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sfc: Generalise driver event generation

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Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
This commit is contained in:
Ben Hutchings 2012-02-07 23:39:18 +00:00
parent 055e0ad014
commit 4ef594eb89
1 changed files with 27 additions and 24 deletions
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51
drivers/net/ethernet/sfc/nic.c
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@ -57,13 +57,17 @@
/* Depth of RX flush request fifo */
#define EFX_RX_FLUSH_COUNT 4
/* Generated event code for efx_generate_test_event() */
#define EFX_CHANNEL_MAGIC_TEST(_channel) \
(0x00010100 + (_channel)->channel)
/* Driver generated events */
#define _EFX_CHANNEL_MAGIC_TEST 0x000101
#define _EFX_CHANNEL_MAGIC_FILL 0x000102
/* Generated event code for efx_generate_fill_event() */
#define EFX_CHANNEL_MAGIC_FILL(_channel) \
(0x00010200 + (_channel)->channel)
#define _EFX_CHANNEL_MAGIC(_code, _data) ((_code) << 8 | (_data))
#define _EFX_CHANNEL_MAGIC_CODE(_magic) ((_magic) >> 8)
#define EFX_CHANNEL_MAGIC_TEST(_channel) \
_EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_TEST, (_channel)->channel)
#define EFX_CHANNEL_MAGIC_FILL(_channel) \
_EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_FILL, (_channel)->channel)
/**************************************************************************
*
@ -693,6 +697,16 @@ static void efx_generate_event(struct efx_channel *channel, efx_qword_t *event)
efx_writeo(channel->efx, &drv_ev_reg, FR_AZ_DRV_EV);
}
static void efx_magic_event(struct efx_channel *channel, u32 magic)
{
efx_qword_t event;
EFX_POPULATE_QWORD_2(event, FSF_AZ_EV_CODE,
FSE_AZ_EV_CODE_DRV_GEN_EV,
FSF_AZ_DRV_GEN_EV_MAGIC, magic);
efx_generate_event(channel, &event);
}
/* Handle a transmit completion event
*
* The NIC batches TX completion events; the message we receive is of
@ -898,12 +912,13 @@ static void
efx_handle_generated_event(struct efx_channel *channel, efx_qword_t *event)
{
struct efx_nic *efx = channel->efx;
unsigned code;
unsigned magic;
code = EFX_QWORD_FIELD(*event, FSF_AZ_DRV_GEN_EV_MAGIC);
if (code == EFX_CHANNEL_MAGIC_TEST(channel))
magic = EFX_QWORD_FIELD(*event, FSF_AZ_DRV_GEN_EV_MAGIC);
if (magic == EFX_CHANNEL_MAGIC_TEST(channel))
; /* ignore */
else if (code == EFX_CHANNEL_MAGIC_FILL(channel))
else if (magic == EFX_CHANNEL_MAGIC_FILL(channel))
/* The queue must be empty, so we won't receive any rx
* events, so efx_process_channel() won't refill the
* queue. Refill it here */
@ -1132,24 +1147,12 @@ void efx_nic_remove_eventq(struct efx_channel *channel)
void efx_nic_generate_test_event(struct efx_channel *channel)
{
unsigned int magic = EFX_CHANNEL_MAGIC_TEST(channel);
efx_qword_t test_event;
EFX_POPULATE_QWORD_2(test_event, FSF_AZ_EV_CODE,
FSE_AZ_EV_CODE_DRV_GEN_EV,
FSF_AZ_DRV_GEN_EV_MAGIC, magic);
efx_generate_event(channel, &test_event);
efx_magic_event(channel, EFX_CHANNEL_MAGIC_TEST(channel));
}
void efx_nic_generate_fill_event(struct efx_channel *channel)
{
unsigned int magic = EFX_CHANNEL_MAGIC_FILL(channel);
efx_qword_t test_event;
EFX_POPULATE_QWORD_2(test_event, FSF_AZ_EV_CODE,
FSE_AZ_EV_CODE_DRV_GEN_EV,
FSF_AZ_DRV_GEN_EV_MAGIC, magic);
efx_generate_event(channel, &test_event);
efx_magic_event(channel, EFX_CHANNEL_MAGIC_FILL(channel));
}
/**************************************************************************