Commit 1a03964d authored by Stephen Boyd's avatar Stephen Boyd Committed by Andy Gross
Browse files

soc: qcom: Make qcom_smem_get() return a pointer 



Passing a void ** almost always requires a cast at the call site.
Instead of littering the code with casts every time this function
is called, have qcom_smem_get() return a void pointer to the
location of the smem item. This frees the caller from having to
cast the pointer.

Cc: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
Reviewed-by: default avatarBjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: default avatarAndy Gross <agross@codeaurora.org>
parent 7d0c8bee

drivers/soc/qcom/smd.c

+15 −15
Original line number Diff line number Diff line
@@ -989,10 +989,11 @@ static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *ed 
	spin_lock_init(&channel->recv_lock);

	init_waitqueue_head(&channel->fblockread_event);



	ret = qcom_smem_get(edge->remote_pid, smem_info_item, (void **)&info,

			    &info_size);

	if (ret)

	info = qcom_smem_get(edge->remote_pid, smem_info_item, &info_size);

	if (IS_ERR(info)) {

		ret = PTR_ERR(info);

		goto free_name_and_channel;

	}



	/*

	 * Use the size of the item to figure out which channel info struct to
@@ -1011,10 +1012,11 @@ static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *ed 
		goto free_name_and_channel;

	}



	ret = qcom_smem_get(edge->remote_pid, smem_fifo_item, &fifo_base,

			    &fifo_size);

	if (ret)

	fifo_base = qcom_smem_get(edge->remote_pid, smem_fifo_item, &fifo_size);

	if (IS_ERR(fifo_base)) {

		ret =  PTR_ERR(fifo_base);

		goto free_name_and_channel;

	}



	/* The channel consist of a rx and tx fifo of equal size */

	fifo_size /= 2;
@@ -1051,16 +1053,13 @@ static void qcom_discover_channels(struct qcom_smd_edge *edge) 
	unsigned long flags;

	unsigned fifo_id;

	unsigned info_id;

	int ret;

	int tbl;

	int i;



	for (tbl = 0; tbl < SMD_ALLOC_TBL_COUNT; tbl++) {

		ret = qcom_smem_get(edge->remote_pid,

				    smem_items[tbl].alloc_tbl_id,

				    (void **)&alloc_tbl,

				    NULL);

		if (ret < 0)

		alloc_tbl = qcom_smem_get(edge->remote_pid,

				    smem_items[tbl].alloc_tbl_id, NULL);

		if (IS_ERR(alloc_tbl))

			continue;



		for (i = 0; i < SMD_ALLOC_TBL_SIZE; i++) {
@@ -1238,11 +1237,12 @@ static int qcom_smd_probe(struct platform_device *pdev) 
	int num_edges;

	int ret;

	int i = 0;

	void *p;



	/* Wait for smem */

	ret = qcom_smem_get(QCOM_SMEM_HOST_ANY, smem_items[0].alloc_tbl_id, NULL, NULL);

	if (ret == -EPROBE_DEFER)

		return ret;

	p = qcom_smem_get(QCOM_SMEM_HOST_ANY, smem_items[0].alloc_tbl_id, NULL);

	if (PTR_ERR(p) == -EPROBE_DEFER)

		return PTR_ERR(p);



	num_edges = of_get_available_child_count(pdev->dev.of_node);

	array_size = sizeof(*smd) + num_edges * sizeof(struct qcom_smd_edge);

drivers/soc/qcom/smem.c

+32 −40
Original line number Diff line number Diff line
@@ -378,9 +378,8 @@ int qcom_smem_alloc(unsigned host, unsigned item, size_t size) 
}

EXPORT_SYMBOL(qcom_smem_alloc);



static int qcom_smem_get_global(struct qcom_smem *smem,

static void *qcom_smem_get_global(struct qcom_smem *smem,

				  unsigned item,

				void **ptr,

				  size_t *size)

