linux-kernel - [PATCH v7 2/4] fpga: dfl: Add DFHv1 Register Definitions

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Message-Id: <20221220163652.499831-3-matthew.gerlach@linux.intel.com>
Date:   Tue, 20 Dec 2022 08:36:50 -0800
From:   matthew.gerlach@...ux.intel.com
To:     hao.wu@...el.com, yilun.xu@...el.com, russell.h.weight@...el.com,
        basheer.ahmed.muddebihal@...el.com, trix@...hat.com,
        mdf@...nel.org, linux-fpga@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        tianfei.zhang@...el.com, corbet@....net,
        gregkh@...uxfoundation.org, linux-serial@...r.kernel.org,
        jirislaby@...nel.org, geert+renesas@...der.be,
        andriy.shevchenko@...ux.intel.com,
        niklas.soderlund+renesas@...natech.se, macro@...am.me.uk,
        johan@...nel.org, lukas@...ner.de, ilpo.jarvinen@...ux.intel.com,
        marpagan@...hat.com, bagasdotme@...il.com
Cc:     Basheer Ahmed Muddebihal 
        <basheer.ahmed.muddebihal@...ux.intel.com>,
        Matthew Gerlach <matthew.gerlach@...ux.intel.com>
Subject: [PATCH v7 2/4] fpga: dfl: Add DFHv1 Register Definitions

From: Basheer Ahmed Muddebihal <basheer.ahmed.muddebihal@...ux.intel.com>

This patch adds the definitions for DFHv1 header and related register
bitfields.

Signed-off-by: Basheer Ahmed Muddebihal <basheer.ahmed.muddebihal@...ux.intel.com>
Co-developed-by: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
Signed-off-by: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
---
v7: no change

v6: remove parameter definitions from include/linux/dfl.h

v5: consistently use fields for parameter data
    s/EOL/EOP/ to match doc
    remove unneeded mask
    added Co-developed-by

v4: s/MSIX/MSI_X/g
    move kerneldoc to implementation
    don't change copyright date

v3:
    keep DFHv1 definitions "hidden" in drivers/fpga/dfl.h

v2: clean up white space and one line comments
    remove extra space in commit
    use uniform number of digits in constants
    don't change copyright date because of removed content
---
 drivers/fpga/dfl.h | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h
index 06cfcd5e84bb..fc59f33367ee 100644
--- a/drivers/fpga/dfl.h
+++ b/drivers/fpga/dfl.h
@@ -74,11 +74,43 @@
 #define DFH_REVISION		GENMASK_ULL(15, 12)	/* Feature revision */
 #define DFH_NEXT_HDR_OFST	GENMASK_ULL(39, 16)	/* Offset to next DFH */
 #define DFH_EOL			BIT_ULL(40)		/* End of list */
+#define DFH_VERSION		GENMASK_ULL(59, 52)	/* DFH version */
 #define DFH_TYPE		GENMASK_ULL(63, 60)	/* Feature type */
 #define DFH_TYPE_AFU		1
 #define DFH_TYPE_PRIVATE	3
 #define DFH_TYPE_FIU		4
 
+/*
+ * DFHv1 Register Offset definitons
+ * In DHFv1, DFH + GUID + CSR_START + CSR_SIZE_GROUP + PARAM_HDR + PARAM_DATA
+ * as common header registers
+ */
+#define DFHv1_CSR_ADDR		0x18  /* CSR Register start address */
+#define DFHv1_CSR_SIZE_GRP	0x20  /* Size of Reg Block and Group/tag */
+#define DFHv1_PARAM_HDR		0x28  /* Optional First Param header */
+
+/*
+ * CSR Rel Bit, 1'b0 = relative (offset from feature DFH start),
+ * 1'b1 = absolute (ARM or other non-PCIe use)
+ */
+#define DFHv1_CSR_ADDR_REL	BIT_ULL(0)
+
+/* CSR Header Register Bit Definitions */
+#define DFHv1_CSR_ADDR_MASK       GENMASK_ULL(63, 1)  /* 63:1 of CSR address */
+
+/* CSR SIZE Goup Register Bit Definitions */
+#define DFHv1_CSR_SIZE_GRP_INSTANCE_ID	GENMASK_ULL(15, 0)	/* Enumeration instantiated IP */
+#define DFHv1_CSR_SIZE_GRP_GROUPING_ID	GENMASK_ULL(30, 16)	/* Group Features/interfaces */
+#define DFHv1_CSR_SIZE_GRP_HAS_PARAMS	BIT_ULL(31)		/* Presence of Parameters */
+#define DFHv1_CSR_SIZE_GRP_SIZE		GENMASK_ULL(63, 32)	/* Size of CSR Block in bytes */
+
+/* PARAM Header Register Bit Definitions */
+#define DFHv1_PARAM_HDR_ID		GENMASK_ULL(15, 0) /* Id of this Param  */
+#define DFHv1_PARAM_HDR_VER		GENMASK_ULL(31, 16) /* Version Param */
+#define DFHv1_PARAM_HDR_NEXT_OFFSET	GENMASK_ULL(63, 35) /* Offset of next Param */
+#define DFHv1_PARAM_HDR_NEXT_EOP	BIT_ULL(32)
+#define DFHv1_PARAM_DATA		0x08  /* Offset of Param data from Param header */
+
 /* Next AFU Register Bitfield */
 #define NEXT_AFU_NEXT_DFH_OFST	GENMASK_ULL(23, 0)	/* Offset to next AFU */
 
-- 
2.25.1