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"
30 #include "oss/oss_1_0_d.h"
31 #include "oss/oss_1_0_sh_mask.h"
33 static void si_ih_set_interrupt_funcs(struct amdgpu_device *adev);
35 static void si_ih_enable_interrupts(struct amdgpu_device *adev)
37 u32 ih_cntl = RREG32(IH_CNTL);
38 u32 ih_rb_cntl = RREG32(IH_RB_CNTL);
40 ih_cntl |= ENABLE_INTR;
41 ih_rb_cntl |= IH_RB_ENABLE;
42 WREG32(IH_CNTL, ih_cntl);
43 WREG32(IH_RB_CNTL, ih_rb_cntl);
44 adev->irq.ih.enabled = true;
47 static void si_ih_disable_interrupts(struct amdgpu_device *adev)
49 u32 ih_rb_cntl = RREG32(IH_RB_CNTL);
50 u32 ih_cntl = RREG32(IH_CNTL);
52 ih_rb_cntl &= ~IH_RB_ENABLE;
53 ih_cntl &= ~ENABLE_INTR;
54 WREG32(IH_RB_CNTL, ih_rb_cntl);
55 WREG32(IH_CNTL, ih_cntl);
56 WREG32(IH_RB_RPTR, 0);
57 WREG32(IH_RB_WPTR, 0);
58 adev->irq.ih.enabled = false;
59 adev->irq.ih.rptr = 0;
62 static int si_ih_irq_init(struct amdgpu_device *adev)
64 struct amdgpu_ih_ring *ih = &adev->irq.ih;
66 u32 interrupt_cntl, ih_cntl, ih_rb_cntl;
68 si_ih_disable_interrupts(adev);
69 /* set dummy read address to dummy page address */
70 WREG32(INTERRUPT_CNTL2, adev->dummy_page_addr >> 8);
71 interrupt_cntl = RREG32(INTERRUPT_CNTL);
72 interrupt_cntl &= ~IH_DUMMY_RD_OVERRIDE;
73 interrupt_cntl &= ~IH_REQ_NONSNOOP_EN;
74 WREG32(INTERRUPT_CNTL, interrupt_cntl);
76 WREG32(IH_RB_BASE, adev->irq.ih.gpu_addr >> 8);
77 rb_bufsz = order_base_2(adev->irq.ih.ring_size / 4);
79 ih_rb_cntl = IH_WPTR_OVERFLOW_ENABLE |
80 IH_WPTR_OVERFLOW_CLEAR |
82 IH_WPTR_WRITEBACK_ENABLE;
84 WREG32(IH_RB_WPTR_ADDR_LO, lower_32_bits(ih->wptr_addr));
85 WREG32(IH_RB_WPTR_ADDR_HI, upper_32_bits(ih->wptr_addr) & 0xFF);
86 WREG32(IH_RB_CNTL, ih_rb_cntl);
87 WREG32(IH_RB_RPTR, 0);
88 WREG32(IH_RB_WPTR, 0);
90 ih_cntl = MC_WRREQ_CREDIT(0x10) | MC_WR_CLEAN_CNT(0x10) | MC_VMID(0);
91 if (adev->irq.msi_enabled)
92 ih_cntl |= RPTR_REARM;
93 WREG32(IH_CNTL, ih_cntl);
95 pci_set_master(adev->pdev);
96 si_ih_enable_interrupts(adev);
101 static void si_ih_irq_disable(struct amdgpu_device *adev)
103 si_ih_disable_interrupts(adev);
107 static u32 si_ih_get_wptr(struct amdgpu_device *adev,
108 struct amdgpu_ih_ring *ih)
112 wptr = le32_to_cpu(*ih->wptr_cpu);
114 if (wptr & IH_RB_WPTR__RB_OVERFLOW_MASK) {
115 wptr &= ~IH_RB_WPTR__RB_OVERFLOW_MASK;
116 dev_warn(adev->dev, "IH ring buffer overflow (0x%08X, 0x%08X, 0x%08X)\n",
117 wptr, ih->rptr, (wptr + 16) & ih->ptr_mask);
118 ih->rptr = (wptr + 16) & ih->ptr_mask;
119 tmp = RREG32(IH_RB_CNTL);
120 tmp |= IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK;
121 WREG32(IH_RB_CNTL, tmp);
123 /* Unset the CLEAR_OVERFLOW bit immediately so new overflows
126 tmp &= ~IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK;
127 WREG32(IH_RB_CNTL, tmp);
129 return (wptr & ih->ptr_mask);
132 static void si_ih_decode_iv(struct amdgpu_device *adev,
133 struct amdgpu_ih_ring *ih,
134 struct amdgpu_iv_entry *entry)
136 u32 ring_index = ih->rptr >> 2;
139 dw[0] = le32_to_cpu(ih->ring[ring_index + 0]);
140 dw[1] = le32_to_cpu(ih->ring[ring_index + 1]);
141 dw[2] = le32_to_cpu(ih->ring[ring_index + 2]);
142 dw[3] = le32_to_cpu(ih->ring[ring_index + 3]);
144 entry->client_id = AMDGPU_IRQ_CLIENTID_LEGACY;
145 entry->src_id = dw[0] & 0xff;
