diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/r600.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/r600.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c index 279794c3..6b50716 100644 --- a/drivers/gpu/drm/radeon/r600.c +++ b/drivers/gpu/drm/radeon/r600.c @@ -94,6 +94,7 @@ int r600_mc_wait_for_idle(struct radeon_device *rdev); void r600_gpu_init(struct radeon_device *rdev); void r600_fini(struct radeon_device *rdev); void r600_irq_disable(struct radeon_device *rdev); +static void r600_pcie_gen2_enable(struct radeon_device *rdev); /* get temperature in millidegrees */ u32 rv6xx_get_temp(struct radeon_device *rdev) @@ -2379,6 +2380,9 @@ int r600_startup(struct radeon_device *rdev) { int r; + /* enable pcie gen2 link */ + r600_pcie_gen2_enable(rdev); + if (!rdev->me_fw || !rdev->pfp_fw || !rdev->rlc_fw) { r = r600_init_microcode(rdev); if (r) { @@ -3531,3 +3535,219 @@ void r600_ioctl_wait_idle(struct radeon_device *rdev, struct radeon_bo *bo) } else WREG32(R_005480_HDP_MEM_COHERENCY_FLUSH_CNTL, 0x1); } + +void r600_set_pcie_lanes(struct radeon_device *rdev, int lanes) +{ + u32 link_width_cntl, mask, target_reg; + + if (rdev->flags & RADEON_IS_IGP) + return; + + if (!(rdev->flags & RADEON_IS_PCIE)) + return; + + /* x2 cards have a special sequence */ + if (ASIC_IS_X2(rdev)) + return; + + /* FIXME wait for idle */ + + switch (lanes) { + case 0: + mask = RADEON_PCIE_LC_LINK_WIDTH_X0; + break; + case 1: + mask = RADEON_PCIE_LC_LINK_WIDTH_X1; + break; + case 2: + mask = RADEON_PCIE_LC_LINK_WIDTH_X2; + break; + case 4: + mask = RADEON_PCIE_LC_LINK_WIDTH_X4; + break; + case 8: + mask = RADEON_PCIE_LC_LINK_WIDTH_X8; + break; + case 12: + mask = RADEON_PCIE_LC_LINK_WIDTH_X12; + break; + case 16: + default: + mask = RADEON_PCIE_LC_LINK_WIDTH_X16; + break; + } + + link_width_cntl = RREG32_PCIE_P(RADEON_PCIE_LC_LINK_WIDTH_CNTL); + + if ((link_width_cntl & RADEON_PCIE_LC_LINK_WIDTH_RD_MASK) == + (mask << RADEON_PCIE_LC_LINK_WIDTH_RD_SHIFT)) + return; + + if (link_width_cntl & R600_PCIE_LC_UPCONFIGURE_DIS) + return; + + link_width_cntl &= ~(RADEON_PCIE_LC_LINK_WIDTH_MASK | + RADEON_PCIE_LC_RECONFIG_NOW | + R600_PCIE_LC_RENEGOTIATE_EN | + R600_PCIE_LC_RECONFIG_ARC_MISSING_ESCAPE); + link_width_cntl |= mask; + + WREG32_PCIE_P(RADEON_PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl); + + /* some northbridges can renegotiate the link rather than requiring + * a complete re-config. + * e.g., AMD 780/790 northbridges (pci ids: 0x5956, 0x5957, 0x5958, etc.) + */ + if (link_width_cntl & R600_PCIE_LC_RENEGOTIATION_SUPPORT) + link_width_cntl |= R600_PCIE_LC_RENEGOTIATE_EN | R600_PCIE_LC_UPCONFIGURE_SUPPORT; + else + link_width_cntl |= R600_PCIE_LC_RECONFIG_ARC_MISSING_ESCAPE; + + WREG32_PCIE_P(RADEON_PCIE_LC_LINK_WIDTH_CNTL, (link_width_cntl | + RADEON_PCIE_LC_RECONFIG_NOW)); + + if (rdev->family >= CHIP_RV770) + target_reg = R700_TARGET_AND_CURRENT_PROFILE_INDEX; + else + target_reg = R600_TARGET_AND_CURRENT_PROFILE_INDEX; + + /* wait for lane set to complete */ + link_width_cntl = RREG32(target_reg); + while (link_width_cntl == 0xffffffff) + link_width_cntl = RREG32(target_reg); + +} + +int r600_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; + + /* x2 cards have a special sequence */ + if (ASIC_IS_X2(rdev)) + return 0; + + /* FIXME wait for idle */ + + link_width_cntl = RREG32_PCIE_P(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; + } +} + +static void r600_pcie_gen2_enable(struct radeon_device *rdev) +{ + u32 link_width_cntl, lanes, speed_cntl, training_cntl, tmp; + u16 link_cntl2; + + if (rdev->flags & RADEON_IS_IGP) + return; + + if (!