Update Linux to v5.10.109
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz
Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index b8ddacf..e14e4a3 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -27,6 +27,7 @@
#include <linux/seq_file.h>
#include <linux/jump_label.h>
#include <linux/pci.h>
+#include <linux/printk.h>
#include <asm/isc.h>
#include <asm/airq.h>
@@ -35,17 +36,22 @@
#include <asm/pci_clp.h>
#include <asm/pci_dma.h>
+#include "pci_bus.h"
+#include "pci_iov.h"
+
/* list of all detected zpci devices */
static LIST_HEAD(zpci_list);
static DEFINE_SPINLOCK(zpci_list_lock);
-static DECLARE_BITMAP(zpci_domain, ZPCI_NR_DEVICES);
+static DECLARE_BITMAP(zpci_domain, ZPCI_DOMAIN_BITMAP_SIZE);
static DEFINE_SPINLOCK(zpci_domain_lock);
#define ZPCI_IOMAP_ENTRIES \
- min(((unsigned long) ZPCI_NR_DEVICES * PCI_BAR_COUNT / 2), \
+ min(((unsigned long) ZPCI_NR_DEVICES * PCI_STD_NUM_BARS / 2), \
ZPCI_IOMAP_MAX_ENTRIES)
+unsigned int s390_pci_no_rid;
+
static DEFINE_SPINLOCK(zpci_iomap_lock);
static unsigned long *zpci_iomap_bitmap;
struct zpci_iomap_entry *zpci_iomap_start;
@@ -86,17 +92,12 @@
spin_unlock(&zpci_list_lock);
list_for_each_entry_safe(zdev, tmp, &remove, entry)
- zpci_remove_device(zdev);
-}
-
-static struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus)
-{
- return (bus && bus->sysdata) ? (struct zpci_dev *) bus->sysdata : NULL;
+ zpci_device_reserved(zdev);
}
int pci_domain_nr(struct pci_bus *bus)
{
- return ((struct zpci_dev *) bus->sysdata)->domain;
+ return ((struct zpci_bus *) bus->sysdata)->domain_nr;
}
EXPORT_SYMBOL_GPL(pci_domain_nr);
@@ -226,34 +227,58 @@
zpci_memcpy_toio(to, from, count);
}
-void __iomem *ioremap(unsigned long ioaddr, unsigned long size)
+static void __iomem *__ioremap(phys_addr_t addr, size_t size, pgprot_t prot)
{
+ unsigned long offset, vaddr;
struct vm_struct *area;
- unsigned long offset;
+ phys_addr_t last_addr;
- if (!size)
+ last_addr = addr + size - 1;
+ if (!size || last_addr < addr)
return NULL;
if (!static_branch_unlikely(&have_mio))
- return (void __iomem *) ioaddr;
+ return (void __iomem *) addr;
- offset = ioaddr & ~PAGE_MASK;
- ioaddr &= PAGE_MASK;
+ offset = addr & ~PAGE_MASK;
+ addr &= PAGE_MASK;
size = PAGE_ALIGN(size + offset);
area = get_vm_area(size, VM_IOREMAP);
if (!area)
return NULL;
- if (ioremap_page_range((unsigned long) area->addr,
- (unsigned long) area->addr + size,
- ioaddr, PAGE_KERNEL)) {
- vunmap(area->addr);
+ vaddr = (unsigned long) area->addr;
+ if (ioremap_page_range(vaddr, vaddr + size, addr, prot)) {
+ free_vm_area(area);
return NULL;
}
return (void __iomem *) ((unsigned long) area->addr + offset);
}
+
+void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot)
+{
