| /* |
| * Copyright 2012 Advanced Micro Devices, Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| */ |
| #include "drmP.h" |
| #include "amdgpu.h" |
| #include "amdgpu_ih.h" |
| #include "cikd.h" |
| |
| #include "bif/bif_4_1_d.h" |
| #include "bif/bif_4_1_sh_mask.h" |
| |
| #include "oss/oss_2_0_d.h" |
| #include "oss/oss_2_0_sh_mask.h" |
| |
| /* |
| * Interrupts |
| * Starting with r6xx, interrupts are handled via a ring buffer. |
| * Ring buffers are areas of GPU accessible memory that the GPU |
| * writes interrupt vectors into and the host reads vectors out of. |
| * There is a rptr (read pointer) that determines where the |
| * host is currently reading, and a wptr (write pointer) |
| * which determines where the GPU has written. When the |
| * pointers are equal, the ring is idle. When the GPU |
| * writes vectors to the ring buffer, it increments the |
| * wptr. When there is an interrupt, the host then starts |
| * fetching commands and processing them until the pointers are |
| * equal again at which point it updates the rptr. |
| */ |
| |
| static void cik_ih_set_interrupt_funcs(struct amdgpu_device *adev); |
| |
| /** |
| * cik_ih_enable_interrupts - Enable the interrupt ring buffer |
| * |
| * @adev: amdgpu_device pointer |
| * |
| * Enable the interrupt ring buffer (CIK). |
| */ |
| static void cik_ih_enable_interrupts(struct amdgpu_device *adev) |
| { |
| u32 ih_cntl = RREG32(mmIH_CNTL); |
| u32 ih_rb_cntl = RREG32(mmIH_RB_CNTL); |
| |
| ih_cntl |= IH_CNTL__ENABLE_INTR_MASK; |
| ih_rb_cntl |= IH_RB_CNTL__RB_ENABLE_MASK; |
| WREG32(mmIH_CNTL, ih_cntl); |
| WREG32(mmIH_RB_CNTL, ih_rb_cntl); |
| adev->irq.ih.enabled = true; |
| } |
| |
| /** |
| * cik_ih_disable_interrupts - Disable the interrupt ring buffer |
| * |
| * @adev: amdgpu_device pointer |
| * |
| * Disable the interrupt ring buffer (CIK). |
| */ |
| static void cik_ih_disable_interrupts(struct amdgpu_device *adev) |
| { |
| u32 ih_rb_cntl = RREG32(mmIH_RB_CNTL); |
| u32 ih_cntl = RREG32(mmIH_CNTL); |
| |
| ih_rb_cntl &= ~IH_RB_CNTL__RB_ENABLE_MASK; |
| ih_cntl &= ~IH_CNTL__ENABLE_INTR_MASK; |
| WREG32(mmIH_RB_CNTL, ih_rb_cntl); |
| WREG32(mmIH_CNTL, ih_cntl); |
| /* set rptr, wptr to 0 */ |
| WREG32(mmIH_RB_RPTR, 0); |
| WREG32(mmIH_RB_WPTR, 0); |
| adev->irq.ih.enabled = false; |
| adev->irq.ih.rptr = 0; |
| } |
| |
| /** |
| * cik_ih_irq_init - init and enable the interrupt ring |
| * |
| * @adev: amdgpu_device pointer |
| * |
| * Allocate a ring buffer for the interrupt controller, |
| * enable the RLC, disable interrupts, enable the IH |
| * ring buffer and enable it (CIK). |
| * Called at device load and reume. |
| * Returns 0 for success, errors for failure. |
| */ |
| static int cik_ih_irq_init(struct amdgpu_device *adev) |
| { |
| int ret = 0; |
| int rb_bufsz; |
| u32 interrupt_cntl, ih_cntl, ih_rb_cntl; |
| u64 wptr_off; |
| |
| /* disable irqs */ |
| cik_ih_disable_interrupts(adev); |
| |
| /* setup interrupt control */ |
| WREG32(mmINTERRUPT_CNTL2, adev->dummy_page.addr >> 8); |
| interrupt_cntl = RREG32(mmINTERRUPT_CNTL); |
| /* INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK=0 - dummy read disabled with msi, enabled without msi |
| * INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK=1 - dummy read controlled by IH_DUMMY_RD_EN |
| */ |
| interrupt_cntl &= ~INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK; |
