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[61.92.221.177]) by smtp.googlemail.com with ESMTPSA id 41be03b00d2f7-b47640afb33sm5094320a12.38.2025.08.21.08.57.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Aug 2025 08:57:46 -0700 (PDT) From: Nick Chan Date: Thu, 21 Aug 2025 23:56:42 +0800 Subject: [PATCH v3 5/9] soc: apple: sart: Add SARTv0 support Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250821-t8015-nvme-v3-5-14a4178adf68@gmail.com> References: <20250821-t8015-nvme-v3-0-14a4178adf68@gmail.com> In-Reply-To: <20250821-t8015-nvme-v3-0-14a4178adf68@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/ZANAwAKAQHKCLemxQgkAcsmYgBop0HUSDKOE7o9/KxkLrLGisPDzdwRuzUZKZVkV 7t/hhYav/uJAjMEAAEKAB0WIQRLUnh4XJes95w8aIMBygi3psUIJAUCaKdB1AAKCRABygi3psUI JEf3D/9MTNaRSanW5d+XC6IKcZa3GXuBd2THZSYlnSMl/pfWwiWIbQF5SB4vv859yM0RFDxVNMW enLM8hzLdaD5r2oRWcL96Nod5A4EqiuZvW7aGis8F/E+kjVUPsn0xQnS8lKuZNWMBVNoIzSrUor E36L2vEbycW204QtjTRjwf14pH7jPEkmqIOnT0yO7nvbEVTdydbNO3uUX5g5J0Yro1eWXpUAEs9 m5W1CEKXBGH/T/KB0xVf09DSqJSBXaiEe+sd4ApT8v/HZsUSZ3+pazTwk3Yqk/OLoVS+NfVM6bb NNxHirWbh0or9sSKaZ8OPRYD6MiFPT3WdjW5c8ujlR0xZ6yJvP9gKV7ERuEGuNo3gw75yI4pihD zYHh/7Wz6gnBZR129m7mJYboTPn17sO777Khk9lxyD+0V9xzfoUnr2Xf4Jr9qObs7peOHkrsBPP Pzqfj6X2P92L9oQIEVLeNNHpX2YcMNtQ9V1g1T2De5yCIX2Z/eLYXFOef1MDbycGXWyE7XA0qaL ED2IcpHnSfBe1Cy7gsLVY2znvNhiELVxQ4bvEB8tKDNjhDpDtYla2IpttmBlFMuO5VGC75iyJ+e C3heKdxfJwbYnLLkrwskHcN2AWgVDklnhvps4Hzqm8M4NlL6XHB39DsxPtEVp6Fdiv7QrtH6EnO XKmwQT0EXEP0rjw== 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..4ff1942b82a74cabeda99540ba6= 3c6e92386986d 100644 --- a/drivers/soc/apple/sart.c +++ b/drivers/soc/apple/sart.c @@ -25,6 +25,18 @@ =20 #define APPLE_SART_MAX_ENTRIES 16 =20 +/* 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; }; =20 +static void sart0_get_entry(struct apple_sart *sart, int index, u8 *flags, + phys_addr_t *paddr, size_t *size) +{ + u32 cfg =3D readl(sart->regs + APPLE_SART0_CONFIG(index)); + phys_addr_t paddr_ =3D readl(sart->regs + APPLE_SART0_PADDR(index)); + size_t size_ =3D FIELD_GET(APPLE_SART0_CONFIG_SIZE, cfg); + + *flags =3D FIELD_GET(APPLE_SART0_CONFIG_FLAGS, cfg); + *size =3D size_ << APPLE_SART0_CONFIG_SIZE_SHIFT; + *paddr =3D 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 =3D FIELD_PREP(APPLE_SART0_CONFIG_FLAGS, flags); + cfg |=3D 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 =3D { + .get_entry =3D sart0_get_entry, + .set_entry =3D sart0_set_entry, + .flags_allow =3D APPLE_SART0_FLAGS_ALLOW, + .size_shift =3D APPLE_SART0_CONFIG_SIZE_SHIFT, + .paddr_shift =3D APPLE_SART0_PADDR_SHIFT, + .size_max =3D 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[]= =3D { .compatible =3D "apple,t8103-sart", .data =3D &sart_ops_v2, }, + { + .compatible =3D "apple,t8015-sart", + .data =3D &sart_ops_v0, + }, {} }; MODULE_DEVICE_TABLE(of, apple_sart_of_match); --=20 2.50.1