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gpu: nvgpu: Use TPC_PG_MASK to powergate the TPC

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- 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 <dsinghatwari@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2159219
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Divya Singhatwaria
2019-07-23 10:43:35 +05:30
committed by mobile promotions
parent 47f6bc0c2e
commit ae175e45ed
14 changed files with 176 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/gpu/nvgpu/os/linux/sysfs.c
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@@ -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 {