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drm/amdgpu: used cached pcie gen info for SI (v2)
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Rather than querying it every time we need it.
Also fixes a crash in VM pass through if there is no
root bridge because the cached value fetch already checks
this properly.

v2: fix includes

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=105244
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Rex Zhu<rezhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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Alex Deucher committed Mar 5, 2018
1 parent a8d0fb2 commit 05656e5
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Showing 2 changed files with 23 additions and 49 deletions.
22 changes: 10 additions & 12 deletions drivers/gpu/drm/amd/amdgpu/si.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@
#include "amdgpu_uvd.h"
#include "amdgpu_vce.h"
#include "atom.h"
#include "amd_pcie.h"
#include "amdgpu_powerplay.h"
#include "sid.h"
#include "si_ih.h"
Expand Down Expand Up @@ -1461,8 +1462,8 @@ static void si_pcie_gen3_enable(struct amdgpu_device *adev)
{
struct pci_dev *root = adev->pdev->bus->self;
int bridge_pos, gpu_pos;
u32 speed_cntl, mask, current_data_rate;
int ret, i;
u32 speed_cntl, current_data_rate;
int i;
u16 tmp16;

if (pci_is_root_bus(adev->pdev->bus))
Expand All @@ -1474,23 +1475,20 @@ static void si_pcie_gen3_enable(struct amdgpu_device *adev)
if (adev->flags & AMD_IS_APU)
return;

ret = drm_pcie_get_speed_cap_mask(adev->ddev, &mask);
if (ret != 0)
return;

if (!(mask & (DRM_PCIE_SPEED_50 | DRM_PCIE_SPEED_80)))
if (!(adev->pm.pcie_gen_mask & (CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2 |
CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3)))
return;

speed_cntl = RREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL);
current_data_rate = (speed_cntl & LC_CURRENT_DATA_RATE_MASK) >>
LC_CURRENT_DATA_RATE_SHIFT;
if (mask & DRM_PCIE_SPEED_80) {
if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3) {
if (current_data_rate == 2) {
DRM_INFO("PCIE gen 3 link speeds already enabled\n");
return;
}
DRM_INFO("enabling PCIE gen 3 link speeds, disable with amdgpu.pcie_gen2=0\n");
} else if (mask & DRM_PCIE_SPEED_50) {
} else if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2) {
if (current_data_rate == 1) {
DRM_INFO("PCIE gen 2 link speeds already enabled\n");
return;
Expand All @@ -1506,7 +1504,7 @@ static void si_pcie_gen3_enable(struct amdgpu_device *adev)
if (!gpu_pos)
return;

if (mask & DRM_PCIE_SPEED_80) {
if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3) {
if (current_data_rate != 2) {
u16 bridge_cfg, gpu_cfg;
u16 bridge_cfg2, gpu_cfg2;
Expand Down Expand Up @@ -1589,9 +1587,9 @@ static void si_pcie_gen3_enable(struct amdgpu_device *adev)

pci_read_config_word(adev->pdev, gpu_pos + PCI_EXP_LNKCTL2, &tmp16);
tmp16 &= ~0xf;
if (mask & DRM_PCIE_SPEED_80)
if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3)
tmp16 |= 3;
else if (mask & DRM_PCIE_SPEED_50)
else if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2)
tmp16 |= 2;
else
tmp16 |= 1;
Expand Down
50 changes: 13 additions & 37 deletions drivers/gpu/drm/amd/amdgpu/si_dpm.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@
#include "amdgpu_pm.h"
#include "amdgpu_dpm.h"
#include "amdgpu_atombios.h"
#include "amd_pcie.h"
#include "sid.h"
#include "r600_dpm.h"
#include "si_dpm.h"
Expand Down Expand Up @@ -3331,29 +3332,6 @@ static void btc_apply_voltage_delta_rules(struct amdgpu_device *adev,
}
}

