From a65a4369f7a69281b65ed42b7fa2a8e8d6ff585f Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Fri, 18 Jan 2013 18:55:54 -0500 Subject: [PATCH] drm/radeon: use status regs to determine what to reset (evergreen) When we attempt the reset the GPU, look at the status registers to determine what blocks need to be reset. Signed-off-by: Alex Deucher --- drivers/gpu/drm/radeon/evergreen.c | 164 ++++++++++++++++++++----- drivers/gpu/drm/radeon/evergreen_reg.h | 1 + drivers/gpu/drm/radeon/evergreend.h | 12 ++ 3 files changed, 145 insertions(+), 32 deletions(-) diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index 48967a967890..8b73743b0b3f 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -2337,6 +2337,8 @@ void evergreen_print_gpu_status_regs(struct radeon_device *rdev) RREG32(GRBM_STATUS_SE1)); dev_info(rdev->dev, " SRBM_STATUS = 0x%08X\n", RREG32(SRBM_STATUS)); + dev_info(rdev->dev, " SRBM_STATUS2 = 0x%08X\n", + RREG32(SRBM_STATUS2)); dev_info(rdev->dev, " R_008674_CP_STALLED_STAT1 = 0x%08X\n", RREG32(CP_STALLED_STAT1)); dev_info(rdev->dev, " R_008678_CP_STALLED_STAT2 = 0x%08X\n", @@ -2349,28 +2351,111 @@ void evergreen_print_gpu_status_regs(struct radeon_device *rdev) RREG32(DMA_STATUS_REG)); } -static int evergreen_gpu_soft_reset(struct radeon_device *rdev, u32 reset_mask) +static bool evergreen_is_display_hung(struct radeon_device *rdev) +{ + u32 crtc_hung = 0; + u32 crtc_status[6]; + u32 i, j, tmp; + + for (i = 0; i < rdev->num_crtc; i++) { + if (RREG32(EVERGREEN_CRTC_CONTROL + crtc_offsets[i]) & EVERGREEN_CRTC_MASTER_EN) { + crtc_status[i] = RREG32(EVERGREEN_CRTC_STATUS_HV_COUNT + crtc_offsets[i]); + crtc_hung |= (1 << i); + } + } + + for (j = 0; j < 10; j++) { + for (i = 0; i < rdev->num_crtc; i++) { + if (crtc_hung & (1 << i)) { + tmp = RREG32(EVERGREEN_CRTC_STATUS_HV_COUNT + crtc_offsets[i]); + if (tmp != crtc_status[i]) + crtc_hung &= ~(1 << i); + } + } + if (crtc_hung == 0) + return false; + udelay(100); + } + + return true; +} + +static u32 evergreen_gpu_check_soft_reset(struct radeon_device *rdev) +{ + u32 reset_mask = 0; + u32 tmp; + + /* GRBM_STATUS */ + tmp = RREG32(GRBM_STATUS); + if (tmp & (PA_BUSY | SC_BUSY | + SH_BUSY | SX_BUSY | + TA_BUSY | VGT_BUSY | + DB_BUSY | CB_BUSY | + SPI_BUSY | VGT_BUSY_NO_DMA)) + reset_mask |= RADEON_RESET_GFX; + + if (tmp & (CF_RQ_PENDING | PF_RQ_PENDING | + CP_BUSY | CP_COHERENCY_BUSY)) + reset_mask |= RADEON_RESET_CP; + + if (tmp & GRBM_EE_BUSY) + reset_mask |= RADEON_RESET_GRBM | RADEON_RESET_GFX | RADEON_RESET_CP; + + /* DMA_STATUS_REG */ + tmp = RREG32(DMA_STATUS_REG); + if (!(tmp & DMA_IDLE)) + reset_mask |= RADEON_RESET_DMA; + + /* SRBM_STATUS2 */ + tmp = RREG32(SRBM_STATUS2); + if (tmp & DMA_BUSY) + reset_mask |= RADEON_RESET_DMA; + + /* SRBM_STATUS */ + tmp = RREG32(SRBM_STATUS); + if (tmp & (RLC_RQ_PENDING | RLC_BUSY)) + reset_mask |= RADEON_RESET_RLC; + + if (tmp & IH_BUSY) + reset_mask |= RADEON_RESET_IH; + + if (tmp & SEM_BUSY) + reset_mask |= RADEON_RESET_SEM; + + if (tmp & GRBM_RQ_PENDING) + reset_mask |= RADEON_RESET_GRBM; + + if (tmp & VMC_BUSY) + reset_mask |= RADEON_RESET_VMC; + + if (tmp & (MCB_BUSY | MCB_NON_DISPLAY_BUSY | + MCC_BUSY | MCD_BUSY)) + reset_mask |= RADEON_RESET_MC; + + if (evergreen_is_display_hung(rdev)) + reset_mask |= RADEON_RESET_DISPLAY; + + /* VM_L2_STATUS */ + tmp = RREG32(VM_L2_STATUS); + if (tmp & L2_BUSY) + reset_mask |= RADEON_RESET_VMC; + + return reset_mask; +} + +static void evergreen_gpu_soft_reset(struct radeon_device *rdev, u32 reset_mask) { struct evergreen_mc_save save; u32 grbm_soft_reset = 0, srbm_soft_reset = 0; u32 tmp; - int ret = 0; - - if (!