diff options
Diffstat (limited to 'sys/dev/ioat/ioat.h')
| -rw-r--r-- | sys/dev/ioat/ioat.h | 57 |
1 files changed, 56 insertions, 1 deletions
diff --git a/sys/dev/ioat/ioat.h b/sys/dev/ioat/ioat.h index ff05602..2e10124 100644 --- a/sys/dev/ioat/ioat.h +++ b/sys/dev/ioat/ioat.h @@ -52,7 +52,26 @@ __FBSDID("$FreeBSD$"); * may be prefetched before operation 1 completes. */ #define DMA_FENCE 0x4 -#define DMA_ALL_FLAGS (DMA_INT_EN | DMA_NO_WAIT | DMA_FENCE) +#define _DMA_GENERIC_FLAGS (DMA_INT_EN | DMA_NO_WAIT | DMA_FENCE) + +/* + * Emit a CRC32C as the result of a ioat_copy_crc() or ioat_crc(). + */ +#define DMA_CRC_STORE 0x8 + +/* + * Compare the CRC32C of a ioat_copy_crc() or ioat_crc() against an expeceted + * value. It is invalid to specify both TEST and STORE. + */ +#define DMA_CRC_TEST 0x10 +#define _DMA_CRC_TESTSTORE (DMA_CRC_STORE | DMA_CRC_TEST) + +/* + * Use an inline comparison CRC32C or emit an inline CRC32C result. Invalid + * without one of STORE or TEST. + */ +#define DMA_CRC_INLINE 0x20 +#define _DMA_CRC_FLAGS (DMA_CRC_STORE | DMA_CRC_TEST | DMA_CRC_INLINE) /* * Hardware revision number. Different hardware revisions support different @@ -152,6 +171,42 @@ struct bus_dmadesc *ioat_copy_8k_aligned(bus_dmaengine_t dmaengine, bus_dmaengine_callback_t callback_fn, void *callback_arg, uint32_t flags); /* + * Copy len bytes from dst to src, like ioat_copy(). + * + * Additionally, accumulate a CRC32C of the data. + * + * If initialseed is not NULL, the value it points to is used to seed the + * initial value of the CRC32C. + * + * If flags include DMA_CRC_STORE and not DMA_CRC_INLINE, crcptr is written + * with the 32-bit CRC32C result (in wire format). + * + * If flags include DMA_CRC_TEST and not DMA_CRC_INLINE, the computed CRC32C is + * compared with the 32-bit CRC32C pointed to by crcptr. If they do not match, + * a channel error is raised. + * + * If the DMA_CRC_INLINE flag is set, crcptr is ignored and the DMA engine uses + * the 4 bytes trailing the source data (TEST) or the destination data (STORE). + */ +struct bus_dmadesc *ioat_copy_crc(bus_dmaengine_t dmaengine, bus_addr_t dst, + bus_addr_t src, bus_size_t len, uint32_t *initialseed, bus_addr_t crcptr, + bus_dmaengine_callback_t callback_fn, void *callback_arg, uint32_t flags); + +/* + * ioat_crc() is nearly identical to ioat_copy_crc(), but does not actually + * move data around. + * + * Like ioat_copy_crc, ioat_crc computes a CRC32C over len bytes pointed to by + * src. The flags affect its operation in the same way, with one exception: + * + * If flags includes both DMA_CRC_STORE and DMA_CRC_INLINE, the computed CRC32C + * is written to the 4 bytes trailing the *source* data. + */ +struct bus_dmadesc *ioat_crc(bus_dmaengine_t dmaengine, bus_addr_t src, + bus_size_t len, uint32_t *initialseed, bus_addr_t crcptr, + bus_dmaengine_callback_t callback_fn, void *callback_arg, uint32_t flags); + +/* * Issues a null operation. This issues the operation to the hardware, but the * hardware doesn't do anything with it. */ |
