diff options
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/qcom/smem.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c index 7d9a43da5084..70b2ee80d6bd 100644 --- a/drivers/soc/qcom/smem.c +++ b/drivers/soc/qcom/smem.c @@ -655,6 +655,33 @@ int qcom_smem_get_free_space(unsigned host) } EXPORT_SYMBOL(qcom_smem_get_free_space); +/** + * qcom_smem_virt_to_phys() - return the physical address associated + * with an smem item pointer (previously returned by qcom_smem_get() + * @p: the virtual address to convert + * + * Returns 0 if the pointer provided is not within any smem region. + */ +phys_addr_t qcom_smem_virt_to_phys(void *p) +{ + unsigned i; + + for (i = 0; i < __smem->num_regions; i++) { + struct smem_region *region = &__smem->regions[i]; + + if (p < region->virt_base) + continue; + if (p < region->virt_base + region->size) { + u64 offset = p - region->virt_base; + + return (phys_addr_t)region->aux_base + offset; + } + } + + return 0; +} +EXPORT_SYMBOL(qcom_smem_virt_to_phys); + static int qcom_smem_get_sbl_version(struct qcom_smem *smem) { struct smem_header *header; |