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net: ipa: use a bitmap for endpoint replenish_enabled

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Define a new replenish_flags bitmap to contain Boolean flags
associated with an endpoint's replenishing state.  Replace the
replenish_enabled field with a flag in that bitmap.  This is to
prepare for the next patch, which adds another flag.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alex Elder 2022-01-12 07:30:11 -06:00 committed by David S. Miller
parent 6c0e3b5ce9
commit c1aaa01dbf
2 changed files with 17 additions and 6 deletions
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8
drivers/net/ipa/ipa_endpoint.c
View File

@ -1082,7 +1082,7 @@ static void ipa_endpoint_replenish(struct ipa_endpoint *endpoint, bool add_one)
u32 backlog;
int delta;
if (!endpoint->replenish_enabled) {
if (!test_bit(IPA_REPLENISH_ENABLED, endpoint->replenish_flags)) {
if (add_one)
atomic_inc(&endpoint->replenish_saved);
return;
@ -1119,7 +1119,7 @@ static void ipa_endpoint_replenish_enable(struct ipa_endpoint *endpoint)
u32 max_backlog;
u32 saved;
endpoint->replenish_enabled = true;
set_bit(IPA_REPLENISH_ENABLED, endpoint->replenish_flags);
while ((saved = atomic_xchg(&endpoint->replenish_saved, 0)))
atomic_add(saved, &endpoint->replenish_backlog);
@ -1133,7 +1133,7 @@ static void ipa_endpoint_replenish_disable(struct ipa_endpoint *endpoint)
{
u32 backlog;
endpoint->replenish_enabled = false;
clear_bit(IPA_REPLENISH_ENABLED, endpoint->replenish_flags);
while ((backlog = atomic_xchg(&endpoint->replenish_backlog, 0)))
atomic_add(backlog, &endpoint->replenish_saved);
}
@ -1690,7 +1690,7 @@ static void ipa_endpoint_setup_one(struct ipa_endpoint *endpoint)
/* RX transactions require a single TRE, so the maximum
* backlog is the same as the maximum outstanding TREs.
*/
endpoint->replenish_enabled = false;
clear_bit(IPA_REPLENISH_ENABLED, endpoint->replenish_flags);
atomic_set(&endpoint->replenish_saved,
gsi_channel_tre_max(gsi, endpoint->channel_id));
atomic_set(&endpoint->replenish_backlog, 0);

15
drivers/net/ipa/ipa_endpoint.h
View File

@ -40,6 +40,17 @@ enum ipa_endpoint_name {
#define IPA_ENDPOINT_MAX 32 /* Max supported by driver */
/**
* enum ipa_replenish_flag: RX buffer replenish flags
*
* @IPA_REPLENISH_ENABLED: Whether receive buffer replenishing is enabled
* @IPA_REPLENISH_COUNT: Number of defined replenish flags
*/
enum ipa_replenish_flag {
IPA_REPLENISH_ENABLED,
IPA_REPLENISH_COUNT, /* Number of flags (must be last) */
};
/**
* struct ipa_endpoint - IPA endpoint information
* @ipa: IPA pointer
@ -51,7 +62,7 @@ enum ipa_endpoint_name {
* @trans_tre_max: Maximum number of TRE descriptors per transaction
* @evt_ring_id: GSI event ring used by the endpoint
* @netdev: Network device pointer, if endpoint uses one
* @replenish_enabled: Whether receive buffer replenishing is enabled
* @replenish_flags: Replenishing state flags
* @replenish_ready: Number of replenish transactions without doorbell
* @replenish_saved: Replenish requests held while disabled
* @replenish_backlog: Number of buffers needed to fill hardware queue
@ -72,7 +83,7 @@ struct ipa_endpoint {
struct net_device *netdev;
/* Receive buffer replenishing for RX endpoints */
bool replenish_enabled;
DECLARE_BITMAP(replenish_flags, IPA_REPLENISH_COUNT);
u32 replenish_ready;
atomic_t replenish_saved;
atomic_t replenish_backlog;