On Wed, Jul 15, 2015 at 11:58:06AM -0700, Bjorn Andersson wrote:
<snip>
> +int __qcom_scm_pas_init_image(u32 peripheral, const void *metadata, size_t size)
> +{
> + dma_addr_t mdata_phys;
> + void *mdata_buf;
> + __le32 scm_ret;
> + int ret;
> + struct pas_init_image_req {
> + __le32 proc;
> + __le32 image_addr;
> + } request;
> +
> + /*
> + * During the scm call memory protection will be enabled for the meta
> + * data blob, so make sure it's physically contiguous, 4K aligned and
> + * non-cachable to avoid XPU violations.
> + */
> + mdata_buf = dma_alloc_coherent(NULL, size, &mdata_phys, GFP_KERNEL);
It'd be nice to send in the dev so we can attribute the allocation correctly.
For 64 bit, we actually have to do this because NULL is not allowed right now.
> + if (!mdata_buf) {
> + pr_err("Allocation of metadata buffer failed.\n");
> + return -ENOMEM;
> + }
> + memcpy(mdata_buf, metadata, size);
> +
> + request.proc = cpu_to_le32(peripheral);
> + request.image_addr = cpu_to_le32(mdata_phys);
> +
> + ret = qcom_scm_call(QCOM_SCM_SVC_PIL, QCOM_SCM_PAS_INIT_IMAGE_CMD,
> + &request, sizeof(request),
> + &scm_ret, sizeof(scm_ret));
> +
> + dma_free_coherent(NULL, size, mdata_buf, mdata_phys);
> +
> + return ret ? : le32_to_cpu(scm_ret);
> +}
> +
Otherwise, looks good. Let me know if you plan to modify for the device above.
If you want me to do it later, thats fine. But it means API change.
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