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Commit 19498ab3 authored by Hemant Kumar's avatar Hemant Kumar Committed by Gerrit - the friendly Code Review server
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mhi: core: Add support to allocate contiguous phys mem for bhie table 



Contiguous phys memory is required per segment of the bhie table for
collecting rddm and fbc ram dumps.

Change-Id: Id21a34d4b22ed85cfa3fd559904c5a4602e5f8e7
Signed-off-by: default avatarHemant Kumar <hemantk@codeaurora.org>
parent 02974df6

drivers/bus/mhi/core/mhi_boot.c

+3 −3
Original line number Diff line number Diff line
@@ -306,7 +306,7 @@ void mhi_free_bhie_table(struct mhi_controller *mhi_cntrl, 
	struct mhi_buf *mhi_buf = image_info->mhi_buf;



	for (i = 0; i < image_info->entries; i++, mhi_buf++)

		mhi_free_coherent(mhi_cntrl, mhi_buf->len, mhi_buf->buf,

		mhi_free_contig_coherent(mhi_cntrl, mhi_buf->len, mhi_buf->buf,

				  mhi_buf->dma_addr);



	kfree(image_info->mhi_buf);
@@ -347,7 +347,7 @@ int mhi_alloc_bhie_table(struct mhi_controller *mhi_cntrl, 
			vec_size = sizeof(struct bhi_vec_entry) * i;



		mhi_buf->len = vec_size;

		mhi_buf->buf = mhi_alloc_coherent(mhi_cntrl, vec_size,

		mhi_buf->buf = mhi_alloc_contig_coherent(mhi_cntrl, vec_size,

					&mhi_buf->dma_addr, GFP_KERNEL);

		if (!mhi_buf->buf)

			goto error_alloc_segment;
@@ -366,7 +366,7 @@ int mhi_alloc_bhie_table(struct mhi_controller *mhi_cntrl, 


error_alloc_segment:

	for (--i, --mhi_buf; i >= 0; i--, mhi_buf--)

		mhi_free_coherent(mhi_cntrl, mhi_buf->len, mhi_buf->buf,

		mhi_free_contig_coherent(mhi_cntrl, mhi_buf->len, mhi_buf->buf,

				  mhi_buf->dma_addr);



error_alloc_mhi_buf:

drivers/bus/mhi/core/mhi_internal.h

+24 −0
Original line number Diff line number Diff line
@@ -847,6 +847,30 @@ static inline void mhi_free_coherent(struct mhi_controller *mhi_cntrl, 
	atomic_sub(size, &mhi_cntrl->alloc_size);

	dma_free_coherent(mhi_cntrl->dev, size, vaddr, dma_handle);

}



static inline void *mhi_alloc_contig_coherent(

					struct mhi_controller *mhi_cntrl,

					size_t size, dma_addr_t *dma_handle,

					gfp_t gfp)

{

	void *buf = dma_alloc_attrs(mhi_cntrl->dev, size, dma_handle, gfp,

					DMA_ATTR_FORCE_CONTIGUOUS);



	if (buf)

		atomic_add(size, &mhi_cntrl->alloc_size);



	return buf;

}

static inline void mhi_free_contig_coherent(

					struct mhi_controller *mhi_cntrl,

					size_t size, void *vaddr,

					dma_addr_t dma_handle)

{

	atomic_sub(size, &mhi_cntrl->alloc_size);

	dma_free_attrs(mhi_cntrl->dev, size, vaddr, dma_handle,

					DMA_ATTR_FORCE_CONTIGUOUS);

}



struct mhi_device *mhi_alloc_device(struct mhi_controller *mhi_cntrl);

static inline void mhi_dealloc_device(struct mhi_controller *mhi_cntrl,

				      struct mhi_device *mhi_dev)