[PATCH v2 1/2] drm/i915: Use of BARs names instead of numbers
Piorkowski, Piotr
piotr.piorkowski at intel.com
Wed Jul 27 17:13:16 UTC 2022
From: Piotr Piórkowski <piotr.piorkowski at intel.com>
At the moment, when we refer to some PCI BAR we use the number of
this BAR in the code. The meaning of BARs between different platforms
may be different. Therefore, in order to organize the code,
let's start using defined names instead of numbers.
v2: Add lost header in cfg_space.c
Signed-off-by: Piotr Piórkowski <piotr.piorkowski at intel.com>
Cc: Jani Nikula <jani.nikula at linux.intel.com>
Cc: Lucas De Marchi <lucas.demarchi at intel.com>
Cc: Roper, Matthew D <matthew.d.roper at intel.com>
---
drivers/gpu/drm/i915/display/intel_lpe_audio.c | 5 +++--
drivers/gpu/drm/i915/gem/i915_gem_stolen.c | 7 ++++---
drivers/gpu/drm/i915/gt/intel_ggtt.c | 9 +++++----
drivers/gpu/drm/i915/gt/intel_gt.c | 3 ++-
drivers/gpu/drm/i915/gt/intel_region_lmem.c | 13 ++++++-------
drivers/gpu/drm/i915/gvt/cfg_space.c | 5 +++--
drivers/gpu/drm/i915/intel_pci_config.h | 7 +++++++
7 files changed, 30 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_lpe_audio.c b/drivers/gpu/drm/i915/display/intel_lpe_audio.c
index 4970bf146c4a..1e18696aaecf 100644
--- a/drivers/gpu/drm/i915/display/intel_lpe_audio.c
+++ b/drivers/gpu/drm/i915/display/intel_lpe_audio.c
@@ -73,6 +73,7 @@
#include "i915_drv.h"
#include "intel_de.h"
#include "intel_lpe_audio.h"
+#include "intel_pci_config.h"
#define HAS_LPE_AUDIO(dev_priv) ((dev_priv)->audio.lpe.platdev != NULL)
@@ -100,9 +101,9 @@ lpe_audio_platdev_create(struct drm_i915_private *dev_priv)
rsc[0].flags = IORESOURCE_IRQ;
rsc[0].name = "hdmi-lpe-audio-irq";
- rsc[1].start = pci_resource_start(pdev, 0) +
+ rsc[1].start = pci_resource_start(pdev, GTTMMADR_BAR) +
I915_HDMI_LPE_AUDIO_BASE;
- rsc[1].end = pci_resource_start(pdev, 0) +
+ rsc[1].end = pci_resource_start(pdev, GTTMMADR_BAR) +
I915_HDMI_LPE_AUDIO_BASE + I915_HDMI_LPE_AUDIO_SIZE - 1;
rsc[1].flags = IORESOURCE_MEM;
rsc[1].name = "hdmi-lpe-audio-mmio";
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
index 166d0a4b9e8c..c369cfd185bc 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
@@ -22,6 +22,7 @@
#include "i915_utils.h"
#include "i915_vgpu.h"
#include "intel_mchbar_regs.h"
+#include "intel_pci_config.h"
/*
* The BIOS typically reserves some of the system's memory for the exclusive
@@ -830,7 +831,7 @@ i915_gem_stolen_lmem_setup(struct drm_i915_private *i915, u16 type,
/* Use DSM base address instead for stolen memory */
dsm_base = intel_uncore_read64(uncore, GEN12_DSMBASE);
if (IS_DG1(uncore->i915)) {
- lmem_size = pci_resource_len(pdev, 2);
+ lmem_size = pci_resource_len(pdev, GEN12_LMEM_BAR);
if (WARN_ON(lmem_size < dsm_base))
return ERR_PTR(-ENODEV);
} else {
@@ -842,11 +843,11 @@ i915_gem_stolen_lmem_setup(struct drm_i915_private *i915, u16 type,
}
dsm_size = lmem_size - dsm_base;
