,9 @@ void efx_nic_remove_eventq(struct efx_channel *channel)
}
/* Generates a test event on the event queue. A subsequent call to
* process_eventq() should pick up the event and place the value of
* "magic" into channel->eventq_magic;
*/
void efx_nic_generate_test_event(struct efx_channel *channel, unsigned int magic)
void efx_nic_generate_test_event(struct efx_channel *channel)
{
unsigned int magic = EFX_CHANNEL_MAGIC(channel);
efx_qword_t test_event;
EFX_POPULATE_QWORD_2(test_event, FSF_AZ_EV_CODE,

3
drivers/net/sfc/nic.h
View File

@ -190,8 +190,7 @@ extern int efx_nic_rx_xoff_thresh, efx_nic_rx_xon_thresh;
/* Interrupts and test events */
extern int efx_nic_init_interrupt(struct efx_nic *efx);
extern void efx_nic_enable_interrupts(struct efx_nic *efx);
extern void efx_nic_generate_test_event(struct efx_channel *channel,
unsigned int magic);
extern void efx_nic_generate_test_event(struct efx_channel *channel);
extern void efx_nic_generate_interrupt(struct efx_nic *efx);
extern void efx_nic_disable_interrupts(struct efx_nic *efx);
extern void efx_nic_fini_interrupt(struct efx_nic *efx);

16
drivers/net/sfc/selftest.c
View File

@ -161,23 +161,17 @@ static int efx_test_interrupts(struct efx_nic *efx,
static int efx_test_eventq_irq(struct efx_channel *channel,
struct efx_self_tests *tests)
{
unsigned int magic, count;
/* Channel specific code, limited to 20 bits */
magic = (0x00010150 + channel->channel);
EFX_LOG(channel->efx, "channel %d testing event queue with code %x\n",
channel->channel, magic);
unsigned int magic_count, count;
tests->eventq_dma[channel->channel] = -1;
tests->eventq_int[channel->channel] = -1;
tests->eventq_poll[channel->channel] = -1;
/* Reset flag and zero magic word */
magic_count = channel->magic_count;
channel->efx->last_irq_cpu = -1;
channel->eventq_magic = 0;
smp_wmb();
efx_nic_generate_test_event(channel, magic);
efx_nic_generate_test_event(channel);
/* Wait for arrival of interrupt */
count = 0;
@ -187,7 +181,7 @@ static int efx_test_eventq_irq(struct efx_channel *channel,
if (channel->work_pending)
efx_process_channel_now(channel);
if (channel->eventq_magic == magic)
if (channel->magic_count != magic_count)
goto eventq_ok;
} while (++count < 2);
@ -204,7 +198,7 @@ static int efx_test_eventq_irq(struct efx_channel *channel,
/* Check to see if event was received even if interrupt wasn't */
efx_process_channel_now(channel);
if (channel->eventq_magic == magic) {
if (channel->magic_count != magic_count) {
EFX_ERR(channel->efx, "channel %d event was generated, but "
"failed to trigger an interrupt\n", channel->channel);
tests->eventq_dma[channel->channel] = 1;