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gpu: nvgpu: nvlink: Add HAL for SW WAR

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Workaround of setting SAFE_CTR_INIT on NVLINK (WAR for Bug 1888034)
is needed only on nvlink 2.0. Add HAL to avoid running the WAR on
future chips.

Bug 2006692

Change-Id: I85fb90ea5ce7b848946f2c362e7a952787cc1261
Signed-off-by: Tejal Kudav <tkudav@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1738401
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Tejal Kudav
2018-06-03 18:26:37 +05:30
parent 118b7fb891
commit 097b42f088
4 changed files with 18 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/nvgpu/gk20a/gk20a.h
View File

@@ -1201,6 +1201,7 @@ struct gpu_ops {
int (*minion_data_ready_en)(struct gk20a *g,
unsigned long link_mask, bool sync);
void (*get_connected_link_mask)(u32 *link_mask);
void (*set_sw_war)(struct gk20a *g, u32 link_id);
/* API */
int (*link_early_init)(struct gk20a *g, unsigned long mask);
u32 (*link_get_mode)(struct gk20a *g, u32 link_id);

1
drivers/gpu/nvgpu/gv100/hal_gv100.c
View File

@@ -844,6 +844,7 @@ static const struct gpu_ops gv100_ops = {
.setup_pll = gv100_nvlink_setup_pll,
.minion_data_ready_en = gv100_nvlink_minion_data_ready_en,
.get_connected_link_mask = gv100_nvlink_get_connected_link_mask,
.set_sw_war = gv100_nvlink_set_sw_war,
/* API */
.link_early_init = gv100_nvlink_link_early_init,
.link_get_state = gv100_nvlink_link_get_state,

17
drivers/gpu/nvgpu/gv100/nvlink_gv100.c
View File

@@ -1625,15 +1625,10 @@ static int gv100_nvlink_enable_links_pre_top(struct gk20a *g, u32 links)
return -EINVAL;
}
static int gv100_nvlink_enable_links_post_top(struct gk20a *g, u32 links)
void gv100_nvlink_set_sw_war(struct gk20a *g, u32 link_id)
{
u32 link_id;
unsigned long enabled_links = (links & g->nvlink.enabled_links) &
~g->nvlink.initialized_links;
u32 reg;
for_each_set_bit(link_id, &enabled_links, 32) {
/* WAR for HW bug 1888034 */
reg = DLPL_REG_RD32(g, link_id, nvl_sl0_safe_ctrl2_tx_r());
reg = set_field(reg, nvl_sl0_safe_ctrl2_tx_ctr_init_m(),
@@ -1641,7 +1636,17 @@ static int gv100_nvlink_enable_links_post_top(struct gk20a *g, u32 links)
reg = set_field(reg, nvl_sl0_safe_ctrl2_tx_ctr_initscl_m(),
nvl_sl0_safe_ctrl2_tx_ctr_initscl_init_f());
DLPL_REG_WR32(g, link_id, nvl_sl0_safe_ctrl2_tx_r(), reg);
}
static int gv100_nvlink_enable_links_post_top(struct gk20a *g, u32 links)
{
u32 link_id;
unsigned long enabled_links = (links & g->nvlink.enabled_links) &
~g->nvlink.initialized_links;
for_each_set_bit(link_id, &enabled_links, 32) {
if (g->ops.nvlink.set_sw_war)
g->ops.nvlink.set_sw_war(g, link_id);
gv100_nvlink_initialize_tlc(g, link_id);
gv100_nvlink_initialize_nvlipt(g, link_id);
gv100_nvlink_enable_link_intr(g, link_id, true);

1
drivers/gpu/nvgpu/gv100/nvlink_gv100.h
View File

@@ -37,6 +37,7 @@ int gv100_nvlink_setup_pll(struct gk20a *g, unsigned long link_mask);
int gv100_nvlink_minion_data_ready_en(struct gk20a *g,
unsigned long link_mask, bool sync);
void gv100_nvlink_get_connected_link_mask(u32 *link_mask);
void gv100_nvlink_set_sw_war(struct gk20a *g, u32 link_id);
/* API */
int gv100_nvlink_link_early_init(struct gk20a *g, unsigned long mask);
u32 gv100_nvlink_link_get_mode(struct gk20a *g, u32 link_id);