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Commit 6e974166 authored by Mitchel Humpherys's avatar Mitchel Humpherys
Browse files

msm: ADSPRPC: Add mappings to IOMMU for remote heap 



The remote heap buffers need to be mapped and unmapped in
the IOMMU when SMMU is present on the remote processor.

Change-Id: I9d78e1098a4163109dbde4c23681be4cfb8a353a
Acked-by: default avatarSathish Ambley <sambley@qti.qualcomm.com>
Signed-off-by: default avatarMitchel Humpherys <mitchelh@codeaurora.org>
parent bfd7e850

drivers/char/adsprpc.c

+27 −8
Original line number Diff line number Diff line
@@ -170,6 +170,7 @@ struct fastrpc_mmap { 
	struct hlist_node hn;

	struct ion_handle *handle;

	void *virt;

	ion_phys_addr_t phys;

	uint32_t vaddrin;

	uint32_t vaddrout;

	int size;
@@ -237,10 +238,15 @@ static void free_mem(struct fastrpc_buf *buf, int cid) 
	}

}



static void free_map(struct fastrpc_mmap *map)

static void free_map(struct fastrpc_mmap *map, int cid)

{

	struct fastrpc_apps *me = &gfa;

	if (!IS_ERR_OR_NULL(map->handle)) {

		if (me->channel[cid].smmu.enabled && map->phys) {

			ion_unmap_iommu(me->iclient, map->handle,

					me->channel[cid].smmu.domain_id, 0);

			map->phys = 0;

		}

		if (!IS_ERR_OR_NULL(map->virt)) {

			ion_unmap_kernel(me->iclient, map->handle);

			map->virt = 0;
@@ -1042,7 +1048,7 @@ static int fastrpc_internal_munmap(struct fastrpc_apps *me, 
	spin_unlock(&fdata->hlock);

bail:

	if (mapfree) {

		free_map(mapfree);

		free_map(mapfree, fdata->cid);

		kfree(mapfree);

	}

	return err;
@@ -1057,7 +1063,7 @@ static int fastrpc_internal_mmap(struct fastrpc_apps *me, 
	struct fastrpc_mmap *map = 0;

	struct smq_phy_page *pages = 0;

	void *buf;

	int len;

	unsigned long len;

	int num;

	int err = 0;
@@ -1078,9 +1084,22 @@ static int fastrpc_internal_mmap(struct fastrpc_apps *me, 
	VERIFY(err, 0 != (pages = kzalloc(num * sizeof(*pages), GFP_KERNEL)));

	if (err)

		goto bail;

	VERIFY(err, 0 < (num = buf_get_pages(buf, len, num, 1, pages, num)));



	if (me->channel[fdata->cid].smmu.enabled) {

		VERIFY(err, 0 == ion_map_iommu(clnt, map->handle,

				me->channel[fdata->cid].smmu.domain_id, 0,

				SZ_4K, 0, &map->phys, &len, 0, 0));

		if (err)

			goto bail;

		pages->addr = map->phys;

		pages->size = len;

		num = 1;

	} else {

		VERIFY(err, 0 < (num = buf_get_pages(buf, len, num, 1,

							pages, num)));

		if (err)

			goto bail;

	}



	VERIFY(err, 0 == fastrpc_mmap_on_dsp(me, mmap, pages, fdata->cid, num));

	if (err)
@@ -1094,7 +1113,7 @@ static int fastrpc_internal_mmap(struct fastrpc_apps *me, 
	spin_unlock(&fdata->hlock);

 bail:

	if (err && map) {

		free_map(map);

		free_map(map, fdata->cid);

		kfree(map);

	}

	kfree(pages);
@@ -1157,7 +1176,7 @@ static int fastrpc_device_release(struct inode *inode, struct file *file) 
		file->private_data = 0;

		hlist_for_each_entry_safe(map, n, &fdata->hlst, hn) {

			hlist_del(&map->hn);

			free_map(map);

			free_map(map, cid);

			kfree(map);

		}

		kfree(fdata);