/* $OpenBSD: drm_linux.c,v 1.84 2021/08/11 16:14:00 sthen Exp $ */ /* * Copyright (c) 2013 Jonathan Gray * Copyright (c) 2015, 2016 Mark Kettenis * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(__amd64__) || defined(__i386__) #include "bios.h" #endif void tasklet_run(void *arg) { struct tasklet_struct *ts = arg; clear_bit(TASKLET_STATE_SCHED, &ts->state); if (tasklet_trylock(ts)) { if (!atomic_read(&ts->count)) ts->func(ts->data); tasklet_unlock(ts); } } /* 32 bit powerpc lacks 64 bit atomics */ #if defined(__powerpc__) && !defined(__powerpc64__) struct mutex atomic64_mtx = MUTEX_INITIALIZER(IPL_HIGH); #endif struct mutex sch_mtx = MUTEX_INITIALIZER(IPL_SCHED); volatile struct proc *sch_proc; volatile void *sch_ident; int sch_priority; void set_current_state(int state) { if (sch_ident != curproc) mtx_enter(&sch_mtx); MUTEX_ASSERT_LOCKED(&sch_mtx); sch_ident = sch_proc = curproc; sch_priority = state; } void __set_current_state(int state) { KASSERT(state == TASK_RUNNING); if (sch_ident == curproc) { MUTEX_ASSERT_LOCKED(&sch_mtx); sch_ident = NULL; mtx_leave(&sch_mtx); } } void schedule(void) { schedule_timeout(MAX_SCHEDULE_TIMEOUT); } long schedule_timeout(long timeout) { struct sleep_state sls; unsigned long deadline; int wait, spl, timo = 0; MUTEX_ASSERT_LOCKED(&sch_mtx); KASSERT(!cold); if (timeout != MAX_SCHEDULE_TIMEOUT) timo = timeout; sleep_setup(&sls, sch_ident, sch_priority, "schto", timo); wait = (sch_proc == curproc && timeout > 0); spl = MUTEX_OLDIPL(&sch_mtx); MUTEX_OLDIPL(&sch_mtx) = splsched(); mtx_leave(&sch_mtx); if (timeout != MAX_SCHEDULE_TIMEOUT) deadline = jiffies + timeout; sleep_finish(&sls, wait); if (timeout != MAX_SCHEDULE_TIMEOUT) timeout = deadline - jiffies; mtx_enter(&sch_mtx); MUTEX_OLDIPL(&sch_mtx) = spl; sch_ident = curproc; return timeout > 0 ? timeout : 0; } long schedule_timeout_uninterruptible(long timeout) { tsleep(curproc, PWAIT, "schtou", timeout); return 0; } int wake_up_process(struct proc *p) { atomic_cas_ptr(&sch_proc, p, NULL); return wakeup_proc(p, NULL); } void flush_workqueue(struct workqueue_struct *wq) { if (cold) return; if (wq) taskq_barrier((struct taskq *)wq); } bool flush_work(struct work_struct *work) { if (cold) return false; if (work->tq) taskq_barrier(work->tq); return false; } bool flush_delayed_work(struct delayed_work *dwork) { bool ret = false; if (cold) return false; while (timeout_pending(&dwork->to)) { tsleep(dwork, PWAIT, "fldwto", 1); ret = true; } if (dwork->tq) taskq_barrier(dwork->tq); return ret; } struct kthread { int (*func)(void *); void *data; struct proc *proc; volatile u_int flags; #define KTHREAD_SHOULDSTOP 0x0000001 #define KTHREAD_STOPPED 0x0000002 #define KTHREAD_SHOULDPARK 0x0000004 #define KTHREAD_PARKED 0x0000008 LIST_ENTRY(kthread) next; }; LIST_HEAD(, kthread) kthread_list = LIST_HEAD_INITIALIZER(kthread_list); void kthread_func(void *arg) { struct kthread *thread = arg; int ret; ret = thread->func(thread->data); thread->flags |= KTHREAD_STOPPED; wakeup(thread); kthread_exit(ret); } struct proc * kthread_run(int (*func)(void *), void *data, const char *name) { struct kthread *thread; thread = malloc(sizeof(*thread), M_DRM, M_WAITOK); thread->func = func; thread->data = data; thread->flags = 0; if (kthread_create(kthread_func, thread, &thread->proc, name)) { free(thread, M_DRM, sizeof(*thread)); return ERR_PTR(-ENOMEM); } LIST_INSERT_HEAD(&kthread_list, thread, next); return thread->proc; } struct kthread_worker * kthread_create_worker(unsigned int flags, const char *fmt, ...) { char name[MAXCOMLEN+1]; va_list ap; struct kthread_worker *w = malloc(sizeof(*w), M_DRM, M_WAITOK); va_start(ap, fmt); vsnprintf(name, sizeof(name), fmt, ap); va_end(ap); w->tq = taskq_create(name, 1, IPL_HIGH, 0); return w; } void kthread_destroy_worker(struct kthread_worker *worker) { taskq_destroy(worker->tq); free(worker, M_DRM, sizeof(*worker)); } void kthread_init_work(struct kthread_work *work, void (*func)(struct kthread_work *)) { work->tq = NULL; task_set(&work->task, (void (*)(void *))func, work); } bool kthread_queue_work(struct kthread_worker *worker, struct kthread_work *work) { work->tq = worker->tq; return task_add(work->tq, &work->task); } bool kthread_cancel_work_sync(struct kthread_work *work) { return task_del(work->tq, &work->task); } void kthread_flush_work(struct kthread_work *work) { if (cold) return; if (work->tq) taskq_barrier(work->tq); } void kthread_flush_worker(struct kthread_worker *worker) { if (cold) return; if (worker->tq) taskq_barrier(worker->tq); } struct kthread * kthread_lookup(struct proc *p) { struct kthread *thread; LIST_FOREACH(thread, &kthread_list, next) { if (thread->proc == p) break; } KASSERT(thread); return thread; } int kthread_should_park(void) { struct kthread *thread = kthread_lookup(curproc); return (thread->flags & KTHREAD_SHOULDPARK); } void kthread_parkme(void) { struct kthread *thread = kthread_lookup(curproc); while (thread->flags & KTHREAD_SHOULDPARK) { thread->flags |= KTHREAD_PARKED; wakeup(thread); tsleep_nsec(thread, PPAUSE, "parkme", INFSLP); thread->flags &= ~KTHREAD_PARKED; } } void kthread_park(struct proc *p) { struct kthread *thread = kthread_lookup(p); while ((thread->flags & KTHREAD_PARKED) == 0) { thread->flags |= KTHREAD_SHOULDPARK; wake_up_process(thread->proc); tsleep_nsec(thread, PPAUSE, "park", INFSLP); } } void kthread_unpark(struct proc *p) { struct kthread *thread = kthread_lookup(p); thread->flags &= ~KTHREAD_SHOULDPARK; wakeup(thread); } int kthread_should_stop(void) { struct kthread *thread = kthread_lookup(curproc); return (thread->flags & KTHREAD_SHOULDSTOP); } void kthread_stop(struct proc *p) { struct kthread *thread = kthread_lookup(p); while ((thread->flags & KTHREAD_STOPPED) == 0) { thread->flags |= KTHREAD_SHOULDSTOP; kthread_unpark(p); wake_up_process(thread->proc); tsleep_nsec(thread, PPAUSE, "stop", INFSLP); } LIST_REMOVE(thread, next); free(thread, M_DRM, sizeof(*thread)); } #if