939 lines
20 KiB
C
939 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright IBM Corp. 2012
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*
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* Author(s):
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* Jan Glauber <jang@linux.vnet.ibm.com>
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*
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* The System z PCI code is a rewrite from a prototype by
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* the following people (Kudoz!):
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* Alexander Schmidt
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* Christoph Raisch
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* Hannes Hering
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* Hoang-Nam Nguyen
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* Jan-Bernd Themann
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* Stefan Roscher
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* Thomas Klein
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*/
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#define KMSG_COMPONENT "zpci"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/export.h>
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#include <linux/delay.h>
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#include <linux/seq_file.h>
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#include <linux/jump_label.h>
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#include <linux/pci.h>
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#include <asm/isc.h>
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#include <asm/airq.h>
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#include <asm/facility.h>
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#include <asm/pci_insn.h>
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#include <asm/pci_clp.h>
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#include <asm/pci_dma.h>
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/* list of all detected zpci devices */
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static LIST_HEAD(zpci_list);
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static DEFINE_SPINLOCK(zpci_list_lock);
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static DECLARE_BITMAP(zpci_domain, ZPCI_NR_DEVICES);
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static DEFINE_SPINLOCK(zpci_domain_lock);
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#define ZPCI_IOMAP_ENTRIES \
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min(((unsigned long) ZPCI_NR_DEVICES * PCI_BAR_COUNT / 2), \
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ZPCI_IOMAP_MAX_ENTRIES)
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static DEFINE_SPINLOCK(zpci_iomap_lock);
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static unsigned long *zpci_iomap_bitmap;
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struct zpci_iomap_entry *zpci_iomap_start;
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EXPORT_SYMBOL_GPL(zpci_iomap_start);
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DEFINE_STATIC_KEY_FALSE(have_mio);
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static struct kmem_cache *zdev_fmb_cache;
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struct zpci_dev *get_zdev_by_fid(u32 fid)
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{
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struct zpci_dev *tmp, *zdev = NULL;
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spin_lock(&zpci_list_lock);
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list_for_each_entry(tmp, &zpci_list, entry) {
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if (tmp->fid == fid) {
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zdev = tmp;
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break;
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}
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}
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spin_unlock(&zpci_list_lock);
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return zdev;
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}
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void zpci_remove_reserved_devices(void)
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{
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struct zpci_dev *tmp, *zdev;
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enum zpci_state state;
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LIST_HEAD(remove);
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spin_lock(&zpci_list_lock);
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list_for_each_entry_safe(zdev, tmp, &zpci_list, entry) {
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if (zdev->state == ZPCI_FN_STATE_STANDBY &&
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!clp_get_state(zdev->fid, &state) &&
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state == ZPCI_FN_STATE_RESERVED)
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list_move_tail(&zdev->entry, &remove);
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}
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spin_unlock(&zpci_list_lock);
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list_for_each_entry_safe(zdev, tmp, &remove, entry)
