[PATCH 10/26] drm/amdgpu: add RREG64/WREG64(_PCIE) operations
Alex Deucher
alexdeucher at gmail.com
Wed Jul 31 17:58:02 UTC 2019
From: Tao Zhou <tao.zhou1 at amd.com>
add 64 bits register access functions
v2: implement 64 bit functions in low level
Signed-off-by: Tao Zhou <tao.zhou1 at amd.com>
Reviewed-by: Dennis Li <dennis.li at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 11 ++++
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 73 ++++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/soc15.c | 45 +++++++++++++
3 files changed, 129 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 72d0331f4ca1..3e2b623d86c7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -640,6 +640,9 @@ void amdgpu_cgs_destroy_device(struct cgs_device *cgs_device);
typedef uint32_t (*amdgpu_rreg_t)(struct amdgpu_device*, uint32_t);
typedef void (*amdgpu_wreg_t)(struct amdgpu_device*, uint32_t, uint32_t);
+typedef uint64_t (*amdgpu_rreg64_t)(struct amdgpu_device*, uint32_t);
+typedef void (*amdgpu_wreg64_t)(struct amdgpu_device*, uint32_t, uint64_t);
+
typedef uint32_t (*amdgpu_block_rreg_t)(struct amdgpu_device*, uint32_t, uint32_t);
typedef void (*amdgpu_block_wreg_t)(struct amdgpu_device*, uint32_t, uint32_t, uint32_t);
@@ -833,6 +836,8 @@ struct amdgpu_device {
amdgpu_wreg_t pcie_wreg;
amdgpu_rreg_t pciep_rreg;
amdgpu_wreg_t pciep_wreg;
+ amdgpu_rreg64_t pcie_rreg64;
+ amdgpu_wreg64_t pcie_wreg64;
/* protects concurrent UVD register access */
spinlock_t uvd_ctx_idx_lock;
amdgpu_rreg_t uvd_ctx_rreg;
@@ -1033,6 +1038,8 @@ void amdgpu_mm_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v,
uint32_t acc_flags);
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);
+uint64_t amdgpu_mm_rreg64(struct amdgpu_device *adev, uint32_t reg);
+void amdgpu_mm_wreg64(struct amdgpu_device *adev, uint32_t reg, uint64_t v);
u32 amdgpu_io_rreg(struct amdgpu_device *adev, u32 reg);
void amdgpu_io_wreg(struct amdgpu_device *adev, u32 reg, u32 v);
@@ -1060,12 +1067,16 @@ int emu_soc_asic_init(struct amdgpu_device *adev);
#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 WREG32_IDX(reg, v) amdgpu_mm_wreg(adev, (reg), (v), AMDGPU_REGS_IDX)
+#define RREG64(reg) amdgpu_mm_rreg64(adev, (reg))
+#define WREG64(reg, v) amdgpu_mm_wreg64(adev, (reg), (v))
#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))
#define WREG32_PCIE(reg, v) adev->pcie_wreg(adev, (reg), (v))
#define RREG32_PCIE_PORT(reg) adev->pciep_rreg(adev, (reg))
#define WREG32_PCIE_PORT(reg, v) adev->pciep_wreg(adev, (reg), (v))
+#define RREG64_PCIE(reg) adev->pcie_rreg64(adev, (reg))
+#define WREG64_PCIE(reg, v) adev->pcie_wreg64(adev, (reg), (v))
#define RREG32_SMC(reg) adev->smc_rreg(adev, (reg))
#define WREG32_SMC(reg, v) adev->smc_wreg(adev, (reg), (v))
#define RREG32_UVD_CTX(reg) adev->uvd_ctx_rreg(adev, (reg))
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 127ed01ed8fd..08ba05c34782 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -260,6 +260,43 @@ void amdgpu_mm_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v,
}
}
+/**
+ * amdgpu_mm_rreg64 - read a 64 bit memory mapped IO register
+ *
+ * @adev: amdgpu_device pointer
+ * @reg: dword aligned register offset
+ *
+ * Returns the 64 bit value from the offset specified.
+ */
+uint64_t amdgpu_mm_rreg64(struct amdgpu_device *adev, uint32_t reg)
+{
+ uint64_t ret;
+
+ if ((reg * 4) < adev->rmmio_size)
+ ret = readq(((void __iomem *)adev->rmmio) + (reg * 4));
+ else
+ BUG();
+
+ return ret;
+}
+
+/**
+ * amdgpu_mm_wreg64 - write to a 64 bit memory mapped IO register
+ *
+ * @adev: amdgpu_device pointer
+ * @reg: dword aligned register offset
+ * @v: 64 bit value to write to the register
+ *
+ * Writes the value specified to the offset specified.
