Commit 05656e5e authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/amdgpu: used cached pcie gen info for SI (v2) 

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: default avatarChristian König <christian.koenig@amd.com>
Reviewed-by: default avatarRex <Zhu&lt;rezhu@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
parent a8d0fb2f

drivers/gpu/drm/amd/amdgpu/si.c

+10 −12
Original line number Diff line number Diff line
@@ -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"
@@ -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))
@@ -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;
@@ -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;
@@ -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;

drivers/gpu/drm/amd/amdgpu/si_dpm.c

+13 −37
Original line number Diff line number Diff line
@@ -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"
@@ -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)

{
@@ -5028,7 +5006,8 @@ 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,

		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);
@@ -7168,7 +7147,7 @@ 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,

	pl->pcie_gen = amdgpu_get_pcie_gen_support(adev,

						   si_pi->sys_pcie_mask,

						   si_pi->boot_pcie_gen,

						   clock_info->si.ucPCIEGen);
@@ -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)
@@ -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);

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