+ return __ioremap(addr, size, __pgprot(prot));
+}
+EXPORT_SYMBOL(ioremap_prot);
+
+void __iomem *ioremap(phys_addr_t addr, size_t size)
+{
+ return __ioremap(addr, size, PAGE_KERNEL);
+}
EXPORT_SYMBOL(ioremap);
+void __iomem *ioremap_wc(phys_addr_t addr, size_t size)
+{
+ return __ioremap(addr, size, pgprot_writecombine(PAGE_KERNEL));
+}
+EXPORT_SYMBOL(ioremap_wc);
+
+void __iomem *ioremap_wt(phys_addr_t addr, size_t size)
+{
+ return __ioremap(addr, size, pgprot_writethrough(PAGE_KERNEL));
+}
+EXPORT_SYMBOL(ioremap_wt);
+
void iounmap(volatile void __iomem *addr)
{
if (static_branch_likely(&have_mio))
@@ -294,7 +319,7 @@
void __iomem *pci_iomap_range(struct pci_dev *pdev, int bar,
unsigned long offset, unsigned long max)
{
- if (!pci_resource_len(pdev, bar) || bar >= PCI_BAR_COUNT)
+ if (bar >= PCI_STD_NUM_BARS || !pci_resource_len(pdev, bar))
return NULL;
if (static_branch_likely(&have_mio))
@@ -324,7 +349,7 @@
void __iomem *pci_iomap_wc_range(struct pci_dev *pdev, int bar,
unsigned long offset, unsigned long max)
{
- if (!pci_resource_len(pdev, bar) || bar >= PCI_BAR_COUNT)
+ if (bar >= PCI_STD_NUM_BARS || !pci_resource_len(pdev, bar))
return NULL;
if (static_branch_likely(&have_mio))
@@ -371,29 +396,17 @@
static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
int size, u32 *val)
{
- struct zpci_dev *zdev = get_zdev_by_bus(bus);
- int ret;
+ struct zpci_dev *zdev = get_zdev_by_bus(bus, devfn);
- if (!zdev || devfn != ZPCI_DEVFN)
- ret = -ENODEV;
- else
- ret = zpci_cfg_load(zdev, where, val, size);
-
- return ret;
+ return (zdev) ? zpci_cfg_load(zdev, where, val, size) : -ENODEV;
}
static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
int size, u32 val)
{
- struct zpci_dev *zdev = get_zdev_by_bus(bus);
- int ret;
+ struct zpci_dev *zdev = get_zdev_by_bus(bus, devfn);
- if (!zdev || devfn != ZPCI_DEVFN)
- ret = -ENODEV;
- else
- ret = zpci_cfg_store(zdev, where, val, size);
-
- return ret;
+ return (zdev) ? zpci_cfg_store(zdev, where, val, size) : -ENODEV;
}
static struct pci_ops pci_root_ops = {
@@ -401,22 +414,13 @@
.write = pci_write,
};
-#ifdef CONFIG_PCI_IOV
-static struct resource iov_res = {
- .name = "PCI IOV res",
- .start = 0,
- .end = -1,
- .flags = IORESOURCE_MEM,
-};
-#endif
-
static void zpci_map_resources(struct pci_dev *pdev)
{
struct zpci_dev *zdev = to_zpci(pdev);
resource_size_t len;
int i;
- for (i = 0; i < PCI_BAR_COUNT; i++) {
+ for (i = 0; i < PCI_STD_NUM_BARS; i++) {
len = pci_resource_len(pdev, i);
if (!len)
continue;
@@ -430,16 +434,7 @@
pdev->resource[i].end = pdev->resource[i].start + len - 1;
}
-#ifdef CONFIG_PCI_IOV
- for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
- int bar = i + PCI_IOV_RESOURCES;
-