+ */
+void amdgpu_mm_wreg64(struct amdgpu_device *adev, uint32_t reg, uint64_t v)
+{
+ if ((reg * 4) < adev->rmmio_size)
+ writeq(v, ((void __iomem *)adev->rmmio) + (reg * 4));
+ else
+ BUG();
+}
+
/**
* amdgpu_io_rreg - read an IO register
*
@@ -415,6 +452,40 @@ static void amdgpu_invalid_wreg(struct amdgpu_device *adev, uint32_t reg, uint32
BUG();
}
+/**
+ * amdgpu_invalid_rreg64 - dummy 64 bit reg read function
+ *
+ * @adev: amdgpu device pointer
+ * @reg: offset of register
+ *
+ * Dummy register read function. Used for register blocks
+ * that certain asics don't have (all asics).
+ * Returns the value in the register.
+ */
+static uint64_t amdgpu_invalid_rreg64(struct amdgpu_device *adev, uint32_t reg)
+{
+ DRM_ERROR("Invalid callback to read 64 bit register 0x%04X\n", reg);
+ BUG();
+ return 0;
+}
+
+/**
+ * amdgpu_invalid_wreg64 - dummy reg write function
+ *
+ * @adev: amdgpu device pointer
+ * @reg: offset of register
+ * @v: value to write to the register
+ *
+ * Dummy register read function. Used for register blocks
+ * that certain asics don't have (all asics).
+ */
+static void amdgpu_invalid_wreg64(struct amdgpu_device *adev, uint32_t reg, uint64_t v)
+{
+ DRM_ERROR("Invalid callback to write 64 bit register 0x%04X with 0x%08llX\n",
+ reg, v);
+ BUG();
+}
+
/**
* amdgpu_block_invalid_rreg - dummy reg read function
*
@@ -2536,6 +2607,8 @@ int amdgpu_device_init(struct amdgpu_device *adev,
adev->pcie_wreg = &amdgpu_invalid_wreg;
adev->pciep_rreg = &amdgpu_invalid_rreg;
adev->pciep_wreg = &amdgpu_invalid_wreg;
+ adev->pcie_rreg64 = &amdgpu_invalid_rreg64;
+ adev->pcie_wreg64 = &amdgpu_invalid_wreg64;
adev->uvd_ctx_rreg = &amdgpu_invalid_rreg;
adev->uvd_ctx_wreg = &amdgpu_invalid_wreg;
adev->didt_rreg = &amdgpu_invalid_rreg;
diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
index 347a44f2757a..214fc9d880e5 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -115,6 +115,49 @@ static void soc15_pcie_wreg(struct amdgpu_device *adev, u32 reg, u32 v)
spin_unlock_irqrestore(&adev->pcie_idx_lock, flags);
}
+static u64 soc15_pcie_rreg64(struct amdgpu_device *adev, u32 reg)
+{
+ unsigned long flags, address, data;
+ u64 r;
+ address = adev->nbio_funcs->get_pcie_index_offset(adev);
+ data = adev->nbio_funcs->get_pcie_data_offset(adev);
+
+ spin_lock_irqsave(&adev->pcie_idx_lock, flags);
+ /* read low 32 bit */
+ WREG32(address, reg);
+ (void)RREG32(address);
+ r = RREG32(data);
+
+ /* read high 32 bit*/
+ WREG32(address, reg + 4);
+ (void)RREG32(address);
+ r |= ((u64)RREG32(data) << 32);
+ spin_unlock_irqrestore(&adev->pcie_idx_lock, flags);
+ return r;
+}
+
+static void soc15_pcie_wreg64(struct amdgpu_device *adev, u32 reg, u64 v)
+{
+ unsigned long flags, address, data;
+
+ address = adev->nbio_funcs->get_pcie_index_offset(adev);
+ data = adev->nbio_funcs->get_pcie_data_offset(adev);
+
+ spin_lock_irqsave(&adev->pcie_idx_lock, flags);
+ /* write low 32 bit */
+ WREG32(address, reg);
+ (void)RREG32(address);
+ WREG32(data, (u32)(v & 0xffffffffULL));
+ (void)RREG32(data);
+
+ /* write high 32 bit */
+ WREG32(address, reg + 4);
+ (void)RREG32(address);
+ WREG32(data, (u32)(v >> 32));
+ (void)RREG32(data);
+ spin_unlock_irqrestore(&adev->pcie_idx_lock, flags);
+}
+
static u32 soc15_uvd_ctx_rreg(struct amdgpu_device *adev, u32 reg)
{
unsigned long flags, address, data;
@@ -865,6 +908,8 @@ static int soc15_common_early_init(void *handle)
adev->smc_wreg = NULL;
adev->pcie_rreg = &soc15_pcie_rreg;
adev->pcie_wreg = &soc15_pcie_wreg;
+ adev->pcie_rreg64 = &soc15_pcie_rreg64;
+ adev->pcie_wreg64 = &soc15_pcie_wreg64;
adev->uvd_ctx_rreg = &soc15_uvd_ctx_rreg;
adev->uvd_ctx_wreg = &soc15_uvd_ctx_wreg;
adev->didt_rreg = &soc15_didt_rreg;
--
2.20.1
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