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zpci_remove_device(zdev);
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}
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static struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus)
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{
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return (bus && bus->sysdata) ? (struct zpci_dev *) bus->sysdata : NULL;
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}
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int pci_domain_nr(struct pci_bus *bus)
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{
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return ((struct zpci_dev *) bus->sysdata)->domain;
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}
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EXPORT_SYMBOL_GPL(pci_domain_nr);
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int pci_proc_domain(struct pci_bus *bus)
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{
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return pci_domain_nr(bus);
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}
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EXPORT_SYMBOL_GPL(pci_proc_domain);
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/* Modify PCI: Register I/O address translation parameters */
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int zpci_register_ioat(struct zpci_dev *zdev, u8 dmaas,
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u64 base, u64 limit, u64 iota)
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{
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u64 req = ZPCI_CREATE_REQ(zdev->fh, dmaas, ZPCI_MOD_FC_REG_IOAT);
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struct zpci_fib fib = {0};
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u8 status;
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WARN_ON_ONCE(iota & 0x3fff);
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fib.pba = base;
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fib.pal = limit;
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fib.iota = iota | ZPCI_IOTA_RTTO_FLAG;
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return zpci_mod_fc(req, &fib, &status) ? -EIO : 0;
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}
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/* Modify PCI: Unregister I/O address translation parameters */
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int zpci_unregister_ioat(struct zpci_dev *zdev, u8 dmaas)
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{
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u64 req = ZPCI_CREATE_REQ(zdev->fh, dmaas, ZPCI_MOD_FC_DEREG_IOAT);
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struct zpci_fib fib = {0};
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u8 cc, status;
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cc = zpci_mod_fc(req, &fib, &status);
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if (cc == 3) /* Function already gone. */
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cc = 0;
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return cc ? -EIO : 0;
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}
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/* Modify PCI: Set PCI function measurement parameters */
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int zpci_fmb_enable_device(struct zpci_dev *zdev)
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{
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u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_SET_MEASURE);
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struct zpci_fib fib = {0};
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u8 cc, status;
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if (zdev->fmb || sizeof(*zdev->fmb) < zdev->fmb_length)
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return -EINVAL;
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zdev->fmb = kmem_cache_zalloc(zdev_fmb_cache, GFP_KERNEL);
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if (!zdev->fmb)
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return -ENOMEM;
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WARN_ON((u64) zdev->fmb & 0xf);
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/* reset software counters */
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atomic64_set(&zdev->allocated_pages, 0);
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atomic64_set(&zdev->mapped_pages, 0);
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atomic64_set(&zdev->unmapped_pages, 0);
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fib.fmb_addr = virt_to_phys(zdev->fmb);
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cc = zpci_mod_fc(req, &fib, &status);
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if (cc) {
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kmem_cache_free(zdev_fmb_cache, zdev->fmb);
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zdev->fmb = NULL;
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}
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return cc ? -EIO : 0;
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}
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/* Modify PCI: Disable PCI function measurement */