- len = pci_resource_len(pdev, bar);
- if (!len)
- continue;
- pdev->resource[bar].parent = &iov_res;
- }
-#endif
+ zpci_iov_map_resources(pdev);
}
static void zpci_unmap_resources(struct pci_dev *pdev)
@@ -451,7 +446,7 @@
if (zpci_use_mio(zdev))
return;
- for (i = 0; i < PCI_BAR_COUNT; i++) {
+ for (i = 0; i < PCI_STD_NUM_BARS; i++) {
len = pci_resource_len(pdev, i);
if (!len)
continue;
@@ -504,17 +499,17 @@
return r;
}
-static int zpci_setup_bus_resources(struct zpci_dev *zdev,
- struct list_head *resources)
+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);
+ "PCI Bus %04x:%02x", zdev->uid, ZPCI_BUS_NR);
- for (i = 0; i < PCI_BAR_COUNT; i++) {
+ for (i = 0; i < PCI_STD_NUM_BARS; i++) {
if (!zdev->bars[i].size)
continue;
entry = zpci_alloc_iomap(zdev);
@@ -551,7 +546,7 @@
{
int i;
- for (i = 0; i < PCI_BAR_COUNT; i++) {
+ for (i = 0; i < PCI_STD_NUM_BARS; i++) {
if (!zdev->bars[i].size || !zdev->bars[i].res)
continue;
@@ -563,9 +558,12 @@
int pcibios_add_device(struct pci_dev *pdev)
{
+ struct zpci_dev *zdev = to_zpci(pdev);
struct resource *res;
int i;
+ /* The pdev has a reference to the zdev via its bus */
+ zpci_zdev_get(zdev);
if (pdev->is_physfn)
pdev->no_vf_scan = 1;
@@ -573,7 +571,7 @@
pdev->dev.dma_ops = &s390_pci_dma_ops;
zpci_map_resources(pdev);
- for (i = 0; i < PCI_BAR_COUNT; i++) {
+ for (i = 0; i < PCI_STD_NUM_BARS; i++) {
res = &pdev->resource[i];
if (res->parent || !res->flags)
continue;
@@ -585,7 +583,10 @@
void pcibios_release_device(struct pci_dev *pdev)
{
+ struct zpci_dev *zdev = to_zpci(pdev);
+
zpci_unmap_resources(pdev);
+ zpci_zdev_put(zdev);
}
int pcibios_enable_device(struct pci_dev *pdev, int mask)
@@ -606,136 +607,62 @@
zpci_debug_exit_device(zdev);
}
-#ifdef CONFIG_HIBERNATE_CALLBACKS
-static int zpci_restore(struct device *dev)
+static int __zpci_register_domain(int domain)
{
- 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;
+ spin_lock(&zpci_domain_lock);
+ if (test_bit(domain, zpci_domain)) {
+ spin_unlock(&zpci_domain_lock);
+ pr_err("Domain %04x is already assigned\n", domain);
+ return -EEXIST;
+ }
+ set_bit(domain, zpci_domain);
+ spin_unlock(&zpci_domain_lock);
+ return domain;
}
-static int zpci_freeze(struct device *dev)
+static int __zpci_alloc_domain(void)
{
- struct pci_dev *pdev = to_pci_dev(dev);
- struct zpci_dev *zdev = to_zpci(pdev);
+ int domain;
- if (zdev->state != ZPCI_FN_STATE_ONLINE)
- return 0;
-
- zpci_unregister_ioat(zdev, 0);
- zpci_unmap_resources(pdev);
- return clp_disable_fh(zdev);
+ spin_lock(&zpci_domain_lock);
+ /*
+ * We can always auto allocate domains below ZPCI_NR_DEVICES.
+ * There is either a free domain or we have reached the maximum in
+ * which case we would have bailed earlier.
