disp: msm: sde: add VM files for SDE
Add VM layer files to handle VM specific operations for primary and secondary VM's. They interact with Hypervisor RM modules to LEND/ACCEPT/RELEASE/RECLAIM HW resources. They also handle notifications for each of the above Hyp RM operations to acquire and update the SDE software states. Change-Id: I5982f4bf56550dc464797c62cb356be39925b21c Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
This commit is contained in:
Jeykumar Sankaran
294
msm/sde/sde_vm_primary.c
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294
msm/sde/sde_vm_primary.c
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2020, The Linux Foundation. All rights reserved.
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*/
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#include <linux/notifier.h>
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#include <linux/haven/hh_rm_drv.h>
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#include <linux/haven/hh_irq_lend.h>
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#include <linux/haven/hh_mem_notifier.h>
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#include "sde_kms.h"
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#include "sde_vm.h"
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#include "sde_vm_common.h"
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#define to_vm_primary(vm) ((struct sde_vm_primary *)vm)
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static bool sde_vm_owns_hw(struct sde_kms *sde_kms)
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{
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struct sde_vm_primary *sde_vm;
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bool owns_irq, owns_mem_io;
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sde_vm = to_vm_primary(sde_kms->vm);
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owns_irq = !atomic_read(&sde_vm->base.n_irq_lent);
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owns_mem_io = (sde_vm->base.io_mem_handle < 0);
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return (owns_irq & owns_mem_io);
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}
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void sde_vm_irq_release_notification_handler(void *req, enum hh_irq_label label)
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{
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struct sde_vm_primary *sde_vm;
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int rc = 0;
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if (!req) {
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SDE_ERROR("invalid data on release notificaiton\n");
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return;
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}
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sde_vm = to_vm_primary(req);
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mutex_lock(&sde_vm->base.vm_res_lock);
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rc = hh_irq_reclaim(label);
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if (rc) {
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SDE_ERROR("failed to reclaim irq label: %d\n", label);
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goto notify_end;
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}
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/**
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* Skipping per IRQ label verification since IRQ's are MDSS centric.
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* Need to enable addition verifications when per-display IRQ's are
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* supported.
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*/
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atomic_dec(&sde_vm->base.n_irq_lent);
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SDE_INFO("irq reclaim succeeded for label: %d\n", label);
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notify_end:
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mutex_unlock(&sde_vm->base.vm_res_lock);
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}
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static void sde_vm_mem_release_notification_handler(
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enum hh_mem_notifier_tag tag, unsigned long notif_type,
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void *entry_data, void *notif_msg)
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{
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struct hh_rm_notif_mem_released_payload *payload;
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struct sde_vm_primary *sde_vm;
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struct sde_kms *sde_kms;
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int rc = 0;
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if (notif_type != HH_RM_NOTIF_MEM_RELEASED ||
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tag != HH_MEM_NOTIFIER_TAG_DISPLAY)
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return;
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if (!entry_data || !notif_msg)
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return;
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payload = (struct hh_rm_notif_mem_released_payload *)notif_msg;
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sde_vm = (struct sde_vm_primary *)entry_data;
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sde_kms = sde_vm->base.sde_kms;
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mutex_lock(&sde_vm->base.vm_res_lock);
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if (payload->mem_handle != sde_vm->base.io_mem_handle)
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goto notify_end;
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rc = hh_rm_mem_reclaim(payload->mem_handle, 0);
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if (rc) {
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SDE_ERROR("failed to reclaim IO memory, rc=%d\n", rc);
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goto notify_end;
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}
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sde_vm->base.io_mem_handle = -1;
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SDE_INFO("mem reclaim succeeded for tag: %d\n", tag);
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notify_end:
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mutex_unlock(&sde_vm->base.vm_res_lock);
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}
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static int _sde_vm_lend_notify_registers(struct sde_vm *vm,
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struct msm_io_res *io_res)
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{
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struct sde_vm_primary *sde_vm;
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struct hh_acl_desc *acl_desc;
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struct hh_sgl_desc *sgl_desc;
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struct hh_notify_vmid_desc *vmid_desc;
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hh_memparcel_handle_t mem_handle;
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hh_vmid_t trusted_vmid;
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int rc = 0;
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sde_vm = to_vm_primary(vm);
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acl_desc = sde_vm_populate_acl(HH_TRUSTED_VM);
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if (IS_ERR(acl_desc)) {
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SDE_ERROR("failed to populate acl descriptor, rc = %d\n",
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PTR_ERR(acl_desc));
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return rc;
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}
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sgl_desc = sde_vm_populate_sgl(io_res);
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if (IS_ERR_OR_NULL(sgl_desc)) {
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SDE_ERROR("failed to populate sgl descriptor, rc = %d\n",
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PTR_ERR(sgl_desc));
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goto sgl_fail;
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}
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rc = hh_rm_mem_lend(HH_RM_MEM_TYPE_IO, 0, SDE_VM_MEM_LABEL,
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acl_desc, sgl_desc, NULL, &mem_handle);
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if (rc) {
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SDE_ERROR("hyp lend failed with error, rc: %d\n", rc);
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goto fail;
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}
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hh_rm_get_vmid(HH_TRUSTED_VM, &trusted_vmid);
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vmid_desc = sde_vm_populate_vmid(trusted_vmid);
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rc = hh_rm_mem_notify(mem_handle, HH_RM_MEM_NOTIFY_RECIPIENT,
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HH_MEM_NOTIFIER_TAG_DISPLAY, vmid_desc);
