diff options
Diffstat (limited to 'drivers/staging/media/atomisp/pci/hmm/hmm.c')
| -rw-r--r-- | drivers/staging/media/atomisp/pci/hmm/hmm.c | 40 |
1 files changed, 36 insertions, 4 deletions
diff --git a/drivers/staging/media/atomisp/pci/hmm/hmm.c b/drivers/staging/media/atomisp/pci/hmm/hmm.c index cd70307ffd57c7..42fef17798622f 100644 --- a/drivers/staging/media/atomisp/pci/hmm/hmm.c +++ b/drivers/staging/media/atomisp/pci/hmm/hmm.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Support for Medifield PNW Camera Imaging ISP subsystem. * @@ -193,7 +194,7 @@ int hmm_init(void) * at the beginning, to avoid hmm_alloc return 0 in the * further allocation. */ - dummy_ptr = hmm_alloc(1, HMM_BO_PRIVATE, 0, NULL, HMM_UNCACHED); + dummy_ptr = hmm_alloc(1, HMM_BO_PRIVATE, 0, NULL, 0); if (!ret) { ret = sysfs_create_group(&atomisp_dev->kobj, @@ -208,6 +209,8 @@ int hmm_init(void) void hmm_cleanup(void) { + if (!dummy_ptr) + return; sysfs_remove_group(&atomisp_dev->kobj, atomisp_attribute_group); /* free dummy memory first */ @@ -219,12 +222,16 @@ void hmm_cleanup(void) } ia_css_ptr hmm_alloc(size_t bytes, enum hmm_bo_type type, - int from_highmem, const void __user *userptr, bool cached) + int from_highmem, const void __user *userptr, + const uint16_t attrs) { unsigned int pgnr; struct hmm_buffer_object *bo; + bool cached = attrs & ATOMISP_MAP_FLAG_CACHED; int ret; + WARN_ON(attrs & ATOMISP_MAP_FLAG_CONTIGUOUS); + /* * Check if we are initialized. In the ideal world we wouldn't need * this but we can tackle it once the driver is a lot cleaner @@ -249,7 +256,7 @@ ia_css_ptr hmm_alloc(size_t bytes, enum hmm_bo_type type, goto alloc_page_err; } - /* Combind the virtual address and pages togather */ + /* Combine the virtual address and pages together */ ret = hmm_bo_bind(bo); if (ret) { dev_err(atomisp_dev, "hmm_bo_bind failed.\n"); @@ -258,6 +265,13 @@ ia_css_ptr hmm_alloc(size_t bytes, enum hmm_bo_type type, hmm_mem_stat.tol_cnt += pgnr; + if (attrs & ATOMISP_MAP_FLAG_CLEARED) + hmm_set(bo->start, 0, bytes); + + dev_dbg(atomisp_dev, + "%s: pages: 0x%08x (%ld bytes), type: %d from highmem %d, user ptr %p, cached %d\n", + __func__, bo->start, bytes, type, from_highmem, userptr, cached); + return bo->start; bind_err: @@ -272,6 +286,8 @@ void hmm_free(ia_css_ptr virt) { struct hmm_buffer_object *bo; + dev_dbg(atomisp_dev, "%s: free 0x%08x\n", __func__, virt); + WARN_ON(!virt); bo = hmm_bo_device_search_start(&bo_device, (unsigned int)virt); @@ -396,9 +412,14 @@ static int load_and_flush(ia_css_ptr virt, void *data, unsigned int bytes) /* Read function in ISP memory management */ int hmm_load(ia_css_ptr virt, void *data, unsigned int bytes) { + if (!virt) { + dev_warn(atomisp_dev, + "hmm_store: address is NULL\n"); + return -EINVAL; + } if (!data) { dev_err(atomisp_dev, - "hmm_load NULL argument\n"); + "hmm_store: data is a NULL argument\n"); return -EINVAL; } return load_and_flush(virt, data, bytes); @@ -418,6 +439,17 @@ int hmm_store(ia_css_ptr virt, const void *data, unsigned int bytes) char *src, *des; int ret; + if (!virt) { + dev_warn(atomisp_dev, + "hmm_store: address is NULL\n"); + return -EINVAL; + } + if (!data) { + dev_err(atomisp_dev, + "hmm_store: data is a NULL argument\n"); + return -EINVAL; + } + bo = hmm_bo_device_search_in_range(&bo_device, virt); ret = hmm_check_bo(bo, virt); if (ret) |