Every time the MM application calls proc_map to map
a memory area, remember the details of that mapping,
together with the related page structures.
Whenever a buffer is unmapped, clean up the mapping
information resources.
This information is maintained as part of the
DMM resource tracking mechanism.
Signed-off-by: Ohad Ben-Cohen <o...@wizery.com>
---
If you want, you can also reach me at < ohadb at ti dot com >.
arch/arm/plat-omap/include/dspbridge/dspdefs.h | 3 +-
drivers/dsp/bridge/core/io_sm.c | 11 ++-
drivers/dsp/bridge/core/tiomap3430.c | 9 ++-
drivers/dsp/bridge/rmgr/proc.c | 125 ++++++++++++++++++------
4 files changed, 113 insertions(+), 35 deletions(-)
diff --git a/arch/arm/plat-omap/include/dspbridge/dspdefs.h
b/arch/arm/plat-omap/include/dspbridge/dspdefs.h
index 3dfe406..f09bdbd 100644
--- a/arch/arm/plat-omap/include/dspbridge/dspdefs.h
+++ b/arch/arm/plat-omap/include/dspbridge/dspdefs.h
@@ -182,7 +182,8 @@ typedef dsp_status(*fxn_brd_memwrite) (struct
bridge_dev_context
typedef dsp_status(*fxn_brd_memmap) (struct bridge_dev_context
* hDevContext, u32 ul_mpu_addr,
u32 ulVirtAddr, u32 ul_num_bytes,
- u32 ulMapAttrs);
+ u32 ulMapAttrs,
+ struct page **mapped_pages);
/*
* ======== bridge_brd_mem_un_map ========
diff --git a/drivers/dsp/bridge/core/io_sm.c b/drivers/dsp/bridge/core/io_sm.c
index d6c1a98..7fda364 100644
--- a/drivers/dsp/bridge/core/io_sm.c
+++ b/drivers/dsp/bridge/core/io_sm.c
@@ -503,7 +503,8 @@ dsp_status bridge_io_on_loaded(struct io_mgr *hio_mgr)
hio_mgr->intf_fxns->
pfn_brd_mem_map(hio_mgr->hbridge_context,
pa_curr, va_curr,
- page_size[i], map_attrs);
+ page_size[i], map_attrs,
+ NULL);
if (DSP_FAILED(status))
goto func_end;
pa_curr += page_size[i];
@@ -568,7 +569,8 @@ dsp_status bridge_io_on_loaded(struct io_mgr *hio_mgr)
hio_mgr->intf_fxns->
pfn_brd_mem_map(hio_mgr->hbridge_context,
pa_curr, va_curr,
- page_size[i], map_attrs);
+ page_size[i], map_attrs,
+ NULL);
dev_dbg(bridge,
"shm MMU PTE entry PA %x"
" VA %x DSP_VA %x Size %x\n",
@@ -636,7 +638,8 @@ dsp_status bridge_io_on_loaded(struct io_mgr *hio_mgr)
hio_mgr->ext_proc_info.ty_tlb[i].
ul_gpp_phys,
hio_mgr->ext_proc_info.ty_tlb[i].
