From e3ae03e17abd452c157545234348692364b4b9f6 Mon Sep 17 00:00:00 2001 From: Terje Bergstrom Date: Wed, 12 Sep 2018 14:51:40 -0700 Subject: gpu: nvgpu: Add MC APIs for reset masks Add API for querying reset mask corresponding to a unit. The reset masks need to be read from MC HW header, and we do not want all units to access Mc HW headers themselves. JIRA NVGPU-954 Change-Id: I49ebbd891569de634bfc71afcecc8cd2358805c0 Signed-off-by: Terje Bergstrom Reviewed-on: https://git-master.nvidia.com/r/1823384 Reviewed-by: mobile promotions Tested-by: mobile promotions --- drivers/gpu/nvgpu/common/mc/mc_gm20b.c | 49 ++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) (limited to 'drivers/gpu/nvgpu/common/mc/mc_gm20b.c') diff --git a/drivers/gpu/nvgpu/common/mc/mc_gm20b.c b/drivers/gpu/nvgpu/common/mc/mc_gm20b.c index c4e682ec..1194be85 100644 --- a/drivers/gpu/nvgpu/common/mc/mc_gm20b.c +++ b/drivers/gpu/nvgpu/common/mc/mc_gm20b.c @@ -28,6 +28,7 @@ #include #include #include +#include #include "mc_gm20b.h" @@ -292,3 +293,51 @@ void gm20b_mc_log_pending_intrs(struct gk20a *g) } } +u32 gm20b_mc_reset_mask(struct gk20a *g, enum nvgpu_unit unit) +{ + u32 mask = 0; + + switch(unit) { + case NVGPU_UNIT_FIFO: + mask = mc_enable_pfifo_enabled_f(); + break; + case NVGPU_UNIT_PERFMON: + mask = mc_enable_perfmon_enabled_f(); + break; + case NVGPU_UNIT_GRAPH: + mask = mc_enable_pgraph_enabled_f(); + break; + case NVGPU_UNIT_BLG: + mask = mc_enable_blg_enabled_f(); + break; + case NVGPU_UNIT_PWR: + mask = mc_enable_pwr_enabled_f(); + break; + default: + nvgpu_err(g, "unknown reset unit %d", unit); + BUG(); + break; + } + + return mask; +} + +bool gm20b_mc_is_enabled(struct gk20a *g, enum nvgpu_unit unit) +{ + u32 mask = g->ops.mc.reset_mask(g, unit); + + return (nvgpu_readl(g, mc_enable_r()) & mask) != 0U; +} + +void gm20b_mc_fb_reset(struct gk20a *g) +{ + u32 val; + + nvgpu_log_info(g, "reset gk20a fb"); + + val = gk20a_readl(g, mc_elpg_enable_r()); + val |= mc_elpg_enable_xbar_enabled_f() + | mc_elpg_enable_pfb_enabled_f() + | mc_elpg_enable_hub_enabled_f(); + gk20a_writel(g, mc_elpg_enable_r(), val); +} -- cgit v1.2.2