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int zpci_fmb_disable_device(struct zpci_dev *zdev)
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{
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u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_SET_MEASURE);
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struct zpci_fib fib = {0};
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u8 cc, status;
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if (!zdev->fmb)
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return -EINVAL;
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/* Function measurement is disabled if fmb address is zero */
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cc = zpci_mod_fc(req, &fib, &status);
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if (cc == 3) /* Function already gone. */
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cc = 0;
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if (!cc) {
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kmem_cache_free(zdev_fmb_cache, zdev->fmb);
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zdev->fmb = NULL;
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}
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return cc ? -EIO : 0;
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}
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static int zpci_cfg_load(struct zpci_dev *zdev, int offset, u32 *val, u8 len)
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{
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u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
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u64 data;
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int rc;
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rc = __zpci_load(&data, req, offset);
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if (!rc) {
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data = le64_to_cpu((__force __le64) data);
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data >>= (8 - len) * 8;
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*val = (u32) data;
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} else
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*val = 0xffffffff;
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return rc;
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}
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static int zpci_cfg_store(struct zpci_dev *zdev, int offset, u32 val, u8 len)
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{
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u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
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u64 data = val;
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int rc;
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data <<= (8 - len) * 8;
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data = (__force u64) cpu_to_le64(data);
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rc = __zpci_store(data, req, offset);
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return rc;
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}
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resource_size_t pcibios_align_resource(void *data, const struct resource *res,
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resource_size_t size,
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resource_size_t align)
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{
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return 0;
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}
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/* combine single writes by using store-block insn */
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void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
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{
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zpci_memcpy_toio(to, from, count);
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}
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void __iomem *ioremap(unsigned long ioaddr, unsigned long size)
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{
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struct vm_struct *area;
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unsigned long offset;
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if (!size)
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return NULL;
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if (!static_branch_unlikely(&have_mio))
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return (void __iomem *) ioaddr;
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offset = ioaddr & ~PAGE_MASK;
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ioaddr &= PAGE_MASK;
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size = PAGE_ALIGN(size + offset);
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area = get_vm_area(size, VM_IOREMAP);
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if (!area)
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return NULL;
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if (ioremap_page_range((unsigned long) area->addr,
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(unsigned long) area->addr + size,