NBIOS > 0 extern char smbios_board_vendor[]; extern char smbios_board_prod[]; extern char smbios_board_serial[]; #endif bool dmi_match(int slot, const char *str) { switch (slot) { case DMI_SYS_VENDOR: if (hw_vendor != NULL && !strcmp(hw_vendor, str)) return true; break; case DMI_PRODUCT_NAME: if (hw_prod != NULL && !strcmp(hw_prod, str)) return true; break; case DMI_PRODUCT_VERSION: if (hw_ver != NULL && !strcmp(hw_ver, str)) return true; break; #if NBIOS > 0 case DMI_BOARD_VENDOR: if (strcmp(smbios_board_vendor, str) == 0) return true; break; case DMI_BOARD_NAME: if (strcmp(smbios_board_prod, str) == 0) return true; break; case DMI_BOARD_SERIAL: if (strcmp(smbios_board_serial, str) == 0) return true; break; #else case DMI_BOARD_VENDOR: if (hw_vendor != NULL && !strcmp(hw_vendor, str)) return true; break; case DMI_BOARD_NAME: if (hw_prod != NULL && !strcmp(hw_prod, str)) return true; break; #endif case DMI_NONE: default: return false; } return false; } static bool dmi_found(const struct dmi_system_id *dsi) { int i, slot; for (i = 0; i < nitems(dsi->matches); i++) { slot = dsi->matches[i].slot; if (slot == DMI_NONE) break; if (!dmi_match(slot, dsi->matches[i].substr)) return false; } return true; } const struct dmi_system_id * dmi_first_match(const struct dmi_system_id *sysid) { const struct dmi_system_id *dsi; for (dsi = sysid; dsi->matches[0].slot != 0 ; dsi++) { if (dmi_found(dsi)) return dsi; } return NULL; } #if NBIOS > 0 extern char smbios_bios_date[]; #endif const char * dmi_get_system_info(int slot) { WARN_ON(slot != DMI_BIOS_DATE); #if NBIOS > 0 if (slot == DMI_BIOS_DATE) return smbios_bios_date; #endif return NULL; } int dmi_check_system(const struct dmi_system_id *sysid) { const struct dmi_system_id *dsi; int num = 0; for (dsi = sysid; dsi->matches[0].slot != 0 ; dsi++) { if (dmi_found(dsi)) { num++; if (dsi->callback && dsi->callback(dsi)) break; } } return (num); } struct vm_page * alloc_pages(unsigned int gfp_mask, unsigned int order) { int flags = (gfp_mask & M_NOWAIT) ? UVM_PLA_NOWAIT : UVM_PLA_WAITOK; struct uvm_constraint_range *constraint = &no_constraint; struct pglist mlist; if (gfp_mask & M_CANFAIL) flags |= UVM_PLA_FAILOK; if (gfp_mask & M_ZERO) flags |= UVM_PLA_ZERO; if (gfp_mask & __GFP_DMA32) constraint = &dma_constraint; TAILQ_INIT(&mlist); if (uvm_pglistalloc(PAGE_SIZE << order, constraint->ucr_low, constraint->ucr_high, PAGE_SIZE, 0, &mlist, 1, flags)) return NULL; return TAILQ_FIRST(&mlist); } void __free_pages(struct vm_page *page, unsigned int order) { struct pglist mlist; int i; TAILQ_INIT(&mlist); for (i = 0; i < (1 << order); i++) TAILQ_INSERT_TAIL(&mlist, &page[i], pageq); uvm_pglistfree(&mlist); } void __pagevec_release(struct pagevec *pvec) { struct pglist mlist; int i; TAILQ_INIT(&mlist); for (i = 0; i < pvec->nr; i++) TAILQ_INSERT_TAIL(&mlist, pvec->pages[i], pageq); uvm_pglistfree(&mlist); pagevec_reinit(pvec); } void * kmap(struct vm_page *pg) { vaddr_t va; #if defined (__HAVE_PMAP_DIRECT) va = pmap_map_direct(pg); #else va = uvm_km_valloc_wait(phys_map, PAGE_SIZE); pmap_kenter_pa(va, VM_PAGE_TO_PHYS(pg), PROT_READ | PROT_WRITE); pmap_update(pmap_kernel()); #endif return (void *)va; } void kunmap_va(void *addr) { vaddr_t va = (vaddr_t)addr; #if defined (__HAVE_PMAP_DIRECT) pmap_unmap_direct(va); #else pmap_kremove(va, PAGE_SIZE); pmap_update(pmap_kernel()); uvm_km_free_wakeup(phys_map, va, PAGE_SIZE); #endif } vaddr_t kmap_atomic_va; int kmap_atomic_inuse; void * kmap_atomic_prot(struct vm_page *pg, pgprot_t prot) { KASSERT(!kmap_atomic_inuse); kmap_atomic_inuse = 1; pmap_kenter_pa(kmap_atomic_va, VM_PAGE_TO_PHYS(pg) | prot, PROT_READ | PROT_WRITE); return (void *)kmap_atomic_va; } void kunmap_atomic(void *addr) { KASSERT(kmap_atomic_inuse); pmap_kremove(kmap_atomic_va, PAGE_SIZE); kmap_atomic_inuse = 0; } void * vmap(struct vm_page **pages, unsigned int npages, unsigned long flags, pgprot_t prot) { vaddr_t va; paddr_t pa; int i; va = uvm_km_valloc(kernel_map, PAGE_SIZE * npages); if (va == 0) return NULL; for (i = 0; i < npages; i++) { pa = VM_PAGE_TO_PHYS(pages[i]) | prot; pmap_enter(pmap_kernel(), va + (i * PAGE_SIZE), pa, PROT_READ | PROT_WRITE, PROT_READ | PROT_WRITE | PMAP_WIRED); pmap_update(pmap_kernel()); } return (void *)va; } void vunmap(void *addr, size_t size) { vaddr_t va = (vaddr_t)addr; pmap_remove(pmap_kernel(), va, va + size); pmap_update(pmap_kernel()); uvm_km_free(kernel_map, va, size); } bool is_vmalloc_addr(const void *p) { vaddr_t min, max, addr; min = vm_map_min(kernel_map); max = vm_map_max(kernel_map); addr = (vaddr_t)p; if (addr >= min && addr <= max) return true; else return false; } void print_hex_dump(const char *level, const char *prefix_str, int prefix_type, int rowsize, int groupsize, const void *buf, size_t len, bool ascii) { const uint8_t *cbuf = buf; int i; for (i = 0; i < len; i++) { if ((i % rowsize) == 0) printf("%s", prefix_str); printf("%02x", cbuf[i]); if ((i % rowsize) == (rowsize - 1)) printf("\n"); else printf(" "); } } void * memchr_inv(const void *s, int c, size_t n) { if (n != 0) { const unsigned char *p = s; do { if (*p++ != (unsigned char)c) return ((void *)(p - 1)); } while (--n != 0); } return (NULL); } int panic_cmp(struct rb_node *a, struct rb_node *b) { panic(__func__); } #undef RB_ROOT #define RB_ROOT(head) (head)->rbh_root RB_GENERATE(linux_root, rb_node, __entry, panic_cmp); /* * This is a fairly minimal implementation of the Linux "idr" API. It * probably isn't very efficient, and defenitely isn't RCU safe. The * pre-load buffer is global instead of per-cpu; we rely on the kernel * lock to make this work. We do randomize our IDs in order to make * them harder to guess. */ int idr_cmp(struct idr_entry *, struct idr_entry *); SPLAY_PROTOTYPE(idr_tree, idr_entry, entry, idr_cmp); struct pool idr_pool; struct idr_entry *idr_entry_cache; void idr_init(struct idr *idr) { SPLAY_INIT(&idr->tree); } void idr_destroy(struct idr *idr) { struct idr_entry *id; while ((id = SPLAY_MIN(idr_tree, &idr->tree))) { SPLAY_REMOVE(idr_tree, &idr->tree, id); pool_put(&idr_pool, id); } } void idr_preload(unsigned int gfp_mask) { int flags = (gfp_mask & GFP_NOWAIT) ? PR_NOWAIT : PR_WAITOK; KERNEL_ASSERT_LOCKED(); if (idr_entry_cache == NULL) idr_entry_cache = pool_get(&idr_pool, flags); } int idr_alloc(struct idr *idr, void *ptr, int start, int end, gfp_t gfp_mask) { int flags = (gfp_mask & GFP_NOWAIT) ? PR_NOWAIT : PR_WAITOK; struct idr_entry *id; int begin; KERNEL_ASSERT_LOCKED(); if (idr_entry_cache) { id = idr_entry_cache; idr_entry_cache = NULL; } else { id = pool_get(&idr_pool, flags); if (id == NULL) return -ENOMEM; } if (end <= 0) end = INT_MAX; #ifdef notyet id->id = begin = start + arc4random_uniform(end - start); #else id->id = begin = start; #endif while (SPLAY_INSERT(idr_tree, &idr->tree, id)) { if (id->id == end) id->id = start; else id->id++; if (id->id == begin) { pool_put(&idr_pool, id); return -ENOSPC; } } id->ptr = ptr; return id->id; } void * idr_replace(struct idr *idr, void *ptr, unsigned long id) { struct idr_entry find, *res; void *old; find.id = id; res = SPLAY_FIND(idr_tree, &idr->tree, &find); if (res == NULL) return ERR_PTR(-ENOENT); old = res->ptr; res->ptr = ptr; return old; } void * idr_remove(struct idr *idr, unsigned long id) { struct idr_entry find, *res; void *ptr = NULL; find.id = id; res = SPLAY_FIND(idr_tree, &idr->tree, &find); if (res) { SPLAY_REMOVE(idr_tree, &idr->tree, res); ptr = res->ptr; pool_put(&idr_pool, res); } return ptr; } void * idr_find(struct idr *idr, unsigned long id) { struct idr_entry find, *res; find.id = id; res = SPLAY_FIND(idr_tree, &idr->tree, &find); if (res == NULL) return NULL; return res->ptr; } void * idr_get_next(struct idr *idr, int *id) { struct idr_entry *res; SPLAY_FOREACH(res, idr_tree, &idr->tree) { if (res->id >= *id) { *id = res->id; return res->ptr; } } return NULL; } int idr_for_each(struct idr *idr, int (*func)(int, void *, void *), void *data) { struct idr_entry *id; int ret; SPLAY_FOREACH(id, idr_tree, &idr->tree) { ret = func(id->id, id->ptr, data); if (ret) return ret; } return 0; } int idr_cmp(struct idr_entry *a, struct idr_entry *b) { return (a->id < b->id ? -1 : a->id > b->id); } SPLAY_GENERATE(idr_tree, idr_entry, entry, idr_cmp); void ida_init(struct ida *ida) { idr_init(&ida->idr); } void ida_destroy(struct ida *ida) { idr_destroy(&ida->idr); } int ida_simple_get(struct ida *ida, unsigned int start, unsigned int end, gfp_t gfp_mask) { return idr_alloc(&ida->idr, NULL, start, end, gfp_mask); } void ida_simple_remove(struct ida *ida, unsigned int id) { idr_remove(&ida->idr, id); } int xarray_cmp(struct xarray_entry *a, struct xarray_entry *b) { return (a->id < b->id ? -1 : a->id > b->id); } SPLAY_PROTOTYPE(xarray_tree, xarray_entry, entry, xarray_cmp); struct pool xa_pool; SPLAY_GENERATE(xarray_tree, xarray_entry, entry, xarray_cmp); void xa_init_flags(struct xarray *xa, gfp_t flags) { static int initialized; if (!initialized) { pool_init(&xa_pool, sizeof(struct xarray_entry), 0, IPL_TTY, 0, "xapl", NULL); initialized = 1; } SPLAY_INIT(&xa->xa_tree); } void xa_destroy(struct xarray *xa) { struct xarray_entry *id; while ((id = SPLAY_MIN(xarray_tree, &xa->xa_tree))) { SPLAY_REMOVE(xarray_tree, &xa->xa_tree, id); pool_put(&xa_pool, id); } } int xa_alloc(struct xarray *xa, u32 *id, void *entry, int limit, gfp_t gfp) { struct xarray_entry *xid; int flags = (gfp & GFP_NOWAIT) ? PR_NOWAIT : PR_WAITOK; int start = (xa->xa_flags & XA_FLAGS_ALLOC1) ? 1 : 0; int begin; xid = pool_get(&xa_pool, flags); if (xid == NULL) return -ENOMEM; if (limit <= 0) limit = INT_MAX; xid->id = begin = start; while (SPLAY_INSERT(xarray_tree, &xa->xa_tree, xid)) { if (xid->id == limit) xid->id = start; else xid->id++; if (xid->id == begin) { pool_put(&xa_pool, xid); return -EBUSY; } } xid->ptr = entry; *id = xid->id; return 0; } void * xa_erase(struct xarray *xa, unsigned long index) { struct xarray_entry find, *res; void *ptr = NULL; find.id = index; res = SPLAY_FIND(xarray_tree, &xa->xa_tree, &find); if (res) { SPLAY_REMOVE(xarray_tree, &xa->xa_tree, res); ptr = res->ptr; pool_put(&xa_pool, res); } return ptr; } void * xa_load(struct xarray *xa, unsigned long index) { struct xarray_entry find, *res; find.id = index; res = SPLAY_FIND(xarray_tree, &xa->xa_tree, &find); if (res == NULL) return NULL; return res->ptr; } void * xa_get_next(struct xarray *xa, unsigned long *index) { struct xarray_entry *res; SPLAY_FOREACH(res, xarray_tree, &xa->xa_tree) { if (res->id >= *index) { *index = res->id; return res->ptr; } } return NULL; } int sg_alloc_table(struct sg_table *table, unsigned int nents, gfp_t gfp_mask) { table->sgl = mallocarray(nents, sizeof(struct scatterlist), M_DRM, gfp_mask | M_ZERO); if (table->sgl == NULL) return -ENOMEM; table->nents = table->orig_nents = nents; sg_mark_end(&table->sgl[nents - 1]); return 0; } void sg_free_table(struct sg_table *table) { free(table->sgl, M_DRM, table->orig_nents * sizeof(struct scatterlist)); table->orig_nents = 0; table->sgl = NULL; } size_t sg_copy_from_buffer(struct scatterlist *sgl, unsigned int nents, const void *buf, size_t buflen) { panic("%s", __func__); } int i2c_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) { void *cmd = NULL; int cmdlen = 0; int err, ret = 0; int op; iic_acquire_bus(&adap->ic, 0); while (num > 2) { op = (msgs->flags & I2C_M_RD) ? I2C_OP_READ : I2C_OP_WRITE; err = iic_exec(&adap->ic, op, msgs->addr, NULL, 0, msgs->buf, msgs->len, 0); if (err) { ret = -err; goto fail; } msgs++; num--; ret++; } if (num > 1) { cmd = msgs->buf; cmdlen = msgs->len; msgs++; num--; ret++; } op = (msgs->flags & I2C_M_RD) ? I2C_OP_READ_WITH_STOP : I2C_OP_WRITE_WITH_STOP; err = iic_exec(&adap->ic, op, msgs->addr, cmd, cmdlen, msgs->buf, msgs->len, 0); if (err) { ret = -err; goto fail; } msgs++; ret++; fail: iic_release_bus(&adap->ic, 0); return ret; } int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) { int ret, retries; if (adap->lock_ops) adap->lock_ops->lock_bus(adap, 0); retries = adap->retries; retry: if (adap->algo) ret = adap->algo->master_xfer(adap, msgs, num); else ret = i2c_master_xfer(adap, msgs, num); if (ret == -EAGAIN && retries > 0) { retries--; goto retry; } if (adap->lock_ops) adap->lock_ops->unlock_bus(adap, 0); return ret; } int i2c_bb_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) { struct i2c_algo_bit_data *algo = adap->algo_data; struct i2c_adapter bb; memset(&bb, 0, sizeof(bb)); bb.ic = algo->ic; bb.retries = adap->retries; return i2c_master_xfer(&bb, msgs, num); } uint32_t i2c_bb_functionality(struct i2c_adapter *adap) { return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; } struct i2c_algorithm i2c_bit_algo = { .master_xfer = i2c_bb_master_xfer, .functionality = i2c_bb_functionality }; int i2c_bit_add_bus(struct i2c_adapter *adap) { adap->algo = &i2c_bit_algo; adap->retries = 3; return 0; } #if defined(__amd64__) || defined(__i386__) /* * This is a minimal implementation of the Linux vga_get/vga_put * interface. In all likelyhood, it will only work for inteldrm(4) as * it assumes that if there is another active VGA device in the * system, it is sitting behind a PCI bridge. */ extern int pci_enumerate_bus(struct pci_softc *, int (*)(struct pci_attach_args *), struct pci_attach_args *); pcitag_t vga_bridge_tag; int vga_bridge_disabled; int vga_disable_bridge(struct pci_attach_args *pa) { pcireg_t bhlc, bc; if (pa->pa_domain != 0) return 0; bhlc = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_BHLC_REG); if (PCI_HDRTYPE_TYPE(bhlc) != 1) return 0; bc = pci_conf_read(pa->pa_pc, pa->pa_tag, PPB_REG_BRIDGECONTROL); if ((bc & PPB_BC_VGA_ENABLE) == 0) return 0; bc &= ~PPB_BC_VGA_ENABLE; pci_conf_write(pa->pa_pc, pa->pa_tag, PPB_REG_BRIDGECONTROL, bc); vga_bridge_tag = pa->pa_tag; vga_bridge_disabled = 1; return 1; } void vga_get_uninterruptible(struct pci_dev *pdev, int rsrc) { KASSERT(pdev->pci->sc_bridgetag == NULL); pci_enumerate_bus(pdev->pci, vga_disable_bridge, NULL); } void vga_put(struct pci_dev *pdev, int rsrc) { pcireg_t bc; if (!vga_bridge_disabled) return; bc = pci_conf_read(pdev->pc, vga_bridge_tag, PPB_REG_BRIDGECONTROL); bc |= PPB_BC_VGA_ENABLE; pci_conf_write(pdev->pc, vga_bridge_tag, PPB_REG_BRIDGECONTROL, bc); vga_bridge_disabled = 0; } #endif /* * ACPI types and interfaces. */ #ifdef __HAVE_ACPI #include "acpi.h" #endif #if NACPI > 0 #include #include #include #include acpi_status acpi_get_table(const char *sig, int instance, struct acpi_table_header **hdr) { struct acpi_softc *sc = acpi_softc; struct acpi_q *entry; KASSERT(instance == 1); if (sc == NULL) return AE_NOT_FOUND; SIMPLEQ_FOREACH(entry, &sc->sc_tables, q_next) { if (memcmp(entry->q_table, sig, strlen(sig)) == 0) { *hdr = entry->q_table; return 0; } } return AE_NOT_FOUND; } acpi_status acpi_get_handle(acpi_handle node, const char *name, acpi_handle *rnode) { node = aml_searchname(node, name); if (node == NULL) return AE_NOT_FOUND; *rnode = node; return 0; } acpi_status acpi_get_name(acpi_handle node, int type, struct acpi_buffer *buffer) { KASSERT(buffer->length != ACPI_ALLOCATE_BUFFER); KASSERT(type == ACPI_FULL_PATHNAME); strlcpy(buffer->pointer, aml_nodename(node), buffer->length); return 0; } acpi_status acpi_evaluate_object(acpi_handle node, const char *name, struct acpi_object_list *params, struct acpi_buffer *result) { struct aml_value args[4], res; union acpi_object *obj; uint8_t *data; int i; KASSERT(params->count <= nitems(args)); for (i = 0; i < params->count; i++) { args[i].type = params->pointer[i].type; switch (args[i].type) { case AML_OBJTYPE_INTEGER: args[i].v_integer = params->pointer[i].integer.value; break; case AML_OBJTYPE_BUFFER: args[i].length = params->pointer[i].buffer.length; args[i].v_buffer = params->pointer[i].buffer.pointer; break; default: printf("%s: arg type 0x%02x", __func__, args[i].type); return AE_BAD_PARAMETER; } } if (name) { node = aml_searchname(node, name); if (node == NULL) return AE_NOT_FOUND; } if (aml_evalnode(acpi_softc, node, params->count, args, &res)) { aml_freevalue(&res); return AE_ERROR; } KASSERT(result->length == ACPI_ALLOCATE_BUFFER); result->length = sizeof(union acpi_object); switch (res.type) { case AML_OBJTYPE_BUFFER: result->length += res.length; result->pointer = malloc(result->length, M_DRM, M_WAITOK); obj = (union acpi_object *)result->pointer; data = (uint8_t *)(obj + 1); obj->type = res.type; obj->buffer.length = res.length; obj->buffer.pointer = data; memcpy(data, res.v_buffer, res.length); break; default: printf("%s: return type 0x%02x", __func__, res.type); aml_freevalue(&res); return AE_ERROR; } aml_freevalue(&res); return 0; } SLIST_HEAD(, notifier_block) drm_linux_acpi_notify_list = SLIST_HEAD_INITIALIZER(drm_linux_acpi_notify_list); int drm_linux_acpi_notify(struct aml_node *node, int notify, void *arg) { struct acpi_bus_event event; struct notifier_block *nb; event.device_class = ACPI_VIDEO_CLASS; event.type = notify; SLIST_FOREACH(nb, &drm_linux_acpi_notify_list, link) nb->notifier_call(nb, 0, &event); return 0; } int register_acpi_notifier(struct notifier_block *nb) { SLIST_INSERT_HEAD(&drm_linux_acpi_notify_list, nb, link); return 0; } int unregister_acpi_notifier(struct notifier_block *nb) { struct notifier_block *tmp; SLIST_FOREACH(tmp, &drm_linux_acpi_notify_list, link) { if (tmp == nb) { SLIST_REMOVE(&drm_linux_acpi_notify_list, nb, notifier_block, link); return 0; } } return -ENOENT; } const char * acpi_format_exception(acpi_status status) { switch (status) { case AE_NOT_FOUND: return "not found"; case AE_BAD_PARAMETER: return "bad parameter"; default: return "unknown"; } } #endif