diff options
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/radeon/si.c | 162 | ||||
| -rw-r--r-- | drivers/gpu/drm/radeon/sid.h | 50 |
2 files changed, 212 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c index 882509ab166..b073b2caf54 100644 --- a/drivers/gpu/drm/radeon/si.c +++ b/drivers/gpu/drm/radeon/si.c @@ -66,6 +66,7 @@ MODULE_FIRMWARE("radeon/HAINAN_ce.bin"); MODULE_FIRMWARE("radeon/HAINAN_mc.bin"); MODULE_FIRMWARE("radeon/HAINAN_rlc.bin"); +static void si_pcie_gen3_enable(struct radeon_device *rdev); extern int r600_ih_ring_alloc(struct radeon_device *rdev); extern void r600_ih_ring_fini(struct radeon_device *rdev); extern void evergreen_fix_pci_max_read_req_size(struct radeon_device *rdev); @@ -5316,6 +5317,9 @@ static int si_startup(struct radeon_device *rdev) struct radeon_ring *ring; int r; + /* enable pcie gen2/3 link */ + si_pcie_gen3_enable(rdev); + if (!rdev->me_fw || !rdev->pfp_fw || !rdev->ce_fw || !rdev->rlc_fw || !rdev->mc_fw) { r = si_init_microcode(rdev); @@ -5781,3 +5785,161 @@ int si_set_uvd_clocks(struct radeon_device *rdev, u32 vclk, u32 dclk) return 0; } + +static void si_pcie_gen3_enable(struct radeon_device *rdev) +{ + struct pci_dev *root = rdev->pdev->bus->self; + int bridge_pos, gpu_pos; + u32 speed_cntl, mask, current_data_rate; + int ret, i; + u16 tmp16; + + if (radeon_pcie_gen2 == 0) + return; + + if (rdev->flags & RADEON_IS_IGP) + return; + + if (!(rdev->flags & RADEON_IS_PCIE)) + return; + + ret = drm_pcie_get_speed_cap_mask(rdev->ddev, &mask); + if (ret != 0) + return; + + if (!(mask & (DRM_PCIE_SPEED_50 | DRM_PCIE_SPEED_80))) + return; + + speed_cntl = RREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL); + current_data_rate = (speed_cntl & LC_CURRENT_DATA_RATE_MASK) >> + LC_CURRENT_DATA_RATE_SHIFT; + if (mask & DRM_PCIE_SPEED_80) { + if (current_data_rate == 2) { + DRM_INFO("PCIE gen 3 link speeds already enabled\n"); + return; + } + DRM_INFO("enabling PCIE gen 3 link speeds, disable with radeon.pcie_gen2=0\n"); + } else if (mask & DRM_PCIE_SPEED_50) { + if (current_data_rate == 1) { + DRM_INFO("PCIE gen 2 link speeds already enabled\n"); + return; + } + DRM_INFO("enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0\n"); + } + + bridge_pos = pci_pcie_cap(root); + if (!bridge_pos) + return; + + gpu_pos = pci_pcie_cap(rdev->pdev); + if (!gpu_pos) + return; + + if (mask & DRM_PCIE_SPEED_80) { + /* re-try equalization if gen3 is not already enabled */ + if (current_data_rate != 2) { + u16 bridge_cfg, gpu_cfg; + u16 bridge_cfg2, gpu_cfg2; + u32 max_lw, current_lw, tmp; + + pci_read_config_word(root, bridge_pos + PCI_EXP_LNKCTL, &bridge_cfg); + pci_read_config_word(rdev->pdev, gpu_pos + PCI_EXP_LNKCTL, &gpu_cfg); + + tmp16 = bridge_cfg | PCI_EXP_LNKCTL_HAWD; + pci_write_config_word(root, bridge_pos + PCI_EXP_LNKCTL, tmp16); + + tmp16 = gpu_cfg | PCI_EXP_LNKCTL_HAWD; + pci_write_config_word(rdev->pdev, gpu_pos + PCI_EXP_LNKCTL, tmp16); + + tmp = RREG32_PCIE(PCIE_LC_STATUS1); + max_lw = (tmp & LC_DETECTED_LINK_WIDTH_MASK) >> LC_DETECTED_LINK_WIDTH_SHIFT; + current_lw = (tmp & LC_OPERATING_LINK_WIDTH_MASK) >> LC_OPERATING_LINK_WIDTH_SHIFT; + + if (current_lw < max_lw) { + tmp = RREG32_PCIE_PORT(PCIE_LC_LINK_WIDTH_CNTL); + if (tmp & LC_RENEGOTIATION_SUPPORT) { + tmp &= ~(LC_LINK_WIDTH_MASK | LC_UPCONFIGURE_DIS); + tmp |= (max_lw << LC_LINK_WIDTH_SHIFT); + tmp |= LC_UPCONFIGURE_SUPPORT | LC_RENEGOTIATE_EN | LC_RECONFIG_NOW; + WREG32_PCIE_PORT(PCIE_LC_LINK_WIDTH_CNTL, tmp); + } + } + + for (i = 0; i < 10; i++) { + /* check status */ + pci_read_config_word(rdev->pdev, gpu_pos + PCI_EXP_DEVSTA, &tmp16); + if (tmp16 & PCI_EXP_DEVSTA_TRPND) + break; + + pci_read_config_word(root, bridge_pos + PCI_EXP_LNKCTL, &bridge_cfg); + pci_read_config_word(rdev->pdev, gpu_pos + PCI_EXP_LNKCTL, &gpu_cfg); + + pci_read_config_word(root, bridge_pos + PCI_EXP_LNKCTL2, &bridge_cfg2); + pci_read_config_word(rdev->pdev, gpu_pos + PCI_EXP_LNKCTL2, &gpu_cfg2); + + tmp = RREG32_PCIE_PORT(PCIE_LC_CNTL4); + tmp |= LC_SET_QUIESCE; + WREG32_PCIE_PORT(PCIE_LC_CNTL4, tmp); + + tmp = RREG32_PCIE_PORT(PCIE_LC_CNTL4); + tmp |= LC_REDO_EQ; + WREG32_PCIE_PORT(PCIE_LC_CNTL4, tmp); + + mdelay(100); + + /* linkctl */ + pci_read_config_word(root, bridge_pos + PCI_EXP_LNKCTL, &tmp16); + tmp16 &= ~PCI_EXP_LNKCTL_HAWD; + tmp16 |= (bridge_cfg & PCI_EXP_LNKCTL_HAWD); + pci_write_config_word(root, bridge_pos + PCI_EXP_LNKCTL, tmp16); + + pci_read_config_word(rdev->pdev, gpu_pos + PCI_EXP_LNKCTL, &tmp16); + tmp16 &= ~PCI_EXP_LNKCTL_HAWD; + tmp16 |= (gpu_cfg & PCI_EXP_LNKCTL_HAWD); + pci_write_config_word(rdev->pdev, gpu_pos + PCI_EXP_LNKCTL, tmp16); + + /* linkctl2 */ + pci_read_config_word(root, bridge_pos + PCI_EXP_LNKCTL2, &tmp16); + tmp16 &= ~((1 << 4) | (7 << 9)); + tmp16 |= (bridge_cfg2 & ((1 << 4) | (7 << 9))); + pci_write_config_word(root, bridge_pos + PCI_EXP_LNKCTL2, tmp16); + + pci_read_config_word(rdev->pdev, gpu_pos + PCI_EXP_LNKCTL2, &tmp16); + tmp16 &= ~((1 << 4) | (7 << 9)); + tmp16 |= (gpu_cfg2 & ((1 << 4) | (7 << 9))); + pci_write_config_word(rdev->pdev, gpu_pos + PCI_EXP_LNKCTL2, tmp16); + + tmp = RREG32_PCIE_PORT(PCIE_LC_CNTL4); + tmp &= ~LC_SET_QUIESCE; + WREG32_PCIE_PORT(PCIE_LC_CNTL4, tmp); + } + } + } + + /* set the link speed */ + speed_cntl |= LC_FORCE_EN_SW_SPEED_CHANGE | LC_FORCE_DIS_HW_SPEED_CHANGE; + speed_cntl &= ~LC_FORCE_DIS_SW_SPEED_CHANGE; + WREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL, speed_cntl); + + pci_read_config_word(rdev->pdev, gpu_pos + PCI_EXP_LNKCTL2, &tmp16); + tmp16 &= ~0xf; + if (mask & DRM_PCIE_SPEED_80) + tmp16 |= 3; /* gen3 */ + else if (mask & DRM_PCIE_SPEED_50) + tmp16 |= 2; /* gen2 */ + else + tmp16 |= 1; /* gen1 */ + pci_write_config_word(rdev->pdev, gpu_pos + PCI_EXP_LNKCTL2, tmp16); + + speed_cntl = RREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL); + speed_cntl |= LC_INITIATE_LINK_SPEED_CHANGE; + WREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL, speed_cntl); + + for (i = 0; i < rdev->usec_timeout; i++) { + speed_cntl = RREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL); + if ((speed_cntl & LC_INITIATE_LINK_SPEED_CHANGE) == 0) + break; + udelay(1); + } +} + diff --git a/drivers/gpu/drm/radeon/sid.h b/drivers/gpu/drm/radeon/sid.h index 8f2d7d4f9b2..6d4bdbc797a 100644 --- a/drivers/gpu/drm/radeon/sid.h +++ b/drivers/gpu/drm/radeon/sid.h @@ -829,6 +829,56 @@ # define THREAD_TRACE_FLUSH (54 << 0) # define THREAD_TRACE_FINISH (55 << 0) +/* PCIE registers idx/data 0x30/0x34 */ +#define PCIE_LC_STATUS1 0x28 /* PCIE */ +# define LC_OPERATING_LINK_WIDTH_MASK (0x7 << 2) +# define LC_OPERATING_LINK_WIDTH_SHIFT 2 +# define LC_DETECTED_LINK_WIDTH_MASK (0x7 << 5) +# define LC_DETECTED_LINK_WIDTH_SHIFT 5 + +/* PCIE PORT registers idx/data 0x38/0x3c */ +#define PCIE_LC_LINK_WIDTH_CNTL 0xa2 /* PCIE_P */ +# define LC_LINK_WIDTH_SHIFT 0 +# define LC_LINK_WIDTH_MASK 0x7 +# define LC_LINK_WIDTH_X0 0 +# define LC_LINK_WIDTH_X1 1 +# define LC_LINK_WIDTH_X2 2 +# define LC_LINK_WIDTH_X4 3 +# define LC_LINK_WIDTH_X8 4 +# define LC_LINK_WIDTH_X16 6 +# define LC_LINK_WIDTH_RD_SHIFT 4 +# define LC_LINK_WIDTH_RD_MASK 0x70 +# define LC_RECONFIG_ARC_MISSING_ESCAPE (1 << 7) +# define LC_RECONFIG_NOW (1 << 8) +# define LC_RENEGOTIATION_SUPPORT (1 << 9) +# define LC_RENEGOTIATE_EN (1 << 10) +# define LC_SHORT_RECONFIG_EN (1 << 11) +# define LC_UPCONFIGURE_SUPPORT (1 << 12) +# define LC_UPCONFIGURE_DIS (1 << 13) +#define PCIE_LC_SPEED_CNTL 0xa4 /* PCIE_P */ +# define LC_GEN2_EN_STRAP (1 << 0) +# define LC_GEN3_EN_STRAP (1 << 1) +# define LC_TARGET_LINK_SPEED_OVERRIDE_EN (1 << 2) +# define LC_TARGET_LINK_SPEED_OVERRIDE_MASK (0x3 << 3) +# define LC_TARGET_LINK_SPEED_OVERRIDE_SHIFT 3 +# define LC_FORCE_EN_SW_SPEED_CHANGE (1 << 5) +# define LC_FORCE_DIS_SW_SPEED_CHANGE (1 << 6) +# define LC_FORCE_EN_HW_SPEED_CHANGE (1 << 7) +# define LC_FORCE_DIS_HW_SPEED_CHANGE (1 << 8) +# define LC_INITIATE_LINK_SPEED_CHANGE (1 << 9) +# define LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_MASK (0x3 << 10) +# define LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_SHIFT 10 +# define LC_CURRENT_DATA_RATE_MASK (0x3 << 13) /* 0/1/2 = gen1/2/3 */ +# define LC_CURRENT_DATA_RATE_SHIFT 13 +# define LC_CLR_FAILED_SPD_CHANGE_CNT (1 << 16) +# define LC_OTHER_SIDE_EVER_SENT_GEN2 (1 << 18) +# define LC_OTHER_SIDE_SUPPORTS_GEN2 (1 << 19) +# define LC_OTHER_SIDE_EVER_SENT_GEN3 (1 << 20) +# define LC_OTHER_SIDE_SUPPORTS_GEN3 (1 << 21) +#define PCIE_LC_CNTL4 0xb6 /* PCIE_P */ +# define LC_REDO_EQ (1 << 5) +# define LC_SET_QUIESCE (1 << 13) + /* * UVD */ |