-----Original Message-----
From: amd-gfx <amd-gfx-boun...@lists.freedesktop.org> On Behalf Of Zhang,
Hawking
Sent: Friday, September 18, 2020 8:07 AM
To: Koenig, Christian <christian.koe...@amd.com>; amd-gfx@lists.freedesktop.org;
Deucher, Alexander <alexander.deuc...@amd.com>; Wang, Kevin(Yang)
<kevin1.w...@amd.com>; Chen, Guchun <guchun.c...@amd.com>
Subject: RE: [PATCH 3/3] drm/amdgpu: support indirect access reg outside of
mmio bar (v2)
[AMD Public Use]
+ } else
RE - This should use "} else {". Apart from that looks good to me.
Hi Chris,
Since there is only one line under "else", I dropped the "{}". I thought that
is okay in current
kernel coding style and checkpatch.pl also shows no complain.
So you mean you want the code to be the following?
} else {
ret = adev->pcie_rreg(adev, reg * 4);
}
I can make the change anyway. Does that mean I can get your RB with coding
style change
for the series?
Regards,
Hawking
-----Original Message-----
From: Christian König <ckoenig.leichtzumer...@gmail.com>
Sent: Friday, September 18, 2020 19:27
To: Zhang, Hawking <hawking.zh...@amd.com>; amd-gfx@lists.freedesktop.org;
Deucher,
Alexander <alexander.deuc...@amd.com>; Wang, Kevin(Yang)
<kevin1.w...@amd.com>; Koenig, Christian <christian.koe...@amd.com>; Chen,
Guchun
<guchun.c...@amd.com>
Subject: Re: [PATCH 3/3] drm/amdgpu: support indirect access reg outside of
mmio bar (v2)
Am 18.09.20 um 11:51 schrieb Hawking Zhang:
support both direct and indirect accessor in unified helper functions.
v2: Retire indirect mmio access via mm_index/data
Signed-off-by: Hawking Zhang <hawking.zh...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 23 +++----
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 96
+++++++++++------------------
drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h | 4 +-
4 files changed, 51 insertions(+), 74 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 40ee44b..50341f0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1019,12 +1019,13 @@ int amdgpu_gpu_wait_for_idle(struct
amdgpu_device *adev);
void amdgpu_device_vram_access(struct amdgpu_device *adev, loff_t pos,
uint32_t *buf, size_t size, bool write);
-uint32_t
amdgpu_mm_rreg(struct amdgpu_device *adev, uint32_t reg,
+uint32_t amdgpu_device_rreg(struct amdgpu_device *adev,
+ uint32_t reg, uint32_t acc_flags); void
+amdgpu_device_wreg(struct amdgpu_device *adev,
+ uint32_t reg, uint32_t v,
uint32_t acc_flags);
-void amdgpu_mm_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v,
- uint32_t acc_flags);
-void amdgpu_mm_wreg_mmio_rlc(struct amdgpu_device *adev, uint32_t reg,
uint32_t v,
- uint32_t acc_flags);
+void amdgpu_mm_wreg_mmio_rlc(struct amdgpu_device *adev,
+ uint32_t reg, uint32_t v);
void amdgpu_mm_wreg8(struct amdgpu_device *adev, uint32_t offset, uint8_t
value);
uint8_t amdgpu_mm_rreg8(struct amdgpu_device *adev, uint32_t
offset);
@@ -1054,8 +1055,8 @@ int emu_soc_asic_init(struct amdgpu_device *adev);
*/
#define AMDGPU_REGS_NO_KIQ (1<<1)
-#define RREG32_NO_KIQ(reg) amdgpu_mm_rreg(adev, (reg),
AMDGPU_REGS_NO_KIQ) -#define WREG32_NO_KIQ(reg, v)
amdgpu_mm_wreg(adev, (reg), (v), AMDGPU_REGS_NO_KIQ)
+#define RREG32_NO_KIQ(reg) amdgpu_device_rreg(adev, (reg),
+AMDGPU_REGS_NO_KIQ) #define WREG32_NO_KIQ(reg, v)
+amdgpu_device_wreg(adev, (reg), (v), AMDGPU_REGS_NO_KIQ)