{

	struct smem_header *header;
@@ -390,35 +389,31 @@ static int qcom_smem_get_global(struct qcom_smem *smem, 
	unsigned i;



	if (WARN_ON(item >= SMEM_ITEM_COUNT))

		return -EINVAL;

		return ERR_PTR(-EINVAL);



	header = smem->regions[0].virt_base;

	entry = &header->toc[item];

	if (!entry->allocated)

		return -ENXIO;

		return ERR_PTR(-ENXIO);



	if (ptr != NULL) {

	aux_base = entry->aux_base & AUX_BASE_MASK;



	for (i = 0; i < smem->num_regions; i++) {

		area = &smem->regions[i];



		if (area->aux_base == aux_base || !aux_base) {

				*ptr = area->virt_base + entry->offset;

				break;

			}

		}

	}

			if (size != NULL)

				*size = entry->size;

			return area->virt_base + entry->offset;

		}

	}



	return 0;

	return ERR_PTR(-ENOENT);

}



static int qcom_smem_get_private(struct qcom_smem *smem,

static void *qcom_smem_get_private(struct qcom_smem *smem,

				   unsigned host,

				   unsigned item,

				 void **ptr,

				   size_t *size)

{

	struct smem_partition_header *phdr;
@@ -435,55 +430,54 @@ static int qcom_smem_get_private(struct qcom_smem *smem, 
			dev_err(smem->dev,

				"Found invalid canary in host %d partition\n",

				host);

			return -EINVAL;

			return ERR_PTR(-EINVAL);

		}



		if (hdr->item == item) {

			if (ptr != NULL)

				*ptr = p + sizeof(*hdr) + hdr->padding_hdr;



			if (size != NULL)

				*size = hdr->size - hdr->padding_data;



			return 0;

			return p + sizeof(*hdr) + hdr->padding_hdr;

		}



		p += sizeof(*hdr) + hdr->padding_hdr + hdr->size;

	}



	return -ENOENT;

	return ERR_PTR(-ENOENT);

}



/**

 * qcom_smem_get() - resolve ptr of size of a smem item

 * @host:	the remote processor, or -1

 * @item:	smem item handle

 * @ptr:	pointer to be filled out with address of the item

 * @size:	pointer to be filled out with size of the item

 *

 * Looks up pointer and size of a smem item.

 * Looks up smem item and returns pointer to it. Size of smem

 * item is returned in @size.

 */

int qcom_smem_get(unsigned host, unsigned item, void **ptr, size_t *size)

void *qcom_smem_get(unsigned host, unsigned item, size_t *size)

{

	unsigned long flags;

	int ret;

	void *ptr = ERR_PTR(-EPROBE_DEFER);



	if (!__smem)

		return -EPROBE_DEFER;

		return ptr;



	ret = hwspin_lock_timeout_irqsave(__smem->hwlock,

					  HWSPINLOCK_TIMEOUT,

					  &flags);

	if (ret)

		return ret;

		return ERR_PTR(ret);



	if (host < SMEM_HOST_COUNT && __smem->partitions[host])

		ret = qcom_smem_get_private(__smem, host, item, ptr, size);

		ptr = qcom_smem_get_private(__smem, host, item, size);

	else

		ret = qcom_smem_get_global(__smem, item, ptr, size);

		ptr = qcom_smem_get_global(__smem, item, size);



	hwspin_unlock_irqrestore(__smem->hwlock, &flags);

	return ret;



	return ptr;



}

EXPORT_SYMBOL(qcom_smem_get);
@@ -520,11 +514,9 @@ static int qcom_smem_get_sbl_version(struct qcom_smem *smem) 
{

	unsigned *versions;

	size_t size;

	int ret;



	ret = qcom_smem_get_global(smem, SMEM_ITEM_VERSION,

				   (void **)&versions, &size);

	if (ret < 0) {

	versions = qcom_smem_get_global(smem, SMEM_ITEM_VERSION, &size);

	if (IS_ERR(versions)) {

		dev_err(smem->dev, "Unable to read the version item\n");

		return -ENOENT;

	}

include/linux/soc/qcom/smem.h

+1 −1
Original line number Diff line number Diff line
@@ -4,7 +4,7 @@ 
#define QCOM_SMEM_HOST_ANY -1



int qcom_smem_alloc(unsigned host, unsigned item, size_t size);

int qcom_smem_get(unsigned host, unsigned item, void **ptr, size_t *size);

void *qcom_smem_get(unsigned host, unsigned item, size_t *size);



int qcom_smem_get_free_space(unsigned host);

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