/* So far, with hardware that I've seen to date, we can have: * + zero, one, or two z180 2d cores * + a3xx or a2xx 3d core, which share a common CP (the firmware * for the CP seems to implement some different PM4 packet types * but the basics of cmdstream submission are the same) * * Which means that the eventual complete "class" hierarchy, once * support for all past and present hw is in place, becomes: * + msm_gpu * + adreno_gpu * + a3xx_gpu * + a2xx_gpu * + z180_gpu
*/ struct msm_gpu_funcs { int (*get_param)(struct msm_gpu *gpu, struct msm_context *ctx,
uint32_t param, uint64_t *value, uint32_t *len); int (*set_param)(struct msm_gpu *gpu, struct msm_context *ctx,
uint32_t param, uint64_t value, uint32_t len); int (*hw_init)(struct msm_gpu *gpu);
/** * @ucode_load: Optional hook to upload fw to GEM objs
*/ int (*ucode_load)(struct msm_gpu *gpu);
int (*pm_suspend)(struct msm_gpu *gpu); int (*pm_resume)(struct msm_gpu *gpu); void (*submit)(struct msm_gpu *gpu, struct msm_gem_submit *submit); void (*flush)(struct msm_gpu *gpu, struct msm_ringbuffer *ring);
irqreturn_t (*irq)(struct msm_gpu *irq); struct msm_ringbuffer *(*active_ring)(struct msm_gpu *gpu); void (*recover)(struct msm_gpu *gpu); void (*destroy)(struct msm_gpu *gpu); #ifdefined(CONFIG_DEBUG_FS) || defined(CONFIG_DEV_COREDUMP) /* show GPU status in debugfs: */ void (*show)(struct msm_gpu *gpu, struct msm_gpu_state *state, struct drm_printer *p); /* for generation specific debugfs: */ void (*debugfs_init)(struct msm_gpu *gpu, struct drm_minor *minor); #endif /* note: gpu_busy() can assume that we have been pm_resumed */
u64 (*gpu_busy)(struct msm_gpu *gpu, unsignedlong *out_sample_rate); struct msm_gpu_state *(*gpu_state_get)(struct msm_gpu *gpu); int (*gpu_state_put)(struct msm_gpu_state *state); unsignedlong (*gpu_get_freq)(struct msm_gpu *gpu); /* note: gpu_set_freq() can assume that we have been pm_resumed */ void (*gpu_set_freq)(struct msm_gpu *gpu, struct dev_pm_opp *opp, bool suspended); struct drm_gpuvm *(*create_vm)(struct msm_gpu *gpu, struct platform_device *pdev); struct drm_gpuvm *(*create_private_vm)(struct msm_gpu *gpu, bool kernel_managed);
uint32_t (*get_rptr)(struct msm_gpu *gpu, struct msm_ringbuffer *ring);
/** * progress: Has the GPU made progress? * * Return true if GPU position in cmdstream has advanced (or changed) * since the last call. To avoid false negatives, this should account * for cmdstream that is buffered in this FIFO upstream of the CP fw.
*/ bool (*progress)(struct msm_gpu *gpu, struct msm_ringbuffer *ring);
};
/* Additional state for iommu faults: */ struct msm_gpu_fault_info {
u64 ttbr0; unsignedlong iova; int flags; constchar *type; constchar *block;
/* Information about what we think/expect is the current SMMU state, * for example expected_ttbr0 should match smmu_info.ttbr0 which * was read back from SMMU registers.
*/
phys_addr_t pgtbl_ttbr0;
u64 ptes[4]; int asid;
};
/** * struct msm_gpu_devfreq - devfreq related state
*/ struct msm_gpu_devfreq { /** devfreq: devfreq instance */ struct devfreq *devfreq;
/** lock: lock for "suspended", "busy_cycles", and "time" */ struct mutex lock;
/** * idle_freq: * * Shadow frequency used while the GPU is idle. From the PoV of * the devfreq governor, we are continuing to sample busyness and * adjust frequency while the GPU is idle, but we use this shadow * value as the GPU is actually clamped to minimum frequency while * it is inactive.
*/ unsignedlong idle_freq;
/** * boost_constraint: * * A PM QoS constraint to boost min freq for a period of time * until the boost expires.
*/ struct dev_pm_qos_request boost_freq;
/** * busy_cycles: Last busy counter value, for calculating elapsed busy * cycles since last sampling period.
*/
u64 busy_cycles;
/** time: Time of last sampling period. */
ktime_t time;
/** idle_time: Time of last transition to idle: */
ktime_t idle_time;
/** * idle_work: * * Used to delay clamping to idle freq on active->idle transition.
*/ struct msm_hrtimer_work idle_work;
/** * boost_work: * * Used to reset the boost_constraint after the boost period has * elapsed
*/ struct msm_hrtimer_work boost_work;
/** suspended: tracks if we're suspended */ bool suspended;
};
struct msm_ringbuffer *rb[MSM_GPU_MAX_RINGS]; int nr_rings;
/** * sysprof_active: * * The count of contexts that have enabled system profiling.
