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Date: Fri, 16 Jul 2021 17:22:03 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Bhaumik Bhatt <bbhatt@...eaurora.org>
Cc: linux-arm-msm@...r.kernel.org, hemantk@...eaurora.org,
jhugo@...eaurora.org, linux-kernel@...r.kernel.org,
loic.poulain@...aro.org
Subject: Re: [PATCH] bus: mhi: core: Replace DMA allocation wrappers with
original APIs
On Tue, Jun 22, 2021 at 01:07:08PM -0700, Bhaumik Bhatt wrote:
> There is nothing special done within the mhi_alloc_coherent() and
> the mhi_free_coherent() wrapper functions. They only directly
> call the equivalent DMA allocation functions. Replace them with
> the original function calls such that the implementation is clear
> and direct.
There you go :) I was tempted to do this for a while...
>
> Signed-off-by: Bhaumik Bhatt <bbhatt@...eaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Thanks,
Mani
> ---
> drivers/bus/mhi/core/boot.c | 17 +++++++++--------
> drivers/bus/mhi/core/init.c | 32 ++++++++++++++++----------------
> drivers/bus/mhi/core/internal.h | 20 --------------------
> drivers/bus/mhi/core/main.c | 6 +++---
> 4 files changed, 28 insertions(+), 47 deletions(-)
>
> diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c
> index 8100cf5..0a97262 100644
> --- a/drivers/bus/mhi/core/boot.c
> +++ b/drivers/bus/mhi/core/boot.c
> @@ -302,8 +302,8 @@ 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_buf->dma_addr);
> + dma_free_coherent(mhi_cntrl->cntrl_dev, mhi_buf->len,
> + mhi_buf->buf, mhi_buf->dma_addr);
>
> kfree(image_info->mhi_buf);
> kfree(image_info);
> @@ -339,8 +339,8 @@ 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->dma_addr,
> + mhi_buf->buf = dma_alloc_coherent(mhi_cntrl->cntrl_dev,
> + vec_size, &mhi_buf->dma_addr,
> GFP_KERNEL);
> if (!mhi_buf->buf)
> goto error_alloc_segment;
> @@ -354,8 +354,8 @@ 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_buf->dma_addr);
> + dma_free_coherent(mhi_cntrl->cntrl_dev, mhi_buf->len,
> + mhi_buf->buf, mhi_buf->dma_addr);
>
> error_alloc_mhi_buf:
> kfree(img_info);
> @@ -442,7 +442,8 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl)
> if (size > firmware->size)
> size = firmware->size;
>
> - buf = mhi_alloc_coherent(mhi_cntrl, size, &dma_addr, GFP_KERNEL);
> + buf = dma_alloc_coherent(mhi_cntrl->cntrl_dev, size, &dma_addr,
> + GFP_KERNEL);
> if (!buf) {
> release_firmware(firmware);
> goto error_fw_load;
> @@ -451,7 +452,7 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl)
> /* Download image using BHI */
> memcpy(buf, firmware->data, size);
> ret = mhi_fw_load_bhi(mhi_cntrl, dma_addr, size);
> - mhi_free_coherent(mhi_cntrl, size, buf, dma_addr);
> + dma_free_coherent(mhi_cntrl->cntrl_dev, size, buf, dma_addr);
>
> /* Error or in EDL mode, we're done */
> if (ret) {
> diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
> index 4446760..c7ba715 100644
> --- a/drivers/bus/mhi/core/init.c
> +++ b/drivers/bus/mhi/core/init.c
> @@ -129,7 +129,7 @@ static int mhi_alloc_aligned_ring(struct mhi_controller *mhi_cntrl,
> u64 len)
> {
> ring->alloc_size = len + (len - 1);
> - ring->pre_aligned = mhi_alloc_coherent(mhi_cntrl, ring->alloc_size,