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ioaddr, PAGE_KERNEL)) {
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vunmap(area->addr);
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return NULL;
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}
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return (void __iomem *) ((unsigned long) area->addr + offset);
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}
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EXPORT_SYMBOL(ioremap);
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void iounmap(volatile void __iomem *addr)
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{
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if (static_branch_likely(&have_mio))
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vunmap((__force void *) ((unsigned long) addr & PAGE_MASK));
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}
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EXPORT_SYMBOL(iounmap);
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/* Create a virtual mapping cookie for a PCI BAR */
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static void __iomem *pci_iomap_range_fh(struct pci_dev *pdev, int bar,
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unsigned long offset, unsigned long max)
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{
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struct zpci_dev *zdev = to_zpci(pdev);
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int idx;
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idx = zdev->bars[bar].map_idx;
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spin_lock(&zpci_iomap_lock);
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/* Detect overrun */
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WARN_ON(!++zpci_iomap_start[idx].count);
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zpci_iomap_start[idx].fh = zdev->fh;
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zpci_iomap_start[idx].bar = bar;
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spin_unlock(&zpci_iomap_lock);
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return (void __iomem *) ZPCI_ADDR(idx) + offset;
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}
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static void __iomem *pci_iomap_range_mio(struct pci_dev *pdev, int bar,
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unsigned long offset,
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unsigned long max)
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{
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unsigned long barsize = pci_resource_len(pdev, bar);
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struct zpci_dev *zdev = to_zpci(pdev);
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void __iomem *iova;
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iova = ioremap((unsigned long) zdev->bars[bar].mio_wt, barsize);
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return iova ? iova + offset : iova;
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}
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void __iomem *pci_iomap_range(struct pci_dev *pdev, int bar,
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unsigned long offset, unsigned long max)
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{
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if (!pci_resource_len(pdev, bar) || bar >= PCI_BAR_COUNT)
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return NULL;
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if (static_branch_likely(&have_mio))
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return pci_iomap_range_mio(pdev, bar, offset, max);
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else
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return pci_iomap_range_fh(pdev, bar, offset, max);
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}
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EXPORT_SYMBOL(pci_iomap_range);
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void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
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{
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return pci_iomap_range(dev, bar, 0, maxlen);
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}
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EXPORT_SYMBOL(pci_iomap);
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static void __iomem *pci_iomap_wc_range_mio(struct pci_dev *pdev, int bar,
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unsigned long offset, unsigned long max)
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{
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unsigned long barsize = pci_resource_len(pdev, bar);
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struct zpci_dev *zdev = to_zpci(pdev);
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void __iomem *iova;
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iova = ioremap((unsigned long) zdev->bars[bar].mio_wb, barsize);
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return iova ? iova + offset : iova;
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}
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void __iomem *pci_iomap_wc_range(struct pci_dev *pdev, int bar,