+ */
+ domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
+ set_bit(domain, zpci_domain);
+ spin_unlock(&zpci_domain_lock);
+ return domain;
}
-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)
+int zpci_alloc_domain(int domain)
{
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;
+ if (domain)
+ return __zpci_register_domain(domain);
+ pr_warn("UID checking was active but no UID is provided: switching to automatic domain allocation\n");
+ update_uid_checking(false);
}
-
- 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;
+ return __zpci_alloc_domain();
}
-static void zpci_free_domain(struct zpci_dev *zdev)
+void zpci_free_domain(int domain)
{
- if (zdev->domain >= ZPCI_NR_DEVICES)
- return;
-
spin_lock(&zpci_domain_lock);
- clear_bit(zdev->domain, zpci_domain);
+ clear_bit(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)
+ if (clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES)) {
+ rc = -EIO;
goto out;
+ }
rc = zpci_dma_init_device(zdev);
if (rc)
@@ -754,58 +681,175 @@
int zpci_disable_device(struct zpci_dev *zdev)
{
zpci_dma_exit_device(zdev);
- return clp_disable_fh(zdev);
+ /*
+ * The zPCI function may already be disabled by the platform, this is
+ * detected in clp_disable_fh() which becomes a no-op.
+ */
+ return clp_disable_fh(zdev) ? -EIO : 0;
}
EXPORT_SYMBOL_GPL(zpci_disable_device);
-int zpci_create_device(struct zpci_dev *zdev)
+/* zpci_remove_device - Removes the given zdev from the PCI core
+ * @zdev: the zdev to be removed from the PCI core
+ * @set_error: if true the device's error state is set to permanent failure
+ *
+ * Sets a zPCI device to a configured but offline state; the zPCI
+ * device is still accessible through its hotplug slot and the zPCI
+ * API but is removed from the common code PCI bus, making it
+ * no longer available to drivers.
+ */
+void zpci_remove_device(struct zpci_dev *zdev, bool set_error)
{
+ struct zpci_bus *zbus = zdev->zbus;
+ struct pci_dev *pdev;
+
+ if (!zdev->zbus->bus)
+ return;
+
+ pdev = pci_get_slot(zbus->bus, zdev->devfn);
+ if (pdev) {
+ if (set_error)
+ pdev->error_state = pci_channel_io_perm_failure;
+ if (pdev->is_virtfn) {
+ zpci_iov_remove_virtfn(pdev, zdev->vfn);
+ /* balance pci_get_slot */
+ pci_dev_put(pdev);
+ return;
+ }
+ pci_stop_and_remove_bus_device_locked(pdev);
+ /* balance pci_get_slot */
+ pci_dev_put(pdev);
+ }
+}
+
+/**
+ * zpci_create_device() - Create a new zpci_dev and add it to the zbus
+ * @fid: Function ID of the device to be created
+ * @fh: Current Function Handle of the device to be created
+ * @state: Initial state after creation either Standby or Configured
+ *
+ * Creates a new zpci device and adds it to its, possibly newly created, zbus
+ * as well as zpci_list.
+ *
+ * Returns: 0 on success, an error value otherwise
+ */
+int zpci_create_device(u32 fid, u32 fh, enum zpci_state state)
+{
+ struct zpci_dev *zdev;
int rc;
- rc = zpci_alloc_domain(zdev);
+ zpci_dbg(3, "add fid:%x, fh:%x, c:%d\n", fid, fh, state);
+ zdev = kzalloc(sizeof(*zdev), GFP_KERNEL);
+ if (!zdev)
+ return -ENOMEM;
+
+ /* FID and Function Handle are the static/dynamic identifiers */
+ zdev->fid = fid;
+ zdev->fh = fh;
+
+ /* Query function properties and update zdev */
+ rc = clp_query_pci_fn(zdev);
if (rc)
- goto out;
+ goto error;
+ zdev->state = state;
+
+ kref_init(&zdev->kref);
+ mutex_init(&zdev->lock);
rc = zpci_init_iommu(zdev);
if (rc)
- goto out_free;
+ goto error;
- mutex_init(&zdev->lock);
if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
rc = zpci_enable_device(zdev);
if (rc)
- goto out_destroy_iommu;
+ goto error_destroy_iommu;
}
- rc = zpci_scan_bus(zdev);
+
+ rc = zpci_bus_device_register(zdev, &pci_root_ops);
if (rc)
- goto out_disable;
+ goto error_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:
+error_disable:
if (zdev->state == ZPCI_FN_STATE_ONLINE)
zpci_disable_device(zdev);
-out_destroy_iommu:
+error_destroy_iommu:
zpci_destroy_iommu(zdev);
-out_free:
- zpci_free_domain(zdev);
-out:
+error:
+ zpci_dbg(0, "add fid:%x, rc:%d\n", fid, rc);
+ kfree(zdev);
return rc;
}
-void zpci_remove_device(struct zpci_dev *zdev)
+bool zpci_is_device_configured(struct zpci_dev *zdev)
{
- if (!zdev->bus)
- return;
+ enum zpci_state state = zdev->state;
- pci_stop_root_bus(zdev->bus);
- pci_remove_root_bus(zdev->bus);
+ return state != ZPCI_FN_STATE_RESERVED &&
+ state != ZPCI_FN_STATE_STANDBY;
+}
+
+/**
+ * zpci_device_reserved() - Mark device as resverved
+ * @zdev: the zpci_dev that was reserved
+ *
+ * Handle the case that a given zPCI function was reserved by another system.
