git/linux-net
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/ synced 2026-04-18 06:33:43 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/amdgpu: modify a pair of functions for the pcie port wreg/rreg

Browse Source 
This patch will modify a pair of functions for pcie port wreg/rreg.
AMD GPU have had an independent NBIO block from SOC15 arch.
If the dirver wants to read/write the address space of the pcie devices,
it has to go through the NBIO block.
This patch will move the pcie port wreg/rreg functions to
"amdgpu_device.c", so that to reuse the functions on the
future GPU ASICs.

Signed-off-by: Xiaojian Du <Xiaojian.Du@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Xiaojian Du
2022-01-18 17:18:13 +08:00
committed by Alex Deucher
parent 479e3b02b7
commit 86700a4026
3 changed files with 39 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View File

@@ -5728,3 +5728,36 @@ void amdgpu_device_halt(struct amdgpu_device *adev)
pci_disable_device(pdev);
pci_wait_for_pending_transaction(pdev);
}
u32 amdgpu_device_pcie_port_rreg(struct amdgpu_device *adev,
u32 reg)
{
unsigned long flags, address, data;
u32 r;
address = adev->nbio.funcs->get_pcie_port_index_offset(adev);
data = adev->nbio.funcs->get_pcie_port_data_offset(adev);
spin_lock_irqsave(&adev->pcie_idx_lock, flags);
WREG32(address, reg * 4);
(void)RREG32(address);
r = RREG32(data);
spin_unlock_irqrestore(&adev->pcie_idx_lock, flags);
return r;
}
void amdgpu_device_pcie_port_wreg(struct amdgpu_device *adev,
u32 reg, u32 v)
{
unsigned long flags, address, data;
address = adev->nbio.funcs->get_pcie_port_index_offset(adev);
data = adev->nbio.funcs->get_pcie_port_data_offset(adev);
spin_lock_irqsave(&adev->pcie_idx_lock, flags);
WREG32(address, reg * 4);
(void)RREG32(address);
WREG32(data, v);
(void)RREG32(data);
spin_unlock_irqrestore(&adev->pcie_idx_lock, flags);
}