1 // SPDX-License-Identifier: GPL-2.0-only OR MIT
21 #include <linux/dma-mapping.h>
37  * pvr_device_reg_init() - Initialize kernel access to a PowerVR device's
39  * @pvr_dev: Target PowerVR device.
41  * Sets struct pvr_device->regs.
55 	struct platform_device *plat_dev = to_platform_device(drm_dev->dev);  in pvr_device_reg_init()
59 	pvr_dev->regs_resource = NULL;  in pvr_device_reg_init()
60 	pvr_dev->regs = NULL;  in pvr_device_reg_init()
64 		return dev_err_probe(drm_dev->dev, PTR_ERR(regs),  in pvr_device_reg_init()
65 				     "failed to ioremap gpu registers\n");  in pvr_device_reg_init()
67 	pvr_dev->regs = regs;  in pvr_device_reg_init()
68 	pvr_dev->regs_resource = regs_resource;  in pvr_device_reg_init()
74  * pvr_device_clk_init() - Initialize clocks required by a PowerVR device
75  * @pvr_dev: Target PowerVR device.
77  * Sets struct pvr_device->core_clk, struct pvr_device->sys_clk and
78  * struct pvr_device->mem_clk.
80  * Three clocks are required by the PowerVR device: core, sys and mem. On
101 	core_clk = devm_clk_get(drm_dev->dev, "core");  in pvr_device_clk_init()
103 		return dev_err_probe(drm_dev->dev, PTR_ERR(core_clk),  in pvr_device_clk_init()
106 	sys_clk = devm_clk_get_optional(drm_dev->dev, "sys");  in pvr_device_clk_init()
108 		return dev_err_probe(drm_dev->dev, PTR_ERR(sys_clk),  in pvr_device_clk_init()
111 	mem_clk = devm_clk_get_optional(drm_dev->dev, "mem");  in pvr_device_clk_init()
113 		return dev_err_probe(drm_dev->dev, PTR_ERR(mem_clk),  in pvr_device_clk_init()
116 	pvr_dev->core_clk = core_clk;  in pvr_device_clk_init()
117 	pvr_dev->sys_clk = sys_clk;  in pvr_device_clk_init()
118 	pvr_dev->mem_clk = mem_clk;  in pvr_device_clk_init()
124  * pvr_device_process_active_queues() - Process all queue related events.
125  * @pvr_dev: PowerVR device to check
135 	mutex_lock(&pvr_dev->queues.lock);  in pvr_device_process_active_queues()
138 	 * active after we're done processing them are re-inserted to  in pvr_device_process_active_queues()
141 	list_splice_init(&pvr_dev->queues.active, &active_queues);  in pvr_device_process_active_queues()
146 	mutex_unlock(&pvr_dev->queues.lock);  in pvr_device_process_active_queues()
156 	 * when the GPU is receiving a massive amount of short jobs.  in pvr_device_irq_thread_handler()
161 		if (pvr_dev->fw_dev.booted) {  in pvr_device_irq_thread_handler()
167 		pm_runtime_mark_last_busy(from_pvr_device(pvr_dev)->dev);  in pvr_device_irq_thread_handler()
182 		return IRQ_NONE; /* Spurious IRQ - ignore. */  in pvr_device_irq_handler()
192  * pvr_device_irq_init() - Initialise IRQ required by a PowerVR device
193  * @pvr_dev: Target PowerVR device.
204 	struct platform_device *plat_dev = to_platform_device(drm_dev->dev);  in pvr_device_irq_init()
206 	init_waitqueue_head(&pvr_dev->kccb.rtn_q);  in pvr_device_irq_init()
208 	pvr_dev->irq = platform_get_irq(plat_dev, 0);  in pvr_device_irq_init()
209 	if (pvr_dev->irq < 0)  in pvr_device_irq_init()
210 		return pvr_dev->irq;  in pvr_device_irq_init()
216 	return request_threaded_irq(pvr_dev->irq, pvr_device_irq_handler,  in pvr_device_irq_init()
218 				    IRQF_SHARED, "gpu", pvr_dev);  in pvr_device_irq_init()
222  * pvr_device_irq_fini() - Deinitialise IRQ required by a PowerVR device
223  * @pvr_dev: Target PowerVR device.
228 	free_irq(pvr_dev->irq, pvr_dev);  in pvr_device_irq_fini()
232  * pvr_build_firmware_filename() - Construct a PowerVR firmware filename
233  * @pvr_dev: Target PowerVR device.
237  * A PowerVR firmware filename consists of three parts separated by underscores
241  * a 'v' prefix, e.g. powervr/rogue_4.40.2.51_v1.fw.
254 	struct pvr_gpu_id *gpu_id = &pvr_dev->gpu_id;  in pvr_build_firmware_filename()
256 	return kasprintf(GFP_KERNEL, "%s_%d.%d.%d.%d_v%d.fw", base, gpu_id->b,  in pvr_build_firmware_filename()
257 			 gpu_id->v, gpu_id->n, gpu_id->c, major);  in pvr_build_firmware_filename()
265 	release_firmware(pvr_dev->fw_dev.firmware);  in pvr_release_firmware()
269  * pvr_request_firmware() - Load firmware for a PowerVR device
270  * @pvr_dev: Target PowerVR device.
