2 * Copyright 2016 Advanced Micro Devices, Inc.
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5 * copy of this software and associated documentation files (the "Software"),
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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.
25 #include "amdgpu_ih.h"
29 #include "vega10/soc15ip.h"
30 #include "vega10/OSSSYS/osssys_4_0_offset.h"
31 #include "vega10/OSSSYS/osssys_4_0_sh_mask.h"
33 #include "soc15_common.h"
34 #include "vega10_ih.h"
38 static void vega10_ih_set_interrupt_funcs(struct amdgpu_device *adev);
41 * vega10_ih_enable_interrupts - Enable the interrupt ring buffer
43 * @adev: amdgpu_device pointer
45 * Enable the interrupt ring buffer (VEGA10).
47 static void vega10_ih_enable_interrupts(struct amdgpu_device *adev)
49 u32 ih_rb_cntl = RREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL));
51 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_ENABLE, 1);
52 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, ENABLE_INTR, 1);
53 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL), ih_rb_cntl);
54 adev->irq.ih.enabled = true;
58 * vega10_ih_disable_interrupts - Disable the interrupt ring buffer
60 * @adev: amdgpu_device pointer
62 * Disable the interrupt ring buffer (VEGA10).
64 static void vega10_ih_disable_interrupts(struct amdgpu_device *adev)
66 u32 ih_rb_cntl = RREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL));
68 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_ENABLE, 0);
69 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, ENABLE_INTR, 0);
70 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL), ih_rb_cntl);
71 /* set rptr, wptr to 0 */
72 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR), 0);
73 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR), 0);
74 adev->irq.ih.enabled = false;
75 adev->irq.ih.rptr = 0;
79 * vega10_ih_irq_init - init and enable the interrupt ring
81 * @adev: amdgpu_device pointer
83 * Allocate a ring buffer for the interrupt controller,
84 * enable the RLC, disable interrupts, enable the IH
85 * ring buffer and enable it (VI).
86 * Called at device load and reume.
87 * Returns 0 for success, errors for failure.
89 static int vega10_ih_irq_init(struct amdgpu_device *adev)
93 u32 ih_rb_cntl, ih_doorbell_rtpr;
98 vega10_ih_disable_interrupts(adev);
100 if (adev->flags & AMD_IS_APU)
101 nbio_v7_0_ih_control(adev);
103 nbio_v6_1_ih_control(adev);
105 ih_rb_cntl = RREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL));
106 /* Ring Buffer base. [39:8] of 40-bit address of the beginning of the ring buffer*/
107 if (adev->irq.ih.use_bus_addr) {
108 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE), adev->irq.ih.rb_dma_addr >> 8);
109 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI), ((u64)adev->irq.ih.rb_dma_addr >> 40) & 0xff);
110 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SPACE, 1);
112 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE), adev->irq.ih.gpu_addr >> 8);
113 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI), (adev->irq.ih.gpu_addr >> 40) & 0xff);
114 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SPACE, 4);
116 rb_bufsz = order_base_2(adev->irq.ih.ring_size / 4);
117 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
118 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, WPTR_OVERFLOW_ENABLE, 1);
119 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_SIZE, rb_bufsz);
120 /* Ring Buffer write pointer writeback. If enabled, IH_RB_WPTR register value is written to memory */
121 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, WPTR_WRITEBACK_ENABLE, 1);
122 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SNOOP, 1);
123 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_RO, 0);
124 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_VMID, 0);
126 if (adev->irq.msi_enabled)
127 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RPTR_REARM, 1);
129 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL), ih_rb_cntl);
131 /* set the writeback address whether it's enabled or not */
132 if (adev->irq.ih.use_bus_addr)
133 wptr_off = adev->irq.ih.rb_dma_addr + (adev->irq.ih.wptr_offs * 4);
135 wptr_off = adev->wb.gpu_addr + (adev->irq.ih.wptr_offs * 4);
136 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_LO), lower_32_bits(wptr_off));
137 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_HI), upper_32_bits(wptr_off) & 0xFF);
139 /* set rptr, wptr to 0 */
