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authorDragan Cvetic <dragan.cvetic@xilinx.com>2019-07-27 09:33:53 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-08-15 17:54:37 +0200
commit20ec628e8007ec75c2f884e00004f39eab6289b5 (patch)
tree15bd55bdb46fbbc207e662cf6f54aa0ad0e5e1ac /include/uapi/misc
parent6f86ed820178ba35f87712548e6cd43b91608a6c (diff)
misc: xilinx_sdfec: Add ability to configure LDPC
Add the capability to configure LDPC mode via the ioctl XSDFEC_ADD_LDPC_CODE_PARAMS. Tested-by: Dragan Cvetic <dragan.cvetic@xilinx.com> Signed-off-by: Derek Kiernan <derek.kiernan@xilinx.com> Signed-off-by: Dragan Cvetic <dragan.cvetic@xilinx.com> Link: https://lore.kernel.org/r/1564216438-322406-4-git-send-email-dragan.cvetic@xilinx.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/uapi/misc')
-rw-r--r--include/uapi/misc/xilinx_sdfec.h98
1 files changed, 98 insertions, 0 deletions
diff --git a/include/uapi/misc/xilinx_sdfec.h b/include/uapi/misc/xilinx_sdfec.h
index 34f32c37261d..ce532a5e3e81 100644
--- a/include/uapi/misc/xilinx_sdfec.h
+++ b/include/uapi/misc/xilinx_sdfec.h
@@ -13,6 +13,22 @@
#include <linux/types.h>
+/* Shared LDPC Tables */
+#define XSDFEC_LDPC_SC_TABLE_ADDR_BASE (0x10000)
+#define XSDFEC_LDPC_SC_TABLE_ADDR_HIGH (0x10400)
+#define XSDFEC_LDPC_LA_TABLE_ADDR_BASE (0x18000)
+#define XSDFEC_LDPC_LA_TABLE_ADDR_HIGH (0x19000)
+#define XSDFEC_LDPC_QC_TABLE_ADDR_BASE (0x20000)
+#define XSDFEC_LDPC_QC_TABLE_ADDR_HIGH (0x28000)
+
+/* LDPC tables depth */
+#define XSDFEC_SC_TABLE_DEPTH \
+ (XSDFEC_LDPC_SC_TABLE_ADDR_HIGH - XSDFEC_LDPC_SC_TABLE_ADDR_BASE)
+#define XSDFEC_LA_TABLE_DEPTH \
+ (XSDFEC_LDPC_LA_TABLE_ADDR_HIGH - XSDFEC_LDPC_LA_TABLE_ADDR_BASE)
+#define XSDFEC_QC_TABLE_DEPTH \
+ (XSDFEC_LDPC_QC_TABLE_ADDR_HIGH - XSDFEC_LDPC_QC_TABLE_ADDR_BASE)
+
/**
* enum xsdfec_code - Code Type.
* @XSDFEC_TURBO_CODE: Driver is configured for Turbo mode.
@@ -127,6 +143,53 @@ struct xsdfec_turbo {
};
/**
+ * struct xsdfec_ldpc_params - User data for LDPC codes.
+ * @n: Number of code word bits
+ * @k: Number of information bits
+ * @psize: Size of sub-matrix
+ * @nlayers: Number of layers in code
+ * @nqc: Quasi Cyclic Number
+ * @nmqc: Number of M-sized QC operations in parity check matrix
+ * @nm: Number of M-size vectors in N
+ * @norm_type: Normalization required or not
+ * @no_packing: Determines if multiple QC ops should be performed
+ * @special_qc: Sub-Matrix property for Circulant weight > 0
+ * @no_final_parity: Decide if final parity check needs to be performed
+ * @max_schedule: Experimental code word scheduling limit
+ * @sc_off: SC offset
+ * @la_off: LA offset
+ * @qc_off: QC offset
+ * @sc_table: Pointer to SC Table which must be page aligned
+ * @la_table: Pointer to LA Table which must be page aligned
+ * @qc_table: Pointer to QC Table which must be page aligned
+ * @code_id: LDPC Code
+ *
+ * This structure describes the LDPC code that is passed to the driver by the
+ * application.
+ */
+struct xsdfec_ldpc_params {
+ __u32 n;
+ __u32 k;
+ __u32 psize;
+ __u32 nlayers;
+ __u32 nqc;
+ __u32 nmqc;
+ __u32 nm;
+ __u32 norm_type;
+ __u32 no_packing;
+ __u32 special_qc;
+ __u32 no_final_parity;
+ __u32 max_schedule;
+ __u32 sc_off;
+ __u32 la_off;
+ __u32 qc_off;
+ __u32 *sc_table;
+ __u32 *la_table;
+ __u32 *qc_table;
+ __u16 code_id;
+};
+
+/**
* struct xsdfec_status - Status of SD-FEC core.
* @state: State of the SD-FEC core
* @activity: Describes if the SD-FEC instance is Active
@@ -170,6 +233,20 @@ struct xsdfec_config {
__s8 code_wr_protect;
};
+/**
+ * struct xsdfec_ldpc_param_table_sizes - Used to store sizes of SD-FEC table
+ * entries for an individual LPDC code
+ * parameter.
+ * @sc_size: Size of SC table used
+ * @la_size: Size of LA table used
+ * @qc_size: Size of QC table used
+ */
+struct xsdfec_ldpc_param_table_sizes {
+ __u32 sc_size;
+ __u32 la_size;
+ __u32 qc_size;
+};
+
/*
* XSDFEC IOCTL List
*/
@@ -190,6 +267,27 @@ struct xsdfec_config {
*/
#define XSDFEC_SET_TURBO _IOW(XSDFEC_MAGIC, 4, struct xsdfec_turbo)
/**
+ * DOC: XSDFEC_ADD_LDPC_CODE_PARAMS
+ * @Parameters
+ *
+ * @struct xsdfec_ldpc_params *
+ * Pointer to the &struct xsdfec_ldpc_params that contains the LDPC code
+ * parameters to be added to the SD-FEC Block
+ *
+ * @Description
+ * ioctl to add an LDPC code to the SD-FEC LDPC codes
+ *
+ * This can only be used when:
+ *
+ * - Driver is in the XSDFEC_STOPPED state
+ *
+ * - SD-FEC core is configured as LPDC
+ *
+ * - SD-FEC Code Write Protection is disabled
+ */
+#define XSDFEC_ADD_LDPC_CODE_PARAMS \
+ _IOW(XSDFEC_MAGIC, 5, struct xsdfec_ldpc_params)
+/**
* DOC: XSDFEC_GET_TURBO
* @Parameters
*