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author	Thorsten Leemhuis <fedora@leemhuis.info>	2021-03-11 16:09:52 +0100
committer	Thorsten Leemhuis <fedora@leemhuis.info>	2021-03-11 16:09:52 +0100
commit	9d53a3102caf03deb8e8328dd586708b5328b853 (patch)
tree	d40c062e31c221a0be5cf8b9d78be07aae1e64fc /configs/fedora/generic/CONFIG_USB_HWA_HCD
parent	7dd617370e80569352260f55e75af91be4f5b6d2 (diff)
download	kernel-9d53a3102caf03deb8e8328dd586708b5328b853.tar.gz kernel-9d53a3102caf03deb8e8328dd586708b5328b853.tar.xz kernel-9d53a3102caf03deb8e8328dd586708b5328b853.zip

Linux v5.10.23kernel-5.10.23-250.vanilla.knurd.1.fc32

Diffstat (limited to 'configs/fedora/generic/CONFIG_USB_HWA_HCD')

0 files changed, 0 insertions, 0 deletions

/* * SN Platform GRU Driver * * FILE OPERATIONS & DRIVER INITIALIZATION * * This file supports the user system call for file open, close, mmap, etc. * This also incudes the driver initialization code. * * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/slab.h> #include <linux/mm.h> #include <linux/io.h> #include <linux/smp_lock.h> #include <linux/spinlock.h> #include <linux/device.h> #include <linux/miscdevice.h> #include <linux/interrupt.h> #include <linux/proc_fs.h> #include <linux/uaccess.h> #include <asm/uv/uv.h> #include "gru.h" #include "grulib.h" #include "grutables.h" #include <asm/uv/uv_hub.h> #include <asm/uv/uv_mmrs.h> struct gru_blade_state *gru_base[GRU_MAX_BLADES] __read_mostly; unsigned long gru_start_paddr __read_mostly; unsigned long gru_end_paddr __read_mostly; unsigned int gru_max_gids __read_mostly; struct gru_stats_s gru_stats; /* Guaranteed user available resources on each node */ static int max_user_cbrs, max_user_dsr_bytes; static struct file_operations gru_fops; static struct miscdevice gru_miscdev; /* * gru_vma_close * * Called when unmapping a device mapping. Frees all gru resources * and tables belonging to the vma. */ static void gru_vma_close(struct vm_area_struct *vma) { struct gru_vma_data *vdata; struct gru_thread_state *gts; struct list_head *entry, *next; if (!vma->vm_private_data) return; vdata = vma->vm_private_data; vma->vm_private_data = NULL; gru_dbg(grudev, "vma %p, file %p, vdata %p\n", vma, vma->vm_file, vdata); list_for_each_safe(entry, next, &vdata->vd_head) { gts = list_entry(entry, struct gru_thread_state, ts_next); list_del(&gts->ts_next); mutex_lock(&gts->ts_ctxlock); if (gts->ts_gru) gru_unload_context(gts, 0); mutex_unlock(&gts->ts_ctxlock); gts_drop(gts); } kfree(vdata); STAT(vdata_free); } /* * gru_file_mmap * * Called when mmaping the device. Initializes the vma with a fault handler * and private data structure necessary to allocate, track, and free the * underlying pages. */ static int gru_file_mmap(struct file *file, struct vm_area_struct *vma) { if ((vma->vm_flags & (VM_SHARED | VM_WRITE)) != (VM_SHARED | VM_WRITE)) return -EPERM; if (vma->vm_start & (GRU_GSEG_PAGESIZE - 1) || vma->vm_end & (GRU_GSEG_PAGESIZE - 1)) return -EINVAL; vma->vm_flags |= (VM_IO | VM_DONTCOPY | VM_LOCKED | VM_DONTEXPAND | VM_PFNMAP | VM_RESERVED); vma->vm_page_prot = PAGE_SHARED; vma->vm_ops = &gru_vm_ops; vma->vm_private_data = gru_alloc_vma_data(vma, 0); if (!vma->vm_private_data) return -ENOMEM; gru_dbg(grudev, "file %p, vaddr 0x%lx, vma %p, vdata %p\n", file, vma->vm_start, vma, vma->vm_private_data); return 0; } /* * Create a new GRU context */ static int gru_create_new_context(unsigned long arg) { struct gru_create_context_req req; struct vm_area_struct *vma; struct gru_vma_data *vdata; int ret = -EINVAL; if (copy_from_user(&req, (void __user *)arg, sizeof(req))) return -EFAULT; if (req.data_segment_bytes == 0 || req.data_segment_bytes > max_user_dsr_bytes) return -EINVAL; if (!req.control_blocks || !req.maximum_thread_count || req.control_blocks > max_user_cbrs) return -EINVAL; if (!