void backlight_do_update_status(void *arg) { backlight_update_status(arg); } struct backlight_device * backlight_device_register(const char *name, void *kdev, void *data, const struct backlight_ops *ops, struct backlight_properties *props) { struct backlight_device *bd; bd = malloc(sizeof(*bd), M_DRM, M_WAITOK); bd->ops = ops; bd->props = *props; bd->data = data; task_set(&bd->task, backlight_do_update_status, bd); return bd; } void backlight_device_unregister(struct backlight_device *bd) { free(bd, M_DRM, sizeof(*bd)); } void backlight_schedule_update_status(struct backlight_device *bd) { task_add(systq, &bd->task); } inline int backlight_enable(struct backlight_device *bd) { if (bd == NULL) return 0; bd->props.power = FB_BLANK_UNBLANK; return bd->ops->update_status(bd); } inline int backlight_disable(struct backlight_device *bd) { if (bd == NULL) return 0; bd->props.power = FB_BLANK_POWERDOWN; return bd->ops->update_status(bd); } void drm_sysfs_hotplug_event(struct drm_device *dev) { KNOTE(&dev->note, NOTE_CHANGE); } struct dma_fence * dma_fence_get(struct dma_fence *fence) { if (fence) kref_get(&fence->refcount); return fence; } struct dma_fence * dma_fence_get_rcu(struct dma_fence *fence) { if (fence) kref_get(&fence->refcount); return fence; } struct dma_fence * dma_fence_get_rcu_safe(struct dma_fence **dfp) { struct dma_fence *fence; if (dfp == NULL) return NULL; fence = *dfp; if (fence) kref_get(&fence->refcount); return fence; } void dma_fence_release(struct kref *ref) { struct dma_fence *fence = container_of(ref, struct dma_fence, refcount); if (fence->ops && fence->ops->release) fence->ops->release(fence); else free(fence, M_DRM, 0); } void dma_fence_put(struct dma_fence *fence) { if (fence) kref_put(&fence->refcount, dma_fence_release); } int dma_fence_signal_locked(struct dma_fence *fence) { struct dma_fence_cb *cur, *tmp; struct list_head cb_list; if (fence == NULL) return -EINVAL; if (test_and_set_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) return -EINVAL; list_replace(&fence->cb_list, &cb_list); fence->timestamp = ktime_get(); set_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags); list_for_each_entry_safe(cur, tmp, &cb_list, node) { INIT_LIST_HEAD(&cur->node); cur->func(fence, cur); } return 0; } int dma_fence_signal(struct dma_fence *fence) { int r; if (fence == NULL) return -EINVAL; mtx_enter(fence->lock); r = dma_fence_signal_locked(fence); mtx_leave(fence->lock); return r; } bool dma_fence_is_signaled(struct dma_fence *fence) { if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) return true; if (fence->ops->signaled && fence->ops->signaled(fence)) { dma_fence_signal(fence); return true; } return false; } bool dma_fence_is_signaled_locked(struct dma_fence *fence) { if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) return true; if (fence->ops->signaled && fence->ops->signaled(fence)) { dma_fence_signal_locked(fence); return true; } return false; } long dma_fence_wait_timeout(struct dma_fence *fence, bool intr, long timeout) { if (timeout < 0) return -EINVAL; if (fence->ops->wait) return fence->ops->wait(fence, intr, timeout); else return dma_fence_default_wait(fence, intr, timeout); } long dma_fence_wait(struct dma_fence *fence, bool intr) { long ret; ret = dma_fence_wait_timeout(fence, intr, MAX_SCHEDULE_TIMEOUT); if (ret < 0) return ret; return 0; } void dma_fence_enable_sw_signaling(struct dma_fence *fence) { if (!test_and_set_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, &fence->flags) && !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags) && fence->ops->enable_signaling) { mtx_enter(fence->lock); if (!fence->ops->enable_signaling(fence)) dma_fence_signal_locked(fence); mtx_leave(fence->lock); } } void dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops, struct mutex *lock, uint64_t context, uint64_t seqno) { fence->ops = ops; fence->lock = lock; fence->context = context; fence->seqno = seqno; fence->flags = 0; fence->error = 0; kref_init(&fence->refcount); INIT_LIST_HEAD(&fence->cb_list); } int dma_fence_add_callback(struct dma_fence *fence, struct dma_fence_cb *cb, dma_fence_func_t func) { int ret = 0; bool was_set; if (WARN_ON(!fence || !func)) return -EINVAL; if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) { INIT_LIST_HEAD(&cb->node); return -ENOENT; } mtx_enter(fence->lock); was_set = test_and_set_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, &fence->flags); if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) ret = -ENOENT; else if (!was_set && fence->ops->enable_signaling) { if (!fence->ops->enable_signaling(fence)) { dma_fence_signal_locked(fence); ret = -ENOENT; } } if (!ret) { cb->func = func; list_add_tail(&cb->node, &fence->cb_list); } else INIT_LIST_HEAD(&cb->node); mtx_leave(fence->lock); return ret; } bool dma_fence_remove_callback(struct dma_fence *fence, struct dma_fence_cb *cb) { bool ret; mtx_enter(fence->lock); ret = !list_empty(&cb->node); if (ret) list_del_init(&cb->node); mtx_leave(fence->lock); return ret; } static atomic64_t drm_fence_context_count = ATOMIC64_INIT(1); uint64_t dma_fence_context_alloc(unsigned int num) { return atomic64_add_return(num, &drm_fence_context_count) - num; } struct default_wait_cb { struct dma_fence_cb base; struct proc *proc; }; static void dma_fence_default_wait_cb(struct dma_fence *fence, struct dma_fence_cb *cb) { struct default_wait_cb *wait = container_of(cb, struct default_wait_cb, base); wake_up_process(wait->proc); } long dma_fence_default_wait(struct dma_fence *fence, bool intr, signed long timeout) { long ret = timeout ? timeout : 1; unsigned long end; int err; struct default_wait_cb cb; bool was_set; KASSERT(timeout <= INT_MAX); if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) return ret; mtx_enter(fence->lock); was_set = test_and_set_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, &fence->flags); if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) goto