This patch:
- creates a new file for doorbell management.
- moves doorbell code from amdgpu_device.c to this file.
V2:
- remove doc from function declaration (Christian)
- remove 'device' from function names to make it consistent (Alex)
- add SPDX license identifier (Luben)
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: Christian Koenig <christian.koenig@xxxxxxx>
Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/Makefile | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 174 +----------------
drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h | 6 +
.../gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c | 183 ++++++++++++++++++
4 files changed, 195 insertions(+), 170 deletions(-)
create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c
diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index 798d0e9a60b7..204665f20319 100644
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/drivers/gpu/drm/amd/amdgpu/Makefile
@@ -41,7 +41,7 @@ ccflags-y := -I$(FULL_AMD_PATH)/include/asic_reg \
amdgpu-y := amdgpu_drv.o
# add KMS driver
-amdgpu-y += amdgpu_device.o amdgpu_kms.o \
+amdgpu-y += amdgpu_device.o amdgpu_doorbell_mgr.o amdgpu_kms.o \
amdgpu_atombios.o atombios_crtc.o amdgpu_connectors.o \
atom.o amdgpu_fence.o amdgpu_ttm.o amdgpu_object.o amdgpu_gart.o \
amdgpu_encoders.o amdgpu_display.o amdgpu_i2c.o \
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 57ee1c4a81e9..88c75f7a8d66 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -579,94 +579,6 @@ void amdgpu_mm_wreg_mmio_rlc(struct amdgpu_device *adev,
}
}
-/**
- * amdgpu_mm_rdoorbell - read a doorbell dword
- *
- * @adev: amdgpu_device pointer
- * @index: doorbell index
- *
- * Returns the value in the doorbell aperture at the
- * requested doorbell index (CIK).
- */
-u32 amdgpu_mm_rdoorbell(struct amdgpu_device *adev, u32 index)
-{
- if (amdgpu_device_skip_hw_access(adev))
- return 0;
-
- if (index < adev->doorbell.num_kernel_doorbells) {
- return readl(adev->doorbell.ptr + index);
- } else {
- DRM_ERROR("reading beyond doorbell aperture: 0x%08x!\n", index);
- return 0;
- }
-}
-
-/**
- * amdgpu_mm_wdoorbell - write a doorbell dword
- *
- * @adev: amdgpu_device pointer
- * @index: doorbell index
- * @v: value to write
- *
- * Writes @v to the doorbell aperture at the
- * requested doorbell index (CIK).
- */
-void amdgpu_mm_wdoorbell(struct amdgpu_device *adev, u32 index, u32 v)
-{
- if (amdgpu_device_skip_hw_access(adev))
- return;
-
- if (index < adev->doorbell.num_kernel_doorbells) {
- writel(v, adev->doorbell.ptr + index);
- } else {
- DRM_ERROR("writing beyond doorbell aperture: 0x%08x!\n", index);
- }
-}
-
-/**
- * amdgpu_mm_rdoorbell64 - read a doorbell Qword
- *
- * @adev: amdgpu_device pointer
- * @index: doorbell index
- *
- * Returns the value in the doorbell aperture at the
- * requested doorbell index (VEGA10+).
- */
-u64 amdgpu_mm_rdoorbell64(struct amdgpu_device *adev, u32 index)
-{
- if (amdgpu_device_skip_hw_access(adev))
- return 0;
-
- if (index < adev->doorbell.num_kernel_doorbells) {
- return atomic64_read((atomic64_t *)(adev->doorbell.ptr + index));
- } else {
- DRM_ERROR("reading beyond doorbell aperture: 0x%08x!\n", index);
- return 0;
- }
-}
-
-/**
- * amdgpu_mm_wdoorbell64 - write a doorbell Qword
- *
- * @adev: amdgpu_device pointer
- * @index: doorbell index
- * @v: value to write
- *
- * Writes @v to the doorbell aperture at the
- * requested doorbell index (VEGA10+).
