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From: Darren Salt <devspam@moreofthesa.me.uk>
To: amd-gfx@lists.freedesktop.org
Cc: Darren Salt <devspam@moreofthesa.me.uk>
Subject: [PATCH 4/7] amdgpu: module option controlling whether BAR0 resizing is done
Date: Fri, 11 Dec 2020 00:55:03 +0000	[thread overview]
Message-ID: <20201211005506.4554-5-devspam@moreofthesa.me.uk> (raw)
In-Reply-To: <20201211005506.4554-1-devspam@moreofthesa.me.uk>

---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h        | 1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 +++
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c    | 9 +++++++++
 3 files changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index c228e7470d51..2efce7fa6a4b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -201,6 +201,7 @@ static const bool __maybe_unused no_system_mem_limit;
 
 extern int amdgpu_tmz;
 extern int amdgpu_reset_method;
+extern bool amdgpu_resize_bar;
 
 #ifdef CONFIG_DRM_AMDGPU_SI
 extern int amdgpu_si_support;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 1e99ca62a4d2..292796e9f83d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1115,6 +1115,9 @@ int amdgpu_device_resize_fb_bar(struct amdgpu_device *adev)
 	int r;
 	bool nospc = false;
 
+	if (!amdgpu_resize_bar)
+		return 0;
+
 	/* Bypass for VF */
 	if (amdgpu_sriov_vf(adev))
 		return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index cac2724e7615..6df33df74775 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -161,6 +161,7 @@ int amdgpu_force_asic_type = -1;
 int amdgpu_tmz;
 int amdgpu_reset_method = -1; /* auto */
 int amdgpu_num_kcq = -1;
+bool amdgpu_resize_bar = true;
 
 struct amdgpu_mgpu_info mgpu_info = {
 	.mutex = __MUTEX_INITIALIZER(mgpu_info.mutex),
@@ -807,6 +808,14 @@ module_param_named(bad_page_threshold, amdgpu_bad_page_threshold, int, 0444);
 MODULE_PARM_DESC(num_kcq, "number of kernel compute queue user want to setup (8 if set to greater than 8 or less than 0, only affect gfx 8+)");
 module_param_named(num_kcq, amdgpu_num_kcq, int, 0444);
 
+/**
+ * DOC: resize_bar (bool)
+ * Control whether FB BAR should be resized.
+ * Enabled by default.
+ */
+module_param_named(resize_bar, amdgpu_resize_bar, bool, 0444);
+MODULE_PARM_DESC(resize_bar, "Controls whether the FB BAR should be resized (default = true).");
+
 static const struct pci_device_id pciidlist[] = {
 #ifdef  CONFIG_DRM_AMDGPU_SI
 	{0x1002, 0x6780, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_TAHITI},
-- 
2.20.1

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  parent reply	other threads:[~2020-12-11  0:55 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-11  0:54 [PATCH 0/7] amdgpu, pci: improved BAR resizing support Darren Salt
2020-12-11  0:55 ` [PATCH 1/7] pci: export PCI BAR size-reading functions Darren Salt
2020-12-11  9:07   ` Christian König
2020-12-11  0:55 ` [PATCH 2/7] pci: add BAR bytes->size helper & expose size->bytes helper Darren Salt
2020-12-11  0:55 ` [PATCH 3/7] amdgpu: resize BAR0 to the maximum available size, even if it doesn't cover VRAM (v2) Darren Salt
2020-12-11 16:42   ` Christian König
2020-12-11 17:31     ` Darren Salt
2020-12-11 19:06       ` Alex Deucher
2020-12-14  8:12       ` Christian König
2020-12-14 15:46         ` Darren Salt
2020-12-14 20:44           ` Christian König
2020-12-11  0:55 ` Darren Salt [this message]
2020-12-11  9:09   ` [PATCH 4/7] amdgpu: module option controlling whether BAR0 resizing is done Christian König
2020-12-11  0:55 ` [PATCH 5/7] amdgpu: limit maximum FB BAR size when attempting to enlarge Darren Salt
2020-12-11  0:55 ` [PATCH 6/7] pci: allow for overriding the list of advertised BAR sizes Darren Salt
2020-12-11  0:55 ` [PATCH 7/7] amdgpu: allow overriding of the GPU's list of supported " Darren Salt

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