out; if (!was_set && fence->ops->enable_signaling) { if (!fence->ops->enable_signaling(fence)) { dma_fence_signal_locked(fence); goto out; } } if (timeout == 0) { ret = 0; goto out; } cb.base.func = dma_fence_default_wait_cb; cb.proc = curproc; list_add(&cb.base.node, &fence->cb_list); end = jiffies + timeout; for (ret = timeout; ret > 0; ret = MAX(0, end - jiffies)) { if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) break; err = msleep(curproc, fence->lock, intr ? PCATCH : 0, "dmafence", ret); if (err == EINTR || err == ERESTART) { ret = -ERESTARTSYS; break; } } if (!list_empty(&cb.base.node)) list_del(&cb.base.node); out: mtx_leave(fence->lock); return ret; } static bool dma_fence_test_signaled_any(struct dma_fence **fences, uint32_t count, uint32_t *idx) { int i; for (i = 0; i < count; ++i) { struct dma_fence *fence = fences[i]; if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) { if (idx) *idx = i; return true; } } return false; } long dma_fence_wait_any_timeout(struct dma_fence **fences, uint32_t count, bool intr, long timeout, uint32_t *idx) { struct default_wait_cb *cb; long ret = timeout; unsigned long end; int i, err; KASSERT(timeout <= INT_MAX); if (timeout == 0) { for (i = 0; i < count; i++) { if (dma_fence_is_signaled(fences[i])) { if (idx) *idx = i; return 1; } } return 0; } cb = mallocarray(count, sizeof(*cb), M_DRM, M_WAITOK|M_CANFAIL|M_ZERO); if (cb == NULL) return -ENOMEM; for (i = 0; i < count; i++) { struct dma_fence *fence = fences[i]; cb[i].proc = curproc; if (dma_fence_add_callback(fence, &cb[i].base, dma_fence_default_wait_cb)) { if (idx) *idx = i; goto cb_cleanup; } } end = jiffies + timeout; for (ret = timeout; ret > 0; ret = MAX(0, end - jiffies)) { if (dma_fence_test_signaled_any(fences, count, idx)) break; err = tsleep(curproc, intr ? PCATCH : 0, "dfwat", ret); if (err == EINTR || err == ERESTART) { ret = -ERESTARTSYS; break; } } cb_cleanup: while (i-- > 0) dma_fence_remove_callback(fences[i], &cb[i].base); free(cb, M_DRM, count * sizeof(*cb)); return ret; } static struct dma_fence dma_fence_stub; static struct mutex dma_fence_stub_mtx = MUTEX_INITIALIZER(IPL_TTY); static const char * dma_fence_stub_get_name(struct dma_fence *fence) { return "stub"; } static const struct dma_fence_ops dma_fence_stub_ops = { .get_driver_name = dma_fence_stub_get_name, .get_timeline_name = dma_fence_stub_get_name, }; struct dma_fence * dma_fence_get_stub(void) { mtx_enter(&dma_fence_stub_mtx); if (dma_fence_stub.ops == NULL) { dma_fence_init(&dma_fence_stub, &dma_fence_stub_ops, &dma_fence_stub_mtx, 0, 0); dma_fence_signal_locked(&dma_fence_stub); } mtx_leave(&dma_fence_stub_mtx); return dma_fence_get(&dma_fence_stub); } static const char * dma_fence_array_get_driver_name(struct dma_fence *fence) { return "dma_fence_array"; } static const char * dma_fence_array_get_timeline_name(struct dma_fence *fence) { return "unbound"; } static void irq_dma_fence_array_work(struct irq_work *wrk) { struct dma_fence_array *dfa = container_of(wrk, typeof(*dfa), work); dma_fence_signal(&dfa->base); dma_fence_put(&dfa->base); } static void dma_fence_array_cb_func(struct dma_fence *f, struct dma_fence_cb *cb) { struct dma_fence_array_cb *array_cb = container_of(cb, struct dma_fence_array_cb, cb); struct dma_fence_array *dfa = array_cb->array; if (atomic_dec_and_test(&dfa->num_pending)) irq_work_queue(&dfa->work); else dma_fence_put(&dfa->base); } static bool dma_fence_array_enable_signaling(struct dma_fence *fence) { struct dma_fence_array *dfa = to_dma_fence_array(fence); struct dma_fence_array_cb *cb = (void *)(&dfa[1]); int i; for (i = 0; i < dfa->num_fences; ++i) { cb[i].array = dfa; dma_fence_get(&dfa->base); if (dma_fence_add_callback(dfa->fences[i], &cb[i].cb, dma_fence_array_cb_func)) { dma_fence_put(&dfa->base); if (atomic_dec_and_test(&dfa->num_pending)) return false; } } return true; } static bool dma_fence_array_signaled(struct dma_fence *fence) { struct dma_fence_array *dfa = to_dma_fence_array(fence); return atomic_read(&dfa->num_pending) <= 0; } static void dma_fence_array_release(struct dma_fence *fence) { struct dma_fence_array *dfa = to_dma_fence_array(fence); int i; for (i = 0; i < dfa->num_fences; ++i) dma_fence_put(dfa->fences[i]); free(dfa->fences, M_DRM, 0); dma_fence_free(fence); } struct dma_fence_array * dma_fence_array_create(int num_fences, struct dma_fence **fences, u64 context, unsigned seqno, bool signal_on_any) { struct dma_fence_array *dfa = malloc(sizeof(*dfa) + (num_fences * sizeof(struct dma_fence_array_cb)), M_DRM, M_WAITOK|M_CANFAIL|M_ZERO); if (dfa == NULL) return NULL; mtx_init(&dfa->lock, IPL_TTY); dma_fence_init(&dfa->base, &dma_fence_array_ops, &dfa->lock, context, seqno); init_irq_work(&dfa->work, irq_dma_fence_array_work); dfa->num_fences = num_fences; atomic_set(&dfa->num_pending, signal_on_any ? 1 : num_fences); dfa->fences = fences; return dfa; } const struct dma_fence_ops dma_fence_array_ops = { .get_driver_name = dma_fence_array_get_driver_name, .get_timeline_name = dma_fence_array_get_timeline_name, .enable_signaling = dma_fence_array_enable_signaling, .signaled = dma_fence_array_signaled, .release = dma_fence_array_release, }; int dma_fence_chain_find_seqno(struct dma_fence **df, uint64_t seqno) { if (seqno == 0) return 0; STUB(); return -ENOSYS; } void dma_fence_chain_init(struct dma_fence_chain *chain, struct dma_fence *prev, struct dma_fence *fence, uint64_t seqno) { struct dma_fence_chain *prev_chain = to_dma_fence_chain(prev); uint64_t context; chain->fence = fence; chain->prev = prev; mtx_init(&chain->lock, IPL_TTY); if (prev_chain && seqno > prev->seqno) { chain->prev_seqno = prev->seqno; context = prev->context; } else { chain->prev_seqno = 0; context = dma_fence_context_alloc(1); } dma_fence_init(&chain->base, &dma_fence_chain_ops, &chain->lock, context, seqno); } static