diff options
Diffstat (limited to 'drivers/crypto/qat/qat_common/qat_bl.c')
| -rw-r--r-- | drivers/crypto/qat/qat_common/qat_bl.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/drivers/crypto/qat/qat_common/qat_bl.c b/drivers/crypto/qat/qat_common/qat_bl.c index 221a4eb610a3..2e89ff08041b 100644 --- a/drivers/crypto/qat/qat_common/qat_bl.c +++ b/drivers/crypto/qat/qat_common/qat_bl.c @@ -222,3 +222,162 @@ int qat_bl_sgl_to_bufl(struct adf_accel_dev *accel_dev, extra_dst_buff, sz_extra_dst_buff, flags); } + +static void qat_bl_sgl_unmap(struct adf_accel_dev *accel_dev, + struct qat_alg_buf_list *bl) +{ + struct device *dev = &GET_DEV(accel_dev); + int n = bl->num_bufs; + int i; + + for (i = 0; i < n; i++) + if (!dma_mapping_error(dev, bl->bufers[i].addr)) + dma_unmap_single(dev, bl->bufers[i].addr, + bl->bufers[i].len, DMA_FROM_DEVICE); +} + +static int qat_bl_sgl_map(struct adf_accel_dev *accel_dev, + struct scatterlist *sgl, + struct qat_alg_buf_list **bl) +{ + struct device *dev = &GET_DEV(accel_dev); + struct qat_alg_buf_list *bufl; + int node = dev_to_node(dev); + struct scatterlist *sg; + int n, i, sg_nctr; + size_t sz; + + n = sg_nents(sgl); + sz = struct_size(bufl, bufers, n); + bufl = kzalloc_node(sz, GFP_KERNEL, node); + if (unlikely(!bufl)) + return -ENOMEM; + + for (i = 0; i < n; i++) + bufl->bufers[i].addr = DMA_MAPPING_ERROR; + + sg_nctr = 0; + for_each_sg(sgl, sg, n, i) { + int y = sg_nctr; + + if (!sg->length) + continue; + + bufl->bufers[y].addr = dma_map_single(dev, sg_virt(sg), + sg->length, + DMA_FROM_DEVICE); + bufl->bufers[y].len = sg->length; + if (unlikely(dma_mapping_error(dev, bufl->bufers[y].addr))) + goto err_map; + sg_nctr++; + } + bufl->num_bufs = sg_nctr; + bufl->num_mapped_bufs = sg_nctr; + + *bl = bufl; + + return 0; + +err_map: + for (i = 0; i < n; i++) + if (!dma_mapping_error(dev, bufl->bufers[i].addr)) + dma_unmap_single(dev, bufl->bufers[i].addr, + bufl->bufers[i].len, + DMA_FROM_DEVICE); + kfree(bufl); + *bl = NULL; + + return -ENOMEM; +} + +static void qat_bl_sgl_free_unmap(struct adf_accel_dev *accel_dev, + struct scatterlist *sgl, + struct qat_alg_buf_list *bl, + bool free_bl) +{ + if (bl) { + qat_bl_sgl_unmap(accel_dev, bl); + + if (free_bl) + kfree(bl); + } + if (sgl) + sgl_free(sgl); +} + +static int qat_bl_sgl_alloc_map(struct adf_accel_dev *accel_dev, + struct scatterlist **sgl, + struct qat_alg_buf_list **bl, + unsigned int dlen, + gfp_t gfp) +{ + struct scatterlist *dst; + int ret; + + dst = sgl_alloc(dlen, gfp, NULL); + if (!dst) { + dev_err(&GET_DEV(accel_dev), "sg_alloc failed\n"); + return -ENOMEM; + } + + ret = qat_bl_sgl_map(accel_dev, dst, bl); + if (ret) + goto err; + + *sgl = dst; + + return 0; + +err: + sgl_free(dst); + *sgl = NULL; + return ret; +} + +int qat_bl_realloc_map_new_dst(struct adf_accel_dev *accel_dev, + struct scatterlist **sg, + unsigned int dlen, + struct qat_request_buffs *qat_bufs, + gfp_t gfp) +{ + struct device *dev = &GET_DEV(accel_dev); + dma_addr_t new_blp = DMA_MAPPING_ERROR; + struct qat_alg_buf_list *new_bl; + struct scatterlist *new_sg; + size_t new_bl_size; + int ret; + + ret = qat_bl_sgl_alloc_map(accel_dev, &new_sg, &new_bl, dlen, gfp); + if (ret) + return ret; + + new_bl_size = struct_size(new_bl, bufers, new_bl->num_bufs); + + /* Map new firmware SGL descriptor */ + new_blp = dma_map_single(dev, new_bl, new_bl_size, DMA_TO_DEVICE); + if (unlikely(dma_mapping_error(dev, new_blp))) + goto err; + + /* Unmap old firmware SGL descriptor */ + dma_unmap_single(dev, qat_bufs->bloutp, qat_bufs->sz_out, DMA_TO_DEVICE); + + /* Free and unmap old scatterlist */ + qat_bl_sgl_free_unmap(accel_dev, *sg, qat_bufs->blout, + !qat_bufs->sgl_dst_valid); + + qat_bufs->sgl_dst_valid = false; + qat_bufs->blout = new_bl; + qat_bufs->bloutp = new_blp; + qat_bufs->sz_out = new_bl_size; + + *sg = new_sg; + + return 0; +err: + qat_bl_sgl_free_unmap(accel_dev, new_sg, new_bl, true); + + if (!dma_mapping_error(dev, new_blp)) + dma_unmap_single(dev, new_blp, new_bl_size, DMA_TO_DEVICE); + + return -ENOMEM; +} |