Split the remove_mapping_information() function into find_dsp_mapping()
to locate the mapping and remove_mapping_information() to remove it.
Rename find_containing_mapping() to find_mpu_mapping() and share the
search code between find_dsp_mapping() and find_mpu_mapping().
This prepares the driver for VM_PFNMAP support.
Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
---
drivers/staging/tidspbridge/rmgr/proc.c | 116 ++++++++++++++++---------------
1 files changed, 59 insertions(+), 57 deletions(-)
diff --git a/drivers/staging/tidspbridge/rmgr/proc.c
b/drivers/staging/tidspbridge/rmgr/proc.c
index 7e4f12f..64b1bba 100644
--- a/drivers/staging/tidspbridge/rmgr/proc.c
+++ b/drivers/staging/tidspbridge/rmgr/proc.c
@@ -145,47 +145,67 @@ static struct dmm_map_object *add_mapping_info(struct
process_context *pr_ctxt,
return map_obj;
}
-static int match_exact_map_obj(struct dmm_map_object *map_obj,
- u32 dsp_addr, u32 size)
+static void remove_mapping_information(struct process_context *pr_ctxt,
+ struct dmm_map_object *map_obj)
{
- if (map_obj->dsp_addr == dsp_addr && map_obj->size != size)
- pr_err("%s: addr match (0x%x), size don't (0x%x != 0x%x)\n",
- __func__, dsp_addr, map_obj->size, size);
+ if (map_obj == NULL)
+ return;
- return map_obj->dsp_addr == dsp_addr &&
- map_obj->size == size;
+ pr_debug("%s: match, deleting map info\n", __func__);
+
+ spin_lock(&pr_ctxt->dmm_map_lock);
+ list_del(&map_obj->link);
+ spin_unlock(&pr_ctxt->dmm_map_lock);
+
+ kfree(map_obj->dma_info.sg);
+ kfree(map_obj->pages);
+ kfree(map_obj);
}
-static void remove_mapping_information(struct process_context *pr_ctxt,
- u32 dsp_addr, u32 size)
+static struct dmm_map_object *
+find_mapping(struct process_context *pr_ctxt, u32 addr, u32 size,
+ int (*match)(struct dmm_map_object *, u32, u32))
{
struct dmm_map_object *map_obj;
- pr_debug("%s: looking for virt 0x%x size 0x%x\n", __func__,
- dsp_addr, size);
-
spin_lock(&pr_ctxt->dmm_map_lock);
list_for_each_entry(map_obj, &pr_ctxt->dmm_map_list, link) {
- pr_debug("%s: candidate: mpu_addr 0x%x virt 0x%x size 0x%x\n",
- __func__,
- map_obj->mpu_addr,
- map_obj->dsp_addr,
- map_obj->size);
-
- if (match_exact_map_obj(map_obj, dsp_addr, size)) {
- pr_debug("%s: match, deleting map info\n", __func__);
- list_del(&map_obj->link);
- kfree(map_obj->dma_info.sg);
- kfree(map_obj->pages);
- kfree(map_obj);
+ pr_debug("%s: candidate: mpu_addr 0x%x dsp_addr 0x%x size
0x%x\n",
+ __func__, map_obj->mpu_addr, map_obj->dsp_addr,
+ map_obj->size);
+
+ if (match(map_obj, addr, size)) {
+ pr_debug("%s: match!\n", __func__);
goto out;
}
- pr_debug("%s: candidate didn't match\n", __func__);
+
+ pr_debug("%s: no match!\n", __func__);
}
- pr_err("%s: failed to find given map info\n", __func__);
+ map_obj = NULL;
out:
spin_unlock(&pr_ctxt->dmm_map_lock);
+ return map_obj;
+}
+
+static int match_exact_map_obj(struct dmm_map_object *map_obj,
+ u32 dsp_addr, u32 size)
+{
+ if (map_obj->dsp_addr == dsp_addr && map_obj->size != size)
+ pr_err("%s: addr match (0x%x), size don't (0x%x != 0x%x)\n",
+ __func__, dsp_addr, map_obj->size, size);
+
+ return map_obj->dsp_addr == dsp_addr &&
+ map_obj->size == size;
+}
+
+static struct dmm_map_object *
+find_dsp_mapping(struct process_context *pr_ctxt, u32 dsp_addr, u32 size)
+{
+ pr_debug("%s: looking for virt 0x%x size 0x%x\n", __func__,
+ dsp_addr, size);
+
+ return find_mapping(pr_ctxt, dsp_addr, size, match_exact_map_obj);
}
