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[61.92.221.177]) by smtp.googlemail.com with ESMTPSA id d9443c01a7336-2446d538f75sm74090925ad.108.2025.08.18.01.43.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Aug 2025 01:43:53 -0700 (PDT) From: Nick Chan Date: Mon, 18 Aug 2025 16:42:58 +0800 Subject: [PATCH v2 5/9] soc: apple: sart: Add SARTv0 support Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250818-t8015-nvme-v2-5-65648cd189e0@gmail.com> References: <20250818-t8015-nvme-v2-0-65648cd189e0@gmail.com> In-Reply-To: <20250818-t8015-nvme-v2-0-65648cd189e0@gmail.com> To: Sven Peter , Janne Grunau , Alyssa Rosenzweig , Neal Gompa , Jassi Brar , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Hector Martin , Joerg Roedel , Will Deacon , Robin Murphy , Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg Cc: asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, iommu@lists.linux.dev, linux-nvme@lists.infradead.org, Nick Chan X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2791; i=towinchenmi@gmail.com; h=from:subject:message-id; bh=wJH6bCh+c84MG5dltlJIecbSR1A7z9mKknCoraX6plo=; b=owEBbQKS/ZANAwAKAQHKCLemxQgkAcsmYgBoouel7tB5pMk9ZRPwFi3VYfo+wHw0Ob6V61kt0 cM9qXkKNL2JAjMEAAEKAB0WIQRLUnh4XJes95w8aIMBygi3psUIJAUCaKLnpQAKCRABygi3psUI JAzLEAC3GE6E0JJaoSCxIkhKLQwRO5CQqJZORLUx2kZckZ15RN2ygxITFBkfPiprq86LvbbkbkE I0p7uritaNmuEOWjwLU0GLKgNMgDrdHOVr46dPQmjLA+eYyZdLDBWVcgPh19bhvkI3vNYiiiLNY T1aA0yScyUMImiJYFXJ7JetUa+L33QKyMVYEo3ahLtQgDpgM+N5xBWz5Qb7xczGySFHR3oymxd7 CE++jb6XpkCJ65D3KUIx5UihSCcya0EdlU0a/wJJhXgBe3Z44PUuhxHibvVQNBk2BWZ0dCJG8Sk Lc6fUQA+mg8RiZlTyPaW0lfhWkkQm7gU4nIjhC+b8r1ZQ8/82kIxy5Q+zxw453asfjDntuEdml0 Rx0YGtaqd6XTWiDi5jiZAEi6uJba+cmA39hS7G8LhGiTpsvI3ajeqaRAIaLXZXnJipyEIz1Bg67 LhzLbIaK2SbgcfrU+I4LrZULDInsrjjSC0PLZ/sQ9ipvWIXLCzotPFR5IuzUaesLEueit8tmRjf SJhZOLzPmKai2LhRugKpEpD2OVRhzYZtHmFiZWoVmpIf/kLbXyT7sFaVgVfdMmkyOzbVgCs3gb3 KuymzpXLz20+s/gEvuuKa9OXRnMfKHrDhUVNtdeZ93M/BJOGQ9QacRoQp0kNnlrtVcnLeIffl+E gNvlqFtZeOmGY8A== X-Developer-Key: i=towinchenmi@gmail.com; a=openpgp; fpr=4B5278785C97ACF79C3C688301CA08B7A6C50824 Add support for SARTv0 as found on Apple A11 SoC. Reviewed-by: Sven Peter Signed-off-by: Nick Chan --- drivers/soc/apple/sart.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/drivers/soc/apple/sart.c b/drivers/soc/apple/sart.c index 318f6e518a54f6edb8b97e320519df8f77c7f143..4ff1942b82a74cabeda99540ba63c6e92386986d 100644 --- a/drivers/soc/apple/sart.c +++ b/drivers/soc/apple/sart.c @@ -25,6 +25,18 @@ #define APPLE_SART_MAX_ENTRIES 16 +/* SARTv0 registers */ +#define APPLE_SART0_CONFIG(idx) (0x00 + 4 * (idx)) +#define APPLE_SART0_CONFIG_FLAGS GENMASK(28, 24) +#define APPLE_SART0_CONFIG_SIZE GENMASK(18, 0) +#define APPLE_SART0_CONFIG_SIZE_SHIFT 12 +#define APPLE_SART0_CONFIG_SIZE_MAX GENMASK(18, 0) + +#define APPLE_SART0_PADDR(idx) (0x40 + 4 * (idx)) +#define APPLE_SART0_PADDR_SHIFT 12 + +#define APPLE_SART0_FLAGS_ALLOW 0xf + /* SARTv2 registers */ #define APPLE_SART2_CONFIG(idx) (0x00 + 4 * (idx)) #define APPLE_SART2_CONFIG_FLAGS GENMASK(31, 24) @@ -71,6 +83,39 @@ struct apple_sart { unsigned long used_entries; }; +static void sart0_get_entry(struct apple_sart *sart, int index, u8 *flags, + phys_addr_t *paddr, size_t *size) +{ + u32 cfg = readl(sart->regs + APPLE_SART0_CONFIG(index)); + phys_addr_t paddr_ = readl(sart->regs + APPLE_SART0_PADDR(index)); + size_t size_ = FIELD_GET(APPLE_SART0_CONFIG_SIZE, cfg); + + *flags = FIELD_GET(APPLE_SART0_CONFIG_FLAGS, cfg); + *size = size_ << APPLE_SART0_CONFIG_SIZE_SHIFT; + *paddr = paddr_ << APPLE_SART0_PADDR_SHIFT; +} + +static void sart0_set_entry(struct apple_sart *sart, int index, u8 flags, + phys_addr_t paddr_shifted, size_t size_shifted) +{ + u32 cfg; + + cfg = FIELD_PREP(APPLE_SART0_CONFIG_FLAGS, flags); + cfg |= FIELD_PREP(APPLE_SART0_CONFIG_SIZE, size_shifted); + + writel(paddr_shifted, sart->regs + APPLE_SART0_PADDR(index)); + writel(cfg, sart->regs + APPLE_SART0_CONFIG(index)); +} + +static struct apple_sart_ops sart_ops_v0 = { + .get_entry = sart0_get_entry, + .set_entry = sart0_set_entry, + .flags_allow = APPLE_SART0_FLAGS_ALLOW, + .size_shift = APPLE_SART0_CONFIG_SIZE_SHIFT, + .paddr_shift = APPLE_SART0_PADDR_SHIFT, + .size_max = APPLE_SART0_CONFIG_SIZE_MAX, +}; + static void sart2_get_entry(struct apple_sart *sart, int index, u8 *flags, phys_addr_t *paddr, size_t *size) { @@ -319,6 +364,10 @@ static const struct of_device_id apple_sart_of_match[] = { .compatible = "apple,t8103-sart", .data = &sart_ops_v2, }, + { + .compatible = "apple,t8015-sart", + .data = &sart_ops_v0, + }, {} }; MODULE_DEVICE_TABLE(of, apple_sart_of_match); -- 2.50.1