*/
refcount_t sysprof_active;
/** * lock: * * General lock for serializing all the gpu things. * * TODO move to per-ring locking where feasible (ie. submit/retire * path, etc)
*/ struct mutex lock;
/** * active_submits: * * The number of submitted but not yet retired submits, used to * determine transitions between active and idle. * * Protected by active_lock
*/ int active_submits;
/** * global_faults: number of GPU hangs not attributed to a particular * address space
*/ int global_faults;
void __iomem *mmio; int irq;
struct drm_gpuvm *vm;
/* Power Control: */ struct regulator *gpu_reg, *gpu_cx; struct clk_bulk_data *grp_clks; int nr_clocks; struct clk *ebi1_clk, *core_clk, *rbbmtimer_clk;
uint32_t fast_rate;
/* Hang and Inactivity Detection:
*/ #define DRM_MSM_INACTIVE_PERIOD 66 /* in ms (roughly four frames) */
#define DRM_MSM_HANGCHECK_DEFAULT_PERIOD 500 /* in ms */ #define DRM_MSM_HANGCHECK_PROGRESS_RETRIES 3 struct timer_list hangcheck_timer;
/* work for handling GPU recovery: */ struct kthread_work recover_work;
/** retire_event: notified when submits are retired: */
wait_queue_head_t retire_event;
/* work for handling active-list retiring: */ struct kthread_work retire_work;
/* worker for retire/recover: */ struct kthread_worker *worker;
struct drm_gem_object *memptrs_bo;
struct msm_gpu_devfreq devfreq;
uint32_t suspend_count;
struct msm_gpu_state *crashstate;
/* True if the hardware supports expanded apriv (a650 and newer) */ bool hw_apriv;
/** * @allow_relocs: allow relocs in SUBMIT ioctl * * Mesa won't use relocs for driver version 1.4.0 and later. This * switch-over happened early enough in mesa a6xx bringup that we * can disallow relocs for a6xx and newer.
*/ bool allow_relocs;
staticinlinebool msm_gpu_active(struct msm_gpu *gpu)
{ int i;
for (i = 0; i < gpu->nr_rings; i++) { struct msm_ringbuffer *ring = gpu->rb[i];
if (fence_after(ring->fctx->last_fence, ring->memptrs->fence)) returntrue;
}
returnfalse;
}
/* Perf-Counters: * The select_reg and select_val are just there for the benefit of the child * class that actually enables the perf counter.. but msm_gpu base class * will handle sampling/displaying the counters.
*/
/* * The number of priority levels provided by drm gpu scheduler. The * DRM_SCHED_PRIORITY_KERNEL priority level is treated specially in some * cases, so we don't use it (no need for kernel generated jobs).
*/ #define NR_SCHED_PRIORITIES (1 + DRM_SCHED_PRIORITY_LOW - DRM_SCHED_PRIORITY_HIGH)
/** @submitqueues: list of &msm_gpu_submitqueue created by userspace */ struct list_head submitqueues;
/** * @queueid: * * Counter incremented each time a submitqueue is created, used to * assign &msm_gpu_submitqueue.id
*/ int queueid;
/** * @closed: The device file associated with this context has been closed. * * Once the device is closed, any submits that have not been written * to the ring buffer are no-op'd.
*/ bool closed;
/** * @userspace_managed_vm: * * Has userspace opted-in to userspace managed VM (ie. VM_BIND) via * MSM_PARAM_EN_VM_BIND?
*/ bool userspace_managed_vm;
/** * @vm: * * The per-process GPU address-space. Do not access directly, use * msm_context_vm().
*/ struct drm_gpuvm *vm;
/** @kref: the reference count */ struct kref ref;
/** * @seqno: * * A unique per-process sequence number. Used to detect context * switches, without relying on keeping a, potentially dangling, * pointer to the previous context.
*/ int seqno;
/** * @sysprof: * * The value of MSM_PARAM_SYSPROF set by userspace. This is * intended to be used by system profiling tools like Mesa's * pps-producer (perfetto), and restricted to CAP_SYS_ADMIN. * * Setting a value of 1 will preserve performance counters across * context switches. Setting a value of 2 will in addition * suppress suspend. (Performance counters lose state across * power collapse, which is undesirable for profiling in some * cases.) * * The value automatically reverts to zero when the drm device * file is closed.
*/ int sysprof;
/** * @comm: Overridden task comm, see MSM_PARAM_COMM * * Accessed under msm_gpu::lock
*/ char *comm;
/** * @cmdline: Overridden task cmdline, see MSM_PARAM_CMDLINE * * Accessed under msm_gpu::lock
*/ char *cmdline;
/** * @elapsed: * * The total (cumulative) elapsed time GPU was busy with rendering * from this context in ns.
*/
uint64_t elapsed_ns;
/** * @cycles: * * The total (cumulative) GPU cycles elapsed attributed to this * context.