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unsigned long offset, unsigned long max)
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{
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if (!pci_resource_len(pdev, bar) || bar >= PCI_BAR_COUNT)
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return NULL;
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if (static_branch_likely(&have_mio))
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return pci_iomap_wc_range_mio(pdev, bar, offset, max);
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else
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return pci_iomap_range_fh(pdev, bar, offset, max);
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}
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EXPORT_SYMBOL(pci_iomap_wc_range);
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void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long maxlen)
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{
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return pci_iomap_wc_range(dev, bar, 0, maxlen);
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}
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EXPORT_SYMBOL(pci_iomap_wc);
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static void pci_iounmap_fh(struct pci_dev *pdev, void __iomem *addr)
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{
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unsigned int idx = ZPCI_IDX(addr);
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spin_lock(&zpci_iomap_lock);
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/* Detect underrun */
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WARN_ON(!zpci_iomap_start[idx].count);
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if (!--zpci_iomap_start[idx].count) {
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zpci_iomap_start[idx].fh = 0;
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zpci_iomap_start[idx].bar = 0;
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}
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spin_unlock(&zpci_iomap_lock);
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}
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static void pci_iounmap_mio(struct pci_dev *pdev, void __iomem *addr)
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{
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iounmap(addr);
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}
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void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
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{
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if (static_branch_likely(&have_mio))
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pci_iounmap_mio(pdev, addr);
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else
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pci_iounmap_fh(pdev, addr);
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}
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EXPORT_SYMBOL(pci_iounmap);
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static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
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int size, u32 *val)
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{
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struct zpci_dev *zdev = get_zdev_by_bus(bus);
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int ret;
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if (!zdev || devfn != ZPCI_DEVFN)
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ret = -ENODEV;
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else
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ret = zpci_cfg_load(zdev, where, val, size);
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return ret;
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}
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static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
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int size, u32 val)
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{
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struct zpci_dev *zdev = get_zdev_by_bus(bus);
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int ret;
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if (!zdev || devfn != ZPCI_DEVFN)
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ret = -ENODEV;
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else
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ret = zpci_cfg_store(zdev, where, val, size);
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return ret;
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}
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static struct pci_ops pci_root_ops = {
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.read = pci_read,
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.write = pci_write,
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};
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#ifdef CONFIG_PCI_IOV
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static struct resource iov_res = {
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.name = "PCI IOV res",
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.start = 0,
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.end = -1,
