This reverts commit fc156629b23a21181e473e60341e3a78af25a1d4.
The memory region allocated using dma_alloc_attr with no kernel mapping
attribute set would still be a part of the linear kernel map. Hence as a
precursor to using reserved memory for modem metadata region, revert back
to the simpler way of dynamic memory allocation.
Suggested-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Signed-off-by: Sibi Sankar <quic_sibis@xxxxxxxxxxx>
---
drivers/remoteproc/qcom_q6v5_mss.c | 38 +++++-------------------------
1 file changed, 6 insertions(+), 32 deletions(-)
diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index 2f4027664a0e..e2f765f87ec9 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -10,7 +10,6 @@
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/devcoredump.h>
-#include <linux/dma-map-ops.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
@@ -961,52 +960,27 @@ static void q6v5proc_halt_axi_port(struct q6v5 *qproc,
static int q6v5_mpss_init_image(struct q6v5 *qproc, const struct firmware *fw,
const char *fw_name)
{
- unsigned long dma_attrs = DMA_ATTR_FORCE_CONTIGUOUS | DMA_ATTR_NO_KERNEL_MAPPING;
- unsigned long flags = VM_DMA_COHERENT | VM_FLUSH_RESET_PERMS;
- struct page **pages;
- struct page *page;
+ unsigned long dma_attrs = DMA_ATTR_FORCE_CONTIGUOUS;
dma_addr_t phys;
void *metadata;
int mdata_perm;
int xferop_ret;
size_t size;
- void *vaddr;
- int count;
+ void *ptr;
int ret;
- int i;
metadata = qcom_mdt_read_metadata(fw, &size, fw_name, qproc->dev);
if (IS_ERR(metadata))
return PTR_ERR(metadata);
- page = dma_alloc_attrs(qproc->dev, size, &phys, GFP_KERNEL, dma_attrs);
- if (!page) {
+ ptr = dma_alloc_attrs(qproc->dev, size, &phys, GFP_KERNEL, dma_attrs);
+ if (!ptr) {
kfree(metadata);
dev_err(qproc->dev, "failed to allocate mdt buffer\n");
return -ENOMEM;
}
- count = PAGE_ALIGN(size) >> PAGE_SHIFT;
- pages = kmalloc_array(count, sizeof(struct page *), GFP_KERNEL);
- if (!pages) {
- ret = -ENOMEM;
- goto free_dma_attrs;
- }
-
- for (i = 0; i < count; i++)
- pages[i] = nth_page(page, i);
-
- vaddr = vmap(pages, count, flags, pgprot_dmacoherent(PAGE_KERNEL));
- kfree(pages);
- if (!vaddr) {
- dev_err(qproc->dev, "unable to map memory region: %pa+%zx\n", &phys, size);
- ret = -EBUSY;
- goto free_dma_attrs;
- }
-
- memcpy(vaddr, metadata, size);
-
- vunmap(vaddr);
+ memcpy(ptr, metadata, size);
/* Hypervisor mapping to access metadata by modem */
mdata_perm = BIT(QCOM_SCM_VMID_HLOS);
@@ -1036,7 +1010,7 @@ static int q6v5_mpss_init_image(struct q6v5 *qproc, const struct firmware *fw,
"mdt buffer not reclaimed system may become unstable\n");
free_dma_attrs:
- dma_free_attrs(qproc->dev, size, page, phys, dma_attrs);
+ dma_free_attrs(qproc->dev, size, ptr, phys, dma_attrs);
kfree(metadata);
return ret < 0 ? ret : 0;
--
2.17.1