(req.options & GRU_OPT_MISS_MASK)) req.options |= GRU_OPT_MISS_FMM_INTR; down_write(&current->mm->mmap_sem); vma = gru_find_vma(req.gseg); if (vma) { vdata = vma->vm_private_data; vdata->vd_user_options = req.options; vdata->vd_dsr_au_count = GRU_DS_BYTES_TO_AU(req.data_segment_bytes); vdata->vd_cbr_au_count = GRU_CB_COUNT_TO_AU(req.control_blocks); ret = 0; } up_write(&current->mm->mmap_sem); return ret; } /* * Get GRU configuration info (temp - for emulator testing) */ static long gru_get_config_info(unsigned long arg) { struct gru_config_info info; int nodesperblade; if (num_online_nodes() > 1 && (uv_node_to_blade_id(1) == uv_node_to_blade_id(0))) nodesperblade = 2; else nodesperblade = 1; info.cpus = num_online_cpus(); info.nodes = num_online_nodes(); info.blades = info.nodes / nodesperblade; info.chiplets = GRU_CHIPLETS_PER_BLADE * info.blades; if (copy_to_user((void __user *)arg, &info, sizeof(info))) return -EFAULT; return 0; } /* * Get GRU chiplet status */ static long gru_get_chiplet_status(unsigned long arg) { struct gru_state *gru; struct gru_chiplet_info info; if (copy_from_user(&info, (void __user *)arg, sizeof(info))) return -EFAULT; if (info.node == -1) info.node = numa_node_id(); if (info.node >= num_possible_nodes() || info.chiplet >= GRU_CHIPLETS_PER_HUB || info.node < 0 || info.chiplet < 0) return -EINVAL; info.blade = uv_node_to_blade_id(info.node); gru = get_gru(info.blade, info.chiplet); info.total_dsr_bytes = GRU_NUM_DSR_BYTES; info.total_cbr = GRU_NUM_CB; info.total_user_dsr_bytes = GRU_NUM_DSR_BYTES - gru->gs_reserved_dsr_bytes; info.total_user_cbr = GRU_NUM_CB - gru->gs_reserved_cbrs; info.free_user_dsr_bytes = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES; info.free_user_cbr = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE; if (copy_to_user((void __user *)arg, &info, sizeof(info))) return -EFAULT; return 0; } /* * gru_file_unlocked_ioctl * * Called to update file attributes via IOCTL calls. */ static long gru_file_unlocked_ioctl(struct file *file, unsigned int req, unsigned long arg) { int err = -EBADRQC; gru_dbg(grudev, "file %p\n", file); switch (req) { case GRU_CREATE_CONTEXT: err = gru_create_new_context(arg); break; case GRU_SET_TASK_SLICE: err = gru_set_task_slice(arg); break; case GRU_USER_GET_EXCEPTION_DETAIL: err = gru_get_exception_detail(arg); break; case GRU_USER_UNLOAD_CONTEXT: err = gru_user_unload_context(arg); break; case GRU_GET_CHIPLET_STATUS: err = gru_get_chiplet_status(arg); break; case GRU_USER_FLUSH_TLB: err = gru_user_flush_tlb(arg); break; case GRU_USER_CALL_OS: err = gru_handle_user_call_os(arg); break; case GRU_GET_CONFIG_INFO: err = gru_get_config_info(arg); break; } return err; } /* * Called at init time to build tables for all GRUs that are present in the * system. */ static void gru_init_chiplet(struct gru_state *gru, unsigned long paddr, void *vaddr, int nid, int bid, int grunum) { spin_lock_init(&gru->gs_lock); spin_lock_init(&gru->gs_asid_lock); gru->gs_gru_base_paddr = paddr; gru->gs_gru_base_vaddr = vaddr; gru->gs_gid = bid * GRU_CHIPLETS_PER_BLADE + grunum; gru->gs_blade = gru_base[bid]; gru->gs_blade_id = bid; gru->gs_cbr_map = (GRU_CBR_AU == 64) ? ~0 : (1UL << GRU_CBR_AU) - 1; gru->gs_dsr_map = (1UL << GRU_DSR_AU) - 1; gru->gs_asid_limit = MAX_ASID; gru_tgh_flush_init(gru); if (gru->gs_gid >= gru_max_gids) gru_max_gids = gru->gs_gid + 1; gru_dbg(grudev, "bid %d, nid %d, gid %d, vaddr %p (0x%lx)\n", bid, nid, gru->gs_gid, gru->gs_gru_base_vaddr, gru->gs_gru_base_paddr); gru_kservices_init(gru); } static int gru_init_tables(unsigned long gru_base_paddr, void *gru_base_vaddr) { int pnode, nid, bid, chip; int cbrs, dsrbytes, n; int order = get_order(sizeof(struct gru_blade_state)); struct page *page; struct gru_state *gru; unsigned long paddr; void *vaddr; max_user_cbrs = GRU_NUM_CB; max_user_dsr_bytes = GRU_NUM_DSR_BYTES; for_each_online_node(nid) { bid = uv_node_to_blade_id(nid); pnode = uv_node_to_pnode(nid); if (bid < 0 || gru_base[bid]) continue; page = alloc_pages_node(nid, GFP_KERNEL, order); if (!page) goto fail; gru_base[bid] = page_address(page); memset(gru_base[bid], 