[PATCH 1/2] drm/amdgpu/sriov: For sriov runtime, use kiq to do invalidate tlb
Alex Deucher
alexdeucher at gmail.com
Wed Aug 15 14:13:55 UTC 2018
On Wed, Aug 15, 2018 at 9:56 AM Zhu, Rex <Rex.Zhu at amd.com> wrote:
>
>
>
> > -----Original Message-----
> > From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Emily
> > Deng
> > Sent: Wednesday, August 15, 2018 5:48 PM
> > To: amd-gfx at lists.freedesktop.org
> > Cc: Deng, Emily <Emily.Deng at amd.com>
> > Subject: [PATCH 1/2] drm/amdgpu/sriov: For sriov runtime, use kiq to do
> > invalidate tlb
> >
> > To avoid the tlb flush not interrupted by world switch, use kiq and one
> > command to do tlb invalidate.
> >
> > v2:
> > Add firmware version checking.
> >
> > v3:
> > Refine the code, and move the firmware
> > checking into gfx_v9_0_ring_emit_reg_write_reg_wait.
> >
> > SWDEV-161497
>
> The "SWDEV-161497" is meanless.
> you can describe the issue or just remove the bug number.
>
> >
> > Signed-off-by: Emily Deng <Emily.Deng at amd.com>
> > ---
> > drivers/gpu/drm/amd/amdgpu/amdgpu.h | 4 +++
> > drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 3 --
> > drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 15 +++++++-
> > drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 61
> > ++++++++++++++++++++++++++++++++
> > 4 files changed, 79 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> > b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> > index 07924d4..67b584b 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> > @@ -210,6 +210,10 @@ enum amdgpu_kiq_irq {
> > AMDGPU_CP_KIQ_IRQ_LAST
> > };
> >
> > +#define MAX_KIQ_REG_WAIT 5000 /* in usecs, 5ms */
> > +#define MAX_KIQ_REG_BAILOUT_INTERVAL 5 /* in msecs, 5ms */
> > +#define MAX_KIQ_REG_TRY 20
> > +
> > int amdgpu_device_ip_set_clockgating_state(void *dev,
> > enum amd_ip_block_type
> > block_type,
> > enum amd_clockgating_state state);
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> > b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> > index 21adb1b6..3885636 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> > @@ -22,9 +22,6 @@
> > */
> >
> > #include "amdgpu.h"
> > -#define MAX_KIQ_REG_WAIT 5000 /* in usecs, 5ms */
> > -#define MAX_KIQ_REG_BAILOUT_INTERVAL 5 /* in msecs, 5ms */
> > -#define MAX_KIQ_REG_TRY 20
> >
> > uint64_t amdgpu_csa_vaddr(struct amdgpu_device *adev) { diff --git
> > a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> > b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> > index 76d979e..c9b3db4 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> > @@ -4348,8 +4348,21 @@ static void
> > gfx_v9_0_ring_emit_reg_write_reg_wait(struct amdgpu_ring *ring,
> > uint32_t ref, uint32_t mask)
> > {
> > int usepfp = (ring->funcs->type == AMDGPU_RING_TYPE_GFX);
> > + struct amdgpu_device *adev = ring->adev;
> > + bool fw_version_ok = false;
> >
> > - if (amdgpu_sriov_vf(ring->adev))
> > + if (ring->funcs->type == AMDGPU_RING_TYPE_GFX) {
> > + if ((adev->gfx.me_fw_version >= 0x0000009c) && (adev-
> > >gfx.me_feature_version >= 42))
> > + if ((adev->gfx.pfp_fw_version >= 0x000000b1) &&
> > (adev->gfx.pfp_feature_version >= 42))
> > + fw_version_ok = true;
> > + } else {
> > + if ((adev->gfx.mec_fw_version >= 0x00000193) && (adev-
> > >gfx.mec_feature_version >= 42))
> > + fw_version_ok = true;
> > + }
>
> Maybe we can add a flag and set the flag when request_firmware.
I was going to suggest the same thing.
>
> > +
> > + fw_version_ok = (adev->asic_type == CHIP_VEGA10) ? fw_version_ok
Also is this specific to vega10 or do all gfx9 parts have this fix?