static enum amdgpu_pcie_gen r600_get_pcie_gen_support(struct amdgpu_device *adev,
u32 sys_mask,
enum amdgpu_pcie_gen asic_gen,
enum amdgpu_pcie_gen default_gen)
{
switch (asic_gen) {
case AMDGPU_PCIE_GEN1:
return AMDGPU_PCIE_GEN1;
case AMDGPU_PCIE_GEN2:
return AMDGPU_PCIE_GEN2;
case AMDGPU_PCIE_GEN3:
return AMDGPU_PCIE_GEN3;
default:
if ((sys_mask & DRM_PCIE_SPEED_80) && (default_gen == AMDGPU_PCIE_GEN3))
return AMDGPU_PCIE_GEN3;
else if ((sys_mask & DRM_PCIE_SPEED_50) && (default_gen == AMDGPU_PCIE_GEN2))
return AMDGPU_PCIE_GEN2;
else
return AMDGPU_PCIE_GEN1;
}
return AMDGPU_PCIE_GEN1;
}

static void r600_calculate_u_and_p(u32 i, u32 r_c, u32 p_b,
u32 *p, u32 *u)
{
Expand Down Expand Up @@ -5028,10 +5006,11 @@ static int si_populate_smc_acpi_state(struct amdgpu_device *adev,
table->ACPIState.levels[0].vddc.index,
&table->ACPIState.levels[0].std_vddc);
}
table->ACPIState.levels[0].gen2PCIE = (u8)r600_get_pcie_gen_support(adev,
si_pi->sys_pcie_mask,
si_pi->boot_pcie_gen,
AMDGPU_PCIE_GEN1);
table->ACPIState.levels[0].gen2PCIE =
(u8)amdgpu_get_pcie_gen_support(adev,
si_pi->sys_pcie_mask,
si_pi->boot_pcie_gen,
AMDGPU_PCIE_GEN1);

if (si_pi->vddc_phase_shed_control)
si_populate_phase_shedding_value(adev,
Expand Down Expand Up @@ -7168,10 +7147,10 @@ static void si_parse_pplib_clock_info(struct amdgpu_device *adev,
pl->vddc = le16_to_cpu(clock_info->si.usVDDC);
pl->vddci = le16_to_cpu(clock_info->si.usVDDCI);
pl->flags = le32_to_cpu(clock_info->si.ulFlags);
pl->pcie_gen = r600_get_pcie_gen_support(adev,
si_pi->sys_pcie_mask,
si_pi->boot_pcie_gen,
clock_info->si.ucPCIEGen);
pl->pcie_gen = amdgpu_get_pcie_gen_support(adev,
si_pi->sys_pcie_mask,
si_pi->boot_pcie_gen,
clock_info->si.ucPCIEGen);

/* patch up vddc if necessary */
ret = si_get_leakage_voltage_from_leakage_index(adev, pl->vddc,
Expand Down Expand Up @@ -7326,7 +7305,6 @@ static int si_dpm_init(struct amdgpu_device *adev)
struct si_power_info *si_pi;
struct atom_clock_dividers dividers;
int ret;
u32 mask;

si_pi = kzalloc(sizeof(struct si_power_info), GFP_KERNEL);
if (si_pi == NULL)
Expand All @@ -7336,11 +7314,9 @@ static int si_dpm_init(struct amdgpu_device *adev)
eg_pi = &ni_pi->eg;
pi = &eg_pi->rv7xx;

ret = drm_pcie_get_speed_cap_mask(adev->ddev, &mask);
if (ret)
si_pi->sys_pcie_mask = 0;
else
si_pi->sys_pcie_mask = mask;
si_pi->sys_pcie_mask =
(adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_MASK) >>
CAIL_PCIE_LINK_SPEED_SUPPORT_SHIFT;
si_pi->force_pcie_gen = AMDGPU_PCIE_GEN_INVALID;
si_pi->boot_pcie_gen = si_get_current_pcie_speed(adev);

Expand Down

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