> + ring->pre_aligned = dma_alloc_coherent(mhi_cntrl->cntrl_dev, ring->alloc_size,
> &ring->dma_handle, GFP_KERNEL);
> if (!ring->pre_aligned)
> return -ENOMEM;
> @@ -221,13 +221,13 @@ void mhi_deinit_dev_ctxt(struct mhi_controller *mhi_cntrl)
> mhi_cmd = mhi_cntrl->mhi_cmd;
> for (i = 0; i < NR_OF_CMD_RINGS; i++, mhi_cmd++) {
> ring = &mhi_cmd->ring;
> - mhi_free_coherent(mhi_cntrl, ring->alloc_size,
> + dma_free_coherent(mhi_cntrl->cntrl_dev, ring->alloc_size,
> ring->pre_aligned, ring->dma_handle);
> ring->base = NULL;
> ring->iommu_base = 0;
> }
>
> - mhi_free_coherent(mhi_cntrl,
> + dma_free_coherent(mhi_cntrl->cntrl_dev,
> sizeof(*mhi_ctxt->cmd_ctxt) * NR_OF_CMD_RINGS,
> mhi_ctxt->cmd_ctxt, mhi_ctxt->cmd_ctxt_addr);
>
> @@ -237,17 +237,17 @@ void mhi_deinit_dev_ctxt(struct mhi_controller *mhi_cntrl)
> continue;
>
> ring = &mhi_event->ring;
> - mhi_free_coherent(mhi_cntrl, ring->alloc_size,
> + dma_free_coherent(mhi_cntrl->cntrl_dev, ring->alloc_size,
> ring->pre_aligned, ring->dma_handle);
> ring->base = NULL;
> ring->iommu_base = 0;
> }
>
> - mhi_free_coherent(mhi_cntrl, sizeof(*mhi_ctxt->er_ctxt) *
> + dma_free_coherent(mhi_cntrl->cntrl_dev, sizeof(*mhi_ctxt->er_ctxt) *
> mhi_cntrl->total_ev_rings, mhi_ctxt->er_ctxt,
> mhi_ctxt->er_ctxt_addr);
>
> - mhi_free_coherent(mhi_cntrl, sizeof(*mhi_ctxt->chan_ctxt) *
> + dma_free_coherent(mhi_cntrl->cntrl_dev, sizeof(*mhi_ctxt->chan_ctxt) *
> mhi_cntrl->max_chan, mhi_ctxt->chan_ctxt,
> mhi_ctxt->chan_ctxt_addr);
>
> @@ -275,7 +275,7 @@ int mhi_init_dev_ctxt(struct mhi_controller *mhi_cntrl)
> return -ENOMEM;
>
> /* Setup channel ctxt */
> - mhi_ctxt->chan_ctxt = mhi_alloc_coherent(mhi_cntrl,
> + mhi_ctxt->chan_ctxt = dma_alloc_coherent(mhi_cntrl->cntrl_dev,
> sizeof(*mhi_ctxt->chan_ctxt) *
> mhi_cntrl->max_chan,
> &mhi_ctxt->chan_ctxt_addr,
> @@ -307,7 +307,7 @@ int mhi_init_dev_ctxt(struct mhi_controller *mhi_cntrl)
> }
>
> /* Setup event context */
> - mhi_ctxt->er_ctxt = mhi_alloc_coherent(mhi_cntrl,
> + mhi_ctxt->er_ctxt = dma_alloc_coherent(mhi_cntrl->cntrl_dev,
> sizeof(*mhi_ctxt->er_ctxt) *
> mhi_cntrl->total_ev_rings,
> &mhi_ctxt->er_ctxt_addr,
> @@ -354,7 +354,7 @@ int mhi_init_dev_ctxt(struct mhi_controller *mhi_cntrl)
>
> /* Setup cmd context */
> ret = -ENOMEM;
> - mhi_ctxt->cmd_ctxt = mhi_alloc_coherent(mhi_cntrl,
> + mhi_ctxt->cmd_ctxt = dma_alloc_coherent(mhi_cntrl->cntrl_dev,
> sizeof(*mhi_ctxt->cmd_ctxt) *
> NR_OF_CMD_RINGS,
> &mhi_ctxt->cmd_ctxt_addr,
> @@ -389,10 +389,10 @@ int mhi_init_dev_ctxt(struct mhi_controller *mhi_cntrl)
> for (--i, --mhi_cmd; i >= 0; i--, mhi_cmd--) {
> struct mhi_ring *ring = &mhi_cmd->ring;
>
> - mhi_free_coherent(mhi_cntrl, ring->alloc_size,
> + dma_free_coherent(mhi_cntrl->cntrl_dev, ring->alloc_size,
> ring->pre_aligned, ring->dma_handle);
> }
> - mhi_free_coherent(mhi_cntrl,
> + dma_free_coherent(mhi_cntrl->cntrl_dev,
> sizeof(*mhi_ctxt->cmd_ctxt) * NR_OF_CMD_RINGS,
> mhi_ctxt->cmd_ctxt, mhi_ctxt->cmd_ctxt_addr);
> i = mhi_cntrl->total_ev_rings;
> @@ -405,15 +405,15 @@ int mhi_init_dev_ctxt(struct mhi_controller *mhi_cntrl)
> if (mhi_event->offload_ev)
> continue;
>
> - mhi_free_coherent(mhi_cntrl, ring->alloc_size,
> + dma_free_coherent(mhi_cntrl->cntrl_dev, ring->alloc_size,
> ring->pre_aligned, ring->dma_handle);