Please verify.
Alex
> > :
> > +false;
> > +
> > + if (amdgpu_sriov_vf(adev) && fw_version_ok)
> > gfx_v9_0_wait_reg_mem(ring, usepfp, 0, 1, reg0, reg1,
> > ref, mask, 0x20);
> > else
> > diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> > b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> > index ed467de..3419178 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> > @@ -311,6 +311,60 @@ static uint32_t
> > gmc_v9_0_get_invalidate_req(unsigned int vmid)
> > return req;
> > }
> >
> > +signed long amdgpu_kiq_invalidate_tlb(struct amdgpu_device *adev, struct
> > amdgpu_vmhub *hub,
> > + unsigned eng, u32 req, uint32_t vmid) {
> > + signed long r, cnt = 0;
> > + unsigned long flags;
> > + uint32_t seq;
> > + struct amdgpu_kiq *kiq = &adev->gfx.kiq;
> > + struct amdgpu_ring *ring = &kiq->ring;
> > +
> > + if (!ring->ready) {
> > + return -EINVAL;
> > + }
> > +
> > + spin_lock_irqsave(&kiq->ring_lock, flags);
> > +
> > + amdgpu_ring_alloc(ring, 32);
> > + amdgpu_ring_emit_reg_write_reg_wait(ring, hub->vm_inv_eng0_req
> > + eng,
> > + hub->vm_inv_eng0_ack + eng,
> > + req, 1 << vmid);
> > + amdgpu_fence_emit_polling(ring, &seq);
> > + amdgpu_ring_commit(ring);
> > + spin_unlock_irqrestore(&kiq->ring_lock, flags);
> > +
> > + r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
> > +
> > + /* don't wait anymore for gpu reset case because this way may
> > + * block gpu_recover() routine forever, e.g. this virt_kiq_rreg
> > + * is triggered in TTM and ttm_bo_lock_delayed_workqueue() will
> > + * never return if we keep waiting in virt_kiq_rreg, which cause
> > + * gpu_recover() hang there.
> > + *
> > + * also don't wait anymore for IRQ context
> > + * */
> > + if (r < 1 && (adev->in_gpu_reset || in_interrupt()))
> > + goto failed_kiq;
> > +
> > + if (in_interrupt())
> > + might_sleep();
> > +
> > + while (r < 1 && cnt++ < MAX_KIQ_REG_TRY) {
> > + msleep(MAX_KIQ_REG_BAILOUT_INTERVAL);
> > + r = amdgpu_fence_wait_polling(ring, seq,
> > MAX_KIQ_REG_WAIT);
> > + }
> > +
> > + if (cnt > MAX_KIQ_REG_TRY)
> > + goto failed_kiq;
> > +
> > + return 0;
> > +
> > +failed_kiq:
> > + pr_err("failed to invalidate tlb with kiq\n");
> > + return r;
> > +}
> > +
> > /*
> > * GART
> > * VMID 0 is the physical GPU addresses as used by the kernel.
> > @@ -332,6 +386,7 @@ static void gmc_v9_0_flush_gpu_tlb(struct
> > amdgpu_device *adev,
> > /* Use register 17 for GART */
> > const unsigned eng = 17;
> > unsigned i, j;
> > + int r;
> >
> > spin_lock(&adev->gmc.invalidate_lock);
> >
> > @@ -339,6 +394,12 @@ static void gmc_v9_0_flush_gpu_tlb(struct
> > amdgpu_device *adev,
> > struct amdgpu_vmhub *hub = &adev->vmhub[i];
> > u32 tmp = gmc_v9_0_get_invalidate_req(vmid);
> >
> > + if (amdgpu_sriov_vf(adev) ) {
> > + r = amdgpu_kiq_invalidate_tlb(adev, hub, eng, tmp,
> > vmid);
> > + if (!r)
> > + continue;
> > + }
> > +
> > WREG32_NO_KIQ(hub->vm_inv_eng0_req + eng, tmp);
> >
> > /* Busy wait for ACK.*/
> > --
> > 2.7.4
> >
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