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[73.185.129.58]) by smtp.gmail.com with ESMTPSA id e17sm7476742iow.30.2022.01.12.05.30.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Jan 2022 05:30:18 -0800 (PST) From: Alex Elder To: davem@davemloft.net, kuba@kernel.org Cc: jponduru@codeaurora.org, avuyyuru@codeaurora.org, bjorn.andersson@linaro.org, agross@kernel.org, cpratapa@codeaurora.org, subashab@codeaurora.org, mka@chromium.org, evgreen@chromium.org, elder@kernel.org, netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net v2 2/3] net: ipa: use a bitmap for endpoint replenish_enabled Date: Wed, 12 Jan 2022 07:30:11 -0600 Message-Id: <20220112133012.778148-3-elder@linaro.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220112133012.778148-1-elder@linaro.org> References: <20220112133012.778148-1-elder@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org 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 --- v2: This change was not present in version 1 drivers/net/ipa/ipa_endpoint.c | 8 ++++---- drivers/net/ipa/ipa_endpoint.h | 15 +++++++++++++-- 2 files changed, 17 insertions(+), 6 deletions(-) diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c index 8b055885cf3cf..cddddcedaf72b 100644 --- a/drivers/net/ipa/ipa_endpoint.c +++ b/drivers/net/ipa/ipa_endpoint.c @@ -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); diff --git a/drivers/net/ipa/ipa_endpoint.h b/drivers/net/ipa/ipa_endpoint.h index 0a859d10312dc..07d5c20e5f000 100644 --- a/drivers/net/ipa/ipa_endpoint.h +++ b/drivers/net/ipa/ipa_endpoint.h @@ -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;