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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Dec 2024 16:51:05.8992 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2a729c14-15d7-430f-3f4c-08dd1a04013d X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: DB5PEPF00014B98.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB4PR08MB9261 Content-Type: text/plain; charset="utf-8" Added the panthor_perf system initialization and unplug code to allow for the handling of userspace sessions to be added in follow-up patches. Signed-off-by: Lukas Zapolskas --- drivers/gpu/drm/panthor/panthor_device.c | 7 +++ drivers/gpu/drm/panthor/panthor_device.h | 5 +- drivers/gpu/drm/panthor/panthor_perf.c | 77 ++++++++++++++++++++++++ drivers/gpu/drm/panthor/panthor_perf.h | 3 + 4 files changed, 91 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/panthor/panthor_device.c b/drivers/gpu/drm/pan= thor/panthor_device.c index 00f7b8ce935a..1a81a436143b 100644 --- a/drivers/gpu/drm/panthor/panthor_device.c +++ b/drivers/gpu/drm/panthor/panthor_device.c @@ -19,6 +19,7 @@ #include "panthor_fw.h" #include "panthor_gpu.h" #include "panthor_mmu.h" +#include "panthor_perf.h" #include "panthor_regs.h" #include "panthor_sched.h" =20 @@ -97,6 +98,7 @@ void panthor_device_unplug(struct panthor_device *ptdev) /* Now, try to cleanly shutdown the GPU before the device resources * get reclaimed. */ + panthor_perf_unplug(ptdev); panthor_sched_unplug(ptdev); panthor_fw_unplug(ptdev); panthor_mmu_unplug(ptdev); @@ -262,6 +264,10 @@ int panthor_device_init(struct panthor_device *ptdev) if (ret) goto err_unplug_fw; =20 + ret =3D panthor_perf_init(ptdev); + if (ret) + goto err_unplug_fw; + /* ~3 frames */ pm_runtime_set_autosuspend_delay(ptdev->base.dev, 50); pm_runtime_use_autosuspend(ptdev->base.dev); @@ -275,6 +281,7 @@ int panthor_device_init(struct panthor_device *ptdev) =20 err_disable_autosuspend: pm_runtime_dont_use_autosuspend(ptdev->base.dev); + panthor_perf_unplug(ptdev); panthor_sched_unplug(ptdev); =20 err_unplug_fw: diff --git a/drivers/gpu/drm/panthor/panthor_device.h b/drivers/gpu/drm/pan= thor/panthor_device.h index 636542c1dcbd..aca33d03036c 100644 --- a/drivers/gpu/drm/panthor/panthor_device.h +++ b/drivers/gpu/drm/panthor/panthor_device.h @@ -26,7 +26,7 @@ struct panthor_heap_pool; struct panthor_job; struct panthor_mmu; struct panthor_fw; -struct panthor_perfcnt; +struct panthor_perf; struct panthor_vm; struct panthor_vm_pool; =20 @@ -137,6 +137,9 @@ struct panthor_device { /** @devfreq: Device frequency scaling management data. */ struct panthor_devfreq *devfreq; =20 + /** @perf: Performance counter management data. */ + struct panthor_perf *perf; + /** @unplug: Device unplug related fields. */ struct { /** @lock: Lock used to serialize unplug operations. */ diff --git a/drivers/gpu/drm/panthor/panthor_perf.c b/drivers/gpu/drm/panth= or/panthor_perf.c index 0e3d769c1805..e0dc6c4b0cf1 100644 --- a/drivers/gpu/drm/panthor/panthor_perf.c +++ b/drivers/gpu/drm/panthor/panthor_perf.c @@ -13,6 +13,24 @@ #include "panthor_perf.h" #include "panthor_regs.h" =20 +struct panthor_perf { + /** + * @block_set: The global counter set configured onto the HW. + */ + u8 block_set; + + /** @next_session: The ID of the next session. */ + u32 next_session; + + /** @session_range: The number of sessions supported at a time. */ + struct xa_limit session_range; + + /** + * @sessions: Global map of sessions, accessed by their ID. + */ + struct xarray sessions; +}; + /** * PANTHOR_PERF_COUNTERS_PER_BLOCK - On CSF architectures pre-11.x, the nu= mber of counters * per block was hardcoded to be 64. Arch 11.0 onwards supports the PRFCNT= _FEATURES GPU register, @@ -45,3 +63,62 @@ void panthor_perf_info_init(struct panthor_device *ptdev) perf_info->shader_blocks =3D hweight64(ptdev->gpu_info.shader_present); } =20 +/** + * panthor_perf_init - Initialize the performance counter subsystem. + * @ptdev: Panthor device + * + * The performance counters require the FW interface to be available to se= tup the + * sampling ringbuffers, so this must be called only after FW is initializ= ed. + * + * Return: 0 on success, negative error code on failure. + */ +int panthor_perf_init(struct panthor_device *ptdev) +{ + struct panthor_perf *perf; + + if (!ptdev) + return -EINVAL; + + perf =3D devm_kzalloc(ptdev->base.dev, sizeof(*perf), GFP_KERNEL); + if (ZERO_OR_NULL_PTR(perf)) + return -ENOMEM; + + xa_init_flags(&perf->sessions, XA_FLAGS_ALLOC); + + /* Currently, we only support a single session at a time. */ + perf->session_range =3D (struct xa_limit) { + .min =3D 0, + .max =3D 1, + }; + + drm_info(&ptdev->base, "Performance counter subsystem initialized"); + + ptdev->perf =3D perf; + + return 0; +} + +/** + * panthor_perf_unplug - Terminate the performance counter subsystem. + * @ptdev: Panthor device. + * + * This function will terminate the performance counter control structures= and any remaining + * sessions, after waiting for any pending interrupts. + */ +void panthor_perf_unplug(struct panthor_device *ptdev) +{ + struct panthor_perf *perf =3D ptdev->perf; + + if (!perf) + return; + + if (!xa_empty(&perf->sessions)) + drm_err(&ptdev->base, + "Performance counter sessions active when unplugging the driver!"); + + xa_destroy(&perf->sessions); + + devm_kfree(ptdev->base.dev, ptdev->perf); + + ptdev->perf =3D NULL; +} diff --git a/drivers/gpu/drm/panthor/panthor_perf.h b/drivers/gpu/drm/panth= or/panthor_perf.h index cff537a370c9..90af8b18358c 100644 --- a/drivers/gpu/drm/panthor/panthor_perf.h +++ b/drivers/gpu/drm/panthor/panthor_perf.h @@ -9,4 +9,7 @@ struct panthor_device; =20 void panthor_perf_info_init(struct panthor_device *ptdev); =20 +int panthor_perf_init(struct panthor_device *ptdev); +void panthor_perf_unplug(struct panthor_device *ptdev); + #endif /* __PANTHOR_PERF_H__ */ --=20 2.25.1