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drm/radeon/kms: add functions to get current pcie lanes
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Currently unused.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Alex Deucher authored and Dave Airlie committed Feb 8, 2010
1 parent c913e23 commit c836a41
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Showing 3 changed files with 44 additions and 0 deletions.
31 changes: 31 additions & 0 deletions drivers/gpu/drm/radeon/r300.c
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Original file line number Diff line number Diff line change
Expand Up @@ -580,6 +580,37 @@ void rv370_set_pcie_lanes(struct radeon_device *rdev, int lanes)

}

int rv370_get_pcie_lanes(struct radeon_device *rdev)
{
u32 link_width_cntl;

if (rdev->flags & RADEON_IS_IGP)
return 0;

if (!(rdev->flags & RADEON_IS_PCIE))
return 0;

/* FIXME wait for idle */

link_width_cntl = RREG32_PCIE(RADEON_PCIE_LC_LINK_WIDTH_CNTL);

switch ((link_width_cntl & RADEON_PCIE_LC_LINK_WIDTH_RD_MASK) >> RADEON_PCIE_LC_LINK_WIDTH_RD_SHIFT) {
case RADEON_PCIE_LC_LINK_WIDTH_X0:
return 0;
case RADEON_PCIE_LC_LINK_WIDTH_X1:
return 1;
case RADEON_PCIE_LC_LINK_WIDTH_X2:
return 2;
case RADEON_PCIE_LC_LINK_WIDTH_X4:
return 4;
case RADEON_PCIE_LC_LINK_WIDTH_X8:
return 8;
case RADEON_PCIE_LC_LINK_WIDTH_X16:
default:
return 16;
}
}