| /* INTERRUPT_CNTL__IH_REQ_NONSNOOP_EN_MASK=1 if ring is in non-cacheable memory, e.g., vram */ |
| interrupt_cntl &= ~INTERRUPT_CNTL__IH_REQ_NONSNOOP_EN_MASK; |
| WREG32(mmINTERRUPT_CNTL, interrupt_cntl); |
| |
| WREG32(mmIH_RB_BASE, adev->irq.ih.gpu_addr >> 8); |
| rb_bufsz = order_base_2(adev->irq.ih.ring_size / 4); |
| |
| ih_rb_cntl = (IH_RB_CNTL__WPTR_OVERFLOW_ENABLE_MASK | |
| IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK | |
| (rb_bufsz << 1)); |
| |
| ih_rb_cntl |= IH_RB_CNTL__WPTR_WRITEBACK_ENABLE_MASK; |
| |
| /* set the writeback address whether it's enabled or not */ |
| wptr_off = adev->wb.gpu_addr + (adev->irq.ih.wptr_offs * 4); |
| WREG32(mmIH_RB_WPTR_ADDR_LO, lower_32_bits(wptr_off)); |
| WREG32(mmIH_RB_WPTR_ADDR_HI, upper_32_bits(wptr_off) & 0xFF); |
| |
| WREG32(mmIH_RB_CNTL, ih_rb_cntl); |
| |
| /* set rptr, wptr to 0 */ |
| WREG32(mmIH_RB_RPTR, 0); |
| WREG32(mmIH_RB_WPTR, 0); |
| |
| /* Default settings for IH_CNTL (disabled at first) */ |
| ih_cntl = (0x10 << IH_CNTL__MC_WRREQ_CREDIT__SHIFT) | |
| (0x10 << IH_CNTL__MC_WR_CLEAN_CNT__SHIFT) | |
| (0 << IH_CNTL__MC_VMID__SHIFT); |
| /* IH_CNTL__RPTR_REARM_MASK only works if msi's are enabled */ |
| if (adev->irq.msi_enabled) |
| ih_cntl |= IH_CNTL__RPTR_REARM_MASK; |
| WREG32(mmIH_CNTL, ih_cntl); |
| |
| pci_set_master(adev->pdev); |
| |
| /* enable irqs */ |
| cik_ih_enable_interrupts(adev); |
| |
| return ret; |
| } |
| |
| /** |
| * cik_ih_irq_disable - disable interrupts |
| * |
| * @adev: amdgpu_device pointer |
| * |
| * Disable interrupts on the hw (CIK). |
| */ |
| static void cik_ih_irq_disable(struct amdgpu_device *adev) |
| { |
| cik_ih_disable_interrupts(adev); |
| /* Wait and acknowledge irq */ |
| mdelay(1); |
| } |
| |
| /** |
| * cik_ih_get_wptr - get the IH ring buffer wptr |
| * |
| * @adev: amdgpu_device pointer |
| * |
| * Get the IH ring buffer wptr from either the register |
| * or the writeback memory buffer (CIK). Also check for |
| * ring buffer overflow and deal with it. |
| * Used by cik_irq_process(). |
| * Returns the value of the wptr. |
| */ |
| static u32 cik_ih_get_wptr(struct amdgpu_device *adev) |
| { |
| u32 wptr, tmp; |
| |
| wptr = le32_to_cpu(adev->wb.wb[adev->irq.ih.wptr_offs]); |
| |
| if (wptr & IH_RB_WPTR__RB_OVERFLOW_MASK) { |
| wptr &= ~IH_RB_WPTR__RB_OVERFLOW_MASK; |
| /* When a ring buffer overflow happen start parsing interrupt |
| * from the last not overwritten vector (wptr + 16). Hopefully |
| * this should allow us to catchup. |
| */ |
| dev_warn(adev->dev, "IH ring buffer overflow (0x%08X, 0x%08X, 0x%08X)\n", |
| wptr, adev->irq.ih.rptr, (wptr + 16) & adev->irq.ih.ptr_mask); |
| adev->irq.ih.rptr = (wptr + 16) & adev->irq.ih.ptr_mask; |
| tmp = RREG32(mmIH_RB_CNTL); |
| tmp |= IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK; |
| WREG32(mmIH_RB_CNTL, tmp); |
| } |
| return (wptr & adev->irq.ih.ptr_mask); |
| } |
| |
| /* CIK IV Ring |
| * Each IV ring entry is 128 bits: |
| * [7:0] - interrupt source id |
| * [31:8] - reserved |
| * [59:32] - interrupt source data |
| * [63:60] - reserved |
| * [71:64] - RINGID |
| * CP: |
| * ME_ID [1:0], PIPE_ID[1:0], QUEUE_ID[2:0] |
| * QUEUE_ID - for compute, which of the 8 queues owned by the dispatcher |
| * - for gfx, hw shader state (0=PS...5=LS, 6=CS) |