*/
uint64_t cycles;
/** * @entities: * * Table of per-priority-level sched entities used by submitqueues * associated with this &drm_file. Because some userspace apps * make assumptions about rendering from multiple gl contexts * (of the same priority) within the process happening in FIFO * order without requiring any fencing beyond MakeCurrent(), we * create at most one &drm_sched_entity per-process per-priority- * level.
*/ struct drm_sched_entity *entities[NR_SCHED_PRIORITIES * MSM_GPU_MAX_RINGS];
/** * @ctx_mem: * * Total amount of memory of GEM buffers with handles attached for * this context.
*/
atomic64_t ctx_mem;
};
/** * msm_context_is_vm_bind() - has userspace opted in to VM_BIND? * * @ctx: the drm_file context * * See MSM_PARAM_EN_VM_BIND. If userspace is managing the VM, it can * do sparse binding including having multiple, potentially partial, * mappings in the VM. Therefore certain legacy uabi (ie. GET_IOVA, * SET_IOVA) are rejected because they don't have a sensible meaning.
*/ staticinlinebool
msm_context_is_vmbind(struct msm_context *ctx)
{ return ctx->userspace_managed_vm;
}
/** * msm_gpu_convert_priority - Map userspace priority to ring # and sched priority * * @gpu: the gpu instance * @prio: the userspace priority level * @ring_nr: [out] the ringbuffer the userspace priority maps to * @sched_prio: [out] the gpu scheduler priority level which the userspace * priority maps to * * With drm/scheduler providing it's own level of prioritization, our total * number of available priority levels is (nr_rings * NR_SCHED_PRIORITIES). * Each ring is associated with it's own scheduler instance. However, our * UABI is that lower numerical values are higher priority. So mapping the * single userspace priority level into ring_nr and sched_prio takes some * care. The userspace provided priority (when a submitqueue is created) * is mapped to ring nr and scheduler priority as such: * * ring_nr = userspace_prio / NR_SCHED_PRIORITIES * sched_prio = NR_SCHED_PRIORITIES - * (userspace_prio % NR_SCHED_PRIORITIES) - 1 * * This allows generations without preemption (nr_rings==1) to have some * amount of prioritization, and provides more priority levels for gens * that do have preemption.
*/ staticinlineint msm_gpu_convert_priority(struct msm_gpu *gpu, int prio, unsigned *ring_nr, enum drm_sched_priority *sched_prio)
{ unsigned rn, sp;
rn = div_u64_rem(prio, NR_SCHED_PRIORITIES, &sp);
/* invert sched priority to map to higher-numeric-is-higher- * priority convention
*/
sp = NR_SCHED_PRIORITIES - sp - 1;
if (rn >= gpu->nr_rings) return -EINVAL;
*ring_nr = rn;
*sched_prio = sp;
return 0;
}
/** * struct msm_gpu_submitqueues - Userspace created context. * * A submitqueue is associated with a gl context or vk queue (or equiv) * in userspace. * * @id: userspace id for the submitqueue, unique within the drm_file * @flags: userspace flags for the submitqueue, specified at creation * (currently unusued) * @ring_nr: the ringbuffer used by this submitqueue, which is determined * by the submitqueue's priority * @faults: the number of GPU hangs associated with this submitqueue * @last_fence: the sequence number of the last allocated fence (for error * checking) * @ctx: the per-drm_file context associated with the submitqueue (ie. * which set of pgtables do submits jobs associated with the * submitqueue use) * @node: node in the context's list of submitqueues * @fence_idr: maps fence-id to dma_fence for userspace visible fence * seqno, protected by submitqueue lock * @idr_lock: for serializing access to fence_idr * @lock: submitqueue lock for serializing submits on a queue * @ref: reference count * @entity: the submit job-queue
*/ struct msm_gpu_submitqueue { int id;
u32 flags;
u32 ring_nr; int faults;
uint32_t last_fence; struct msm_context *ctx; struct list_head node; struct idr fence_idr; struct spinlock idr_lock; struct mutex lock; struct kref ref; struct drm_sched_entity *entity;
/** @_vm_bind_entity: used for @entity pointer for VM_BIND queues */ struct drm_sched_entity _vm_bind_entity[0];
};
/* * Why not a readq here? Two reasons: 1) many of the LO registers are * not quad word aligned and 2) the GPU hardware designers have a bit * of a history of putting registers where they fit, especially in * spins. The longer a GPU family goes the higher the chance that * we'll get burned. We could do a series of validity checks if we * wanted to, but really is a readq() that much better? Nah.
*/
/* * For some lo/hi registers (like perfcounters), the hi value is latched * when the lo is read, so make sure to read the lo first to trigger * that
*/
val = (u64) readl(gpu->mmio + (reg << 2));
val |= ((u64) readl(gpu->mmio + ((reg + 1) << 2)) << 32);
/* * Simple macro to semi-cleanly add the MAP_PRIV flag for targets that can * support expanded privileges
*/ #define check_apriv(gpu, flags) \
(((gpu)->hw_apriv ? MSM_BO_MAP_PRIV : 0) | (flags))
#endif/* __MSM_GPU_H__ */
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