From: Linus Walleij <linus.walleij@linaro.org> To: Herbert Xu <herbert@gondor.apana.org.au>, "David S. Miller" <davem@davemloft.net>, Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Maxime Coquelin <mcoquelin.stm32@gmail.com>, Alexandre Torgue <alexandre.torgue@foss.st.com>, Lionel Debieve <lionel.debieve@foss.st.com> Cc: linux-crypto@vger.kernel.org, devicetree@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Linus Walleij <linus.walleij@linaro.org> Subject: [PATCH v2 4/6] crypto: stm32/hash: Wait for idle before final CPU xmit Date: Tue, 10 Jan 2023 20:19:15 +0100 [thread overview] Message-ID: <20221227-ux500-stm32-hash-v2-4-bc443bc44ca4@linaro.org> (raw) In-Reply-To: <20221227-ux500-stm32-hash-v2-0-bc443bc44ca4@linaro.org> When calculating the hash using the CPU, right before the final hash calculation, heavy testing on Ux500 reveals that it is wise to wait for the hardware to go idle before calculating the final hash. The default test vectors mostly worked fine, but when I used the extensive tests and stress the hardware I ran into this problem. Acked-by: Lionel Debieve <lionel.debieve@foss.st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> --- ChangeLog v1->v2: - Pick up Lionel's ACK --- drivers/crypto/stm32/stm32-hash.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c index cc0a4e413a82..d4eefd8292ff 100644 --- a/drivers/crypto/stm32/stm32-hash.c +++ b/drivers/crypto/stm32/stm32-hash.c @@ -362,6 +362,9 @@ static int stm32_hash_xmit_cpu(struct stm32_hash_dev *hdev, stm32_hash_write(hdev, HASH_DIN, buffer[count]); if (final) { + if (stm32_hash_wait_busy(hdev)) + return -ETIMEDOUT; + stm32_hash_set_nblw(hdev, length); reg = stm32_hash_read(hdev, HASH_STR); reg |= HASH_STR_DCAL; -- 2.39.0
WARNING: multiple messages have this Message-ID (diff)
From: Linus Walleij <linus.walleij@linaro.org> To: Herbert Xu <herbert@gondor.apana.org.au>, "David S. Miller" <davem@davemloft.net>, Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Maxime Coquelin <mcoquelin.stm32@gmail.com>, Alexandre Torgue <alexandre.torgue@foss.st.com>, Lionel Debieve <lionel.debieve@foss.st.com> Cc: linux-crypto@vger.kernel.org, devicetree@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Linus Walleij <linus.walleij@linaro.org> Subject: [PATCH v2 4/6] crypto: stm32/hash: Wait for idle before final CPU xmit Date: Tue, 10 Jan 2023 20:19:15 +0100 [thread overview] Message-ID: <20221227-ux500-stm32-hash-v2-4-bc443bc44ca4@linaro.org> (raw) In-Reply-To: <20221227-ux500-stm32-hash-v2-0-bc443bc44ca4@linaro.org> When calculating the hash using the CPU, right before the final hash calculation, heavy testing on Ux500 reveals that it is wise to wait for the hardware to go idle before calculating the final hash. The default test vectors mostly worked fine, but when I used the extensive tests and stress the hardware I ran into this problem. Acked-by: Lionel Debieve <lionel.debieve@foss.st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> --- ChangeLog v1->v2: - Pick up Lionel's ACK --- drivers/crypto/stm32/stm32-hash.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c index cc0a4e413a82..d4eefd8292ff 100644 --- a/drivers/crypto/stm32/stm32-hash.c +++ b/drivers/crypto/stm32/stm32-hash.c @@ -362,6 +362,9 @@ static int stm32_hash_xmit_cpu(struct stm32_hash_dev *hdev, stm32_hash_write(hdev, HASH_DIN, buffer[count]); if (final) { + if (stm32_hash_wait_busy(hdev)) + return -ETIMEDOUT; + stm32_hash_set_nblw(hdev, length); reg = stm32_hash_read(hdev, HASH_STR); reg |= HASH_STR_DCAL; -- 2.39.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-01-10 19:19 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-01-10 19:19 [PATCH v2 0/6] crypto: stm32 hash - reuse for Ux500 Linus Walleij 2023-01-10 19:19 ` Linus Walleij 2023-01-10 19:19 ` [PATCH v2 1/6] dt-bindings: crypto: Let STM32 define Ux500 HASH Linus Walleij 2023-01-10 19:19 ` Linus Walleij 2023-01-13 1:30 ` Rob Herring 2023-01-13 1:30 ` Rob Herring 2023-01-10 19:19 ` [PATCH v2 2/6] crypto: stm32/hash: Simplify code Linus Walleij 2023-01-10 19:19 ` Linus Walleij 2023-01-10 19:19 ` [PATCH v2 3/6] crypto: stm32/hash: Use existing busy poll function Linus Walleij 2023-01-10 19:19 ` Linus Walleij 2023-01-10 19:19 ` Linus Walleij [this message] 2023-01-10 19:19 ` [PATCH v2 4/6] crypto: stm32/hash: Wait for idle before final CPU xmit Linus Walleij 2023-01-10 19:19 ` [PATCH v2 5/6] crypto: stm32/hash: Support Ux500 hash Linus Walleij 2023-01-10 19:19 ` Linus Walleij 2023-01-20 10:21 ` Herbert Xu 2023-01-20 10:21 ` Herbert Xu 2023-01-10 19:19 ` [PATCH v2 6/6] crypto: ux500/hash - delete driver Linus Walleij 2023-01-10 19:19 ` Linus Walleij
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