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Commit 4ef594eb authored by Ben Hutchings's avatar Ben Hutchings
Browse files

sfc: Generalise driver event generation 



Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
parent 055e0ad0

drivers/net/ethernet/sfc/nic.c

+27 −24
Original line number Diff line number Diff line
@@ -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



#define _EFX_CHANNEL_MAGIC(_code, _data)	((_code) << 8 | (_data))

#define _EFX_CHANNEL_MAGIC_CODE(_magic)		((_magic) >> 8)



/* Generated event code for efx_generate_fill_event() */

#define EFX_CHANNEL_MAGIC_TEST(_channel)				\

	_EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_TEST, (_channel)->channel)

#define EFX_CHANNEL_MAGIC_FILL(_channel)				\

	(0x00010200 + (_channel)->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;



	magic = EFX_QWORD_FIELD(*event, FSF_AZ_DRV_GEN_EV_MAGIC);



	code = EFX_QWORD_FIELD(*event, FSF_AZ_DRV_GEN_EV_MAGIC);

	if (code == EFX_CHANNEL_MAGIC_TEST(channel))

	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));

}



/**************************************************************************