- */
-void amdgpu_mm_wdoorbell64(struct amdgpu_device *adev, u32 index, u64 v)
-{
- if (amdgpu_device_skip_hw_access(adev))
- return;
-
- if (index < adev->doorbell.num_kernel_doorbells) {
- atomic64_set((atomic64_t *)(adev->doorbell.ptr + index), v);
- } else {
- DRM_ERROR("writing beyond doorbell aperture: 0x%08x!\n", index);
- }
-}
-
/**
* amdgpu_device_indirect_rreg - read an indirect register
*
@@ -1016,82 +928,6 @@ int amdgpu_device_pci_reset(struct amdgpu_device *adev)
return pci_reset_function(adev->pdev);
}
-/*
- * GPU doorbell aperture helpers function.
- */
-/**
- * amdgpu_device_doorbell_init - Init doorbell driver information.
- *
- * @adev: amdgpu_device pointer
- *
- * Init doorbell driver information (CIK)
- * Returns 0 on success, error on failure.
- */
-static int amdgpu_device_doorbell_init(struct amdgpu_device *adev)
-{
-
- /* No doorbell on SI hardware generation */
- if (adev->asic_type < CHIP_BONAIRE) {
- adev->doorbell.base = 0;
- adev->doorbell.size = 0;
- adev->doorbell.num_kernel_doorbells = 0;
- adev->doorbell.ptr = NULL;
- return 0;
- }
-
- if (pci_resource_flags(adev->pdev, 2) & IORESOURCE_UNSET)
- return -EINVAL;
-
- amdgpu_asic_init_doorbell_index(adev);
-
- /* doorbell bar mapping */
- adev->doorbell.base = pci_resource_start(adev->pdev, 2);
- adev->doorbell.size = pci_resource_len(adev->pdev, 2);
-
- if (adev->enable_mes) {
- adev->doorbell.num_kernel_doorbells =
- adev->doorbell.size / sizeof(u32);
- } else {
- adev->doorbell.num_kernel_doorbells =
- min_t(u32, adev->doorbell.size / sizeof(u32),
- adev->doorbell_index.max_assignment+1);
- if (adev->doorbell.num_kernel_doorbells == 0)
- return -EINVAL;
-
- /* For Vega, reserve and map two pages on doorbell BAR since SDMA
- * paging queue doorbell use the second page. The
- * AMDGPU_DOORBELL64_MAX_ASSIGNMENT definition assumes all the
- * doorbells are in the first page. So with paging queue enabled,
- * the max num_kernel_doorbells should + 1 page (0x400 in dword)
- */
- if (adev->asic_type >= CHIP_VEGA10)
- adev->doorbell.num_kernel_doorbells += 0x400;
- }
-
- adev->doorbell.ptr = ioremap(adev->doorbell.base,
- adev->doorbell.num_kernel_doorbells *
- sizeof(u32));
- if (adev->doorbell.ptr == NULL)
- return -ENOMEM;
-
- return 0;
-}
-
-/**
- * amdgpu_device_doorbell_fini - Tear down doorbell driver information.
- *
- * @adev: amdgpu_device pointer
- *
- * Tear down doorbell driver information (CIK)
- */
-static void amdgpu_device_doorbell_fini(struct amdgpu_device *adev)
-{
- iounmap(adev->doorbell.ptr);
- adev->doorbell.ptr = NULL;
-}
-
-
-
/*
* amdgpu_device_wb_*()
* Writeback is the method by which the GPU updates special pages in memory
@@ -1239,7 +1075,7 @@ int amdgpu_device_resize_fb_bar(struct amdgpu_device *adev)
cmd & ~PCI_COMMAND_MEMORY);
/* Free the VRAM and doorbell BAR, we most likely need to move both. */
- amdgpu_device_doorbell_fini(adev);
+ amdgpu_doorbell_fini(adev);
if (adev->asic_type >= CHIP_BONAIRE)
pci_release_resource(adev->pdev, 2);
@@ -1256,7 +1092,7 @@ int amdgpu_device_resize_fb_bar(struct amdgpu_device *adev)
/* When the doorbell or fb BAR isn't available we have no chance of
* using the device.
