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qseecom: use of_reserved_mem_lookup to get heap base and size

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As cma_get_base and cma_get_size are not intended to be used by
leaf drivers on GKI enabled build, use of_reserved_mem_lookup to
get heap base and size.

Change-Id: I91194187c89ff8c7f7d445833afce1a4716f0ea4
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
This commit is contained in:
Zhen Kong 2020-01-24 17:33:36 -08:00
commit e0a2c2d4d5
1 changed files with 16 additions and 8 deletions
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24
drivers/misc/qseecom.c
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@ -46,6 +46,7 @@
#include <linux/cma.h>
#include <linux/of_platform.h>
#include <linux/interconnect.h>
#include <linux/of_reserved_mem.h>
#include <linux/qtee_shmbridge.h>
#define QSEECOM_DEV "qseecom"
@ -9416,7 +9417,8 @@ static int qseecom_register_heap_shmbridge(uint32_t heapid, uint64_t *handle)
phys_addr_t heap_pa = 0;
size_t heap_size = 0;
struct device *ion_dev = NULL;
struct cma *cma = NULL;
struct device_node *node = NULL;
struct reserved_mem *rmem = NULL;
uint32_t ns_vmids[] = {VMID_HLOS};
uint32_t ns_vm_perms[] = {PERM_READ | PERM_WRITE};
int ret = 0;
@ -9429,15 +9431,21 @@ static int qseecom_register_heap_shmbridge(uint32_t heapid, uint64_t *handle)
return ret;
}
cma = dev_get_cma_area(ion_dev);
if (!cma) {
pr_err("Failed to get Heap %d info\n", heapid);
return -ENODEV;
node = of_parse_phandle(ion_dev->of_node, "memory-region", 0);
if (!node) {
pr_err("unable to parse memory-region of heap %d\n", heapid);
return -EINVAL;
}
heap_pa = cma_get_base(cma);
heap_size = (size_t)cma_get_size(cma);
rmem = of_reserved_mem_lookup(node);
of_node_put(node);
if (!rmem) {
pr_err("unable to acquire memory-region of heap %d\n", heapid);
return -EINVAL;
}
heap_pa = rmem->base;
heap_size = (size_t)rmem->size;
pr_warn("get heap %d info: shmbridge created\n", heapid);
pr_debug("get heap %d info: shmbridge created\n", heapid);
return qtee_shmbridge_register(heap_pa,
heap_size, ns_vmids, ns_vm_perms, 1,
PERM_READ | PERM_WRITE, handle);