140 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR), 0);
141 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR), 0);
143 ih_doorbell_rtpr = RREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR));
144 if (adev->irq.ih.use_doorbell) {
145 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, IH_DOORBELL_RPTR,
146 OFFSET, adev->irq.ih.doorbell_index);
147 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, IH_DOORBELL_RPTR,
150 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, IH_DOORBELL_RPTR,
153 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR), ih_doorbell_rtpr);
154 if (adev->flags & AMD_IS_APU)
155 nbio_v7_0_ih_doorbell_range(adev, adev->irq.ih.use_doorbell, adev->irq.ih.doorbell_index);
157 nbio_v6_1_ih_doorbell_range(adev, adev->irq.ih.use_doorbell, adev->irq.ih.doorbell_index);
159 tmp = RREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_STORM_CLIENT_LIST_CNTL));
160 tmp = REG_SET_FIELD(tmp, IH_STORM_CLIENT_LIST_CNTL,
161 CLIENT18_IS_STORM_CLIENT, 1);
162 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_STORM_CLIENT_LIST_CNTL), tmp);
164 tmp = RREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_INT_FLOOD_CNTL));
165 tmp = REG_SET_FIELD(tmp, IH_INT_FLOOD_CNTL, FLOOD_CNTL_ENABLE, 1);
166 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_INT_FLOOD_CNTL), tmp);
168 pci_set_master(adev->pdev);
170 /* enable interrupts */
171 vega10_ih_enable_interrupts(adev);
177 * vega10_ih_irq_disable - disable interrupts
179 * @adev: amdgpu_device pointer
181 * Disable interrupts on the hw (VEGA10).
183 static void vega10_ih_irq_disable(struct amdgpu_device *adev)
185 vega10_ih_disable_interrupts(adev);
187 /* Wait and acknowledge irq */
192 * vega10_ih_get_wptr - get the IH ring buffer wptr
194 * @adev: amdgpu_device pointer
196 * Get the IH ring buffer wptr from either the register
197 * or the writeback memory buffer (VEGA10). Also check for
198 * ring buffer overflow and deal with it.
199 * Returns the value of the wptr.
201 static u32 vega10_ih_get_wptr(struct amdgpu_device *adev)
205 if (adev->irq.ih.use_bus_addr)
206 wptr = le32_to_cpu(adev->irq.ih.ring[adev->irq.ih.wptr_offs]);
208 wptr = le32_to_cpu(adev->wb.wb[adev->irq.ih.wptr_offs]);
210 if (REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW)) {
211 wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0);
213 /* When a ring buffer overflow happen start parsing interrupt
214 * from the last not overwritten vector (wptr + 32). Hopefully
215 * this should allow us to catchup.
217 tmp = (wptr + 32) & adev->irq.ih.ptr_mask;
218 dev_warn(adev->dev, "IH ring buffer overflow (0x%08X, 0x%08X, 0x%08X)\n",
219 wptr, adev->irq.ih.rptr, tmp);
220 adev->irq.ih.rptr = tmp;
222 tmp = RREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL));
223 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
224 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL), tmp);
226 return (wptr & adev->irq.ih.ptr_mask);
230 * vega10_ih_decode_iv - decode an interrupt vector
232 * @adev: amdgpu_device pointer
234 * Decodes the interrupt vector at the current rptr
235 * position and also advance the position.
237 static void vega10_ih_decode_iv(struct amdgpu_device *adev,
238 struct amdgpu_iv_entry *entry)
240 /* wptr/rptr are in bytes! */
241 u32 ring_index = adev->irq.ih.rptr >> 2;
244 dw[0] = le32_to_cpu(adev->irq.ih.ring[ring_index + 0]);
245 dw[1] = le32_to_cpu(adev->irq.ih.ring[ring_index + 1]);
246 dw[2] = le32_to_cpu(adev->irq.ih.ring[ring_index + 2]);
247 dw[3] = le32_to_cpu(adev->irq.ih.ring[ring_index + 3]);
248 dw[4] = le32_to_cpu(adev->irq.ih.ring[ring_index + 4]);
249 dw[5] = le32_to_cpu(adev->irq.ih.ring[ring_index + 5]);
250 dw[6] = le32_to_cpu(adev->irq.ih.ring[ring_index + 6]);
251 dw[7] = le32_to_cpu(adev->irq.ih.ring[ring_index + 7]);
253 entry->client_id = dw[0] & 0xff;
254 entry->src_id = (dw[0] >> 8) & 0xff;
255 entry->ring_id = (dw[0] >> 16) & 0xff;
256 entry->vm_id = (dw[0] >> 24) & 0xf;
257 entry->vm_id_src = (dw[0] >> 31);
258 entry->timestamp = dw[1] | ((u64)(dw[2] & 0xffff) << 32);
259 entry->timestamp_src = dw[2] >> 31;
260 entry->pas_id = dw[3] & 0xffff;
261 entry->pasid_src = dw[3] >> 31;
262 entry->src_data[0] = dw[4];
263 entry->src_data[1] = dw[5];
264 entry->src_data[2] = dw[6];
265 entry->src_data[3] = dw[7];
268 /* wptr/rptr are in bytes! */
269 adev->irq.ih.rptr += 32;
273 * vega10_ih_set_rptr - set the IH ring buffer rptr
275 * @adev: amdgpu_device pointer
277 * Set the IH ring buffer rptr.