146 entry->src_data[0] = dw[1] & 0xfffffff;
147 entry->ring_id = dw[2] & 0xff;
148 entry->vmid = (dw[2] >> 8) & 0xff;
153 static void si_ih_set_rptr(struct amdgpu_device *adev,
154 struct amdgpu_ih_ring *ih)
156 WREG32(IH_RB_RPTR, ih->rptr);
159 static int si_ih_early_init(struct amdgpu_ip_block *ip_block)
161 struct amdgpu_device *adev = ip_block->adev;
163 si_ih_set_interrupt_funcs(adev);
168 static int si_ih_sw_init(struct amdgpu_ip_block *ip_block)
171 struct amdgpu_device *adev = ip_block->adev;
173 r = amdgpu_ih_ring_init(adev, &adev->irq.ih, 64 * 1024, false);
177 return amdgpu_irq_init(adev);
180 static int si_ih_sw_fini(struct amdgpu_ip_block *ip_block)
182 struct amdgpu_device *adev = ip_block->adev;
184 amdgpu_irq_fini_sw(adev);
189 static int si_ih_hw_init(struct amdgpu_ip_block *ip_block)
191 struct amdgpu_device *adev = ip_block->adev;
193 return si_ih_irq_init(adev);
196 static int si_ih_hw_fini(struct amdgpu_ip_block *ip_block)
198 si_ih_irq_disable(ip_block->adev);
203 static int si_ih_suspend(struct amdgpu_ip_block *ip_block)
205 return si_ih_hw_fini(ip_block);
208 static int si_ih_resume(struct amdgpu_ip_block *ip_block)
210 return si_ih_hw_init(ip_block);
213 static bool si_ih_is_idle(void *handle)
215 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
216 u32 tmp = RREG32(SRBM_STATUS);
218 if (tmp & SRBM_STATUS__IH_BUSY_MASK)
224 static int si_ih_wait_for_idle(struct amdgpu_ip_block *ip_block)
227 struct amdgpu_device *adev = ip_block->adev;
229 for (i = 0; i < adev->usec_timeout; i++) {
230 if (si_ih_is_idle(adev))
237 static int si_ih_soft_reset(struct amdgpu_ip_block *ip_block)
239 struct amdgpu_device *adev = ip_block->adev;
241 u32 srbm_soft_reset = 0;
242 u32 tmp = RREG32(SRBM_STATUS);
244 if (tmp & SRBM_STATUS__IH_BUSY_MASK)
245 srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_IH_MASK;
247 if (srbm_soft_reset) {
248 tmp = RREG32(SRBM_SOFT_RESET);
249 tmp |= srbm_soft_reset;
250 dev_info(adev->dev, "SRBM_SOFT_RESET=0x%08X\n", tmp);
251 WREG32(SRBM_SOFT_RESET, tmp);
252 tmp = RREG32(SRBM_SOFT_RESET);
256 tmp &= ~srbm_soft_reset;
257 WREG32(SRBM_SOFT_RESET, tmp);
258 tmp = RREG32(SRBM_SOFT_RESET);
266 static int si_ih_set_clockgating_state(struct amdgpu_ip_block *ip_block,
267 enum amd_clockgating_state state)
272 static int si_ih_set_powergating_state(struct amdgpu_ip_block *ip_block,
273 enum amd_powergating_state state)
278 static const struct amd_ip_funcs si_ih_ip_funcs = {
280 .early_init = si_ih_early_init,
281 .sw_init = si_ih_sw_init,
282 .sw_fini = si_ih_sw_fini,
283 .hw_init = si_ih_hw_init,
284 .hw_fini = si_ih_hw_fini,
285 .suspend = si_ih_suspend,
286 .resume = si_ih_resume,
287 .is_idle = si_ih_is_idle,
288 .wait_for_idle = si_ih_wait_for_idle,
289 .soft_reset = si_ih_soft_reset,
290 .set_clockgating_state = si_ih_set_clockgating_state,
291 .set_powergating_state = si_ih_set_powergating_state,
294 static const struct amdgpu_ih_funcs si_ih_funcs = {
295 .get_wptr = si_ih_get_wptr,
296 .decode_iv = si_ih_decode_iv,
297 .set_rptr = si_ih_set_rptr
300 static void si_ih_set_interrupt_funcs(struct amdgpu_device *adev)
302 adev->irq.ih_funcs = &si_ih_funcs;
305 const struct amdgpu_ip_block_version si_ih_ip_block =
307 .type = AMD_IP_BLOCK_TYPE_IH,
311 .funcs = &si_ih_ip_funcs,