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.flags = IORESOURCE_MEM,
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};
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#endif
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static void zpci_map_resources(struct pci_dev *pdev)
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{
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struct zpci_dev *zdev = to_zpci(pdev);
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resource_size_t len;
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int i;
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for (i = 0; i < PCI_BAR_COUNT; i++) {
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len = pci_resource_len(pdev, i);
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if (!len)
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continue;
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if (zpci_use_mio(zdev))
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pdev->resource[i].start =
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(resource_size_t __force) zdev->bars[i].mio_wb;
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else
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pdev->resource[i].start = (resource_size_t __force)
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pci_iomap_range_fh(pdev, i, 0, 0);
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pdev->resource[i].end = pdev->resource[i].start + len - 1;
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}
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#ifdef CONFIG_PCI_IOV
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i = PCI_IOV_RESOURCES;
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for (; i < PCI_SRIOV_NUM_BARS + PCI_IOV_RESOURCES; i++) {
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len = pci_resource_len(pdev, i);
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if (!len)
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continue;
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pdev->resource[i].parent = &iov_res;
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}
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#endif
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}
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static void zpci_unmap_resources(struct pci_dev *pdev)
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{
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struct zpci_dev *zdev = to_zpci(pdev);
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resource_size_t len;
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int i;
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if (zpci_use_mio(zdev))
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return;
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for (i = 0; i < PCI_BAR_COUNT; i++) {
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len = pci_resource_len(pdev, i);
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if (!len)
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continue;
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pci_iounmap_fh(pdev, (void __iomem __force *)
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pdev->resource[i].start);
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}
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}
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static int zpci_alloc_iomap(struct zpci_dev *zdev)
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{
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unsigned long entry;
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spin_lock(&zpci_iomap_lock);
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entry = find_first_zero_bit(zpci_iomap_bitmap, ZPCI_IOMAP_ENTRIES);
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if (entry == ZPCI_IOMAP_ENTRIES) {
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spin_unlock(&zpci_iomap_lock);
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return -ENOSPC;
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}
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set_bit(entry, zpci_iomap_bitmap);
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spin_unlock(&zpci_iomap_lock);
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return entry;
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}
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static void zpci_free_iomap(struct zpci_dev *zdev, int entry)
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{
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spin_lock(&zpci_iomap_lock);
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memset(&zpci_iomap_start[entry], 0, sizeof(struct zpci_iomap_entry));
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clear_bit(entry, zpci_iomap_bitmap);
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spin_unlock(&zpci_iomap_lock);
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}
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static struct resource *__alloc_res(struct zpci_dev *zdev, unsigned long start,
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unsigned long size, unsigned long flags)
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{
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struct resource *r;