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if (rc) {
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SDE_ERROR("hyp mem notify failed, rc = %d\n", rc);
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goto notify_fail;
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}
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sde_vm->base.io_mem_handle = mem_handle;
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SDE_INFO("IO memory lend suceeded for tag: %d\n",
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HH_MEM_NOTIFIER_TAG_DISPLAY);
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notify_fail:
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kfree(vmid_desc);
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fail:
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kfree(sgl_desc);
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sgl_fail:
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kfree(acl_desc);
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return rc;
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}
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static int _sde_vm_lend_irq(struct sde_vm *vm, struct msm_io_res *io_res)
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{
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struct sde_vm_primary *sde_vm;
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struct sde_vm_irq_desc *irq_desc;
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int i, rc = 0;
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sde_vm = to_vm_primary(vm);
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irq_desc = sde_vm_populate_irq(io_res);
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for (i = 0; i < irq_desc->n_irq; i++) {
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struct sde_vm_irq_entry *entry = &irq_desc->irq_entries[i];
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rc = hh_irq_lend(entry->label, HH_TRUSTED_VM, entry->irq,
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sde_vm_irq_release_notification_handler,
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sde_vm);
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if (rc) {
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SDE_ERROR("irq lend failed for irq label: %d, rc=%d\n",
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entry->label, rc);
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hh_irq_reclaim(entry->label);
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return rc;
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}
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SDE_INFO("vm lend suceeded for IRQ label: %d\n", entry->label);
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}
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// cache the irq list for validation during release
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sde_vm->irq_desc = irq_desc;
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atomic_set(&sde_vm->base.n_irq_lent, sde_vm->irq_desc->n_irq);
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return rc;
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}
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static int _sde_vm_release(struct sde_kms *kms)
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{
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struct msm_io_res io_res;
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struct sde_vm_primary *sde_vm;
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int rc = 0;
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if (!kms->vm)
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return 0;
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sde_vm = to_vm_primary(kms->vm);
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INIT_LIST_HEAD(&io_res.mem);
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INIT_LIST_HEAD(&io_res.irq);
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rc = sde_vm_get_resources(kms, &io_res);
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if (rc) {
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SDE_ERROR("fail to get resources\n");
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goto assign_fail;
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}
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mutex_lock(&sde_vm->base.vm_res_lock);
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rc = _sde_vm_lend_notify_registers(kms->vm, &io_res);
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if (rc) {
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SDE_ERROR("fail to lend notify resources\n");
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goto assign_fail;
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}
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rc = _sde_vm_lend_irq(kms->vm, &io_res);
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if (rc) {
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SDE_ERROR("failed to lend irq's\n");
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goto assign_fail;
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}
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assign_fail:
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sde_vm_free_resources(&io_res);
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mutex_unlock(&sde_vm->base.vm_res_lock);
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return rc;
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}
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static void _sde_vm_deinit(struct sde_kms *sde_kms, struct sde_vm_ops *ops)
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{
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struct sde_vm_primary *sde_vm;
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if (!sde_kms->vm)
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return;
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memset(ops, 0, sizeof(*ops));
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sde_vm = to_vm_primary(sde_kms->vm);
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if (sde_vm->base.mem_notification_cookie)
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hh_mem_notifier_unregister(
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sde_vm->base.mem_notification_cookie);
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if (sde_vm->irq_desc)
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sde_vm_free_irq(sde_vm->irq_desc);
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kfree(sde_vm);
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}
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static void _sde_vm_set_ops(struct sde_vm_ops *ops)
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{
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memset(ops, 0, sizeof(*ops));
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ops->vm_release = _sde_vm_release;
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ops->vm_owns_hw = sde_vm_owns_hw;
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ops->vm_deinit = _sde_vm_deinit;
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}
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int sde_vm_primary_init(struct sde_kms *kms, struct sde_vm_ops *ops)
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{
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struct sde_vm_primary *sde_vm;
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void *cookie;
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int rc = 0;
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sde_vm = kzalloc(sizeof(*sde_vm), GFP_KERNEL);
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if (!sde_vm)
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return -ENOMEM;
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_sde_vm_set_ops(ops);
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cookie = hh_mem_notifier_register(HH_MEM_NOTIFIER_TAG_DISPLAY,
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sde_vm_mem_release_notification_handler, sde_vm);
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if (!cookie) {
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SDE_ERROR("fails to register RM mem release notifier\n");
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rc = -EINVAL;
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goto init_fail;
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}
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sde_vm->base.mem_notification_cookie = cookie;
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sde_vm->base.sde_kms = kms;
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sde_vm->base.io_mem_handle = -1; // 0 is a valid handle
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kms->vm = &sde_vm->base;
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mutex_init(&sde_vm->base.vm_res_lock);
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return 0;
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init_fail:
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_sde_vm_deinit(kms, ops);
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return rc;
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}
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