const char * dma_fence_chain_get_driver_name(struct dma_fence *fence) { return "dma_fence_chain"; } static const char * dma_fence_chain_get_timeline_name(struct dma_fence *fence) { return "unbound"; } static bool dma_fence_chain_enable_signaling(struct dma_fence *fence) { STUB(); return false; } static bool dma_fence_chain_signaled(struct dma_fence *fence) { STUB(); return false; } static void dma_fence_chain_release(struct dma_fence *fence) { STUB(); } struct dma_fence * dma_fence_chain_next(struct dma_fence *fence) { struct dma_fence_chain *chain = to_dma_fence_chain(fence); if (chain == NULL) { dma_fence_put(fence); return NULL; } STUB(); dma_fence_put(fence); return NULL; } const struct dma_fence_ops dma_fence_chain_ops = { .get_driver_name = dma_fence_chain_get_driver_name, .get_timeline_name = dma_fence_chain_get_timeline_name, .enable_signaling = dma_fence_chain_enable_signaling, .signaled = dma_fence_chain_signaled, .release = dma_fence_chain_release, }; int dmabuf_read(struct file *fp, struct uio *uio, int fflags) { return (ENXIO); } int dmabuf_write(struct file *fp, struct uio *uio, int fflags) { return (ENXIO); } int dmabuf_ioctl(struct file *fp, u_long com, caddr_t data, struct proc *p) { return (ENOTTY); } int dmabuf_poll(struct file *fp, int events, struct proc *p) { return (0); } int dmabuf_kqfilter(struct file *fp, struct knote *kn) { return (EINVAL); } int dmabuf_stat(struct file *fp, struct stat *st, struct proc *p) { struct dma_buf *dmabuf = fp->f_data; memset(st, 0, sizeof(*st)); st->st_size = dmabuf->size; st->st_mode = S_IFIFO; /* XXX */ return (0); } int dmabuf_close(struct file *fp, struct proc *p) { struct dma_buf *dmabuf = fp->f_data; fp->f_data = NULL; KERNEL_LOCK(); dmabuf->ops->release(dmabuf); KERNEL_UNLOCK(); free(dmabuf, M_DRM, sizeof(struct dma_buf)); return (0); } int dmabuf_seek(struct file *fp, off_t *offset, int whence, struct proc *p) { struct dma_buf *dmabuf = fp->f_data; off_t newoff; if (*offset != 0) return (EINVAL); switch (whence) { case SEEK_SET: newoff = 0; break; case SEEK_END: newoff = dmabuf->size; break; default: return (EINVAL); } mtx_enter(&fp->f_mtx); fp->f_offset = newoff; mtx_leave(&fp->f_mtx); *offset = newoff; return (0); } const struct fileops dmabufops = { .fo_read = dmabuf_read, .fo_write = dmabuf_write, .fo_ioctl = dmabuf_ioctl, .fo_poll = dmabuf_poll, .fo_kqfilter = dmabuf_kqfilter, .fo_stat = dmabuf_stat, .fo_close = dmabuf_close, .fo_seek = dmabuf_seek, }; struct dma_buf * dma_buf_export(const struct dma_buf_export_info *info) { struct proc *p = curproc; struct dma_buf *dmabuf; struct file *fp; fp = fnew(p); if (fp == NULL) return ERR_PTR(-ENFILE); fp->f_type = DTYPE_DMABUF; fp->f_ops = &dmabufops; dmabuf = malloc(sizeof(struct dma_buf), M_DRM, M_WAITOK | M_ZERO); dmabuf->priv = info->priv; dmabuf->ops = info->ops; dmabuf->size = info->size; dmabuf->file = fp; fp->f_data = dmabuf; INIT_LIST_HEAD(&dmabuf->attachments); return dmabuf; } struct dma_buf * dma_buf_get(int fd) { struct proc *p = curproc; struct filedesc *fdp = p->p_fd; struct file *fp; if ((fp = fd_getfile(fdp, fd)) == NULL) return ERR_PTR(-EBADF); if (fp->f_type != DTYPE_DMABUF) { FRELE(fp, p); return ERR_PTR(-EINVAL); } return fp->f_data; } void dma_buf_put(struct dma_buf *dmabuf) { KASSERT(dmabuf); KASSERT(dmabuf->file); FRELE(dmabuf->file, curproc); } int dma_buf_fd(struct dma_buf *dmabuf, int flags) { struct proc *p = curproc; struct filedesc *fdp = p->p_fd; struct file *fp = dmabuf->file; int fd, cloexec, error; cloexec = (flags & O_CLOEXEC) ? UF_EXCLOSE : 0; fdplock(fdp); restart: if ((error = fdalloc(p, 0, &fd)) != 0) { if (error == ENOSPC) { fdexpand(p); goto restart; } fdpunlock(fdp); return -error; } fdinsert(fdp, fd, cloexec, fp); fdpunlock(fdp); return fd; } void get_dma_buf(struct dma_buf *dmabuf) { FREF(dmabuf->file); } enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *pdev) { pci_chipset_tag_t pc; pcitag_t tag; int pos ; pcireg_t xcap, lnkcap = 0, lnkcap2 = 0; pcireg_t id; enum pci_bus_speed cap = PCI_SPEED_UNKNOWN; int bus, device, function; if (pdev == NULL) return PCI_SPEED_UNKNOWN; pc = pdev->pc; tag = pdev->tag; if (!pci_get_capability(pc, tag, PCI_CAP_PCIEXPRESS, &pos, NULL)) return PCI_SPEED_UNKNOWN; id = pci_conf_read(pc, tag, PCI_ID_REG); pci_decompose_tag(pc, tag, &bus, &device, &function); /* we've been informed via and serverworks don't make the cut */ if (PCI_VENDOR(id) == PCI_VENDOR_VIATECH || PCI_VENDOR(id) == PCI_VENDOR_RCC) return PCI_SPEED_UNKNOWN; lnkcap = pci_conf_read(pc, tag, pos + PCI_PCIE_LCAP); xcap = pci_conf_read(pc, tag, pos + PCI_PCIE_XCAP); if (PCI_PCIE_XCAP_VER(xcap) >= 2) lnkcap2 = pci_conf_read(pc, tag, pos + PCI_PCIE_LCAP2); lnkcap &= 0x0f; lnkcap2 &= 0xfe; if (lnkcap2) { /* PCIE GEN 3.0 */ if (lnkcap2 & 0x02) cap = PCIE_SPEED_2_5GT; if (lnkcap2 & 0x04) cap = PCIE_SPEED_5_0GT; if (lnkcap2 & 0x08) cap = PCIE_SPEED_8_0GT; if (lnkcap2 & 0x10) cap = PCIE_SPEED_16_0GT; } else { if (lnkcap & 0x01) cap = PCIE_SPEED_2_5GT; if (lnkcap & 0x02) cap = PCIE_SPEED_5_0GT; } DRM_INFO("probing pcie caps for device %d:%d:%d 0x%04x:0x%04x = %x/%x\n", bus, device, function, PCI_VENDOR(id), PCI_PRODUCT(id), lnkcap, lnkcap2); return cap; } enum pcie_link_width pcie_get_width_cap(struct pci_dev *pdev) { pci_chipset_tag_t pc = pdev->pc; pcitag_t tag = pdev->tag; int pos ; pcireg_t lnkcap = 0; pcireg_t id; int bus, device, function; if (!pci_get_capability(pc, tag, PCI_CAP_PCIEXPRESS, &pos, NULL)) return PCIE_LNK_WIDTH_UNKNOWN; id = pci_conf_read(pc, tag, PCI_ID_REG); pci_decompose_tag(pc, tag, &bus, &device, &function); lnkcap = pci_conf_read(pc, tag, pos + PCI_PCIE_LCAP); DRM_INFO("probing pcie width for device %d:%d:%d 0x%04x:0x%04x = %x\n", bus, device, function, PCI_VENDOR(id), PCI_PRODUCT(id), lnkcap); if (lnkcap) return (lnkcap & 0x3f0) >> 4; return PCIE_LNK_WIDTH_UNKNOWN; } int