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charset="utf-8" Message-Id: <20261103-sdxi-base-v4-7-3668ccc7aab8@amd.com> References: <20261103-sdxi-base-v4-0-3668ccc7aab8@amd.com> In-Reply-To: <20261103-sdxi-base-v4-0-3668ccc7aab8@amd.com> To: Vinod Koul , Frank Li Cc: Bjorn Helgaas , David Rientjes , John.Kariuki@amd.com, Jonathan Cameron , Kinsey Ho , Mario Limonciello , PradeepVineshReddy.Kodamati@amd.com, Shivank Garg , Stephen Bates , Tycho Andersen , Wei Huang , Wei Xu , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Nathan Lynch X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1793760600; l=2762; i=nathan.lynch@amd.com; s=20260722; h=from:subject:message-id; bh=lcVjPd4Rwww8qk6gAO1P0F0TrxoLRp+syl4wYn0CFBk=; b=9k9rKM76Kj4Lg1H9W3A4pOLYAcUii7doRLKjnMN3/b1LKwk6+KVjBJ/GkvWFfnP2LH/xeXOCa m2o78T0Ku1iAK6/d8JFLhymteBgS3n98S8tCHnoFPeOEsYgnk++KRHC X-Developer-Key: i=nathan.lynch@amd.com; a=ed25519; pk=pO5+BCw/TENGLvwX5NYZOZmZihcxjkxeFSMuk47erps= X-Endpoint-Received: by B4 Relay for nathan.lynch@amd.com/20260722 with auth_id=891 X-Original-From: Nathan Lynch Reply-To: nathan.lynch@amd.com Content-Transfer-Encoding: 7bit From: Nathan Lynch Each SDXI context has a control block (CXT_CTL) that identifies its descriptor ring, context status block, and write index. Define the CXT_CTL layout and create a DMA pool for them during function initialization. Co-developed-by: Wei Huang Signed-off-by: Wei Huang Signed-off-by: Nathan Lynch --- drivers/dma/sdxi/device.c | 21 ++++++++++++++++++++- drivers/dma/sdxi/hw.h | 11 +++++++++++ drivers/dma/sdxi/sdxi.h | 2 ++ 3 files changed, 33 insertions(+), 1 deletion(-) diff --git a/drivers/dma/sdxi/device.c b/drivers/dma/sdxi/device.c index baf55f6b6826..acc955b088ba 100644 --- a/drivers/dma/sdxi/device.c +++ b/drivers/dma/sdxi/device.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -351,6 +352,24 @@ static int sdxi_fn_activate(struct sdxi_dev *sdxi) return 0; } +static int sdxi_device_init(struct sdxi_dev *sdxi) +{ + struct device *dev = sdxi->dev; + size_t size, align; + int err; + + size = align = sizeof(struct sdxi_cxt_ctl); + sdxi->cxt_ctl_pool = dmam_pool_create("CXT_CTL", dev, size, align, 0); + if (!sdxi->cxt_ctl_pool) + return -ENOMEM; + + err = sdxi_fn_activate(sdxi); + if (err) + return err; + + return 0; +} + int sdxi_register(struct device *dev, const struct sdxi_bus_ops *ops) { struct sdxi_dev *sdxi; @@ -372,7 +391,7 @@ int sdxi_register(struct device *dev, const struct sdxi_bus_ops *ops) if (err) return err; - return sdxi_fn_activate(sdxi); + return sdxi_device_init(sdxi); } EXPORT_SYMBOL_NS_GPL(sdxi_register, "SDXI"); diff --git a/drivers/dma/sdxi/hw.h b/drivers/dma/sdxi/hw.h index 0551c2b52980..82c6b4a20cde 100644 --- a/drivers/dma/sdxi/hw.h +++ b/drivers/dma/sdxi/hw.h @@ -47,4 +47,15 @@ struct sdxi_cxt_L1_table { }; static_assert(sizeof(struct sdxi_cxt_L1_table) == 4096); +/* SDXI 1.0 Table 3-4: Context Control (CXT_CTL) */ +struct sdxi_cxt_ctl { + __le64 ds_ring_ptr; + __le32 ds_ring_sz; + __u8 rsvd_0[4]; + __le64 cxt_sts_ptr; + __le64 write_index_ptr; + __u8 rsvd_1[32]; +} __packed __aligned(64); +static_assert(sizeof(struct sdxi_cxt_ctl) == 64); + #endif /* DMA_SDXI_HW_H */ diff --git a/drivers/dma/sdxi/sdxi.h b/drivers/dma/sdxi/sdxi.h index 856a3838eec3..356a47ed39da 100644 --- a/drivers/dma/sdxi/sdxi.h +++ b/drivers/dma/sdxi/sdxi.h @@ -49,6 +49,8 @@ struct sdxi_dev { struct sdxi_cxt_L1_table *L1_table; dma_addr_t L1_dma; + struct dma_pool *cxt_ctl_pool; + bool has_mailbox; const struct sdxi_bus_ops *bus_ops; -- 2.56.0