0, sizeof(struct gru_blade_state)); gru_base[bid]->bs_lru_gru = &gru_base[bid]->bs_grus[0]; spin_lock_init(&gru_base[bid]->bs_lock); dsrbytes = 0; cbrs = 0; for (gru = gru_base[bid]->bs_grus, chip = 0; chip < GRU_CHIPLETS_PER_BLADE; chip++, gru++) { paddr = gru_chiplet_paddr(gru_base_paddr, pnode, chip); vaddr = gru_chiplet_vaddr(gru_base_vaddr, pnode, chip); gru_init_chiplet(gru, paddr, vaddr, nid, bid, chip); n = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE; cbrs = max(cbrs, n); n = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES; dsrbytes = max(dsrbytes, n); } max_user_cbrs = min(max_user_cbrs, cbrs); max_user_dsr_bytes = min(max_user_dsr_bytes, dsrbytes); } return 0; fail: for (nid--; nid >= 0; nid--) free_pages((unsigned long)gru_base[nid], order); return -ENOMEM; } #ifdef CONFIG_IA64 static int get_base_irq(void) { return IRQ_GRU; } #elif defined CONFIG_X86_64 static void noop(unsigned int irq) { } static struct irq_chip gru_chip = { .name = "gru", .mask = noop, .unmask = noop, .ack = noop, }; static int get_base_irq(void) { set_irq_chip(IRQ_GRU, &gru_chip); set_irq_chip(IRQ_GRU + 1, &gru_chip); return IRQ_GRU; } #endif /* * gru_init * * Called at boot or module load time to initialize the GRUs. */ static int __init gru_init(void) { int ret, irq, chip; char id[10]; void *gru_start_vaddr; if (!is_uv_system()) return -ENODEV; #if defined CONFIG_IA64 gru_start_paddr = 0xd000000000UL; /* ZZZZZZZZZZZZZZZZZZZ fixme */ #else gru_start_paddr = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR) & 0x7fffffffffffUL; #endif gru_start_vaddr = __va(gru_start_paddr); gru_end_paddr = gru_start_paddr + GRU_MAX_BLADES * GRU_SIZE; printk(KERN_INFO "GRU space: 0x%lx - 0x%lx\n", gru_start_paddr, gru_end_paddr); irq = get_base_irq(); for (chip = 0; chip < GRU_CHIPLETS_PER_BLADE; chip++) { ret = request_irq(irq + chip, gru_intr, 0, id, NULL); /* TODO: fix irq handling on x86. For now ignore failure because * interrupts are not required & not yet fully supported */ if (ret) { printk(KERN_WARNING "!!!WARNING: GRU ignoring request failure!!!\n"); ret = 0; } if (ret) { printk(KERN_ERR "%s: request_irq failed\n", GRU_DRIVER_ID_STR); goto exit1; } } ret = misc_register(&gru_miscdev); if (ret) { printk(KERN_ERR "%s: misc_register failed\n", GRU_DRIVER_ID_STR); goto exit1; } ret = gru_proc_init(); if (ret) { printk(KERN_ERR "%s: proc init failed\n", GRU_DRIVER_ID_STR); goto exit2; } ret = gru_init_tables(gru_start_paddr, gru_start_vaddr); if (ret) { printk(KERN_ERR "%s: init tables failed\n", GRU_DRIVER_ID_STR); goto exit3; } printk(KERN_INFO "%s: v%s\n", GRU_DRIVER_ID_STR, GRU_DRIVER_VERSION_STR); return 0; exit3: gru_proc_exit(); exit2: misc_deregister(&gru_miscdev); exit1: for (--chip; chip >= 0; chip--) free_irq(irq + chip, NULL); return ret; } static void __exit gru_exit(void) { int i, bid, gid; int order = get_order(sizeof(struct gru_state) * GRU_CHIPLETS_PER_BLADE); if (!is_uv_system()) return; for (i = 0; i < GRU_CHIPLETS_PER_BLADE; i++) free_irq(IRQ_GRU + i, NULL); foreach_gid(gid) gru_kservices_exit(GID_TO_GRU(gid)); for (bid = 0; bid < GRU_MAX_BLADES; bid++) free_pages((unsigned long)gru_base[bid], order); misc_deregister(&gru_miscdev); gru_proc_exit(); } static struct file_operations gru_fops = { .owner = THIS_MODULE, .unlocked_ioctl = gru_file_unlocked_ioctl, .mmap = gru_file_mmap, }; static struct miscdevice gru_miscdev = { .minor = MISC_DYNAMIC_MINOR, .name = "gru", .fops = &gru_fops, }; struct vm_operations_struct gru_vm_ops = { .close = gru_vma_close, .fault = gru_fault, }; #ifndef MODULE fs_initcall(gru_init); #else module_init(gru_init); #endif module_exit(gru_exit); module_param(gru_options, ulong, 0644); MODULE_PARM_DESC(gru_options, "Various debug options"); MODULE_AUTHOR("Silicon Graphics, Inc."); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION(GRU_DRIVER_ID_STR GRU_DRIVER_VERSION_STR); MODULE_VERSION(GRU_DRIVER_VERSION_STR);


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