drivers/crypto/intel/qat/qat_common/qat_uclo.c

Source file repositories/reference/linux-study-clean/drivers/crypto/intel/qat/qat_common/qat_uclo.c

File Facts

System
Linux kernel
Corpus path
drivers/crypto/intel/qat/qat_common/qat_uclo.c
Extension
.c
Size
67984 bytes
Lines
2292
Domain
Driver Families
Bucket
drivers/crypto
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (initmem->num_in_bytes) {
			if (qat_uclo_init_ae_memory(handle, initmem))
				return -EINVAL;
		}
		initmem = (struct icp_qat_uof_initmem *)((uintptr_t)(
			(uintptr_t)initmem +
			sizeof(struct icp_qat_uof_initmem)) +
			(sizeof(struct icp_qat_uof_memvar_attr) *
			initmem->val_attr_num));
	}

	for_each_set_bit(ae, &ae_mask, handle->hal_handle->ae_max_num) {
		if (qat_hal_batch_wr_lm(handle, ae,
					obj_handle->lm_init_tab[ae])) {
			pr_err("fail to batch init lmem for AE %d\n", ae);
			return -EINVAL;
		}
		qat_uclo_cleanup_batch_init_list(handle,
						 &obj_handle->lm_init_tab[ae]);
		qat_uclo_batch_wr_umem(handle, ae,
				       obj_handle->umem_init_tab[ae]);
		qat_uclo_cleanup_batch_init_list(handle,
						 &obj_handle->
						 umem_init_tab[ae]);
	}
	return 0;
}

static void *qat_uclo_find_chunk(struct icp_qat_uof_objhdr *obj_hdr,
				 char *chunk_id, void *cur)
{
	int i;
	struct icp_qat_uof_chunkhdr *chunk_hdr =
	    (struct icp_qat_uof_chunkhdr *)
	    ((uintptr_t)obj_hdr + sizeof(struct icp_qat_uof_objhdr));

	for (i = 0; i < obj_hdr->num_chunks; i++) {
		if ((cur < (void *)&chunk_hdr[i]) &&
		    !strncmp(chunk_hdr[i].chunk_id, chunk_id,
			     ICP_QAT_UOF_OBJID_LEN)) {
			return &chunk_hdr[i];
		}
	}
	return NULL;
}

static unsigned int qat_uclo_calc_checksum(unsigned int reg, int ch)
{
	int i;
	unsigned int topbit = 1 << 0xF;
	unsigned int inbyte = (unsigned int)((reg >> 0x18) ^ ch);

	reg ^= inbyte << 0x8;
	for (i = 0; i < 0x8; i++) {
		if (reg & topbit)
			reg = (reg << 1) ^ 0x1021;
		else
			reg <<= 1;
	}
	return reg & 0xFFFF;
}

static unsigned int qat_uclo_calc_str_checksum(char *ptr, int num)
{
	unsigned int chksum = 0;

	if (ptr)
		while (num--)
			chksum = qat_uclo_calc_checksum(chksum, *ptr++);
	return chksum;
}

static struct icp_qat_uclo_objhdr *
qat_uclo_map_chunk(char *buf, struct icp_qat_uof_filehdr *file_hdr,
		   char *chunk_id)
{
	struct icp_qat_uof_filechunkhdr *file_chunk;
	struct icp_qat_uclo_objhdr *obj_hdr;
	char *chunk;
	int i;

	file_chunk = (struct icp_qat_uof_filechunkhdr *)
		(buf + sizeof(struct icp_qat_uof_filehdr));
	for (i = 0; i < file_hdr->num_chunks; i++) {
		if (!strncmp(file_chunk->chunk_id, chunk_id,
			     ICP_QAT_UOF_OBJID_LEN)) {
			chunk = buf + file_chunk->offset;
			if (file_chunk->checksum != qat_uclo_calc_str_checksum(
				chunk, file_chunk->size))
				break;

Annotation

Implementation Notes