(rdev->flags & RADEON_IS_PCIE)) + return; + + /* x2 cards have a special sequence */ + if (ASIC_IS_X2(rdev)) + return; + + /* only RV6xx+ chips are supported */ + if (rdev->family <= CHIP_R600) + return; + + /* 55 nm r6xx asics */ + if ((rdev->family == CHIP_RV670) || + (rdev->family == CHIP_RV620) || + (rdev->family == CHIP_RV635)) { + /* advertise upconfig capability */ + link_width_cntl = RREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL); + link_width_cntl &= ~LC_UPCONFIGURE_DIS; + WREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl); + link_width_cntl = RREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL); + if (link_width_cntl & LC_RENEGOTIATION_SUPPORT) { + lanes = (link_width_cntl & LC_LINK_WIDTH_RD_MASK) >> LC_LINK_WIDTH_RD_SHIFT; + link_width_cntl &= ~(LC_LINK_WIDTH_MASK | + LC_RECONFIG_ARC_MISSING_ESCAPE); + link_width_cntl |= lanes | LC_RECONFIG_NOW | LC_RENEGOTIATE_EN; + WREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl); + } else { + link_width_cntl |= LC_UPCONFIGURE_DIS; + WREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl); + } + } + + speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL); + if ((speed_cntl & LC_OTHER_SIDE_EVER_SENT_GEN2) && + (speed_cntl & LC_OTHER_SIDE_SUPPORTS_GEN2)) { + + /* 55 nm r6xx asics */ + if ((rdev->family == CHIP_RV670) || + (rdev->family == CHIP_RV620) || + (rdev->family == CHIP_RV635)) { + WREG32(MM_CFGREGS_CNTL, 0x8); + link_cntl2 = RREG32(0x4088); + WREG32(MM_CFGREGS_CNTL, 0); + /* not supported yet */ + if (link_cntl2 & SELECTABLE_DEEMPHASIS) + return; + } + + speed_cntl &= ~LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_MASK; + speed_cntl |= (0x3 << LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_SHIFT); + speed_cntl &= ~LC_VOLTAGE_TIMER_SEL_MASK; + speed_cntl &= ~LC_FORCE_DIS_HW_SPEED_CHANGE; + speed_cntl |= LC_FORCE_EN_HW_SPEED_CHANGE; + WREG32_PCIE_P(PCIE_LC_SPEED_CNTL, speed_cntl); + + tmp = RREG32(0x541c); + WREG32(0x541c, tmp | 0x8); + WREG32(MM_CFGREGS_CNTL, MM_WR_TO_CFG_EN); + link_cntl2 = RREG16(0x4088); + link_cntl2 &= ~TARGET_LINK_SPEED_MASK; + link_cntl2 |= 0x2; + WREG16(0x4088, link_cntl2); + WREG32(MM_CFGREGS_CNTL, 0); + + if ((rdev->family == CHIP_RV670) || + (rdev->family == CHIP_RV620) || + (rdev->family == CHIP_RV635)) { + training_cntl = RREG32_PCIE_P(PCIE_LC_TRAINING_CNTL); + training_cntl &= ~LC_POINT_7_PLUS_EN; + WREG32_PCIE_P(PCIE_LC_TRAINING_CNTL, training_cntl); + } else { + speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL); + speed_cntl &= ~LC_TARGET_LINK_SPEED_OVERRIDE_EN; + WREG32_PCIE_P(PCIE_LC_SPEED_CNTL, speed_cntl); + } + + speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL); + speed_cntl |= LC_GEN2_EN_STRAP; + WREG32_PCIE_P(PCIE_LC_SPEED_CNTL, speed_cntl); + + } else { + link_width_cntl = RREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL); + /* XXX: only disable it if gen1 bridge vendor == 0x111d or 0x1106 */ + if (1) + link_width_cntl |= LC_UPCONFIGURE_DIS; + else + link_width_cntl &= ~LC_UPCONFIGURE_DIS; + WREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl); + } +} |