- if (pci_resource_len(pdev, 2) < lmem_size) {
+ if (pci_resource_len(pdev, GEN12_LMEM_BAR) < lmem_size) {
io_start = 0;
io_size = 0;
} else {
- io_start = pci_resource_start(pdev, 2) + dsm_base;
+ io_start = pci_resource_start(pdev, GEN12_LMEM_BAR) + dsm_base;
io_size = dsm_size;
}
diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt.c b/drivers/gpu/drm/i915/gt/intel_ggtt.c
index 15a915bb4088..8214e07a0f5b 100644
--- a/drivers/gpu/drm/i915/gt/intel_ggtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_ggtt.c
@@ -16,6 +16,7 @@
#include "intel_ggtt_gmch.h"
#include "intel_gt.h"
#include "intel_gt_regs.h"
+#include "intel_pci_config.h"
#include "i915_drv.h"
#include "i915_scatterlist.h"
#include "i915_utils.h"
@@ -869,8 +870,8 @@ static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size)
u32 pte_flags;
int ret;
- GEM_WARN_ON(pci_resource_len(pdev, 0) != gen6_gttmmadr_size(i915));
- phys_addr = pci_resource_start(pdev, 0) + gen6_gttadr_offset(i915);
+ GEM_WARN_ON(pci_resource_len(pdev, GTTMMADR_BAR) != gen6_gttmmadr_size(i915));
+ phys_addr = pci_resource_start(pdev, GTTMMADR_BAR) + gen6_gttadr_offset(i915);
/*
* On BXT+/ICL+ writes larger than 64 bit to the GTT pagetable range
@@ -930,7 +931,7 @@ static int gen8_gmch_probe(struct i915_ggtt *ggtt)
u16 snb_gmch_ctl;
if (!HAS_LMEM(i915)) {
- ggtt->gmadr = pci_resource(pdev, 2);
+ ggtt->gmadr = pci_resource(pdev, GTT_APERTURE_BAR);
ggtt->mappable_end = resource_size(&ggtt->gmadr);
}
@@ -1084,7 +1085,7 @@ static int gen6_gmch_probe(struct i915_ggtt *ggtt)
unsigned int size;
u16 snb_gmch_ctl;
- ggtt->gmadr = pci_resource(pdev, 2);
+ ggtt->gmadr = pci_resource(pdev, GTT_APERTURE_BAR);
ggtt->mappable_end = resource_size(&ggtt->gmadr);
/*
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index 68c2b0d8f187..7b059fdf8cbc 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -24,6 +24,7 @@
#include "intel_gt_requests.h"
#include "intel_migrate.h"
#include "intel_mocs.h"
+#include "intel_pci_config.h"
#include "intel_pm.h"
#include "intel_rc6.h"
#include "intel_renderstate.h"
@@ -827,7 +828,7 @@ int intel_gt_probe_all(struct drm_i915_private *i915)
unsigned int mmio_bar;
int ret;
- mmio_bar = GRAPHICS_VER(i915) == 2 ? 1 : 0;
+ mmio_bar = GRAPHICS_VER(i915) == 2 ? GEN2_GTTMMADR_BAR : GTTMMADR_BAR;
phys_addr = pci_resource_start(pdev, mmio_bar);
/*
diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c
index 6e90032e12e9..0b78a5f3a996 100644
--- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c
+++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c
@@ -6,6 +6,7 @@
#include "i915_drv.h"
#include "i915_reg.h"
#include "intel_memory_region.h"
+#include "intel_pci_config.h"
#include "intel_region_lmem.h"
#include "intel_region_ttm.h"
#include "gem/i915_gem_lmem.h"
@@ -44,7 +45,6 @@ _resize_bar(struct drm_i915_private *i915, int resno, resource_size_t size)