> }
> - mhi_free_coherent(mhi_cntrl, sizeof(*mhi_ctxt->er_ctxt) *
> + dma_free_coherent(mhi_cntrl->cntrl_dev, sizeof(*mhi_ctxt->er_ctxt) *
> mhi_cntrl->total_ev_rings, mhi_ctxt->er_ctxt,
> mhi_ctxt->er_ctxt_addr);
>
> error_alloc_er_ctxt:
> - mhi_free_coherent(mhi_cntrl, sizeof(*mhi_ctxt->chan_ctxt) *
> + dma_free_coherent(mhi_cntrl->cntrl_dev, sizeof(*mhi_ctxt->chan_ctxt) *
> mhi_cntrl->max_chan, mhi_ctxt->chan_ctxt,
> mhi_ctxt->chan_ctxt_addr);
>
> @@ -567,7 +567,7 @@ void mhi_deinit_chan_ctxt(struct mhi_controller *mhi_cntrl,
> if (!chan_ctxt->rbase) /* Already uninitialized */
> return;
>
> - mhi_free_coherent(mhi_cntrl, tre_ring->alloc_size,
> + dma_free_coherent(mhi_cntrl->cntrl_dev, tre_ring->alloc_size,
> tre_ring->pre_aligned, tre_ring->dma_handle);
> vfree(buf_ring->base);
>
> @@ -610,7 +610,7 @@ int mhi_init_chan_ctxt(struct mhi_controller *mhi_cntrl,
> buf_ring->base = vzalloc(buf_ring->len);
>
> if (!buf_ring->base) {
> - mhi_free_coherent(mhi_cntrl, tre_ring->alloc_size,
> + dma_free_coherent(mhi_cntrl->cntrl_dev, tre_ring->alloc_size,
> tre_ring->pre_aligned, tre_ring->dma_handle);
> return -ENOMEM;
> }
> diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h
> index 672052f..b5594fa 100644
> --- a/drivers/bus/mhi/core/internal.h
> +++ b/drivers/bus/mhi/core/internal.h
> @@ -690,26 +690,6 @@ void mhi_deinit_chan_ctxt(struct mhi_controller *mhi_cntrl,
> void mhi_reset_chan(struct mhi_controller *mhi_cntrl,
> struct mhi_chan *mhi_chan);
>
> -/* Memory allocation methods */
> -static inline void *mhi_alloc_coherent(struct mhi_controller *mhi_cntrl,
> - size_t size,
> - dma_addr_t *dma_handle,
> - gfp_t gfp)
> -{
> - void *buf = dma_alloc_coherent(mhi_cntrl->cntrl_dev, size, dma_handle,
> - gfp);
> -
> - return buf;
> -}
> -
> -static inline void mhi_free_coherent(struct mhi_controller *mhi_cntrl,
> - size_t size,
> - void *vaddr,
> - dma_addr_t dma_handle)
> -{
> - dma_free_coherent(mhi_cntrl->cntrl_dev, size, vaddr, dma_handle);
> -}
> -
> /* Event processing methods */
> void mhi_ctrl_ev_task(unsigned long data);
> void mhi_ev_task(unsigned long data);
> diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c
> index 02c8c09..409c68bc 100644
> --- a/drivers/bus/mhi/core/main.c
> +++ b/drivers/bus/mhi/core/main.c
> @@ -193,7 +193,7 @@ int mhi_map_single_no_bb(struct mhi_controller *mhi_cntrl,
> int mhi_map_single_use_bb(struct mhi_controller *mhi_cntrl,
> struct mhi_buf_info *buf_info)
> {
> - void *buf = mhi_alloc_coherent(mhi_cntrl, buf_info->len,
> + void *buf = dma_alloc_coherent(mhi_cntrl->cntrl_dev, buf_info->len,
> &buf_info->p_addr, GFP_ATOMIC);
>
> if (!buf)
> @@ -220,8 +220,8 @@ void mhi_unmap_single_use_bb(struct mhi_controller *mhi_cntrl,
> if (buf_info->dir == DMA_FROM_DEVICE)
> memcpy(buf_info->v_addr, buf_info->bb_addr, buf_info->len);
>
> - mhi_free_coherent(mhi_cntrl, buf_info->len, buf_info->bb_addr,
> - buf_info->p_addr);
> + dma_free_coherent(mhi_cntrl->cntrl_dev, buf_info->len,
> + buf_info->bb_addr, buf_info->p_addr);
> }
>
> static int get_nr_avail_ring_elements(struct mhi_controller *mhi_cntrl,
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
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