autoremove_wake_function(struct wait_queue_entry *wqe, unsigned int mode, int sync, void *key) { wakeup(wqe); if (wqe->private) wake_up_process(wqe->private); list_del_init(&wqe->entry); return 0; } static wait_queue_head_t bit_waitq; wait_queue_head_t var_waitq; struct mutex wait_bit_mtx = MUTEX_INITIALIZER(IPL_TTY); int wait_on_bit(unsigned long *word, int bit, unsigned mode) { int err; if (!test_bit(bit, word)) return 0; mtx_enter(&wait_bit_mtx); while (test_bit(bit, word)) { err = msleep_nsec(word, &wait_bit_mtx, PWAIT | mode, "wtb", INFSLP); if (err) { mtx_leave(&wait_bit_mtx); return 1; } } mtx_leave(&wait_bit_mtx); return 0; } int wait_on_bit_timeout(unsigned long *word, int bit, unsigned mode, int timo) { int err; if (!test_bit(bit, word)) return 0; mtx_enter(&wait_bit_mtx); while (test_bit(bit, word)) { err = msleep(word, &wait_bit_mtx, PWAIT | mode, "wtb", timo); if (err) { mtx_leave(&wait_bit_mtx); return 1; } } mtx_leave(&wait_bit_mtx); return 0; } void wake_up_bit(void *word, int bit) { mtx_enter(&wait_bit_mtx); wakeup(word); mtx_leave(&wait_bit_mtx); } void clear_and_wake_up_bit(int bit, void *word) { clear_bit(bit, word); wake_up_bit(word, bit); } wait_queue_head_t * bit_waitqueue(void *word, int bit) { /* XXX hash table of wait queues? */ return &bit_waitq; } wait_queue_head_t * __var_waitqueue(void *p) { /* XXX hash table of wait queues? */ return &bit_waitq; } struct workqueue_struct *system_wq; struct workqueue_struct *system_highpri_wq; struct workqueue_struct *system_unbound_wq; struct workqueue_struct *system_long_wq; struct taskq *taskletq; void drm_linux_init(void) { system_wq = (struct workqueue_struct *) taskq_create("drmwq", 4, IPL_HIGH, 0); system_highpri_wq = (struct workqueue_struct *) taskq_create("drmhpwq", 4, IPL_HIGH, 0); system_unbound_wq = (struct workqueue_struct *) taskq_create("drmubwq", 4, IPL_HIGH, 0); system_long_wq = (struct workqueue_struct *) taskq_create("drmlwq", 4, IPL_HIGH, 0); taskletq = taskq_create("drmtskl", 1, IPL_HIGH, 0); init_waitqueue_head(&bit_waitq); init_waitqueue_head(&var_waitq); pool_init(&idr_pool, sizeof(struct idr_entry), 0, IPL_TTY, 0, "idrpl", NULL); kmap_atomic_va = (vaddr_t)km_alloc(PAGE_SIZE, &kv_any, &kp_none, &kd_waitok); } void drm_linux_exit(void) { pool_destroy(&idr_pool); taskq_destroy(taskletq); taskq_destroy((struct taskq *)system_long_wq); taskq_destroy((struct taskq *)system_unbound_wq); taskq_destroy((struct taskq *)system_highpri_wq); taskq_destroy((struct taskq *)system_wq); } #define PCIE_ECAP_RESIZE_BAR 0x15 #define RBCAP0 0x04 #define RBCTRL0 0x08 #define RBCTRL_BARINDEX_MASK 0x07 #define RBCTRL_BARSIZE_MASK 0x1f00 #define RBCTRL_BARSIZE_SHIFT 8 /* size in MB is 1 << nsize */ int pci_resize_resource(struct pci_dev *pdev, int bar, int nsize) { pcireg_t reg; uint32_t offset, capid; KASSERT(bar == 0); offset = PCI_PCIE_ECAP; /* search PCI Express Extended Capabilities */ do { reg = pci_conf_read(pdev->pc, pdev->tag, offset); capid = PCI_PCIE_ECAP_ID(reg); if (capid == PCIE_ECAP_RESIZE_BAR) break; offset = PCI_PCIE_ECAP_NEXT(reg); } while (capid != 0); if (capid == 0) { printf("%s: could not find resize bar cap!\n", __func__); return -ENOTSUP; } reg = pci_conf_read(pdev->pc, pdev->tag, offset + RBCAP0); if ((reg & (1 << (nsize + 4))) == 0) { printf("%s size not supported\n", __func__); return -ENOTSUP; } reg = pci_conf_read(pdev->pc, pdev->tag, offset + RBCTRL0); if ((reg & RBCTRL_BARINDEX_MASK) != 0) { printf("%s BAR index not 0\n", __func__); return -EINVAL; } reg &= ~RBCTRL_BARSIZE_MASK; reg |= (nsize << RBCTRL_BARSIZE_SHIFT) & RBCTRL_BARSIZE_MASK; pci_conf_write(pdev->pc, pdev->tag, offset + RBCTRL0, reg); return 0; } TAILQ_HEAD(, shrinker) shrinkers = TAILQ_HEAD_INITIALIZER(shrinkers); int register_shrinker(struct shrinker *shrinker) { TAILQ_INSERT_TAIL(&shrinkers, shrinker, next); return 0; } void unregister_shrinker(struct shrinker *shrinker) { TAILQ_REMOVE(&shrinkers, shrinker, next); } void drmbackoff(long npages) { struct shrink_control sc; struct shrinker *shrinker; u_long ret; shrinker = TAILQ_FIRST(&shrinkers); while (shrinker && npages > 0) { sc.nr_to_scan = npages; ret = shrinker->scan_objects(shrinker, &sc); npages -= ret; shrinker = TAILQ_NEXT(shrinker, next); } } void * bitmap_zalloc(u_int n, gfp_t flags) { return kcalloc(BITS_TO_LONGS(n), sizeof(long), flags); } void bitmap_free(void *p) { kfree(p); } int atomic_dec_and_mutex_lock(volatile int *v, struct rwlock *lock) { if (atomic_add_unless(v, -1, 1)) return 0; rw_enter_write(lock); if (atomic_dec_return(v) == 0) return 1; rw_exit_write(lock); return 0; } int printk(const char *fmt, ...) { int ret, level; va_list ap; if (fmt != NULL && *fmt == '\001') { level = fmt[1]; #ifndef DRMDEBUG if (level >= KERN_INFO[1] && level <= '9') return 0; #endif fmt += 2; } va_start(ap, fmt); ret = vprintf(fmt, ap); va_end(ap); return ret; } #define START(node) ((node)->start) #define LAST(node) ((node)->last) struct interval_tree_node * interval_tree_iter_first(struct rb_root_cached *root, unsigned long start, unsigned long last) { struct interval_tree_node *node; struct rb_node *rb; for (rb = rb_first_cached(root); rb; rb = rb_next(rb)) { node = rb_entry(rb, typeof(*node), rb); if (LAST(node) >= start && START(node) <= last) return node; } return NULL; } void interval_tree_remove(struct interval_tree_node *node, struct rb_root_cached *root) { rb_erase_cached(&node->rb, root); } void interval_tree_insert(struct interval_tree_node *node, struct rb_root_cached *root) { struct rb_node **iter = &root->rb_root.rb_node; struct rb_node *parent = NULL; struct interval_tree_node *iter_node; while (*iter) { parent = *iter; iter_node = rb_entry(*iter, struct interval_tree_node, rb); if (node->start < iter_node->start) iter = &(*iter)->rb_left; else iter = &(*iter)->rb_right; } rb_link_node(&node->rb, parent, iter); rb_insert_color_cached(&node->rb, root, false); }