gpu: nvgpu: Remove ELPG_FLUSH

ELPG_FLUSH is not accessible in later GPUs, so we stopped using it
and instead do explicit CBC and L2 flushes. Delete the unused
function op and backing code.

Change-Id: Ic3eb97f2d32ea8fdbe5ec57bd9254268caaf9935
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1323236
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 0 insertions, 49 deletions

diff --git a/drivers/gpu/nvgpu/gm20b/ltc_gm20b.c b/drivers/gpu/nvgpu/gm20b/ltc_gm20b.c
index 11258032..8c1be1d1 100644
--- a/drivers/gpu/nvgpu/gm20b/ltc_gm20b.c
+++ b/drivers/gpu/nvgpu/gm20b/ltc_gm20b.c
@@ -221,54 +221,6 @@ void gm20b_ltc_isr(struct gk20a *g)
         }
 }
 
-void gm20b_ltc_g_elpg_flush_locked(struct gk20a *g)
-{
-        u32 data;
-        bool done[g->ltc_count];
-        s32 retry = 100;
-        unsigned int i;
-        unsigned int num_done = 0;
-        u32 ltc_d = ltc_ltc1_ltss_g_elpg_r() - ltc_ltc0_ltss_g_elpg_r();
-
-        gk20a_dbg_fn("");
-
-        trace_gk20a_mm_g_elpg_flush_locked(dev_name(g->dev));
-
-        for (i = 0; i < g->ltc_count; i++)
-                done[i] = 0;
-
-        gk20a_writel(g, ltc_ltcs_ltss_g_elpg_r(),
-                     ltc_ltcs_ltss_g_elpg_flush_pending_f());
-        do {
-                for (i = 0; i < g->ltc_count; i++) {
-                        if (done[i])
-                                continue;
-
-                        data = gk20a_readl(g,
-                                        ltc_ltc0_ltss_g_elpg_r() + ltc_d * i);
-
-                        if (ltc_ltc0_ltss_g_elpg_flush_v(data)) {
-                                gk20a_dbg_info("g_elpg_flush 0x%x", data);
-                        } else {
-                                done[i] = 1;
-                                num_done++;
-                        }
-                }
-
-                if (num_done < g->ltc_count) {
-                        retry--;
-                        udelay(5);
-                } else
-                        break;
-        } while (retry >= 0 || !tegra_platform_is_silicon());
-
-        if (retry < 0 && tegra_platform_is_silicon())
-                gk20a_warn(dev_from_gk20a(g),
-                            "g_elpg_flush too many retries");
-
-        trace_gk20a_mm_g_elpg_flush_locked_done(dev_name(g->dev));
-}
-
 u32 gm20b_ltc_cbc_fix_config(struct gk20a *g, int base)
 {
         u32 val = gk20a_readl(g, ltc_ltcs_ltss_cbc_num_active_ltcs_r());
@@ -412,7 +364,6 @@ void gm20b_init_ltc(struct gpu_ops *gops)
         gops->ltc.init_fs_state = gm20b_ltc_init_fs_state;
         gops->ltc.init_comptags = gm20b_ltc_init_comptags;
         gops->ltc.cbc_ctrl = gm20b_ltc_cbc_ctrl;
-        gops->ltc.elpg_flush = gm20b_ltc_g_elpg_flush_locked;
         gops->ltc.isr = gm20b_ltc_isr;
         gops->ltc.cbc_fix_config = gm20b_ltc_cbc_fix_config;
         gops->ltc.flush = gm20b_flush_ltc;