navi10_ih_enable_ring will be used to enable an
ih ring for navi1x and onwards
Signed-off-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Acked-by: Christian König <christian.koenig@xxxxxxx>
Acked-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
Reviewed-by: Dennis Li <Dennis.Li@xxxxxxx>
Reviewed-by: Feifei Xu <Feifei.Xu@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/navi10_ih.c | 52 ++++++++++++++++++++++++++
1 file changed, 52 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/navi10_ih.c b/drivers/gpu/drm/amd/amdgpu/navi10_ih.c
index b5a0327edaa3..c2a006d57818 100644
--- a/drivers/gpu/drm/amd/amdgpu/navi10_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/navi10_ih.c
@@ -300,6 +300,58 @@ static uint32_t navi10_ih_doorbell_rptr(struct amdgpu_ih_ring *ih)
return ih_doorbell_rtpr;
}
+/**
+ * navi10_ih_enable_ring - enable an ih ring buffer
+ *
+ * @adev: amdgpu_device pointer
+ * @ih: amdgpu_ih_ring pointer
+ *
+ * Enable an ih ring buffer (NAVI10)
+ */
+static int navi10_ih_enable_ring(struct amdgpu_device *adev,
+ struct amdgpu_ih_ring *ih)
+{
+ struct amdgpu_ih_regs *ih_regs;
+ uint32_t tmp;
+
+ ih_regs = &ih->ih_regs;
+
+ /* Ring Buffer base. [39:8] of 40-bit address of the beginning of the ring buffer*/
+ WREG32(ih_regs->ih_rb_base, ih->gpu_addr >> 8);
+ WREG32(ih_regs->ih_rb_base_hi, (ih->gpu_addr >> 40) & 0xff);
+
+ tmp = RREG32(ih_regs->ih_rb_cntl);
+ tmp = navi10_ih_rb_cntl(ih, tmp);
+ if (ih == &adev->irq.ih)
+ tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RPTR_REARM, !!adev->irq.msi_enabled);
+ if (ih == &adev->irq.ih1) {
+ tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_ENABLE, 0);
+ tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_FULL_DRAIN_ENABLE, 1);
+ }
+ if (amdgpu_sriov_vf(adev) && adev->asic_type < CHIP_NAVI10) {
+ if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) {
+ dev_err(adev->dev, "PSP program IH_RB_CNTL failed!\n");
+ return -ETIMEDOUT;
+ }
+ } else {
+ WREG32(ih_regs->ih_rb_cntl, tmp);
+ }
+
+ if (ih == &adev->irq.ih) {
+ /* set the ih ring 0 writeback address whether it's enabled or not */
+ WREG32(ih_regs->ih_rb_wptr_addr_lo, lower_32_bits(ih->wptr_addr));
+ WREG32(ih_regs->ih_rb_wptr_addr_hi, upper_32_bits(ih->wptr_addr) & 0xFFFF);
+ }
+
+ /* set rptr, wptr to 0 */
+ WREG32(ih_regs->ih_rb_wptr, 0);
+ WREG32(ih_regs->ih_rb_rptr, 0);
+
+ WREG32(ih_regs->ih_doorbell_rptr, navi10_ih_doorbell_rptr(ih));
+
+ return 0;
+}
+
static void navi10_ih_reroute_ih(struct amdgpu_device *adev)
{
uint32_t tmp;
--
2.17.1
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