Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 9f6f392..c7fea9b 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -24,11 +24,9 @@
#include <linux/err.h>
#include <linux/export.h>
#include <linux/delay.h>
-#include <linux/irq.h>
-#include <linux/kernel_stat.h>
#include <linux/seq_file.h>
+#include <linux/jump_label.h>
#include <linux/pci.h>
-#include <linux/msi.h>
#include <asm/isc.h>
#include <asm/airq.h>
@@ -37,30 +35,13 @@
#include <asm/pci_clp.h>
#include <asm/pci_dma.h>
-#define DEBUG /* enable pr_debug */
-
-#define SIC_IRQ_MODE_ALL 0
-#define SIC_IRQ_MODE_SINGLE 1
-
-#define ZPCI_NR_DMA_SPACES 1
-#define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS
-
/* list of all detected zpci devices */
static LIST_HEAD(zpci_list);
static DEFINE_SPINLOCK(zpci_list_lock);
-static struct irq_chip zpci_irq_chip = {
- .name = "zPCI",
- .irq_unmask = pci_msi_unmask_irq,
- .irq_mask = pci_msi_mask_irq,
-};
-
static DECLARE_BITMAP(zpci_domain, ZPCI_NR_DEVICES);
static DEFINE_SPINLOCK(zpci_domain_lock);
-static struct airq_iv *zpci_aisb_iv;
-static struct airq_iv *zpci_aibv[ZPCI_NR_DEVICES];
-
#define ZPCI_IOMAP_ENTRIES \
min(((unsigned long) ZPCI_NR_DEVICES * PCI_BAR_COUNT / 2), \
ZPCI_IOMAP_MAX_ENTRIES)
@@ -70,6 +51,8 @@
struct zpci_iomap_entry *zpci_iomap_start;
EXPORT_SYMBOL_GPL(zpci_iomap_start);
+DEFINE_STATIC_KEY_FALSE(have_mio);
+
static struct kmem_cache *zdev_fmb_cache;
struct zpci_dev *get_zdev_by_fid(u32 fid)
@@ -123,39 +106,6 @@
}
EXPORT_SYMBOL_GPL(pci_proc_domain);
-/* Modify PCI: Register adapter interruptions */
-static int zpci_set_airq(struct zpci_dev *zdev)
-{
- u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_REG_INT);
- struct zpci_fib fib = {0};
- u8 status;
-
- fib.isc = PCI_ISC;
- fib.sum = 1; /* enable summary notifications */
- fib.noi = airq_iv_end(zdev->aibv);
- fib.aibv = (unsigned long) zdev->aibv->vector;
- fib.aibvo = 0; /* each zdev has its own interrupt vector */
- fib.aisb = (unsigned long) zpci_aisb_iv->vector + (zdev->aisb/64)*8;
- fib.aisbo = zdev->aisb & 63;
-
- return zpci_mod_fc(req, &fib, &status) ? -EIO : 0;
-}
-
-/* Modify PCI: Unregister adapter interruptions */
-static int zpci_clear_airq(struct zpci_dev *zdev)
-{
- u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_DEREG_INT);
- struct zpci_fib fib = {0};
- u8 cc, status;
-
- cc = zpci_mod_fc(req, &fib, &status);
- if (cc == 3 || (cc == 1 && status == 24))
- /* Function already gone or IRQs already deregistered. */
- cc = 0;
-
- return cc ? -EIO : 0;
-}
-
/* Modify PCI: Register I/O address translation parameters */
int zpci_register_ioat(struct zpci_dev *zdev, u8 dmaas,
u64 base, u64 limit, u64 iota)
@@ -241,7 +191,7 @@
u64 data;
int rc;
- rc = zpci_load(&data, req, offset);
+ rc = __zpci_load(&data, req, offset);
if (!rc) {
data = le64_to_cpu((__force __le64) data);
data >>= (8 - len) * 8;
@@ -259,7 +209,7 @@
data <<= (8 - len) * 8;
data = (__force u64) cpu_to_le64(data);
- rc = zpci_store(data, req, offset);
+ rc = __zpci_store(data, req, offset);
return rc;
}
@@ -276,18 +226,48 @@
zpci_memcpy_toio(to, from, count);
}
+void __iomem *ioremap(unsigned long ioaddr, unsigned long size)
+{
+ struct vm_struct *area;
+ unsigned long offset;
+
+ if (!size)
+ return NULL;
+
+ if (!static_branch_unlikely(&have_mio))
+ return (void __iomem *) ioaddr;
+
+ offset = ioaddr & ~PAGE_MASK;
+ ioaddr &= 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);
+ return NULL;
+ }
+ return (void __iomem *) ((unsigned long) area->addr + offset);
+}
+EXPORT_SYMBOL(ioremap);
+
+void iounmap(volatile void __iomem *addr)
+{
+ if (static_branch_likely(&have_mio))
+ vunmap((__force void *) ((unsigned long) addr & PAGE_MASK));
+}
+EXPORT_SYMBOL(iounmap);
+
/* Create a virtual mapping cookie for a PCI BAR */
-void __iomem *pci_iomap_range(struct pci_dev *pdev,
- int bar,
- unsigned long offset,
- unsigned long max)
