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authorLinus Torvalds <torvalds@linux-foundation.org>2015-04-20 10:15:33 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-20 10:15:33 -0700
commitb19a42e3cb9e73cad59e60ab7403e5afe7f4b262 (patch)
tree5b8ebea37f8d655abdfcab89647e118686dc29e8 /arch/s390/pci
parent5ca08a82a75c9109f8207cbcbef8705334b4713a (diff)
parent80ed156a3d12819a8c839f40f5b6996c4aa117a5 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull more s390 updates from Martin Schwidefsky: "The big thing in this second merge for s390 is the new eBPF JIT from Michael which replaces the old 32-bit backend. The remaining commits are bug fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/pci: add locking for fmb access s390/pci: extract software counters from fmb s390/dasd: Fix unresumed device after suspend/resume having no paths s390/dasd: fix unresumed device after suspend/resume s390/dasd: fix inability to set a DASD device offline s390/mm: Fix memory hotplug for unaligned standby memory s390/bpf: Add s390x eBPF JIT compiler backend s390: Use bool function return values of true/false not 1/0
Diffstat (limited to 'arch/s390/pci')
-rw-r--r--arch/s390/pci/pci.c6
-rw-r--r--arch/s390/pci/pci_debug.c33
-rw-r--r--arch/s390/pci/pci_dma.c8
3 files changed, 32 insertions, 15 deletions
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 98336200c7b2..598f023cf8a6 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -190,6 +190,11 @@ int zpci_fmb_enable_device(struct zpci_dev *zdev)
return -ENOMEM;
WARN_ON((u64) zdev->fmb & 0xf);
+ /* reset software counters */
+ atomic64_set(&zdev->allocated_pages, 0);
+ atomic64_set(&zdev->mapped_pages, 0);
+ atomic64_set(&zdev->unmapped_pages, 0);
+
args.fmb_addr = virt_to_phys(zdev->fmb);
return mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
}
@@ -822,6 +827,7 @@ int zpci_create_device(struct zpci_dev *zdev)
if (rc)
goto out;
+ mutex_init(&zdev->lock);
if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
rc = zpci_enable_device(zdev);
if (rc)
diff --git a/arch/s390/pci/pci_debug.c b/arch/s390/pci/pci_debug.c
index c22d4402ae45..4129b0a5fd78 100644
--- a/arch/s390/pci/pci_debug.c
+++ b/arch/s390/pci/pci_debug.c
@@ -31,12 +31,25 @@ static char *pci_perf_names[] = {
"Refresh operations",
"DMA read bytes",
"DMA write bytes",
- /* software counters */
+};
+
+static char *pci_sw_names[] = {
"Allocated pages",
"Mapped pages",
"Unmapped pages",
};
+static void pci_sw_counter_show(struct seq_file *m)
+{
+ struct zpci_dev *zdev = m->private;
+ atomic64_t *counter = &zdev->allocated_pages;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(pci_sw_names); i++, counter++)
+ seq_printf(m, "%26s:\t%llu\n", pci_sw_names[i],
+ atomic64_read(counter));
+}
+
static int pci_perf_show(struct seq_file *m, void *v)
{
struct zpci_dev *zdev = m->private;
@@ -45,7 +58,10 @@ static int pci_perf_show(struct seq_file *m, void *v)
if (!zdev)
return 0;
+
+ mutex_lock(&zdev->lock);
if (!zdev->fmb) {
+ mutex_unlock(&zdev->lock);
seq_puts(m, "FMB statistics disabled\n");
return 0;
}
@@ -65,12 +81,9 @@ static int pci_perf_show(struct seq_file *m, void *v)
for (i = 4; i < 6; i++)
seq_printf(m, "%26s:\t%llu\n",
pci_perf_names[i], *(stat + i));
- /* software counters */
- for (i = 6; i < ARRAY_SIZE(pci_perf_names); i++)
- seq_printf(m, "%26s:\t%llu\n",
- pci_perf_names[i],
- atomic64_read((atomic64_t *) (stat + i)));
+ pci_sw_counter_show(m);
+ mutex_unlock(&zdev->lock);
return 0;
}
@@ -88,19 +101,17 @@ static ssize_t pci_perf_seq_write(struct file *file, const char __user *ubuf,
if (rc)
return rc;
+ mutex_lock(&zdev->lock);
switch (val) {
case 0:
rc = zpci_fmb_disable_device(zdev);
- if (rc)
- return rc;
break;
case 1:
rc = zpci_fmb_enable_device(zdev);
- if (rc)
- return rc;
break;
}
- return count;
+ mutex_unlock(&zdev->lock);
+ return rc ? rc : count;
}
static int pci_perf_seq_open(struct inode *inode, struct file *filp)
diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c
index 4cbb29a4d615..6fd8d5836138 100644
--- a/arch/s390/pci/pci_dma.c
+++ b/arch/s390/pci/pci_dma.c
@@ -300,7 +300,7 @@ static dma_addr_t s390_dma_map_pages(struct device *dev, struct page *page,
flags |= ZPCI_TABLE_PROTECTED;
if (!dma_update_trans(zdev, pa, dma_addr, size, flags)) {
- atomic64_add(nr_pages, &zdev->fmb->mapped_pages);
+ atomic64_add(nr_pages, &zdev->mapped_pages);
return dma_addr + (offset & ~PAGE_MASK);
}
@@ -328,7 +328,7 @@ static void s390_dma_unmap_pages(struct device *dev, dma_addr_t dma_addr,
zpci_err_hex(&dma_addr, sizeof(dma_addr));
}
- atomic64_add(npages, &zdev->fmb->unmapped_pages);
+ atomic64_add(npages, &zdev->unmapped_pages);
iommu_page_index = (dma_addr - zdev->start_dma) >> PAGE_SHIFT;
dma_free_iommu(zdev, iommu_page_index, npages);
}
@@ -357,7 +357,7 @@ static void *s390_dma_alloc(struct device *dev, size_t size,
return NULL;
}
- atomic64_add(size / PAGE_SIZE, &zdev->fmb->allocated_pages);
+ atomic64_add(size / PAGE_SIZE, &zdev->allocated_pages);
if (dma_handle)
*dma_handle = map;
return (void *) pa;
@@ -370,7 +370,7 @@ static void s390_dma_free(struct device *dev, size_t size,
struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
size = PAGE_ALIGN(size);
- atomic64_sub(size / PAGE_SIZE, &zdev->fmb->allocated_pages);
+ atomic64_sub(size / PAGE_SIZE, &zdev->allocated_pages);
s390_dma_unmap_pages(dev, dma_handle, size, DMA_BIDIRECTIONAL, NULL);
free_pages((unsigned long) pa, get_order(size));
}