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r = kzalloc(sizeof(*r), GFP_KERNEL);
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if (!r)
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return NULL;
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r->start = start;
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r->end = r->start + size - 1;
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r->flags = flags;
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r->name = zdev->res_name;
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if (request_resource(&iomem_resource, r)) {
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kfree(r);
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return NULL;
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}
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return r;
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}
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|
|
static int zpci_setup_bus_resources(struct zpci_dev *zdev,
|
|
struct list_head *resources)
|
|
{
|
|
unsigned long addr, size, flags;
|
|
struct resource *res;
|
|
int i, entry;
|
|
|
|
snprintf(zdev->res_name, sizeof(zdev->res_name),
|
|
"PCI Bus %04x:%02x", zdev->domain, ZPCI_BUS_NR);
|
|
|
|
for (i = 0; i < PCI_BAR_COUNT; i++) {
|
|
if (!zdev->bars[i].size)
|
|
continue;
|
|
entry = zpci_alloc_iomap(zdev);
|
|
if (entry < 0)
|
|
return entry;
|
|
zdev->bars[i].map_idx = entry;
|
|
|
|
/* only MMIO is supported */
|
|
flags = IORESOURCE_MEM;
|
|
if (zdev->bars[i].val & 8)
|
|
flags |= IORESOURCE_PREFETCH;
|
|
if (zdev->bars[i].val & 4)
|
|
flags |= IORESOURCE_MEM_64;
|
|
|
|
if (zpci_use_mio(zdev))
|
|
addr = (unsigned long) zdev->bars[i].mio_wb;
|
|
else
|
|
addr = ZPCI_ADDR(entry);
|
|
size = 1UL << zdev->bars[i].size;
|
|
|
|
res = __alloc_res(zdev, addr, size, flags);
|
|
if (!res) {
|
|
zpci_free_iomap(zdev, entry);
|
|
return -ENOMEM;
|
|
}
|
|
zdev->bars[i].res = res;
|
|
pci_add_resource(resources, res);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void zpci_cleanup_bus_resources(struct zpci_dev *zdev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < PCI_BAR_COUNT; i++) {
|
|
if (!zdev->bars[i].size || !zdev->bars[i].res)
|
|
continue;
|
|
|
|
zpci_free_iomap(zdev, zdev->bars[i].map_idx);
|
|
release_resource(zdev->bars[i].res);
|
|
kfree(zdev->bars[i].res);
|
|
}
|
|
}
|
|
|
|
int pcibios_add_device(struct pci_dev *pdev)
|
|
{
|
|
struct resource *res;
|
|
int i;
|
|
|
|
if (pdev->is_physfn)
|
|
pdev->no_vf_scan = 1;
|
|
|
|
pdev->dev.groups = zpci_attr_groups;
|
|
pdev->dev.dma_ops = &s390_pci_dma_ops;
|
|
zpci_map_resources(pdev);
|
|
|
|
for (i = 0; i < PCI_BAR_COUNT; i++) {
|
|
res = &pdev->resource[i];
|
|
if (res->parent || !res->flags)
|
|
continue;
|
|
pci_claim_resource(pdev, i);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void pcibios_release_device(struct pci_dev *pdev)
|
|
{
|
|
zpci_unmap_resources(pdev);
|
|
}
|
|
|
|
int pcibios_enable_device(struct pci_dev *pdev, int mask)
|
|
{
|
|
struct zpci_dev *zdev = to_zpci(pdev);
|
|
|
|
zpci_debug_init_device(zdev, dev_name(&pdev->dev));
|
|
zpci_fmb_enable_device(zdev);
|
|
|
|
return pci_enable_resources(pdev, mask);
|
|
}
|
|
|
|
void pcibios_disable_device(struct pci_dev *pdev)
|
|
{
|
|
struct zpci_dev *zdev = to_zpci(pdev);
|
|
|
|
zpci_fmb_disable_device(zdev);
|
|
zpci_debug_exit_device(zdev);
|
|
}
|
|
|
|
#ifdef CONFIG_HIBERNATE_CALLBACKS
|
|
static int zpci_restore(struct device *dev)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(dev);
|
|
struct zpci_dev *zdev = to_zpci(pdev);
|
|
int ret = 0;
|
|
|
|
if (zdev->state != ZPCI_FN_STATE_ONLINE)
|
|
goto out;
|
|
|
|
ret = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
|
|
if (ret)
|
|
goto out;
|
|
|
|
zpci_map_resources(pdev);
|
|
zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma,
|
|
(u64) zdev->dma_table);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int zpci_freeze(struct device *dev)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(dev);
|
|
struct zpci_dev *zdev = to_zpci(pdev);
|
|
|
|
if (zdev->state != ZPCI_FN_STATE_ONLINE)
|
|
return 0;
|
|
|
|
zpci_unregister_ioat(zdev, 0);
|
|
zpci_unmap_resources(pdev);
|
|
return clp_disable_fh(zdev);
|
|
}
|
|
|
|
struct dev_pm_ops pcibios_pm_ops = {
|
|
.thaw_noirq = zpci_restore,
|
|
.freeze_noirq = zpci_freeze,
|
|
.restore_noirq = zpci_restore,
|
|
.poweroff_noirq = zpci_freeze,
|
|
};
|
|
#endif /* CONFIG_HIBERNATE_CALLBACKS */
|
|
|
|
static int zpci_alloc_domain(struct zpci_dev *zdev)
|
|
{
|
|
if (zpci_unique_uid) {
|
|
zdev->domain = (u16) zdev->uid;
|
|
if (zdev->domain >= ZPCI_NR_DEVICES)
|
|
return 0;
|
|
|
|
spin_lock(&zpci_domain_lock);
|
|
if (test_bit(zdev->domain, zpci_domain)) {
|
|
spin_unlock(&zpci_domain_lock);
|
|
return -EEXIST;
|
|
}
|
|
set_bit(zdev->domain, zpci_domain);
|
|
spin_unlock(&zpci_domain_lock);
|
|
return 0;
|
|
}
|
|
|
|
spin_lock(&zpci_domain_lock);
|
|
zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
|
|
if (zdev->domain == ZPCI_NR_DEVICES) {
|
|
spin_unlock(&zpci_domain_lock);
|
|
return -ENOSPC;
|
|
}
|
|
set_bit(zdev->domain, zpci_domain);
|
|
spin_unlock(&zpci_domain_lock);
|
|
return 0;
|
|
}
|
|
|
|
static void zpci_free_domain(struct zpci_dev *zdev)
|
|
{
|
|
if (zdev->domain >= ZPCI_NR_DEVICES)
|
|
return;
|
|
|
|
spin_lock(&zpci_domain_lock);
|
|
clear_bit(zdev->domain, zpci_domain);
|
|
spin_unlock(&zpci_domain_lock);