| * ME_ID - 0 = gfx, 1 = first 4 CS pipes, 2 = second 4 CS pipes |
| * PIPE_ID - ME0 0=3D |
| * - ME1&2 compute dispatcher (4 pipes each) |
| * SDMA: |
| * INSTANCE_ID [1:0], QUEUE_ID[1:0] |
| * INSTANCE_ID - 0 = sdma0, 1 = sdma1 |
| * QUEUE_ID - 0 = gfx, 1 = rlc0, 2 = rlc1 |
| * [79:72] - VMID |
| * [95:80] - PASID |
| * [127:96] - reserved |
| */ |
| |
| /** |
| * cik_ih_decode_iv - decode an interrupt vector |
| * |
| * @adev: amdgpu_device pointer |
| * |
| * Decodes the interrupt vector at the current rptr |
| * position and also advance the position. |
| */ |
| static void cik_ih_decode_iv(struct amdgpu_device *adev, |
| struct amdgpu_iv_entry *entry) |
| { |
| /* wptr/rptr are in bytes! */ |
| u32 ring_index = adev->irq.ih.rptr >> 2; |
| uint32_t dw[4]; |
| |
| dw[0] = le32_to_cpu(adev->irq.ih.ring[ring_index + 0]); |
| dw[1] = le32_to_cpu(adev->irq.ih.ring[ring_index + 1]); |
| dw[2] = le32_to_cpu(adev->irq.ih.ring[ring_index + 2]); |
| dw[3] = le32_to_cpu(adev->irq.ih.ring[ring_index + 3]); |
| |
| entry->src_id = dw[0] & 0xff; |
| entry->src_data = dw[1] & 0xfffffff; |
| entry->ring_id = dw[2] & 0xff; |
| entry->vm_id = (dw[2] >> 8) & 0xff; |
| entry->pas_id = (dw[2] >> 16) & 0xffff; |
| |
| /* wptr/rptr are in bytes! */ |
| adev->irq.ih.rptr += 16; |
| } |
| |
| /** |
| * cik_ih_set_rptr - set the IH ring buffer rptr |
| * |
| * @adev: amdgpu_device pointer |
| * |
| * Set the IH ring buffer rptr. |
| */ |
| static void cik_ih_set_rptr(struct amdgpu_device *adev) |
| { |
| WREG32(mmIH_RB_RPTR, adev->irq.ih.rptr); |
| } |
| |
| static int cik_ih_early_init(void *handle) |
| { |
| struct amdgpu_device *adev = (struct amdgpu_device *)handle; |
| int ret; |
| |
| ret = amdgpu_irq_add_domain(adev); |
| if (ret) |
| return ret; |
| |
| cik_ih_set_interrupt_funcs(adev); |
| |
| return 0; |
| } |
| |
| static int cik_ih_sw_init(void *handle) |
| { |
| int r; |
| struct amdgpu_device *adev = (struct amdgpu_device *)handle; |
| |
| r = amdgpu_ih_ring_init(adev, 64 * 1024, false); |
| if (r) |
| return r; |
| |
| r = amdgpu_irq_init(adev); |
| |
| return r; |
| } |
| |
| static int cik_ih_sw_fini(void *handle) |
| { |
| struct amdgpu_device *adev = (struct amdgpu_device *)handle; |
| |
| amdgpu_irq_fini(adev); |
| amdgpu_ih_ring_fini(adev); |
| amdgpu_irq_remove_domain(adev); |
| |
| return 0; |
| } |
| |
| static int cik_ih_hw_init(void *handle) |
| { |
| int r; |
| struct amdgpu_device *adev = (struct amdgpu_device *)handle; |
| |
| r = cik_ih_irq_init(adev); |
| if (r) |
| return r; |
| |
| return 0; |
| } |
| |
| static int cik_ih_hw_fini(void *handle) |
| { |
| struct amdgpu_device *adev = (struct amdgpu_device *)handle; |
| |
| cik_ih_irq_disable(adev); |
| |
| return 0; |
| } |
| |
| static int cik_ih_suspend(void *handle) |
| { |
| struct amdgpu_device *adev = (struct amdgpu_device *)handle; |
| |
| return cik_ih_hw_fini(adev); |
| } |
| |
| static int cik_ih_resume(void *handle) |
| { |
| struct amdgpu_device *adev = (struct amdgpu_device *)handle; |
| |
| return cik_ih_hw_init(adev); |
| } |
| |
| static bool cik_ih_is_idle(void *handle) |
| { |
| struct amdgpu_device *adev = (struct amdgpu_device *)handle; |
| u32 tmp = RREG32(mmSRBM_STATUS); |
| |
| if (tmp & SRBM_STATUS__IH_BUSY_MASK) |
| return false; |
| |
| return true; |
| } |
| |
| static int cik_ih_wait_for_idle(void *handle) |
| { |
| unsigned i; |