+static void __iomem *pci_iomap_range_fh(struct pci_dev *pdev, int bar,
+ unsigned long offset, unsigned long max)
{
struct zpci_dev *zdev = to_zpci(pdev);
int idx;
- if (!pci_resource_len(pdev, bar))
- return NULL;
-
idx = zdev->bars[bar].map_idx;
spin_lock(&zpci_iomap_lock);
/* Detect overrun */
@@ -298,6 +278,30 @@
return (void __iomem *) ZPCI_ADDR(idx) + offset;
}
+
+static void __iomem *pci_iomap_range_mio(struct pci_dev *pdev, int bar,
+ unsigned long offset,
+ unsigned long max)
+{
+ unsigned long barsize = pci_resource_len(pdev, bar);
+ struct zpci_dev *zdev = to_zpci(pdev);
+ void __iomem *iova;
+
+ iova = ioremap((unsigned long) zdev->bars[bar].mio_wt, barsize);
+ return iova ? iova + offset : iova;
+}
+
+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)
+ return NULL;
+
+ if (static_branch_likely(&have_mio))
+ return pci_iomap_range_mio(pdev, bar, offset, max);
+ else
+ return pci_iomap_range_fh(pdev, bar, offset, max);
+}
EXPORT_SYMBOL(pci_iomap_range);
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
@@ -306,7 +310,37 @@
}
EXPORT_SYMBOL(pci_iomap);
-void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
+static void __iomem *pci_iomap_wc_range_mio(struct pci_dev *pdev, int bar,
+ unsigned long offset, unsigned long max)
+{
+ unsigned long barsize = pci_resource_len(pdev, bar);
+ struct zpci_dev *zdev = to_zpci(pdev);
+ void __iomem *iova;
+
+ iova = ioremap((unsigned long) zdev->bars[bar].mio_wb, barsize);
+ return iova ? iova + offset : iova;
+}
+
+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)
+ return NULL;
+
+ if (static_branch_likely(&have_mio))
+ return pci_iomap_wc_range_mio(pdev, bar, offset, max);
+ else
+ return pci_iomap_range_fh(pdev, bar, offset, max);
+}
+EXPORT_SYMBOL(pci_iomap_wc_range);
+
+void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long maxlen)
+{
+ return pci_iomap_wc_range(dev, bar, 0, maxlen);
+}
+EXPORT_SYMBOL(pci_iomap_wc);
+
+static void pci_iounmap_fh(struct pci_dev *pdev, void __iomem *addr)
{
unsigned int idx = ZPCI_IDX(addr);
@@ -319,6 +353,19 @@
}
spin_unlock(&zpci_iomap_lock);
}
+
+static void pci_iounmap_mio(struct pci_dev *pdev, void __iomem *addr)
+{
+ iounmap(addr);
+}
+
+void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
+{
+ if (static_branch_likely(&have_mio))
+ pci_iounmap_mio(pdev, addr);
+ else
+ pci_iounmap_fh(pdev, addr);
+}
EXPORT_SYMBOL(pci_iounmap);
static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
@@ -354,138 +401,18 @@
.write = pci_write,
};
-static void zpci_irq_handler(struct airq_struct *airq)
-{
- unsigned long si, ai;
- struct airq_iv *aibv;
- int irqs_on = 0;
-
- inc_irq_stat(IRQIO_PCI);
- for (si = 0;;) {
- /* Scan adapter summary indicator bit vector */
- si = airq_iv_scan(zpci_aisb_iv, si, airq_iv_end(zpci_aisb_iv));
- if (si == -1UL) {
- if (irqs_on++)
- /* End of second scan with interrupts on. */
- break;
- /* First scan complete, reenable interrupts. */
- if (zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC))
- break;
- si = 0;
- continue;
- }
-
- /* Scan the adapter interrupt vector for this device. */
- aibv = zpci_aibv[si];
- for (ai = 0;;) {
- ai = airq_iv_scan(aibv, ai, airq_iv_end(aibv));
- if (ai == -1UL)
- break;
- inc_irq_stat(IRQIO_MSI);
- airq_iv_lock(aibv, ai);
- generic_handle_irq(airq_iv_get_data(aibv, ai));
- airq_iv_unlock(aibv, ai);
- }
- }
-}
-
-int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
-{
- struct zpci_dev *zdev = to_zpci(pdev);
- unsigned int hwirq, msi_vecs;
- unsigned long aisb;
- struct msi_desc *msi;
- struct msi_msg msg;
- int rc, irq;
-
- zdev->aisb = -1UL;
- if (type == PCI_CAP_ID_MSI && nvec > 1)
- return 1;
- msi_vecs = min_t(unsigned int, nvec, zdev->max_msi);
-
- /* Allocate adapter summary indicator bit */
- aisb = airq_iv_alloc_bit(zpci_aisb_iv);
- if (aisb == -1UL)
- return -EIO;
- zdev->aisb = aisb;
-