static int match_containing_map_obj(struct dmm_map_object *map_obj,
@@ -197,33 +217,13 @@ static int match_containing_map_obj(struct dmm_map_object
*map_obj,
mpu_addr + size <= map_obj_end;
}
-static struct dmm_map_object *find_containing_mapping(
- struct process_context *pr_ctxt,
- u32 mpu_addr, u32 size)
+static struct dmm_map_object *
+find_mpu_mapping(struct process_context *pr_ctxt, u32 mpu_addr, u32 size)
{
- struct dmm_map_object *map_obj;
pr_debug("%s: looking for mpu_addr 0x%x size 0x%x\n", __func__,
- mpu_addr, size);
+ mpu_addr, size);
- spin_lock(&pr_ctxt->dmm_map_lock);
- list_for_each_entry(map_obj, &pr_ctxt->dmm_map_list, link) {
- pr_debug("%s: candidate: mpu_addr 0x%x virt 0x%x size 0x%x\n",
- __func__,
- map_obj->mpu_addr,
- map_obj->dsp_addr,
- map_obj->size);
- if (match_containing_map_obj(map_obj, mpu_addr, size)) {
- pr_debug("%s: match!\n", __func__);
- goto out;
- }
-
- pr_debug("%s: no match!\n", __func__);
- }
-
- map_obj = NULL;
-out:
- spin_unlock(&pr_ctxt->dmm_map_lock);
- return map_obj;
+ return find_mapping(pr_ctxt, mpu_addr, size, match_containing_map_obj);
}
static int find_first_page_in_cache(struct dmm_map_object *map_obj,
@@ -755,9 +755,9 @@ int proc_begin_dma(void *hprocessor, void *pmpu_addr, u32
ul_size,
mutex_lock(&proc_lock);
/* find requested memory are in cached mapping information */
- map_obj = find_containing_mapping(pr_ctxt, (u32) pmpu_addr, ul_size);
+ map_obj = find_mpu_mapping(pr_ctxt, (u32) pmpu_addr, ul_size);
if (!map_obj) {
- pr_err("%s: find_containing_mapping failed\n", __func__);
+ pr_err("%s: find_mpu_mapping failed\n", __func__);
status = -EFAULT;
goto no_map;
}
@@ -795,9 +795,9 @@ int proc_end_dma(void *hprocessor, void *pmpu_addr, u32
ul_size,
mutex_lock(&proc_lock);
/* find requested memory are in cached mapping information */
- map_obj = find_containing_mapping(pr_ctxt, (u32) pmpu_addr, ul_size);
+ map_obj = find_mpu_mapping(pr_ctxt, (u32) pmpu_addr, ul_size);
if (!map_obj) {
- pr_err("%s: find_containing_mapping failed\n", __func__);
+ pr_err("%s: find_mpu_mapping failed\n", __func__);
status = -EFAULT;
goto no_map;
}
@@ -1273,7 +1273,7 @@ int proc_map(void *hprocessor, void *pmpu_addr, u32
ul_size,
u32 size_align;
int status = 0;
struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
- struct dmm_map_object *map_obj;
+ struct dmm_map_object *map_obj = NULL;
u32 tmp_addr = 0;
#ifdef CONFIG_TIDSPBRIDGE_CACHE_LINE_CHECK
@@ -1324,7 +1324,7 @@ int proc_map(void *hprocessor, void *pmpu_addr, u32
ul_size,
/* Mapped address = MSB of VA | LSB of PA */
*pp_map_addr = (void *) tmp_addr;
} else {
- remove_mapping_information(pr_ctxt, tmp_addr, size_align);
+ remove_mapping_information(pr_ctxt, map_obj);
dmm_un_map_memory(dmm_mgr, va_align, &size_align);
}
mutex_unlock(&proc_lock);
@@ -1600,6 +1600,7 @@ int proc_un_map(void *hprocessor, void *map_addr,
{
int status = 0;
struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
+ struct dmm_map_object *map_obj;
struct dmm_object *dmm_mgr;
u32 va_align;
u32 size_align;
@@ -1637,7 +1638,8 @@ int proc_un_map(void *hprocessor, void *map_addr,
* from dmm_map_list, so that mapped memory resource tracking
* remains uptodate
*/
- remove_mapping_information(pr_ctxt, (u32) map_addr, size_align);
+ map_obj = find_dsp_mapping(pr_ctxt, (u32) map_addr, size_align);
+ remove_mapping_information(pr_ctxt, map_obj);
unmap_failed:
mutex_unlock(&proc_lock);
--
1.7.8.6
--
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