- ul_dsp_virt, 0x100000, map_attrs);
+ ul_dsp_virt, 0x100000, map_attrs,
+ NULL);
}
}
if (DSP_FAILED(status))
@@ -655,7 +658,7 @@ dsp_status bridge_io_on_loaded(struct io_mgr *hio_mgr)
status = hio_mgr->intf_fxns->pfn_brd_mem_map
(hio_mgr->hbridge_context, l4_peripheral_table[i].phys_addr,
l4_peripheral_table[i].dsp_virt_addr, HW_PAGE_SIZE4KB,
- map_attrs);
+ map_attrs, NULL);
if (DSP_FAILED(status))
goto func_end;
i++;
diff --git a/drivers/dsp/bridge/core/tiomap3430.c
b/drivers/dsp/bridge/core/tiomap3430.c
index c7b0d83..79d42ad 100644
--- a/drivers/dsp/bridge/core/tiomap3430.c
+++ b/drivers/dsp/bridge/core/tiomap3430.c
@@ -101,7 +101,8 @@ static dsp_status bridge_brd_mem_write(struct
bridge_dev_context *dev_context,
u32 ul_num_bytes, u32 ulMemType);
static dsp_status bridge_brd_mem_map(struct bridge_dev_context *hDevContext,
u32 ul_mpu_addr, u32 ulVirtAddr,
- u32 ul_num_bytes, u32 ul_map_attr);
+ u32 ul_num_bytes, u32 ul_map_attr,
+ struct page **mapped_pages);
static dsp_status bridge_brd_mem_un_map(struct bridge_dev_context *hDevContext,
u32 ulVirtAddr, u32 ul_num_bytes);
static dsp_status bridge_dev_create(OUT struct bridge_dev_context
@@ -1208,7 +1209,8 @@ static dsp_status bridge_brd_mem_write(struct
bridge_dev_context *hDevContext,
*/
static dsp_status bridge_brd_mem_map(struct bridge_dev_context *hDevContext,
u32 ul_mpu_addr, u32 ulVirtAddr,
- u32 ul_num_bytes, u32 ul_map_attr)
+ u32 ul_num_bytes, u32 ul_map_attr,
+ struct page **mapped_pages)
{
u32 attrs;
dsp_status status = DSP_SOK;
@@ -1376,6 +1378,9 @@ static dsp_status bridge_brd_mem_map(struct
bridge_dev_context *hDevContext,
if (DSP_FAILED(status))
break;
+ if (mapped_pages)
+ mapped_pages[pg_i] = mapped_page;
+
va += HW_PAGE_SIZE4KB;
ul_mpu_addr += HW_PAGE_SIZE4KB;
} else {
diff --git a/drivers/dsp/bridge/rmgr/proc.c b/drivers/dsp/bridge/rmgr/proc.c
index 7dc9b5c..37258c4 100644
--- a/drivers/dsp/bridge/rmgr/proc.c
+++ b/drivers/dsp/bridge/rmgr/proc.c
@@ -108,6 +108,87 @@ static s32 get_envp_count(char **envp);
static char **prepend_envp(char **new_envp, char **envp, s32 envp_elems,
s32 cnew_envp, char *szVar);
+/* remember mapping information */
+static struct dmm_map_object *add_mapping_info(struct process_context *pr_ctxt,
+ u32 mpu_addr, u32 dsp_addr, u32 size)
+{
+ struct dmm_map_object *map_obj;
+
+ u32 num_usr_pgs = size / PG_SIZE4K;
+
+ pr_debug("%s: adding map info: mpu_addr 0x%x virt 0x%x size 0x%x\n",
+ __func__, mpu_addr,
+ dsp_addr, size);
+
+ map_obj = kzalloc(sizeof(struct dmm_map_object), GFP_KERNEL);
+ if (!map_obj) {
+ pr_err("%s: kzalloc failed\n", __func__);
+ return NULL;
+ }
+ INIT_LIST_HEAD(&map_obj->link);
+
+ map_obj->pages = kcalloc(num_usr_pgs, sizeof(struct page *),
+ GFP_KERNEL);
+ if (!map_obj->pages) {
+ pr_err("%s: kzalloc failed\n", __func__);
+ kfree(map_obj);
+ return NULL;
+ }
+
+ map_obj->mpu_addr = mpu_addr;
+ map_obj->dsp_addr = dsp_addr;
+ map_obj->size = size;
+ map_obj->num_usr_pgs = num_usr_pgs;
+
+ spin_lock(&pr_ctxt->dmm_map_lock);
+ list_add(&map_obj->link, &pr_ctxt->dmm_map_list);
+ 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 void remove_mapping_information(struct process_context *pr_ctxt,
+ u32 dsp_addr, u32 size)
+{
+ 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->pages);
+ kfree(map_obj);
+ goto out;
+ }
+ pr_debug("%s: candidate didn't match\n", __func__);
