/** * struct ddcb - Device Driver Control Block DDCB * @hsi: Hardware software interlock * @shi: Software hardware interlock. Hsi and shi are used to interlock * software and hardware activities. We are using a compare and * swap operation to ensure that there are no races when * activating new DDCBs on the queue, or when we need to * purge a DDCB from a running queue. * @acfunc: Accelerator function addresses a unit within the chip * @cmd: Command to work on * @cmdopts_16: Options for the command * @asiv: Input data * @asv: Output data * * The DDCB data format is big endian. Multiple consequtive DDBCs form * a DDCB queue.
*/ #define ASIV_LENGTH 104 /* Old specification without ATS field */ #define ASIV_LENGTH_ATS 96 /* New specification with ATS field */ #define ASV_LENGTH 64
/* The following layout matches the new service layer format */
__be32 ibdc_32; /* Inbound Data Count (* 256) */
__be32 obdc_32; /* Outbound Data Count (* 256) */
__be64 rsvd_SLH_64; /* Reserved for hardware */ union { /* private data for driver */
u8 priv[8];
__be64 priv_64;
};
__be64 disp_ts_64; /* Dispatch TimeStamp */
} __attribute__((__packed__));
/* CRC polynomials for DDCB */ #define CRC16_POLYNOMIAL 0x1021
/* * SHI: Software to Hardware Interlock * This 1 byte field is written by software to interlock the * movement of one queue entry to another with the hardware in the * chip.
*/ #define DDCB_SHI_INTR 0x04 /* Bit 2 */ #define DDCB_SHI_PURGE 0x02 /* Bit 1 */ #define DDCB_SHI_NEXT 0x01 /* Bit 0 */
/* * HSI: Hardware to Software interlock * This 1 byte field is written by hardware to interlock the movement * of one queue entry to another with the software in the chip.
*/ #define DDCB_HSI_COMPLETED 0x40 /* Bit 6 */ #define DDCB_HSI_FETCHED 0x04 /* Bit 2 */
/* * Accessing HSI/SHI is done 32-bit wide * Normally 16-bit access would work too, but on some platforms the * 16 compare and swap operation is not supported. Therefore * switching to 32-bit such that those platforms will work too. * * iCRC HSI/SHI
*/ #define DDCB_INTR_BE32 cpu_to_be32(0x00000004) #define DDCB_PURGE_BE32 cpu_to_be32(0x00000002) #define DDCB_NEXT_BE32 cpu_to_be32(0x00000001) #define DDCB_COMPLETED_BE32 cpu_to_be32(0x00004000) #define DDCB_FETCHED_BE32 cpu_to_be32(0x00000400)
/* Definitions of DDCB presets */ #define DDCB_PRESET_PRE 0x80 #define ICRC_LENGTH(n) ((n) + 8 + 8 + 8) /* used ASIV + hdr fields */ #define VCRC_LENGTH(n) ((n)) /* used ASV */
/* * Genwqe Scatter Gather list * Each element has up to 8 entries. * The chaining element is element 0 cause of prefetching needs.
*/
/* * 0b0110 Chained descriptor. The descriptor is describing the next * descriptor list.
*/ #define SG_CHAINED (0x6)
/* * 0b0010 First entry of a descriptor list. Start from a Buffer-Empty * condition.
*/ #define SG_DATA (0x2)
/* * 0b0000 Early terminator. This is the last entry on the list * irregardless of the length indicated.
*/ #define SG_END_LIST (0x0)
/** * struct sglist - Scatter gather list * @target_addr: Either a dma addr of memory to work on or a * dma addr or a subsequent sglist block. * @len: Length of the data block. * @flags: See above. * * Depending on the command the GenWQE card can use a scatter gather * list to describe the memory it works on. Always 8 sg_entry's form * a block.
*/ struct sg_entry {
__be64 target_addr;
__be32 len;
__be32 flags;
};
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