(RREG32(GRBM_STATUS) & GUI_ACTIVE)) - reset_mask &= ~(RADEON_RESET_GFX | RADEON_RESET_COMPUTE | RADEON_RESET_CP); - - if (RREG32(DMA_STATUS_REG) & DMA_IDLE) - reset_mask &= ~RADEON_RESET_DMA; if (reset_mask == 0) - return 0; + return; dev_info(rdev->dev, "GPU softreset: 0x%08X\n", reset_mask); evergreen_print_gpu_status_regs(rdev); - r600_set_bios_scratch_engine_hung(rdev, true); - evergreen_mc_stop(rdev, &save); if (evergreen_mc_wait_for_idle(rdev)) { dev_warn(rdev->dev, "Wait for MC idle timedout !\n"); @@ -2410,6 +2495,27 @@ static int evergreen_gpu_soft_reset(struct radeon_device *rdev, u32 reset_mask) if (reset_mask & RADEON_RESET_DMA) srbm_soft_reset |= SOFT_RESET_DMA; + if (reset_mask & RADEON_RESET_DISPLAY) + srbm_soft_reset |= SOFT_RESET_DC; + + if (reset_mask & RADEON_RESET_RLC) + srbm_soft_reset |= SOFT_RESET_RLC; + + if (reset_mask & RADEON_RESET_SEM) + srbm_soft_reset |= SOFT_RESET_SEM; + + if (reset_mask & RADEON_RESET_IH) + srbm_soft_reset |= SOFT_RESET_IH; + + if (reset_mask & RADEON_RESET_GRBM) + srbm_soft_reset |= SOFT_RESET_GRBM; + + if (reset_mask & RADEON_RESET_VMC) + srbm_soft_reset |= SOFT_RESET_VMC; + + if (reset_mask & RADEON_RESET_MC) + srbm_soft_reset |= SOFT_RESET_MC; + if (grbm_soft_reset) { tmp = RREG32(GRBM_SOFT_RESET); tmp |= grbm_soft_reset; @@ -2444,32 +2550,26 @@ static int evergreen_gpu_soft_reset(struct radeon_device *rdev, u32 reset_mask) evergreen_mc_resume(rdev, &save); udelay(50); -#if 0 - if (reset_mask & (RADEON_RESET_GFX | RADEON_RESET_COMPUTE | RADEON_RESET_CP)) { - if (RREG32(GRBM_STATUS) & GUI_ACTIVE) - ret = -EAGAIN; - } - - if (reset_mask & RADEON_RESET_DMA) { - if (!(RREG32(DMA_STATUS_REG) & DMA_IDLE)) - ret = -EAGAIN; - } -#endif - - if (!ret) - r600_set_bios_scratch_engine_hung(rdev, false); - evergreen_print_gpu_status_regs(rdev); - - return 0; } int evergreen_asic_reset(struct radeon_device *rdev) { - return evergreen_gpu_soft_reset(rdev, (RADEON_RESET_GFX | - RADEON_RESET_COMPUTE | - RADEON_RESET_DMA | - RADEON_RESET_CP)); + u32 reset_mask; + + reset_mask = evergreen_gpu_check_soft_reset(rdev); + + if (reset_mask) + r600_set_bios_scratch_engine_hung(rdev, true); + + evergreen_gpu_soft_reset(rdev, reset_mask); + + reset_mask = evergreen_gpu_check_soft_reset(rdev); + + if (!reset_mask) + r600_set_bios_scratch_engine_hung(rdev, false); + + return 0; } /* Interrupts */ diff --git a/drivers/gpu/drm/radeon/evergreen_reg.h b/drivers/gpu/drm/radeon/evergreen_reg.h index 034f4c22e5db..f585be16e2d5 100644 --- a/drivers/gpu/drm/radeon/evergreen_reg.h +++ b/drivers/gpu/drm/radeon/evergreen_reg.h @@ -223,6 +223,7 @@ #define EVERGREEN_CRTC_STATUS 0x6e8c # define EVERGREEN_CRTC_V_BLANK (1 << 0) #define EVERGREEN_CRTC_STATUS_POSITION 0x6e90 +#define EVERGREEN_CRTC_STATUS_HV_COUNT 0x6ea0 #define EVERGREEN_MASTER_UPDATE_MODE 0x6ef8 #define EVERGREEN_CRTC_UPDATE_LOCK 0x6ed4 diff --git a/drivers/gpu/drm/radeon/evergreend.h b/drivers/gpu/drm/radeon/evergreend.h index 5ad29f3fc722..982d25ad9af3 100644 --- a/drivers/gpu/drm/radeon/evergreend.h +++ b/drivers/gpu/drm/radeon/evergreend.h @@ -729,6 +729,18 @@ #define WAIT_UNTIL 0x8040 #define SRBM_STATUS 0x0E50 +#define RLC_RQ_PENDING (1 << 3) +#define GRBM_RQ_PENDING (1 << 5) +#define VMC_BUSY (1 << 8) +#define MCB_BUSY (1 << 9) +#define MCB_NON_DISPLAY_BUSY (1 << 10) +#define MCC_BUSY (1 << 11) +#define MCD_BUSY (1 << 12) +#define SEM_BUSY (1 << 14) +#define RLC_BUSY (1 << 15) +#define IH_BUSY (1 << 17) +#define SRBM_STATUS2 0x0EC4 +#define DMA_BUSY (1 << 5) #define SRBM_SOFT_RESET 0x0E60 #define SRBM_SOFT_RESET_ALL_MASK 0x00FEEFA6 #define SOFT_RESET_BIF (1 << 1)