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authorAlex Elder <elder@linaro.org>2022-02-03 18:09:21 +0100
committerDavid S. Miller <davem@davemloft.net>2022-02-04 11:16:08 +0100
commitb9dbabc5ca84087862cc3ea21bb718d2ef99fa2f (patch)
tree1325a7ec3af509687ce02d6a68271f7db30c2e47 /drivers/net/ipa
parentnet: ipa: increment backlog in replenish caller (diff)
downloadlinux-b9dbabc5ca84087862cc3ea21bb718d2ef99fa2f.tar.xz
linux-b9dbabc5ca84087862cc3ea21bb718d2ef99fa2f.zip
net: ipa: decide on doorbell in replenish loop
Decide whether the doorbell should be signaled when committing a replenish transaction in the main replenish loop, rather than in ipa_endpoint_replenish_one(). This is a step to facilitate the next patch. Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ipa')
-rw-r--r--drivers/net/ipa/ipa_endpoint.c21
1 files changed, 12 insertions, 9 deletions
diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c
index 060a025d70ec..274cf1c30b59 100644
--- a/drivers/net/ipa/ipa_endpoint.c
+++ b/drivers/net/ipa/ipa_endpoint.c
@@ -1036,10 +1036,10 @@ static void ipa_endpoint_status(struct ipa_endpoint *endpoint)
iowrite32(val, ipa->reg_virt + offset);
}
-static int ipa_endpoint_replenish_one(struct ipa_endpoint *endpoint)
+static int
+ipa_endpoint_replenish_one(struct ipa_endpoint *endpoint, bool doorbell)
{
struct gsi_trans *trans;
- bool doorbell = false;
struct page *page;
u32 buffer_size;
u32 offset;
@@ -1064,11 +1064,6 @@ static int ipa_endpoint_replenish_one(struct ipa_endpoint *endpoint)
goto err_free_pages;
trans->data = page; /* transaction owns page now */
- if (++endpoint->replenish_ready == IPA_REPLENISH_BATCH) {
- doorbell = true;
- endpoint->replenish_ready = 0;
- }
-
gsi_trans_commit(trans, doorbell);
return 0;
@@ -1104,9 +1099,17 @@ static void ipa_endpoint_replenish(struct ipa_endpoint *endpoint)
if (test_and_set_bit(IPA_REPLENISH_ACTIVE, endpoint->replenish_flags))
return;
- while (atomic_dec_not_zero(&endpoint->replenish_backlog))
- if (ipa_endpoint_replenish_one(endpoint))
+ while (atomic_dec_not_zero(&endpoint->replenish_backlog)) {
+ bool doorbell;
+
+ if (++endpoint->replenish_ready == IPA_REPLENISH_BATCH)
+ endpoint->replenish_ready = 0;
+
+ /* Ring the doorbell if we've got a full batch */
+ doorbell = !endpoint->replenish_ready;
+ if (ipa_endpoint_replenish_one(endpoint, doorbell))
goto try_again_later;
+ }
clear_bit(IPA_REPLENISH_ACTIVE, endpoint->replenish_flags);