| u32 tmp; |
| struct amdgpu_device *adev = (struct amdgpu_device *)handle; |
| |
| for (i = 0; i < adev->usec_timeout; i++) { |
| /* read MC_STATUS */ |
| tmp = RREG32(mmSRBM_STATUS) & SRBM_STATUS__IH_BUSY_MASK; |
| if (!tmp) |
| return 0; |
| udelay(1); |
| } |
| return -ETIMEDOUT; |
| } |
| |
| static void cik_ih_print_status(void *handle) |
| { |
| struct amdgpu_device *adev = (struct amdgpu_device *)handle; |
| |
| dev_info(adev->dev, "CIK IH registers\n"); |
| dev_info(adev->dev, " SRBM_STATUS=0x%08X\n", |
| RREG32(mmSRBM_STATUS)); |
| dev_info(adev->dev, " SRBM_STATUS2=0x%08X\n", |
| RREG32(mmSRBM_STATUS2)); |
| dev_info(adev->dev, " INTERRUPT_CNTL=0x%08X\n", |
| RREG32(mmINTERRUPT_CNTL)); |
| dev_info(adev->dev, " INTERRUPT_CNTL2=0x%08X\n", |
| RREG32(mmINTERRUPT_CNTL2)); |
| dev_info(adev->dev, " IH_CNTL=0x%08X\n", |
| RREG32(mmIH_CNTL)); |
| dev_info(adev->dev, " IH_RB_CNTL=0x%08X\n", |
| RREG32(mmIH_RB_CNTL)); |
| dev_info(adev->dev, " IH_RB_BASE=0x%08X\n", |
| RREG32(mmIH_RB_BASE)); |
| dev_info(adev->dev, " IH_RB_WPTR_ADDR_LO=0x%08X\n", |
| RREG32(mmIH_RB_WPTR_ADDR_LO)); |
| dev_info(adev->dev, " IH_RB_WPTR_ADDR_HI=0x%08X\n", |
| RREG32(mmIH_RB_WPTR_ADDR_HI)); |
| dev_info(adev->dev, " IH_RB_RPTR=0x%08X\n", |
| RREG32(mmIH_RB_RPTR)); |
| dev_info(adev->dev, " IH_RB_WPTR=0x%08X\n", |
| RREG32(mmIH_RB_WPTR)); |
| } |
| |
| static int cik_ih_soft_reset(void *handle) |
| { |
| struct amdgpu_device *adev = (struct amdgpu_device *)handle; |
| |
| u32 srbm_soft_reset = 0; |
| u32 tmp = RREG32(mmSRBM_STATUS); |
| |
| if (tmp & SRBM_STATUS__IH_BUSY_MASK) |
| srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_IH_MASK; |
| |
| if (srbm_soft_reset) { |
| cik_ih_print_status((void *)adev); |
| |
| tmp = RREG32(mmSRBM_SOFT_RESET); |
| tmp |= srbm_soft_reset; |
| dev_info(adev->dev, "SRBM_SOFT_RESET=0x%08X\n", tmp); |
| WREG32(mmSRBM_SOFT_RESET, tmp); |
| tmp = RREG32(mmSRBM_SOFT_RESET); |
| |
| udelay(50); |
| |
| tmp &= ~srbm_soft_reset; |
| WREG32(mmSRBM_SOFT_RESET, tmp); |
| tmp = RREG32(mmSRBM_SOFT_RESET); |
| |
| /* Wait a little for things to settle down */ |
| udelay(50); |
| |
| cik_ih_print_status((void *)adev); |
| } |
| |
| return 0; |
| } |
| |
| static int cik_ih_set_clockgating_state(void *handle, |
| enum amd_clockgating_state state) |
| { |
| return 0; |
| } |
| |
| static int cik_ih_set_powergating_state(void *handle, |
| enum amd_powergating_state state) |
| { |
| return 0; |
| } |
| |
| const struct amd_ip_funcs cik_ih_ip_funcs = { |
| .early_init = cik_ih_early_init, |
| .late_init = NULL, |
| .sw_init = cik_ih_sw_init, |
| .sw_fini = cik_ih_sw_fini, |
| .hw_init = cik_ih_hw_init, |
| .hw_fini = cik_ih_hw_fini, |
| .suspend = cik_ih_suspend, |
| .resume = cik_ih_resume, |
| .is_idle = cik_ih_is_idle, |
| .wait_for_idle = cik_ih_wait_for_idle, |
| .soft_reset = cik_ih_soft_reset, |
| .print_status = cik_ih_print_status, |
| .set_clockgating_state = cik_ih_set_clockgating_state, |
| .set_powergating_state = cik_ih_set_powergating_state, |
| }; |
| |
| static const struct amdgpu_ih_funcs cik_ih_funcs = { |
| .get_wptr = cik_ih_get_wptr, |
| .decode_iv = cik_ih_decode_iv, |
| .set_rptr = cik_ih_set_rptr |
| }; |
| |
| static void cik_ih_set_interrupt_funcs(struct amdgpu_device *adev) |
| { |
| if (adev->irq.ih_funcs == NULL) |
| adev->irq.ih_funcs = &cik_ih_funcs; |
| } |