*/
- r = amdgpu_device_doorbell_init(adev);
+ r = amdgpu_doorbell_init(adev);
if (r || (pci_resource_flags(adev->pdev, 0) & IORESOURCE_UNSET))
return -ENODEV;
@@ -3712,7 +3548,7 @@ int amdgpu_device_init(struct amdgpu_device *adev,
dev_info(adev->dev, "PCIE atomic ops is not supported\n");
/* doorbell bar mapping and doorbell index init*/
- amdgpu_device_doorbell_init(adev);
+ amdgpu_doorbell_init(adev);
if (amdgpu_emu_mode == 1) {
/* post the asic on emulation mode */
@@ -3942,7 +3778,7 @@ static void amdgpu_device_unmap_mmio(struct amdgpu_device *adev)
unmap_mapping_range(adev->ddev.anon_inode->i_mapping, 0, 0, 1);
/* Unmap all mapped bars - Doorbell, registers and VRAM */
- amdgpu_device_doorbell_fini(adev);
+ amdgpu_doorbell_fini(adev);
iounmap(adev->rmmio);
adev->rmmio = NULL;
@@ -4051,7 +3887,7 @@ void amdgpu_device_fini_sw(struct amdgpu_device *adev)
iounmap(adev->rmmio);
adev->rmmio = NULL;
- amdgpu_device_doorbell_fini(adev);
+ amdgpu_doorbell_fini(adev);
drm_dev_exit(idx);
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h
index 908433ac6cb3..3e77a6b4bd69 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h
@@ -306,6 +306,12 @@ void amdgpu_mm_wdoorbell(struct amdgpu_device *adev, u32 index, u32 v);
u64 amdgpu_mm_rdoorbell64(struct amdgpu_device *adev, u32 index);
void amdgpu_mm_wdoorbell64(struct amdgpu_device *adev, u32 index, u64 v);
+/*
+ * GPU doorbell aperture helpers function.
+ */
+int amdgpu_doorbell_init(struct amdgpu_device *adev);
+void amdgpu_doorbell_fini(struct amdgpu_device *adev);
+
#define RDOORBELL32(index) amdgpu_mm_rdoorbell(adev, (index))
#define WDOORBELL32(index, v) amdgpu_mm_wdoorbell(adev, (index), (v))
#define RDOORBELL64(index) amdgpu_mm_rdoorbell64(adev, (index))
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c
new file mode 100644
index 000000000000..64fec954815d
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c
@@ -0,0 +1,183 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2022 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include "amdgpu.h"
+
+/**
+ * amdgpu_mm_rdoorbell - read a doorbell dword
+ *
+ * @adev: amdgpu_device pointer
+ * @index: doorbell index
+ *
+ * Returns the value in the doorbell aperture at the
+ * requested doorbell index (CIK).
+ */
+u32 amdgpu_mm_rdoorbell(struct amdgpu_device *adev, u32 index)
+{
+ if (amdgpu_device_skip_hw_access(adev))
+ return 0;
+
+ if (index < adev->doorbell.num_kernel_doorbells)
+ return readl(adev->doorbell.ptr + index);
+
+ DRM_ERROR("reading beyond doorbell aperture: 0x%08x!\n", index);
+ return 0;
+}
+
+/**
+ * amdgpu_mm_wdoorbell - write a doorbell dword
+ *
+ * @adev: amdgpu_device pointer
+ * @index: doorbell index
+ * @v: value to write
+ *
+ * Writes @v to the doorbell aperture at the
+ * requested doorbell index (CIK).
+ */
+void amdgpu_mm_wdoorbell(struct amdgpu_device *adev, u32 index, u32 v)
+{
+ if (amdgpu_device_skip_hw_access(adev))
+ return;
+
+ if (index < adev->doorbell.num_kernel_doorbells)
+ writel(v, adev->doorbell.ptr + index);
+ else
+ DRM_ERROR("writing beyond doorbell aperture: 0x%08x!\n", index);
+}
+
+/**
+ * amdgpu_mm_rdoorbell64 - read a doorbell Qword
+ *
+ * @adev: amdgpu_device pointer
+ * @index: doorbell index
+ *
+ * Returns the value in the doorbell aperture at the
+ * requested doorbell index (VEGA10+).
