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drm/amdgpu: Fix pci platform speed and width

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The new Vega series GPU cards have in-built bridges. To get the pcie
speed and width supported by the platform walk the hierarchy and get the
slowest link.

Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harish Kasiviswanathan 2019-02-01 17:57:48 -05:00 committed by Alex Deucher
parent 2c850b7b9e
commit c53134577c
1 changed files with 46 additions and 12 deletions
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58
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@ -3618,6 +3618,38 @@ retry: /* Rest of adevs pre asic reset from XGMI hive. */
return r;
}
static void amdgpu_device_get_min_pci_speed_width(struct amdgpu_device *adev,
enum pci_bus_speed *speed,
enum pcie_link_width *width)
{
struct pci_dev *pdev = adev->pdev;
enum pci_bus_speed cur_speed;
enum pcie_link_width cur_width;
*speed = PCI_SPEED_UNKNOWN;
*width = PCIE_LNK_WIDTH_UNKNOWN;
while (pdev) {
cur_speed = pcie_get_speed_cap(pdev);
cur_width = pcie_get_width_cap(pdev);
if (cur_speed != PCI_SPEED_UNKNOWN) {
if (*speed == PCI_SPEED_UNKNOWN)
*speed = cur_speed;
else if (cur_speed < *speed)
*speed = cur_speed;
}
if (cur_width != PCIE_LNK_WIDTH_UNKNOWN) {
if (*width == PCIE_LNK_WIDTH_UNKNOWN)
*width = cur_width;
else if (cur_width < *width)
*width = cur_width;
}
pdev = pci_upstream_bridge(pdev);
}
}
/**
* amdgpu_device_get_pcie_info - fence pcie info about the PCIE slot
*
@ -3630,8 +3662,8 @@ retry: /* Rest of adevs pre asic reset from XGMI hive. */
static void amdgpu_device_get_pcie_info(struct amdgpu_device *adev)
{
struct pci_dev *pdev;
enum pci_bus_speed speed_cap;
enum pcie_link_width link_width;
enum pci_bus_speed speed_cap, platform_speed_cap;
enum pcie_link_width platform_link_width;
if (amdgpu_pcie_gen_cap)
adev->pm.pcie_gen_mask = amdgpu_pcie_gen_cap;
@ -3648,6 +3680,12 @@ static void amdgpu_device_get_pcie_info(struct amdgpu_device *adev)
return;
}
if (adev->pm.pcie_gen_mask && adev->pm.pcie_mlw_mask)
return;
amdgpu_device_get_min_pci_speed_width(adev, &platform_speed_cap,
&platform_link_width);
if (adev->pm.pcie_gen_mask == 0) {
/* asic caps */
pdev = adev->pdev;
@ -3673,22 +3711,20 @@ static void amdgpu_device_get_pcie_info(struct amdgpu_device *adev)
adev->pm.pcie_gen_mask |= CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN1;
}
/* platform caps */
pdev = adev->ddev->pdev->bus->self;
speed_cap = pcie_get_speed_cap(pdev);
if (speed_cap == PCI_SPEED_UNKNOWN) {
if (platform_speed_cap == PCI_SPEED_UNKNOWN) {
adev->pm.pcie_gen_mask |= (CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1 |
CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2);
} else {
if (speed_cap == PCIE_SPEED_16_0GT)
if (platform_speed_cap == PCIE_SPEED_16_0GT)
adev->pm.pcie_gen_mask |= (CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1 |
CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2 |
CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3 |
CAIL_PCIE_LINK_SPEED_SUPPORT_GEN4);
else if (speed_cap == PCIE_SPEED_8_0GT)
else if (platform_speed_cap == PCIE_SPEED_8_0GT)
adev->pm.pcie_gen_mask |= (CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1 |
CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2 |
CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3);
else if (speed_cap == PCIE_SPEED_5_0GT)
else if (platform_speed_cap == PCIE_SPEED_5_0GT)
adev->pm.pcie_gen_mask |= (CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1 |
CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2);
else
@ -3697,12 +3733,10 @@ static void amdgpu_device_get_pcie_info(struct amdgpu_device *adev)
}
}
if (adev->pm.pcie_mlw_mask == 0) {
pdev = adev->ddev->pdev->bus->self;
link_width = pcie_get_width_cap(pdev);
if (link_width == PCIE_LNK_WIDTH_UNKNOWN) {
if (platform_link_width == PCIE_LNK_WIDTH_UNKNOWN) {
adev->pm.pcie_mlw_mask |= AMDGPU_DEFAULT_PCIE_MLW_MASK;
} else {
switch (link_width) {
switch (platform_link_width) {
case PCIE_LNK_X32:
adev->pm.pcie_mlw_mask = (CAIL_PCIE_LINK_WIDTH_SUPPORT_X32 |
CAIL_PCIE_LINK_WIDTH_SUPPORT_X16 |