#if defined(CONFIG_DEBUG_FS)
static int rv370_debugfs_pcie_gart_info(struct seq_file *m, void *data)
{
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2 changes: 2 additions & 0 deletions drivers/gpu/drm/radeon/radeon.h
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Original file line number Diff line number Diff line change
Expand Up @@ -678,6 +678,7 @@ struct radeon_asic {
void (*set_engine_clock)(struct radeon_device *rdev, uint32_t eng_clock);
uint32_t (*get_memory_clock)(struct radeon_device *rdev);
void (*set_memory_clock)(struct radeon_device *rdev, uint32_t mem_clock);
int (*get_pcie_lanes)(struct radeon_device *rdev);
void (*set_pcie_lanes)(struct radeon_device *rdev, int lanes);
void (*set_clock_gating)(struct radeon_device *rdev, int enable);
int (*set_surface_reg)(struct radeon_device *rdev, int reg,
Expand Down Expand Up @@ -1044,6 +1045,7 @@ static inline void radeon_ring_write(struct radeon_device *rdev, uint32_t v)
#define radeon_set_engine_clock(rdev, e) (rdev)->asic->set_engine_clock((rdev), (e))
#define radeon_get_memory_clock(rdev) (rdev)->asic->get_memory_clock((rdev))
#define radeon_set_memory_clock(rdev, e) (rdev)->asic->set_memory_clock((rdev), (e))
#define radeon_get_pcie_lanes(rdev) (rdev)->asic->get_pcie_lanes((rdev))
#define radeon_set_pcie_lanes(rdev, l) (rdev)->asic->set_pcie_lanes((rdev), (l))
#define radeon_set_clock_gating(rdev, e) (rdev)->asic->set_clock_gating((rdev), (e))
#define radeon_set_surface_reg(rdev, r, f, p, o, s) ((rdev)->asic->set_surface_reg((rdev), (r), (f), (p), (o), (s)))
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11 changes: 11 additions & 0 deletions drivers/gpu/drm/radeon/radeon_asic.h
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Original file line number Diff line number Diff line change
Expand Up @@ -108,6 +108,7 @@ static struct radeon_asic r100_asic = {
.set_engine_clock = &radeon_legacy_set_engine_clock,
.get_memory_clock = &radeon_legacy_get_memory_clock,
.set_memory_clock = NULL,
.get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = &radeon_legacy_set_clock_gating,
.set_surface_reg = r100_set_surface_reg,
Expand Down Expand Up @@ -138,6 +139,7 @@ extern int rv370_pcie_gart_set_page(struct radeon_device *rdev, int i, uint64_t
extern uint32_t rv370_pcie_rreg(struct radeon_device *rdev, uint32_t reg);
extern void rv370_pcie_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v);
extern void rv370_set_pcie_lanes(struct radeon_device *rdev, int lanes);
extern int rv370_get_pcie_lanes(struct radeon_device *rdev);
extern int r300_copy_dma(struct radeon_device *rdev,
uint64_t src_offset,
uint64_t dst_offset,
Expand Down Expand Up @@ -168,6 +170,7 @@ static struct radeon_asic r300_asic = {
.set_engine_clock = &radeon_legacy_set_engine_clock,
.get_memory_clock = &radeon_legacy_get_memory_clock,
.set_memory_clock = NULL,
.get_pcie_lanes = &rv370_get_pcie_lanes,
.set_pcie_lanes = &rv370_set_pcie_lanes,
.set_clock_gating = &radeon_legacy_set_clock_gating,
.set_surface_reg = r100_set_surface_reg,
Expand Down Expand Up @@ -212,6 +215,7 @@ static struct radeon_asic r420_asic = {
.set_engine_clock = &radeon_atom_set_engine_clock,
.get_memory_clock = &radeon_atom_get_memory_clock,
.set_memory_clock = &radeon_atom_set_memory_clock,
.get_pcie_lanes = &rv370_get_pcie_lanes,
.set_pcie_lanes = &rv370_set_pcie_lanes,
.set_clock_gating = &radeon_atom_set_clock_gating,
.set_surface_reg = r100_set_surface_reg,
Expand Down Expand Up @@ -261,6 +265,7 @@ static struct radeon_asic rs400_asic = {
.set_engine_clock = &radeon_legacy_set_engine_clock,
.get_memory_clock = &radeon_legacy_get_memory_clock,
.set_memory_clock = NULL,
.get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = &radeon_legacy_set_clock_gating,
.set_surface_reg = r100_set_surface_reg,
Expand Down Expand Up @@ -320,6 +325,7 @@ static struct radeon_asic rs600_asic = {
.set_engine_clock = &radeon_atom_set_engine_clock,
.get_memory_clock = &radeon_atom_get_memory_clock,
.set_memory_clock = &radeon_atom_set_memory_clock,
.get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = &radeon_atom_set_clock_gating,
.bandwidth_update = &rs600_bandwidth_update,
Expand Down Expand Up @@ -366,6 +372,7 @@ static struct radeon_asic rs690_asic = {
.set_engine_clock = &radeon_atom_set_engine_clock,
.get_memory_clock = &radeon_atom_get_memory_clock,
.set_memory_clock = &radeon_atom_set_memory_clock,
.get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = &radeon_atom_set_clock_gating,
.set_surface_reg = r100_set_surface_reg,
Expand Down Expand Up @@ -418,6 +425,7 @@ static struct radeon_asic rv515_asic = {
.set_engine_clock = &radeon_atom_set_engine_clock,
.get_memory_clock = &radeon_atom_get_memory_clock,
.set_memory_clock = &radeon_atom_set_memory_clock,
.get_pcie_lanes = &rv370_get_pcie_lanes,
.set_pcie_lanes = &rv370_set_pcie_lanes,
.set_clock_gating = &radeon_atom_set_clock_gating,
.set_surface_reg = r100_set_surface_reg,
Expand Down Expand Up @@ -461,6 +469,7 @@ static struct radeon_asic r520_asic = {
.set_engine_clock = &radeon_atom_set_engine_clock,
.get_memory_clock = &radeon_atom_get_memory_clock,
.set_memory_clock = &radeon_atom_set_memory_clock,
.get_pcie_lanes = &rv370_get_pcie_lanes,
.set_pcie_lanes = &rv370_set_pcie_lanes,
.set_clock_gating = &radeon_atom_set_clock_gating,
.set_surface_reg = r100_set_surface_reg,
Expand Down Expand Up @@ -538,6 +547,7 @@ static struct radeon_asic r600_asic = {
.set_engine_clock = &radeon_atom_set_engine_clock,
.get_memory_clock = &radeon_atom_get_memory_clock,
.set_memory_clock = &radeon_atom_set_memory_clock,
.get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = &radeon_atom_set_clock_gating,
.set_surface_reg = r600_set_surface_reg,
Expand Down Expand Up @@ -583,6 +593,7 @@ static struct radeon_asic rv770_asic = {
.set_engine_clock = &radeon_atom_set_engine_clock,
.get_memory_clock = &radeon_atom_get_memory_clock,
.set_memory_clock = &radeon_atom_set_memory_clock,
.get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = &radeon_atom_set_clock_gating,
.set_surface_reg = r600_set_surface_reg,
Expand Down

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