- /* Create adapter interrupt vector */
- zdev->aibv = airq_iv_create(msi_vecs, AIRQ_IV_DATA | AIRQ_IV_BITLOCK);
- if (!zdev->aibv)
- return -ENOMEM;
-
- /* Wire up shortcut pointer */
- zpci_aibv[aisb] = zdev->aibv;
-
- /* Request MSI interrupts */
- hwirq = 0;
- for_each_pci_msi_entry(msi, pdev) {
- if (hwirq >= msi_vecs)
- break;
- irq = irq_alloc_desc(0); /* Alloc irq on node 0 */
- if (irq < 0)
- return -ENOMEM;
- rc = irq_set_msi_desc(irq, msi);
- if (rc)
- return rc;
- irq_set_chip_and_handler(irq, &zpci_irq_chip,
- handle_simple_irq);
- msg.data = hwirq;
- msg.address_lo = zdev->msi_addr & 0xffffffff;
- msg.address_hi = zdev->msi_addr >> 32;
- pci_write_msi_msg(irq, &msg);
- airq_iv_set_data(zdev->aibv, hwirq, irq);
- hwirq++;
- }
-
- /* Enable adapter interrupts */
- rc = zpci_set_airq(zdev);
- if (rc)
- return rc;
-
- return (msi_vecs == nvec) ? 0 : msi_vecs;
-}
-
-void arch_teardown_msi_irqs(struct pci_dev *pdev)
-{
- struct zpci_dev *zdev = to_zpci(pdev);
- struct msi_desc *msi;
- int rc;
-
- /* Disable adapter interrupts */
- rc = zpci_clear_airq(zdev);
- if (rc)
- return;
-
- /* Release MSI interrupts */
- for_each_pci_msi_entry(msi, pdev) {
- if (!msi->irq)
- continue;
- if (msi->msi_attrib.is_msix)
- __pci_msix_desc_mask_irq(msi, 1);
- else
- __pci_msi_desc_mask_irq(msi, 1, 1);
- irq_set_msi_desc(msi->irq, NULL);
- irq_free_desc(msi->irq);
- msi->msg.address_lo = 0;
- msi->msg.address_hi = 0;
- msi->msg.data = 0;
- msi->irq = 0;
- }
-
- if (zdev->aisb != -1UL) {
- zpci_aibv[zdev->aisb] = NULL;
- airq_iv_free_bit(zpci_aisb_iv, zdev->aisb);
- zdev->aisb = -1UL;
- }
- if (zdev->aibv) {
- airq_iv_release(zdev->aibv);
- zdev->aibv = NULL;
- }
-}
+#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;
@@ -493,61 +420,46 @@
len = pci_resource_len(pdev, i);
if (!len)
continue;
- pdev->resource[i].start =
- (resource_size_t __force) pci_iomap(pdev, i, 0);
+
+ if (zpci_use_mio(zdev))
+ pdev->resource[i].start =
+ (resource_size_t __force) zdev->bars[i].mio_wb;
+ else
+ pdev->resource[i].start = (resource_size_t __force)
+ pci_iomap_range_fh(pdev, i, 0, 0);
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
}
static void zpci_unmap_resources(struct pci_dev *pdev)
{
+ struct zpci_dev *zdev = to_zpci(pdev);
resource_size_t len;
int i;
+ if (zpci_use_mio(zdev))
+ return;
+
for (i = 0; i < PCI_BAR_COUNT; i++) {
len = pci_resource_len(pdev, i);
if (!len)
continue;
- pci_iounmap(pdev, (void __iomem __force *)
- pdev->resource[i].start);
+ pci_iounmap_fh(pdev, (void __iomem __force *)
+ pdev->resource[i].start);
}
}
-static struct airq_struct zpci_airq = {
- .handler = zpci_irq_handler,
- .isc = PCI_ISC,
-};
-
-static int __init zpci_irq_init(void)
-{
- int rc;
-
- rc = register_adapter_interrupt(&zpci_airq);
- if (rc)
- goto out;
- /* Set summary to 1 to be called every time for the ISC. */
- *zpci_airq.lsi_ptr = 1;
-
- rc = -ENOMEM;
- zpci_aisb_iv = airq_iv_create(ZPCI_NR_DEVICES, AIRQ_IV_ALLOC);
- if (!zpci_aisb_iv)
- goto out_airq;
-
- zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
- return 0;
-
-out_airq:
- unregister_adapter_interrupt(&zpci_airq);
-out:
- return rc;
-}
-
-static void zpci_irq_exit(void)
-{
- airq_iv_release(zpci_aisb_iv);
- unregister_adapter_interrupt(&zpci_airq);
-}
-
static int zpci_alloc_iomap(struct zpci_dev *zdev)
{
unsigned long entry;
@@ -617,7 +529,10 @@
if (zdev->bars[i].val & 4)
flags |= IORESOURCE_MEM_64;
- addr = ZPCI_ADDR(entry);
+ 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);
@@ -651,6 +566,9 @@
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);
@@ -935,7 +853,9 @@
kmem_cache_destroy(zdev_fmb_cache);
}
-static unsigned int s390_pci_probe = 1;
+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)
@@ -944,6 +864,14 @@
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;
}
@@ -962,6 +890,11 @@
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;