2 * Copyright 2015 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
24 #include <linux/pci.h>
27 #include "amdgpu_ih.h"
31 static void si_ih_set_interrupt_funcs(struct amdgpu_device *adev);
33 static void si_ih_enable_interrupts(struct amdgpu_device *adev)
35 u32 ih_cntl = RREG32(IH_CNTL);
36 u32 ih_rb_cntl = RREG32(IH_RB_CNTL);
38 ih_cntl |= ENABLE_INTR;
39 ih_rb_cntl |= IH_RB_ENABLE;
40 WREG32(IH_CNTL, ih_cntl);
41 WREG32(IH_RB_CNTL, ih_rb_cntl);
42 adev->irq.ih.enabled = true;
45 static void si_ih_disable_interrupts(struct amdgpu_device *adev)
47 u32 ih_rb_cntl = RREG32(IH_RB_CNTL);
48 u32 ih_cntl = RREG32(IH_CNTL);
50 ih_rb_cntl &= ~IH_RB_ENABLE;
51 ih_cntl &= ~ENABLE_INTR;
52 WREG32(IH_RB_CNTL, ih_rb_cntl);
53 WREG32(IH_CNTL, ih_cntl);
54 WREG32(IH_RB_RPTR, 0);
55 WREG32(IH_RB_WPTR, 0);
56 adev->irq.ih.enabled = false;
57 adev->irq.ih.rptr = 0;
60 static int si_ih_irq_init(struct amdgpu_device *adev)
62 struct amdgpu_ih_ring *ih = &adev->irq.ih;
64 u32 interrupt_cntl, ih_cntl, ih_rb_cntl;
66 si_ih_disable_interrupts(adev);
67 WREG32(INTERRUPT_CNTL2, adev->irq.ih.gpu_addr >> 8);
68 interrupt_cntl = RREG32(INTERRUPT_CNTL);
69 interrupt_cntl &= ~IH_DUMMY_RD_OVERRIDE;
70 interrupt_cntl &= ~IH_REQ_NONSNOOP_EN;
71 WREG32(INTERRUPT_CNTL, interrupt_cntl);
73 WREG32(IH_RB_BASE, adev->irq.ih.gpu_addr >> 8);
74 rb_bufsz = order_base_2(adev->irq.ih.ring_size / 4);
76 ih_rb_cntl = IH_WPTR_OVERFLOW_ENABLE |
77 IH_WPTR_OVERFLOW_CLEAR |
79 IH_WPTR_WRITEBACK_ENABLE;
81 WREG32(IH_RB_WPTR_ADDR_LO, lower_32_bits(ih->wptr_addr));
82 WREG32(IH_RB_WPTR_ADDR_HI, upper_32_bits(ih->wptr_addr) & 0xFF);
83 WREG32(IH_RB_CNTL, ih_rb_cntl);
84 WREG32(IH_RB_RPTR, 0);
85 WREG32(IH_RB_WPTR, 0);
87 ih_cntl = MC_WRREQ_CREDIT(0x10) | MC_WR_CLEAN_CNT(0x10) | MC_VMID(0);
88 if (adev->irq.msi_enabled)
89 ih_cntl |= RPTR_REARM;
90 WREG32(IH_CNTL, ih_cntl);
92 pci_set_master(adev->pdev);
93 si_ih_enable_interrupts(adev);
98 static void si_ih_irq_disable(struct amdgpu_device *adev)
100 si_ih_disable_interrupts(adev);
104 static u32 si_ih_get_wptr(struct amdgpu_device *adev,
105 struct amdgpu_ih_ring *ih)
109 wptr = le32_to_cpu(*ih->wptr_cpu);
111 if (wptr & IH_RB_WPTR__RB_OVERFLOW_MASK) {
112 wptr &= ~IH_RB_WPTR__RB_OVERFLOW_MASK;
113 dev_warn(adev->dev, "IH ring buffer overflow (0x%08X, 0x%08X, 0x%08X)\n",
114 wptr, ih->rptr, (wptr + 16) & ih->ptr_mask);
115 ih->rptr = (wptr + 16) & ih->ptr_mask;
116 tmp = RREG32(IH_RB_CNTL);
117 tmp |= IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK;
118 WREG32(IH_RB_CNTL, tmp);
120 return (wptr & ih->ptr_mask);
123 static void si_ih_decode_iv(struct amdgpu_device *adev,
124 struct amdgpu_ih_ring *ih,
125 struct amdgpu_iv_entry *entry)
127 u32 ring_index = ih->rptr >> 2;
130 dw[0] = le32_to_cpu(ih->ring[ring_index + 0]);
131 dw[1] = le32_to_cpu(ih->ring[ring_index + 1]);
132 dw[2] = le32_to_cpu(ih->ring[ring_index + 2]);
133 dw[3] = le32_to_cpu(ih->ring[ring_index + 3]);
135 entry->client_id = AMDGPU_IRQ_CLIENTID_LEGACY;
136 entry->src_id = dw[0] & 0xff;
137 entry->src_data[0] = dw[1] & 0xfffffff;
138 entry->ring_id = dw[2] & 0xff;
139 entry->vmid = (dw[2] >> 8) & 0xff;