drm_info(&i915->drm, "BAR%d resized to %dM\n", resno, 1 << bar_size);
}
-#define LMEM_BAR_NUM 2
static void i915_resize_lmem_bar(struct drm_i915_private *i915, resource_size_t lmem_size)
{
struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
@@ -55,15 +55,14 @@ static void i915_resize_lmem_bar(struct drm_i915_private *i915, resource_size_t
u32 pci_cmd;
int i;
- current_size = roundup_pow_of_two(pci_resource_len(pdev, LMEM_BAR_NUM));
+ current_size = roundup_pow_of_two(pci_resource_len(pdev, GEN12_LMEM_BAR));
if (i915->params.lmem_bar_size) {
u32 bar_sizes;
rebar_size = i915->params.lmem_bar_size *
(resource_size_t)SZ_1M;
- bar_sizes = pci_rebar_get_possible_sizes(pdev,
- LMEM_BAR_NUM);
+ bar_sizes = pci_rebar_get_possible_sizes(pdev, GEN12_LMEM_BAR);
if (rebar_size == current_size)
return;
@@ -106,7 +105,7 @@ static void i915_resize_lmem_bar(struct drm_i915_private *i915, resource_size_t
pci_write_config_dword(pdev, PCI_COMMAND,
pci_cmd & ~PCI_COMMAND_MEMORY);
- _resize_bar(i915, LMEM_BAR_NUM, rebar_size);
+ _resize_bar(i915, GEN12_LMEM_BAR, rebar_size);
pci_assign_unassigned_bus_resources(pdev->bus);
pci_write_config_dword(pdev, PCI_COMMAND, pci_cmd);
@@ -232,8 +231,8 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt)
mul_u32_u32(i915->params.lmem_size, SZ_1M));
}
- io_start = pci_resource_start(pdev, 2);
- io_size = min(pci_resource_len(pdev, 2), lmem_size);
+ io_start = pci_resource_start(pdev, GEN12_LMEM_BAR);
+ io_size = min(pci_resource_len(pdev, GEN12_LMEM_BAR), lmem_size);
if (!io_size)
return ERR_PTR(-EIO);
diff --git a/drivers/gpu/drm/i915/gvt/cfg_space.c b/drivers/gpu/drm/i915/gvt/cfg_space.c
index dad3a6054335..eef3bba8a41b 100644
--- a/drivers/gpu/drm/i915/gvt/cfg_space.c
+++ b/drivers/gpu/drm/i915/gvt/cfg_space.c
@@ -33,6 +33,7 @@
#include "i915_drv.h"
#include "gvt.h"
+#include "intel_pci_config.h"
enum {
INTEL_GVT_PCI_BAR_GTTMMIO = 0,
@@ -353,9 +354,9 @@ void intel_vgpu_init_cfg_space(struct intel_vgpu *vgpu,
memset(vgpu_cfg_space(vgpu) + INTEL_GVT_PCI_OPREGION, 0, 4);
vgpu->cfg_space.bar[INTEL_GVT_PCI_BAR_GTTMMIO].size =
- pci_resource_len(pdev, 0);
+ pci_resource_len(pdev, GTTMMADR_BAR);
vgpu->cfg_space.bar[INTEL_GVT_PCI_BAR_APERTURE].size =
- pci_resource_len(pdev, 2);
+ pci_resource_len(pdev, GTT_APERTURE_BAR);
memset(vgpu_cfg_space(vgpu) + PCI_ROM_ADDRESS, 0, 4);
diff --git a/drivers/gpu/drm/i915/intel_pci_config.h b/drivers/gpu/drm/i915/intel_pci_config.h
index 12cd9d4f23de..4977a524ce6f 100644
--- a/drivers/gpu/drm/i915/intel_pci_config.h
+++ b/drivers/gpu/drm/i915/intel_pci_config.h
@@ -6,6 +6,13 @@
#ifndef __INTEL_PCI_CONFIG_H__
#define __INTEL_PCI_CONFIG_H__
+/* PCI BARs */
+#define GTTMMADR_BAR 0
+#define GEN2_GTTMMADR_BAR 1
+#define GFXMEM_BAR 2
+#define GTT_APERTURE_BAR GFXMEM_BAR
+#define GEN12_LMEM_BAR GFXMEM_BAR
+
/* BSM in include/drm/i915_drm.h */
#define MCHBAR_I915 0x44
--
2.25.1
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