282 	struct drm_device *drm_dev = &pvr_dev->base;  in pvr_request_firmware()
287 	filename = pvr_build_firmware_filename(pvr_dev, "powervr/rogue",  in pvr_request_firmware()
290 		return -ENOMEM;  in pvr_request_firmware()
296 	err = request_firmware(&fw, filename, pvr_dev->base.dev);  in pvr_request_firmware()
306 	pvr_dev->fw_dev.firmware = fw;  in pvr_request_firmware()
308 	return devm_add_action_or_reset(drm_dev->dev, pvr_release_firmware, pvr_dev);  in pvr_request_firmware()
317  * pvr_load_gpu_id() - Load a PowerVR device's GPU ID (BVNC) from control registers.
321  * @pvr_dev: Target PowerVR device.
326 	struct pvr_gpu_id *gpu_id = &pvr_dev->gpu_id;  in pvr_load_gpu_id()
335 	gpu_id->b = PVR_CR_FIELD_GET(bvnc, CORE_ID__PBVNC__BRANCH_ID);  in pvr_load_gpu_id()
336 	if (gpu_id->b != 0) {  in pvr_load_gpu_id()
337 		gpu_id->v = PVR_CR_FIELD_GET(bvnc, CORE_ID__PBVNC__VERSION_ID);  in pvr_load_gpu_id()
338 		gpu_id->n = PVR_CR_FIELD_GET(bvnc, CORE_ID__PBVNC__NUMBER_OF_SCALABLE_UNITS);  in pvr_load_gpu_id()
339 		gpu_id->c = PVR_CR_FIELD_GET(bvnc, CORE_ID__PBVNC__CONFIG_ID);  in pvr_load_gpu_id()
345 		gpu_id->b = PVR_CR_FIELD_GET(core_rev, CORE_REVISION_MAJOR);  in pvr_load_gpu_id()
346 		gpu_id->v = PVR_CR_FIELD_GET(core_rev, CORE_REVISION_MINOR);  in pvr_load_gpu_id()
347 		gpu_id->n = FIELD_GET(0xFF00, core_id_config);  in pvr_load_gpu_id()
348 		gpu_id->c = FIELD_GET(0x00FF, core_id_config);  in pvr_load_gpu_id()
353  * pvr_set_dma_info() - Set PowerVR device DMA information
354  * @pvr_dev: Target PowerVR device.
356  * Sets the DMA mask and max segment size for the PowerVR device.
377 	err = dma_set_mask(drm_dev->dev, DMA_BIT_MASK(phys_bus_width));  in pvr_set_dma_info()
383 	dma_set_max_seg_size(drm_dev->dev, UINT_MAX);  in pvr_set_dma_info()
389  * pvr_device_gpu_init() - GPU-specific initialization for a PowerVR device
390  * @pvr_dev: Target PowerVR device.
397  *  4. Setup the device-scoped memory context, and
402  *  * -%ENODEV if the GPU is not supported,
423 		pvr_dev->fw_dev.processor_type = PVR_FW_PROCESSOR_TYPE_META;  in pvr_device_gpu_init()
425 		pvr_dev->fw_dev.processor_type = PVR_FW_PROCESSOR_TYPE_MIPS;  in pvr_device_gpu_init()
427 		pvr_dev->fw_dev.processor_type = PVR_FW_PROCESSOR_TYPE_RISCV;  in pvr_device_gpu_init()
429 		return -EINVAL;  in pvr_device_gpu_init()
437 	if (pvr_dev->fw_dev.processor_type != PVR_FW_PROCESSOR_TYPE_MIPS) {  in pvr_device_gpu_init()
438 		pvr_dev->kernel_vm_ctx = pvr_vm_create_context(pvr_dev, false);  in pvr_device_gpu_init()
439 		if (IS_ERR(pvr_dev->kernel_vm_ctx))  in pvr_device_gpu_init()
440 			return PTR_ERR(pvr_dev->kernel_vm_ctx);  in pvr_device_gpu_init()
450 	if (pvr_dev->fw_dev.processor_type != PVR_FW_PROCESSOR_TYPE_MIPS) {  in pvr_device_gpu_init()
451 		pvr_vm_context_put(pvr_dev->kernel_vm_ctx);  in pvr_device_gpu_init()
452 		pvr_dev->kernel_vm_ctx = NULL;  in pvr_device_gpu_init()
459  * pvr_device_gpu_fini() - GPU-specific deinitialization for a PowerVR device
460  * @pvr_dev: Target PowerVR device.
467 	if (pvr_dev->fw_dev.processor_type != PVR_FW_PROCESSOR_TYPE_MIPS) {  in pvr_device_gpu_fini()
468 		WARN_ON(!pvr_vm_context_put(pvr_dev->kernel_vm_ctx));  in pvr_device_gpu_fini()
469 		pvr_dev->kernel_vm_ctx = NULL;  in pvr_device_gpu_fini()
474  * pvr_device_init() - Initialize a PowerVR device
475  * @pvr_dev: Target PowerVR device.
479  * occurs will be de-initialized before returning.
496 	struct device *dev = drm_dev->dev;  in pvr_device_init()
503 	err = pvr_device_params_init(&pvr_dev->params);  in pvr_device_init()
512 	/* Explicitly power the GPU so we can access control registers before the FW is booted. */  in pvr_device_init()
522 	/* Perform GPU-specific initialization steps. */  in pvr_device_init()
545  * pvr_device_fini() - Deinitialize a PowerVR device
546  * @pvr_dev: Target PowerVR device.
592  * pvr_device_has_feature() - Look up device feature based on feature definition