+ */
+u64 amdgpu_mm_rdoorbell64(struct amdgpu_device *adev, u32 index)
+{
+ if (amdgpu_device_skip_hw_access(adev))
+ return 0;
+
+ if (index < adev->doorbell.num_kernel_doorbells)
+ return atomic64_read((atomic64_t *)(adev->doorbell.ptr + index));
+
+ DRM_ERROR("reading beyond doorbell aperture: 0x%08x!\n", index);
+ return 0;
+}
+
+/**
+ * amdgpu_mm_wdoorbell64 - write a doorbell Qword
+ *
+ * @adev: amdgpu_device pointer
+ * @index: doorbell index
+ * @v: value to write
+ *
+ * Writes @v to the doorbell aperture at the
+ * requested doorbell index (VEGA10+).
+ */
+void amdgpu_mm_wdoorbell64(struct amdgpu_device *adev, u32 index, u64 v)
+{
+ if (amdgpu_device_skip_hw_access(adev))
+ return;
+
+ if (index < adev->doorbell.num_kernel_doorbells)
+ atomic64_set((atomic64_t *)(adev->doorbell.ptr + index), v);
+ else
+ DRM_ERROR("writing beyond doorbell aperture: 0x%08x!\n", index);
+}
+
+/*
+ * GPU doorbell aperture helpers function.
+ */
+/**
+ * amdgpu_doorbell_init - Init doorbell driver information.
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Init doorbell driver information (CIK)
+ * Returns 0 on success, error on failure.
+ */
+int amdgpu_doorbell_init(struct amdgpu_device *adev)
+{
+
+ /* No doorbell on SI hardware generation */
+ if (adev->asic_type < CHIP_BONAIRE) {
+ adev->doorbell.base = 0;
+ adev->doorbell.size = 0;
+ adev->doorbell.num_kernel_doorbells = 0;
+ adev->doorbell.ptr = NULL;
+ return 0;
+ }
+
+ if (pci_resource_flags(adev->pdev, 2) & IORESOURCE_UNSET)
+ return -EINVAL;
+
+ amdgpu_asic_init_doorbell_index(adev);
+
+ /* doorbell bar mapping */
+ adev->doorbell.base = pci_resource_start(adev->pdev, 2);
+ adev->doorbell.size = pci_resource_len(adev->pdev, 2);
+
+ if (adev->enable_mes) {
+ adev->doorbell.num_kernel_doorbells =
+ adev->doorbell.size / sizeof(u32);
+ } else {
+ adev->doorbell.num_kernel_doorbells =
+ min_t(u32, adev->doorbell.size / sizeof(u32),
+ adev->doorbell_index.max_assignment+1);
+ if (adev->doorbell.num_kernel_doorbells == 0)
+ return -EINVAL;
+
+ /* For Vega, reserve and map two pages on doorbell BAR since SDMA
+ * paging queue doorbell use the second page. The
+ * AMDGPU_DOORBELL64_MAX_ASSIGNMENT definition assumes all the
+ * doorbells are in the first page. So with paging queue enabled,
+ * the max num_kernel_doorbells should + 1 page (0x400 in dword)
+ */
+ if (adev->asic_type >= CHIP_VEGA10)
+ adev->doorbell.num_kernel_doorbells += 0x400;
+ }
+
+ adev->doorbell.ptr = ioremap(adev->doorbell.base,
+ adev->doorbell.num_kernel_doorbells *
+ sizeof(u32));
+ if (adev->doorbell.ptr == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+
+/**
+ * amdgpu_doorbell_fini - Tear down doorbell driver information.
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Tear down doorbell driver information (CIK)
+ */
+void amdgpu_doorbell_fini(struct amdgpu_device *adev)
+{
+ iounmap(adev->doorbell.ptr);
+ adev->doorbell.ptr = NULL;
+}
--
2.40.0
