gpu: nvgpu: gv11b: add max_subctx_count to g->fifo.t19x

- For better performance. It used to read register every time referencing
  max_subctx_count.
- Avoid reading registers for vgpu.

Jira VFND-3797

Change-Id: Id6e6b15a0d9a035795e8a9a2c6bb63524c5eb544
Signed-off-by: Richard Zhao <rizhao@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1537009
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 2 insertions, 11 deletions

diff --git a/drivers/gpu/nvgpu/gv11b/subctx_gv11b.c b/drivers/gpu/nvgpu/gv11b/subctx_gv11b.c
index 72a66530..4f64843c 100644
--- a/drivers/gpu/nvgpu/gv11b/subctx_gv11b.c
+++ b/drivers/gpu/nvgpu/gv11b/subctx_gv11b.c
@@ -26,7 +26,6 @@
 
 #include <nvgpu/hw/gv11b/hw_ram_gv11b.h>
 #include <nvgpu/hw/gv11b/hw_ctxsw_prog_gv11b.h>
-#include <nvgpu/hw/gv11b/hw_gr_gv11b.h>
 
 static void gv11b_init_subcontext_pdb(struct channel_gk20a *c,
                                 struct nvgpu_mem *inst_block);
@@ -143,6 +142,7 @@ void gv11b_subctx_commit_pdb(struct channel_gk20a *c,
                                 struct nvgpu_mem *inst_block)
 {
         struct gk20a *g = c->g;
+        struct fifo_gk20a *f = &g->fifo;
         struct vm_gk20a *vm = c->vm;
         u32 lo, hi;
         u32 subctx_id = 0;
@@ -164,19 +164,10 @@ void gv11b_subctx_commit_pdb(struct channel_gk20a *c,
                 ram_in_sc_page_dir_base_lo_0_f(pdb_addr_lo);
         nvgpu_log(g, gpu_dbg_info, " pdb info lo %x hi %x",
                                         format_word, pdb_addr_hi);
-        for (subctx_id = 0; subctx_id < gv11b_get_max_subctx_count(g);
-                                                        subctx_id++) {
+        for (subctx_id = 0; subctx_id < f->t19x.max_subctx_count; subctx_id++) {
                 lo = ram_in_sc_page_dir_base_vol_0_w() + (4 * subctx_id);
                 hi = ram_in_sc_page_dir_base_hi_0_w() + (4 * subctx_id);
                 nvgpu_mem_wr32(g, inst_block, lo, format_word);
                 nvgpu_mem_wr32(g, inst_block, hi, pdb_addr_hi);
         }
 }
-
-
-u32 gv11b_get_max_subctx_count(struct gk20a *g)
-{
-        u32 data = gk20a_readl(g, gr_pri_fe_chip_def_info_r());
-
-        return gr_pri_fe_chip_def_info_max_veid_count_v(data);
-}