+ }
+
+ pr_err("%s: failed to find given map info\n", __func__);
+out:
+ spin_unlock(&pr_ctxt->dmm_map_lock);
+}
+
/*
* ======== proc_attach ========
* Purpose:
@@ -1074,6 +1155,7 @@ dsp_status proc_map(void *hprocessor, void *pmpu_addr,
u32 ul_size,
dsp_status status = DSP_SOK;
struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
struct dmm_map_object *map_obj;
+ u32 tmp_addr = 0;
#ifdef CONFIG_BRIDGE_CACHE_LINE_CHECK
if ((ul_map_attr & BUFMODE_MASK) != RBUF) {
@@ -1105,15 +1187,23 @@ dsp_status proc_map(void *hprocessor, void *pmpu_addr,
u32 ul_size,
/* Add mapping to the page tables. */
if (DSP_SUCCEEDED(status)) {
- status = (*p_proc_object->intf_fxns->pfn_brd_mem_map)
- (p_proc_object->hbridge_context, pa_align, va_align,
- size_align, ul_map_attr);
+ /* Mapped address = MSB of VA | LSB of PA */
+ tmp_addr = (va_align | ((u32) pmpu_addr & (PG_SIZE4K - 1)));
+ /* mapped memory resource tracking */
+ map_obj = add_mapping_info(pr_ctxt, pa_align, tmp_addr,
+ size_align);
+ if (!map_obj)
+ status = -ENOMEM;
+ else
+ status = (*p_proc_object->intf_fxns->pfn_brd_mem_map)
+ (p_proc_object->hbridge_context, pa_align, va_align,
+ size_align, ul_map_attr, map_obj->pages);
}
if (DSP_SUCCEEDED(status)) {
/* Mapped address = MSB of VA | LSB of PA */
- *pp_map_addr = (void *)(va_align | ((u32) pmpu_addr &
- (PG_SIZE4K - 1)));
+ *pp_map_addr = (void *) tmp_addr;
} else {
+ remove_mapping_information(pr_ctxt, tmp_addr, size_align);
dmm_un_map_memory(dmm_mgr, va_align, &size_align);
}
mutex_unlock(&proc_lock);
@@ -1121,19 +1211,6 @@ dsp_status proc_map(void *hprocessor, void *pmpu_addr,
u32 ul_size,
if (DSP_FAILED(status))
goto func_end;
- /*
- * A successful map should be followed by insertion of map_obj
- * into dmm_map_list, so that mapped memory resource tracking
- * remains uptodate
- */
- map_obj = kmalloc(sizeof(struct dmm_map_object), GFP_KERNEL);
- if (map_obj) {
- map_obj->dsp_addr = (u32) *pp_map_addr;
- spin_lock(&pr_ctxt->dmm_map_lock);
- list_add(&map_obj->link, &pr_ctxt->dmm_map_list);
- spin_unlock(&pr_ctxt->dmm_map_lock);
- }
-
func_end:
dev_dbg(bridge, "%s: hprocessor %p, pmpu_addr %p, ul_size %x, "
"req_addr %p, ul_map_attr %x, pp_map_addr %p, va_align %x, "
@@ -1422,7 +1499,6 @@ dsp_status proc_un_map(void *hprocessor, void *map_addr,
struct dmm_object *dmm_mgr;
u32 va_align;
u32 size_align;
- struct dmm_map_object *map_obj;
va_align = PG_ALIGN_LOW((u32) map_addr, PG_SIZE4K);
if (!p_proc_object) {
@@ -1446,6 +1522,7 @@ dsp_status proc_un_map(void *hprocessor, void *map_addr,
status = (*p_proc_object->intf_fxns->pfn_brd_mem_un_map)
(p_proc_object->hbridge_context, va_align, size_align);
}
+
mutex_unlock(&proc_lock);
if (DSP_FAILED(status))
goto func_end;
@@ -1455,15 +1532,7 @@ dsp_status proc_un_map(void *hprocessor, void *map_addr,
* from dmm_map_list, so that mapped memory resource tracking
* remains uptodate
*/
- spin_lock(&pr_ctxt->dmm_map_lock);
- list_for_each_entry(map_obj, &pr_ctxt->dmm_map_list, link) {
- if (map_obj->dsp_addr == (u32) map_addr) {
- list_del(&map_obj->link);
- kfree(map_obj);
- break;
- }
- }
- spin_unlock(&pr_ctxt->dmm_map_lock);
+ remove_mapping_information(pr_ctxt, (u32) map_addr, size_align);
func_end:
dev_dbg(bridge, "%s: hprocessor: 0x%p map_addr: 0x%p status: 0x%x\n",
--
1.7.0.4
--
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