#define RREG32_KIQ(reg) amdgpu_kiq_rreg(adev, (reg))
#define WREG32_KIQ(reg, v) amdgpu_kiq_wreg(adev, (reg), (v)) @@
-1063,9 +1064,9 @@ int emu_soc_asic_init(struct amdgpu_device *adev);
#define RREG8(reg) amdgpu_mm_rreg8(adev, (reg))
#define WREG8(reg, v) amdgpu_mm_wreg8(adev, (reg), (v))
-#define RREG32(reg) amdgpu_mm_rreg(adev, (reg), 0) -#define
DREG32(reg) printk(KERN_INFO "REGISTER: " #reg " : 0x%08X\n",
amdgpu_mm_rreg(adev, (reg), 0)) -#define WREG32(reg, v)
amdgpu_mm_wreg(adev, (reg), (v), 0)
+#define RREG32(reg) amdgpu_device_rreg(adev, (reg), 0) #define
+DREG32(reg) printk(KERN_INFO "REGISTER: " #reg " : 0x%08X\n",
+amdgpu_device_rreg(adev, (reg), 0)) #define WREG32(reg, v)
+amdgpu_device_wreg(adev, (reg), (v), 0)
#define REG_SET(FIELD, v) (((v) << FIELD##_SHIFT) & FIELD##_MASK)
#define REG_GET(FIELD, v) (((v) << FIELD##_SHIFT) & FIELD##_MASK)
#define RREG32_PCIE(reg) adev->pcie_rreg(adev, (reg)) @@ -1111,7
+1112,7 @@ int emu_soc_asic_init(struct amdgpu_device *adev);
WREG32_SMC(_Reg, tmp); \
} while (0)
-#define DREG32_SYS(sqf, adev, reg) seq_printf((sqf), #reg " :
0x%08X\n", amdgpu_mm_rreg((adev), (reg), false))
+#define DREG32_SYS(sqf, adev, reg) seq_printf((sqf), #reg " :
+0x%08X\n", amdgpu_device_rreg((adev), (reg), false))
#define RREG32_IO(reg) amdgpu_io_rreg(adev, (reg))
#define WREG32_IO(reg, v) amdgpu_io_wreg(adev, (reg), (v))
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index abe0c27..2d125b8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -267,7 +267,7 @@ static int amdgpu_debugfs_process_reg_op(bool read, struct
file
*f,
} else {
r = get_user(value, (uint32_t *)buf);
if (!r)
- amdgpu_mm_wreg_mmio_rlc(adev, *pos >> 2, value,
0);
+ amdgpu_mm_wreg_mmio_rlc(adev, *pos >> 2, value);
}
if (r) {
result = r;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 77785b2..beef764 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -303,10 +303,10 @@ void amdgpu_device_vram_access(struct amdgpu_device
*adev, loff_t pos,
}
/*
- * MMIO register access helper functions.
+ * register access helper functions.
*/
/**
- * amdgpu_mm_rreg - read a memory mapped IO register
+ * amdgpu_device_rreg - read a memory mapped IO or indirect register
*
* @adev: amdgpu_device pointer
* @reg: dword aligned register offset @@ -314,33 +314,27 @@ void
amdgpu_device_vram_access(struct amdgpu_device *adev, loff_t pos,
*
* Returns the 32 bit value from the offset specified.
*/
-uint32_t amdgpu_mm_rreg(struct amdgpu_device *adev, uint32_t reg,
- uint32_t acc_flags)
+uint32_t amdgpu_device_rreg(struct amdgpu_device *adev,
+ uint32_t reg, uint32_t acc_flags)
{
uint32_t ret;
if (adev->in_pci_err_recovery)
return 0;
- if (!(acc_flags & AMDGPU_REGS_NO_KIQ) && amdgpu_sriov_runtime(adev) &&
- down_read_trylock(&adev->reset_sem)) {
- ret = amdgpu_kiq_rreg(adev, reg);
- up_read(&adev->reset_sem);
- return ret;
- }
-
- if ((reg * 4) < adev->rmmio_size)
- ret = readl(((void __iomem *)adev->rmmio) + (reg * 4));
- else {
- unsigned long flags;
+ if ((reg * 4) < adev->rmmio_size) {
+ if (!(acc_flags & AMDGPU_REGS_NO_KIQ) &&
+ amdgpu_sriov_runtime(adev) &&
+ down_read_trylock(&adev->reset_sem)) {
+ ret = amdgpu_kiq_rreg(adev, reg);
+ up_read(&adev->reset_sem);
+ } else
+ ret = readl(((void __iomem *)adev->rmmio) + (reg * 4));
+ } else
This should use "} else {". Apart from that looks good to me.
Christian.