|
|
}
|
|
|
|
void pcibios_remove_bus(struct pci_bus *bus)
|
|
{
|
|
struct zpci_dev *zdev = get_zdev_by_bus(bus);
|
|
|
|
zpci_exit_slot(zdev);
|
|
zpci_cleanup_bus_resources(zdev);
|
|
zpci_destroy_iommu(zdev);
|
|
zpci_free_domain(zdev);
|
|
|
|
spin_lock(&zpci_list_lock);
|
|
list_del(&zdev->entry);
|
|
spin_unlock(&zpci_list_lock);
|
|
|
|
zpci_dbg(3, "rem fid:%x\n", zdev->fid);
|
|
kfree(zdev);
|
|
}
|
|
|
|
static int zpci_scan_bus(struct zpci_dev *zdev)
|
|
{
|
|
LIST_HEAD(resources);
|
|
int ret;
|
|
|
|
ret = zpci_setup_bus_resources(zdev, &resources);
|
|
if (ret)
|
|
goto error;
|
|
|
|
zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
|
|
zdev, &resources);
|
|
if (!zdev->bus) {
|
|
ret = -EIO;
|
|
goto error;
|
|
}
|
|
zdev->bus->max_bus_speed = zdev->max_bus_speed;
|
|
pci_bus_add_devices(zdev->bus);
|
|
return 0;
|
|
|
|
error:
|
|
zpci_cleanup_bus_resources(zdev);
|
|
pci_free_resource_list(&resources);
|
|
return ret;
|
|
}
|
|
|
|
int zpci_enable_device(struct zpci_dev *zdev)
|
|
{
|
|
int rc;
|
|
|
|
rc = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
|
|
if (rc)
|
|
goto out;
|
|
|
|
rc = zpci_dma_init_device(zdev);
|
|
if (rc)
|
|
goto out_dma;
|
|
|
|
zdev->state = ZPCI_FN_STATE_ONLINE;
|
|
return 0;
|
|
|
|
out_dma:
|
|
clp_disable_fh(zdev);
|
|
out:
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(zpci_enable_device);
|
|
|
|
int zpci_disable_device(struct zpci_dev *zdev)
|
|
{
|
|
zpci_dma_exit_device(zdev);
|
|
return clp_disable_fh(zdev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(zpci_disable_device);
|
|
|
|
int zpci_create_device(struct zpci_dev *zdev)
|
|
{
|
|
int rc;
|
|
|
|
rc = zpci_alloc_domain(zdev);
|
|
if (rc)
|
|
goto out;
|
|
|
|
rc = zpci_init_iommu(zdev);
|
|
if (rc)
|
|
goto out_free;
|
|
|
|
mutex_init(&zdev->lock);
|
|
if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
|
|
rc = zpci_enable_device(zdev);
|
|
if (rc)
|
|
goto out_destroy_iommu;
|
|
}
|
|
rc = zpci_scan_bus(zdev);
|
|
if (rc)
|
|
goto out_disable;
|
|
|
|
spin_lock(&zpci_list_lock);
|
|
list_add_tail(&zdev->entry, &zpci_list);
|
|
spin_unlock(&zpci_list_lock);
|
|
|
|
zpci_init_slot(zdev);
|
|
|
|
return 0;
|
|
|
|
out_disable:
|
|
if (zdev->state == ZPCI_FN_STATE_ONLINE)
|
|
zpci_disable_device(zdev);
|
|
out_destroy_iommu:
|
|
zpci_destroy_iommu(zdev);
|
|
out_free:
|
|
zpci_free_domain(zdev);
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
void zpci_remove_device(struct zpci_dev *zdev)
|
|
{
|
|
if (!zdev->bus)
|
|
return;
|
|
|
|
pci_stop_root_bus(zdev->bus);
|
|
pci_remove_root_bus(zdev->bus);
|
|
}
|
|
|
|
int zpci_report_error(struct pci_dev *pdev,
|
|
struct zpci_report_error_header *report)
|
|
{
|
|
struct zpci_dev *zdev = to_zpci(pdev);
|
|
|
|
return sclp_pci_report(report, zdev->fh, zdev->fid);
|
|
}
|
|
EXPORT_SYMBOL(zpci_report_error);
|
|
|
|
static int zpci_mem_init(void)
|
|
{
|
|
BUILD_BUG_ON(!is_power_of_2(__alignof__(struct zpci_fmb)) ||
|
|
__alignof__(struct zpci_fmb) < sizeof(struct zpci_fmb));
|
|
|
|
zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
|
|
__alignof__(struct zpci_fmb), 0, NULL);
|
|
if (!zdev_fmb_cache)
|
|
goto error_fmb;
|
|
|
|
zpci_iomap_start = kcalloc(ZPCI_IOMAP_ENTRIES,
|
|
sizeof(*zpci_iomap_start), GFP_KERNEL);
|
|
if (!zpci_iomap_start)
|
|
goto error_iomap;
|
|
|
|
zpci_iomap_bitmap = kcalloc(BITS_TO_LONGS(ZPCI_IOMAP_ENTRIES),
|
|
sizeof(*zpci_iomap_bitmap), GFP_KERNEL);
|
|
if (!zpci_iomap_bitmap)
|
|
goto error_iomap_bitmap;
|
|
|
|
return 0;
|
|
error_iomap_bitmap:
|
|
kfree(zpci_iomap_start);
|
|
error_iomap:
|
|
kmem_cache_destroy(zdev_fmb_cache);
|
|
error_fmb:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static void zpci_mem_exit(void)
|
|
{
|
|
kfree(zpci_iomap_bitmap);
|
|
kfree(zpci_iomap_start);
|
|
kmem_cache_destroy(zdev_fmb_cache);
|
|
}
|
|
|
|
static unsigned int s390_pci_probe __initdata = 1;
|
|
static unsigned int s390_pci_no_mio __initdata;
|
|
unsigned int s390_pci_force_floating __initdata;
|
|
static unsigned int s390_pci_initialized;
|
|
|
|
char * __init pcibios_setup(char *str)
|
|
{
|
|
if (!strcmp(str, "off")) {
|
|
s390_pci_probe = 0;
|
|
return NULL;
|
|
}
|
|
if (!strcmp(str, "nomio")) {
|
|
s390_pci_no_mio = 1;
|
|
return NULL;
|
|
}
|
|
if (!strcmp(str, "force_floating")) {
|
|
s390_pci_force_floating = 1;
|
|
return NULL;
|
|
}
|
|
return str;
|
|
}
|
|
|
|
bool zpci_is_enabled(void)
|
|
{
|
|
return s390_pci_initialized;
|
|
}
|
|
|
|
static int __init pci_base_init(void)
|
|
{
|
|
int rc;
|
|
|
|
if (!s390_pci_probe)
|
|
return 0;
|
|
|
|
if (!test_facility(69) || !test_facility(71))
|
|
return 0;
|
|
|
|
if (test_facility(153) && !s390_pci_no_mio) {
|
|
static_branch_enable(&have_mio);
|
|
ctl_set_bit(2, 5);
|
|
}
|
|
|
|
rc = zpci_debug_init();
|
|
if (rc)
|
|
goto out;
|
|
|
|
rc = zpci_mem_init();
|
|
if (rc)
|
|
goto out_mem;
|
|
|
|
rc = zpci_irq_init();
|
|
if (rc)
|
|
goto out_irq;
|
|
|
|
rc = zpci_dma_init();
|
|
if (rc)
|
|
goto out_dma;
|
|
|
|
rc = clp_scan_pci_devices();
|
|
if (rc)
|
|
goto out_find;
|
|
|
|
s390_pci_initialized = 1;
|
|
return 0;
|
|
|
|
out_find:
|
|
zpci_dma_exit();
|
|
out_dma:
|
|
zpci_irq_exit();
|
|
out_irq:
|
|
zpci_mem_exit();
|
|
out_mem:
|
|
zpci_debug_exit();
|
|
out:
|
|
return rc;
|
|
}
|
|
subsys_initcall_sync(pci_base_init);
|
|
|
|
void zpci_rescan(void)
|
|
{
|
|
if (zpci_is_enabled())
|
|
clp_rescan_pci_devices_simple();
|
|
}
|