+ * After a call to this function the zpci_dev can not be found via
+ * get_zdev_by_fid() anymore but may still be accessible via existing
+ * references though it will not be functional anymore.
+ */
+void zpci_device_reserved(struct zpci_dev *zdev)
+{
+ if (zdev->has_hp_slot)
+ zpci_exit_slot(zdev);
+ /*
+ * Remove device from zpci_list as it is going away. This also
+ * makes sure we ignore subsequent zPCI events for this device.
+ */
+ spin_lock(&zpci_list_lock);
+ list_del(&zdev->entry);
+ spin_unlock(&zpci_list_lock);
+ zdev->state = ZPCI_FN_STATE_RESERVED;
+ zpci_dbg(3, "rsv fid:%x\n", zdev->fid);
+ zpci_zdev_put(zdev);
+}
+
+void zpci_release_device(struct kref *kref)
+{
+ struct zpci_dev *zdev = container_of(kref, struct zpci_dev, kref);
+
+ if (zdev->zbus->bus)
+ zpci_remove_device(zdev, false);
+
+ switch (zdev->state) {
+ case ZPCI_FN_STATE_ONLINE:
+ case ZPCI_FN_STATE_CONFIGURED:
+ zpci_disable_device(zdev);
+ fallthrough;
+ case ZPCI_FN_STATE_STANDBY:
+ if (zdev->has_hp_slot)
+ zpci_exit_slot(zdev);
+ spin_lock(&zpci_list_lock);
+ list_del(&zdev->entry);
+ spin_unlock(&zpci_list_lock);
+ zpci_dbg(3, "rsv fid:%x\n", zdev->fid);
+ fallthrough;
+ case ZPCI_FN_STATE_RESERVED:
+ zpci_cleanup_bus_resources(zdev);
+ zpci_bus_device_unregister(zdev);
+ zpci_destroy_iommu(zdev);
+ fallthrough;
+ default:
+ break;
+ }
+ zpci_dbg(3, "rem fid:%x\n", zdev->fid);
+ kfree(zdev);
}
int zpci_report_error(struct pci_dev *pdev,
@@ -837,6 +881,9 @@
if (!zpci_iomap_bitmap)
goto error_iomap_bitmap;
+ if (static_branch_likely(&have_mio))
+ clp_setup_writeback_mio();
+
return 0;
error_iomap_bitmap:
kfree(zpci_iomap_start);
@@ -871,6 +918,10 @@
s390_pci_force_floating = 1;
return NULL;
}
+ if (!strcmp(str, "norid")) {
+ s390_pci_no_rid = 1;
+ return NULL;
+ }
return str;
}
@@ -929,9 +980,3 @@
return rc;
}
subsys_initcall_sync(pci_base_init);
-
-void zpci_rescan(void)
-{
- if (zpci_is_enabled())
- clp_rescan_pci_devices_simple(NULL);
-}