144 static void si_ih_set_rptr(struct amdgpu_device *adev,
145 struct amdgpu_ih_ring *ih)
147 WREG32(IH_RB_RPTR, ih->rptr);
150 static int si_ih_early_init(void *handle)
152 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
154 si_ih_set_interrupt_funcs(adev);
159 static int si_ih_sw_init(void *handle)
162 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
164 r = amdgpu_ih_ring_init(adev, &adev->irq.ih, 64 * 1024, false);
168 return amdgpu_irq_init(adev);
171 static int si_ih_sw_fini(void *handle)
173 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
175 amdgpu_irq_fini(adev);
176 amdgpu_ih_ring_fini(adev, &adev->irq.ih);
181 static int si_ih_hw_init(void *handle)
183 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
185 return si_ih_irq_init(adev);
188 static int si_ih_hw_fini(void *handle)
190 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
192 si_ih_irq_disable(adev);
197 static int si_ih_suspend(void *handle)
199 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
201 return si_ih_hw_fini(adev);
204 static int si_ih_resume(void *handle)
206 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
208 return si_ih_hw_init(adev);
211 static bool si_ih_is_idle(void *handle)
213 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
214 u32 tmp = RREG32(SRBM_STATUS);
216 if (tmp & SRBM_STATUS__IH_BUSY_MASK)
222 static int si_ih_wait_for_idle(void *handle)
225 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
227 for (i = 0; i < adev->usec_timeout; i++) {
228 if (si_ih_is_idle(handle))
235 static int si_ih_soft_reset(void *handle)
237 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
239 u32 srbm_soft_reset = 0;
240 u32 tmp = RREG32(SRBM_STATUS);
242 if (tmp & SRBM_STATUS__IH_BUSY_MASK)
243 srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_IH_MASK;
245 if (srbm_soft_reset) {
246 tmp = RREG32(SRBM_SOFT_RESET);
247 tmp |= srbm_soft_reset;
248 dev_info(adev->dev, "SRBM_SOFT_RESET=0x%08X\n", tmp);
249 WREG32(SRBM_SOFT_RESET, tmp);
250 tmp = RREG32(SRBM_SOFT_RESET);
254 tmp &= ~srbm_soft_reset;
255 WREG32(SRBM_SOFT_RESET, tmp);
256 tmp = RREG32(SRBM_SOFT_RESET);
264 static int si_ih_set_clockgating_state(void *handle,
265 enum amd_clockgating_state state)
270 static int si_ih_set_powergating_state(void *handle,
271 enum amd_powergating_state state)
276 static const struct amd_ip_funcs si_ih_ip_funcs = {
278 .early_init = si_ih_early_init,
280 .sw_init = si_ih_sw_init,
281 .sw_fini = si_ih_sw_fini,
282 .hw_init = si_ih_hw_init,
283 .hw_fini = si_ih_hw_fini,
284 .suspend = si_ih_suspend,
285 .resume = si_ih_resume,
286 .is_idle = si_ih_is_idle,
287 .wait_for_idle = si_ih_wait_for_idle,
288 .soft_reset = si_ih_soft_reset,
289 .set_clockgating_state = si_ih_set_clockgating_state,
290 .set_powergating_state = si_ih_set_powergating_state,
293 static const struct amdgpu_ih_funcs si_ih_funcs = {
294 .get_wptr = si_ih_get_wptr,
295 .decode_iv = si_ih_decode_iv,
296 .set_rptr = si_ih_set_rptr
299 static void si_ih_set_interrupt_funcs(struct amdgpu_device *adev)
301 adev->irq.ih_funcs = &si_ih_funcs;
304 const struct amdgpu_ip_block_version si_ih_ip_block =
306 .type = AMD_IP_BLOCK_TYPE_IH,
310 .funcs = &si_ih_ip_funcs,