From ae175e45edc5807131dfb1b63d3e4795e96a3f86 Mon Sep 17 00:00:00 2001 From: Divya Singhatwaria Date: Tue, 23 Jul 2019 10:43:35 +0530 Subject: gpu: nvgpu: Use TPC_PG_MASK to powergate the TPC - In GV11B, read fuse_status_opt_tpc_gpc register to read which TPCs are floorswept. - The driver will also read sysfs node: tpc_pg_mask - Based on these two values "can_tpc_powergate" will be set to true or false and mask will be used to write to fuse_ctrl_opt_tpc_gpc register to powergate the TPC. - can_tpc_powergate = true indicates that the mask value sent from userspace is valid and can be used to power gate the desired TPC - can_tpc_powergate = false indicates that the mask value sent from userspace is not valid and cannot be used to power gate the desired TPC. Bug 200532639 Change-Id: Ib0806e4c96305a13b3574e8063ad8e16770aa7cd Signed-off-by: Divya Singhatwaria Reviewed-on: https://git-master.nvidia.com/r/2159219 Reviewed-by: mobile promotions Tested-by: mobile promotions --- drivers/gpu/nvgpu/os/linux/sysfs.c | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) (limited to 'drivers/gpu/nvgpu/os/linux/sysfs.c') diff --git a/drivers/gpu/nvgpu/os/linux/sysfs.c b/drivers/gpu/nvgpu/os/linux/sysfs.c index 759c12e8..2ab29649 100644 --- a/drivers/gpu/nvgpu/os/linux/sysfs.c +++ b/drivers/gpu/nvgpu/os/linux/sysfs.c @@ -788,26 +788,28 @@ static ssize_t force_idle_read(struct device *dev, static DEVICE_ATTR(force_idle, ROOTRW, force_idle_read, force_idle_store); #endif -static ssize_t tpc_pg_mask_read(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct gk20a *g = get_gk20a(dev); - - return snprintf(buf, PAGE_SIZE, "%d\n", g->tpc_pg_mask); -} - static bool is_tpc_mask_valid(struct gk20a *g, u32 tpc_mask) { u32 i; bool valid = false; for (i = 0; i < MAX_TPC_PG_CONFIGS; i++) { - if (tpc_mask == g->valid_tpc_mask[i]) + if (tpc_mask == g->valid_tpc_mask[i]) { valid = true; + break; + } } return valid; } +static ssize_t tpc_pg_mask_read(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct gk20a *g = get_gk20a(dev); + + return snprintf(buf, PAGE_SIZE, "%d\n", g->tpc_pg_mask); +} + static ssize_t tpc_pg_mask_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { @@ -817,11 +819,6 @@ static ssize_t tpc_pg_mask_store(struct device *dev, nvgpu_mutex_acquire(&g->tpc_pg_lock); - if (!g->can_tpc_powergate) { - nvgpu_info(g, "TPC-PG not enabled for the platform"); - goto exit; - } - if (kstrtoul(buf, 10, &val) < 0) { nvgpu_err(g, "invalid value"); nvgpu_mutex_release(&g->tpc_pg_lock); @@ -839,6 +836,9 @@ static ssize_t tpc_pg_mask_store(struct device *dev, return -ENODEV; } + /* checking that the value from userspace is within + * the possible valid TPC configurations. + */ if (is_tpc_mask_valid(g, (u32)val)) { g->tpc_pg_mask = val; } else { -- cgit v1.2.2