The name "repc" has different meanings in different contexts.
To improve the readability, it's better to refine it to a name that
reflects what it actually represents.
Rename "repc" to "gsp_rpc_len" in the GSP message recv path. Add an
section in the doc to explain the terms.
No functional change is intended.
Signed-off-by: Zhi Wang <zhiw@xxxxxxxxxx>
---
.../gpu/drm/nouveau/nvkm/subdev/gsp/r535.c | 46 +++++++++++--------
1 file changed, 27 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c
index 1a07c0191356..f6ed51921e50 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c
@@ -104,6 +104,9 @@
* | params |
* +------------------------+
*
+ * decoders:
+ *
+ * - gsp_rpc_len: size of (GSP RPC header + payload)
*/
struct r535_gsp_msg {
@@ -133,7 +136,8 @@ r535_rpc_status_to_errno(uint32_t rpc_status)
}
static void *
-r535_gsp_msgq_wait(struct nvkm_gsp *gsp, u32 repc, u32 *prepc, int *ptime)
+r535_gsp_msgq_wait(struct nvkm_gsp *gsp, u32 gsp_rpc_len, u32 *prepc,
+ int *ptime)
{
struct r535_gsp_msg *mqe;
u32 size, rptr = *gsp->msgq.rptr;
@@ -141,7 +145,8 @@ r535_gsp_msgq_wait(struct nvkm_gsp *gsp, u32 repc, u32 *prepc, int *ptime)
u8 *msg;
u32 len;
- size = DIV_ROUND_UP(GSP_MSG_HDR_SIZE + repc, GSP_PAGE_SIZE);
+ size = DIV_ROUND_UP(GSP_MSG_HDR_SIZE + gsp_rpc_len,
+ GSP_PAGE_SIZE);
if (WARN_ON(!size || size >= gsp->msgq.cnt))
return ERR_PTR(-EINVAL);
@@ -167,21 +172,21 @@ r535_gsp_msgq_wait(struct nvkm_gsp *gsp, u32 repc, u32 *prepc, int *ptime)
return mqe->data;
}
- size = ALIGN(repc + GSP_MSG_HDR_SIZE, GSP_PAGE_SIZE);
+ size = ALIGN(gsp_rpc_len + GSP_MSG_HDR_SIZE, GSP_PAGE_SIZE);
- msg = kvmalloc(repc, GFP_KERNEL);
+ msg = kvmalloc(gsp_rpc_len, GFP_KERNEL);
if (!msg)
return ERR_PTR(-ENOMEM);
len = ((gsp->msgq.cnt - rptr) * GSP_PAGE_SIZE) - sizeof(*mqe);
- len = min_t(u32, repc, len);
+ len = min_t(u32, gsp_rpc_len, len);
memcpy(msg, mqe->data, len);
- repc -= len;
+ gsp_rpc_len -= len;
- if (repc) {
+ if (gsp_rpc_len) {
mqe = (void *)((u8 *)gsp->shm.msgq.ptr + 0x1000 + 0 * 0x1000);
- memcpy(msg + len, mqe, repc);
+ memcpy(msg + len, mqe, gsp_rpc_len);
}
rptr = (rptr + DIV_ROUND_UP(size, GSP_PAGE_SIZE)) % gsp->msgq.cnt;
@@ -192,9 +197,9 @@ r535_gsp_msgq_wait(struct nvkm_gsp *gsp, u32 repc, u32 *prepc, int *ptime)
}
static void *
-r535_gsp_msgq_recv(struct nvkm_gsp *gsp, u32 repc, int *ptime)
+r535_gsp_msgq_recv(struct nvkm_gsp *gsp, u32 gsp_rpc_len, int *ptime)
{
- return r535_gsp_msgq_wait(gsp, repc, NULL, ptime);
+ return r535_gsp_msgq_wait(gsp, gsp_rpc_len, NULL, ptime);
}
static int
@@ -317,7 +322,7 @@ r535_gsp_msg_dump(struct nvkm_gsp *gsp, struct nvfw_gsp_rpc *msg, int lvl)
}
static struct nvfw_gsp_rpc *
-r535_gsp_msg_recv(struct nvkm_gsp *gsp, int fn, u32 repc)
+r535_gsp_msg_recv(struct nvkm_gsp *gsp, int fn, u32 gsp_rpc_len)
{
struct nvkm_subdev *subdev = &gsp->subdev;
struct nvfw_gsp_rpc *msg;
@@ -342,10 +347,11 @@ r535_gsp_msg_recv(struct nvkm_gsp *gsp, int fn, u32 repc)
r535_gsp_msg_dump(gsp, msg, NV_DBG_TRACE);
if (fn && msg->function == fn) {
- if (repc) {
- if (msg->length < sizeof(*msg) + repc) {
+ if (gsp_rpc_len) {
+ if (msg->length < sizeof(*msg) + gsp_rpc_len) {
nvkm_error(subdev, "msg len %d < %zd\n",
- msg->length, sizeof(*msg) + repc);
+ msg->length, sizeof(*msg) +
+ gsp_rpc_len);
r535_gsp_msg_dump(gsp, msg, NV_DBG_ERROR);
r535_gsp_msg_done(gsp, msg);
return ERR_PTR(-EIO);
@@ -414,7 +420,8 @@ r535_gsp_rpc_poll(struct nvkm_gsp *gsp, u32 fn)
}
static void *
-r535_gsp_rpc_send(struct nvkm_gsp *gsp, void *argv, bool wait, u32 repc)
+r535_gsp_rpc_send(struct nvkm_gsp *gsp, void *argv, bool wait,
+ u32 gsp_rpc_len)
{
struct nvfw_gsp_rpc *rpc = container_of(argv, typeof(*rpc), data);
struct nvfw_gsp_rpc *msg;
@@ -434,7 +441,7 @@ r535_gsp_rpc_send(struct nvkm_gsp *gsp, void *argv, bool wait, u32 repc)
return ERR_PTR(ret);
if (wait) {
- msg = r535_gsp_msg_recv(gsp, fn, repc);
+ msg = r535_gsp_msg_recv(gsp, fn, gsp_rpc_len);
if (!IS_ERR_OR_NULL(msg))
repv = msg->data;
else
@@ -770,7 +777,8 @@ r535_gsp_rpc_get(struct nvkm_gsp *gsp, u32 fn, u32 argc)
}
static void *
-r535_gsp_rpc_push(struct nvkm_gsp *gsp, void *argv, bool wait, u32 repc)
+r535_gsp_rpc_push(struct nvkm_gsp *gsp, void *argv, bool wait,
+ u32 gsp_rpc_len)
{
struct nvfw_gsp_rpc *rpc = container_of(argv, typeof(*rpc), data);
struct r535_gsp_msg *cmd = container_of((void *)rpc, typeof(*cmd), data);
@@ -817,7 +825,7 @@ r535_gsp_rpc_push(struct nvkm_gsp *gsp, void *argv, bool wait, u32 repc)
/* Wait for reply. */
if (wait) {
- rpc = r535_gsp_msg_recv(gsp, fn, repc);
+ rpc = r535_gsp_msg_recv(gsp, fn, gsp_rpc_len);
if (!IS_ERR_OR_NULL(rpc))
repv = rpc->data;
else
@@ -826,7 +834,7 @@ r535_gsp_rpc_push(struct nvkm_gsp *gsp, void *argv, bool wait, u32 repc)
repv = NULL;
}
} else {
- repv = r535_gsp_rpc_send(gsp, argv, wait, repc);
+ repv = r535_gsp_rpc_send(gsp, argv, wait, gsp_rpc_len);
}
done:
--
2.34.1
