2 // CCI Cache Coherent Interconnect PMU driver
6 #include <linux/arm-cci.h>
19 #define DRIVER_NAME		"ARM-CCI PMU"
165  * Instead of an event id to monitor CCI cycles, a dedicated counter is
166  * provided. Use 0xff to represent CCI cycles and hope that no future revisions
177  * CCI PMU event id is an 8-bit value made of two parts - bits 7:5 for one of 8
638  * Program the CCI PMU counters which have PERF_HES_ARCH set
752  * For all counters on the CCI-PMU, disable any 'enabled' counters,
791  * by the cci
837 		dev_err(&pmu_device->dev, "no irqs for CCI PMUs defined\n");  in pmu_request_irq()
842 	 * Register all available CCI PMU interrupts. In the interrupt handler  in pmu_request_irq()
850 				"arm-cci-pmu", cci_pmu);  in pmu_request_irq()
852 			dev_err(&pmu_device->dev, "unable to request IRQ%d for ARM CCI PMU counters\n",  in pmu_request_irq()
883 		dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);  in pmu_read_counter()
921  * CCI-500/CCI-550 has advanced power saving policies, which could gate the
944  * We choose an event which for CCI-5xx is guaranteed not to count.
1010 	 * The CCI PMU counters have a period of 2^32. To account for the  in pmu_event_set_period()
1019 	 * CCI PMU uses PERF_HES_ARCH to keep track of the counters, whose  in pmu_event_set_period()
1150 		dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);  in cci_pmu_start()
1176 		dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);  in cci_pmu_stop()
1236 	 * Reject groups spanning multiple HW PMUs (e.g. CPU + CCI). The  in validate_event()
1557 		.compatible = "arm,cci-400-pmu",
1561 		.compatible = "arm,cci-400-pmu,r0",
1565 		.compatible = "arm,cci-400-pmu,r1",
1571 		.compatible = "arm,cci-500-pmu,r0",
1575 		.compatible = "arm,cci-550-pmu,r0",
1613 			 "DEPRECATED compatible property, requires secure access to CCI registers");  in cci_pmu_alloc()
1617 		dev_warn(dev, "CCI PMU version not supported\n");  in cci_pmu_alloc()
1655 	 * CCI PMU has one overflow interrupt per counter; but some may be tied  in cci_pmu_probe()
1687 				  "perf/arm/cci:online", NULL,  in cci_pmu_probe()
1727 MODULE_DESCRIPTION("ARM CCI PMU support");