+ ret = adev->pcie_rreg(adev, reg * 4);
- spin_lock_irqsave(&adev->mmio_idx_lock, flags);
- writel((reg * 4), ((void __iomem *)adev->rmmio) + (mmMM_INDEX *
4));
- ret = readl(((void __iomem *)adev->rmmio) + (mmMM_DATA * 4));
- spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
- }
+ trace_amdgpu_device_rreg(adev->pdev->device, reg, ret);
- trace_amdgpu_mm_rreg(adev->pdev->device, reg, ret);
return ret;
}
@@ -394,29 +388,8 @@ void amdgpu_mm_wreg8(struct amdgpu_device *adev, uint32_t
offset, uint8_t value)
BUG();
}
-static inline void amdgpu_mm_wreg_mmio(struct amdgpu_device *adev,
- uint32_t reg, uint32_t v,
- uint32_t acc_flags)
-{
- if (adev->in_pci_err_recovery)
- return;
-
- trace_amdgpu_mm_wreg(adev->pdev->device, reg, v);
-
- if ((reg * 4) < adev->rmmio_size)
- writel(v, ((void __iomem *)adev->rmmio) + (reg * 4));
- else {
- unsigned long flags;
-
- spin_lock_irqsave(&adev->mmio_idx_lock, flags);
- writel((reg * 4), ((void __iomem *)adev->rmmio) + (mmMM_INDEX *
4));
- writel(v, ((void __iomem *)adev->rmmio) + (mmMM_DATA * 4));
- spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
- }
-}
-
/**
- * amdgpu_mm_wreg - write to a memory mapped IO register
+ * amdgpu_device_wreg - write to a memory mapped IO or indirect
+ register
*
* @adev: amdgpu_device pointer
* @reg: dword aligned register offset @@ -425,20 +398,25 @@ static
inline void amdgpu_mm_wreg_mmio(struct amdgpu_device *adev,
*
* Writes the value specified to the offset specified.
*/
-void amdgpu_mm_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v,
- uint32_t acc_flags)
+void amdgpu_device_wreg(struct amdgpu_device *adev,
+ uint32_t reg, uint32_t v,
+ uint32_t acc_flags)
{
if (adev->in_pci_err_recovery)
return;
- if (!(acc_flags & AMDGPU_REGS_NO_KIQ) && amdgpu_sriov_runtime(adev) &&
- down_read_trylock(&adev->reset_sem)) {
- amdgpu_kiq_wreg(adev, reg, v);
- up_read(&adev->reset_sem);
- return;
- }
+ if ((reg * 4) < adev->rmmio_size) {
+ if (!(acc_flags & AMDGPU_REGS_NO_KIQ) &&
+ amdgpu_sriov_runtime(adev) &&
+ down_read_trylock(&adev->reset_sem)) {
+ amdgpu_kiq_wreg(adev, reg, v);
+ up_read(&adev->reset_sem);
+ } else
+ writel(v, ((void __iomem *)adev->rmmio) + (reg * 4));
+ } else
+ adev->pcie_wreg(adev, reg * 4, v);
- amdgpu_mm_wreg_mmio(adev, reg, v, acc_flags);
+ trace_amdgpu_device_wreg(adev->pdev->device, reg, v);
}
/*
@@ -446,21 +424,19 @@ void amdgpu_mm_wreg(struct amdgpu_device *adev, uint32_t
reg, uint32_t v,
*
* this function is invoked only the debugfs register access
* */
-void amdgpu_mm_wreg_mmio_rlc(struct amdgpu_device *adev, uint32_t reg,
uint32_t v,
- uint32_t acc_flags)
+void amdgpu_mm_wreg_mmio_rlc(struct amdgpu_device *adev,
+ uint32_t reg, uint32_t v)
{
if (adev->in_pci_err_recovery)
return;
if (amdgpu_sriov_fullaccess(adev) &&
- adev->gfx.rlc.funcs &&
- adev->gfx.rlc.funcs->is_rlcg_access_range) {
-
+ adev->gfx.rlc.funcs &&
+ adev->gfx.rlc.funcs->is_rlcg_access_range) {
if (adev->gfx.rlc.funcs->is_rlcg_access_range(adev, reg))
return adev->gfx.rlc.funcs->rlcg_wreg(adev, reg, v);
- }
-
- amdgpu_mm_wreg_mmio(adev, reg, v, acc_flags);
+ } else
+ writel(v, ((void __iomem *)adev->rmmio) + (reg * 4));
}
/**
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h
b/drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h
index 63e734a..5da20fc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h
@@ -35,7 +35,7 @@
#define AMDGPU_JOB_GET_TIMELINE_NAME(job) \
job->base.s_fence->finished.ops->get_timeline_name(&job->base.s_fence-
finished)
-TRACE_EVENT(amdgpu_mm_rreg,
+TRACE_EVENT(amdgpu_device_rreg,
TP_PROTO(unsigned did, uint32_t reg, uint32_t value),
TP_ARGS(did, reg, value),
TP_STRUCT__entry(
@@ -54,7 +54,7 @@ TRACE_EVENT(amdgpu_mm_rreg,
(unsigned long)__entry->value)
);
-TRACE_EVENT(amdgpu_mm_wreg,
+TRACE_EVENT(amdgpu_device_wreg,
TP_PROTO(unsigned did, uint32_t reg, uint32_t value),
TP_ARGS(did, reg, value),
TP_STRUCT__entry(
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