279 static void vega10_ih_set_rptr(struct amdgpu_device *adev)
281 if (adev->irq.ih.use_doorbell) {
282 /* XXX check if swapping is necessary on BE */
283 if (adev->irq.ih.use_bus_addr)
284 adev->irq.ih.ring[adev->irq.ih.rptr_offs] = adev->irq.ih.rptr;
286 adev->wb.wb[adev->irq.ih.rptr_offs] = adev->irq.ih.rptr;
287 WDOORBELL32(adev->irq.ih.doorbell_index, adev->irq.ih.rptr);
289 WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR), adev->irq.ih.rptr);
293 static int vega10_ih_early_init(void *handle)
295 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
297 vega10_ih_set_interrupt_funcs(adev);
301 static int vega10_ih_sw_init(void *handle)
304 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
306 r = amdgpu_ih_ring_init(adev, 256 * 1024, true);
310 adev->irq.ih.use_doorbell = true;
311 adev->irq.ih.doorbell_index = AMDGPU_DOORBELL64_IH << 1;
313 r = amdgpu_irq_init(adev);
318 static int vega10_ih_sw_fini(void *handle)
320 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
322 amdgpu_irq_fini(adev);
323 amdgpu_ih_ring_fini(adev);
328 static int vega10_ih_hw_init(void *handle)
331 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
333 r = vega10_ih_irq_init(adev);
340 static int vega10_ih_hw_fini(void *handle)
342 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
344 vega10_ih_irq_disable(adev);
349 static int vega10_ih_suspend(void *handle)
351 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
353 return vega10_ih_hw_fini(adev);
356 static int vega10_ih_resume(void *handle)
358 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
360 return vega10_ih_hw_init(adev);
363 static bool vega10_ih_is_idle(void *handle)
369 static int vega10_ih_wait_for_idle(void *handle)
375 static int vega10_ih_soft_reset(void *handle)
382 static int vega10_ih_set_clockgating_state(void *handle,
383 enum amd_clockgating_state state)
388 static int vega10_ih_set_powergating_state(void *handle,
389 enum amd_powergating_state state)
394 const struct amd_ip_funcs vega10_ih_ip_funcs = {
396 .early_init = vega10_ih_early_init,
398 .sw_init = vega10_ih_sw_init,
399 .sw_fini = vega10_ih_sw_fini,
400 .hw_init = vega10_ih_hw_init,
401 .hw_fini = vega10_ih_hw_fini,
402 .suspend = vega10_ih_suspend,
403 .resume = vega10_ih_resume,
404 .is_idle = vega10_ih_is_idle,
405 .wait_for_idle = vega10_ih_wait_for_idle,
406 .soft_reset = vega10_ih_soft_reset,
407 .set_clockgating_state = vega10_ih_set_clockgating_state,
408 .set_powergating_state = vega10_ih_set_powergating_state,
411 static const struct amdgpu_ih_funcs vega10_ih_funcs = {
412 .get_wptr = vega10_ih_get_wptr,
413 .decode_iv = vega10_ih_decode_iv,
414 .set_rptr = vega10_ih_set_rptr
417 static void vega10_ih_set_interrupt_funcs(struct amdgpu_device *adev)
419 if (adev->irq.ih_funcs == NULL)
420 adev->irq.ih_funcs = &vega10_ih_funcs;
423 const struct amdgpu_ip_block_version vega10_ih_ip_block =
425 .type = AMD_IP_BLOCK_TYPE_IH,
429 .funcs = &vega10_ih_ip_funcs,