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s390/pci: extract software counters from fmb 

The software counters are not a part of the function measurement
block. Also we do not check for zdev->fmb != NULL when using these
counters (function measurement can be toggled at runtime). Just move
the software counters to struct zpci_dev.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2015-04-10 14:33:08 +02:00 committed by Martin Schwidefsky
parent df3044f1ef
commit 6001018ae8
4 changed files with 28 additions and 14 deletions
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8
arch/s390/include/asm/pci.h
View File

@ -44,10 +44,6 @@ struct zpci_fmb {
u64 rpcit_ops;
u64 dma_rbytes;
u64 dma_wbytes;
/* software counters */
atomic64_t allocated_pages;
atomic64_t mapped_pages;
atomic64_t unmapped_pages;
} __packed __aligned(16);
enum zpci_state {
@ -111,6 +107,10 @@ struct zpci_dev {
/* Function measurement block */
struct zpci_fmb *fmb;
u16 fmb_update; /* update interval */
/* software counters */
atomic64_t allocated_pages;
atomic64_t mapped_pages;
atomic64_t unmapped_pages;
enum pci_bus_speed max_bus_speed;

5
arch/s390/pci/pci.c
View File

@ -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);
}

21
arch/s390/pci/pci_debug.c
View File

@ -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;
@ -63,12 +76,8 @@ 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);
return 0;
}

8
arch/s390/pci/pci_dma.c
View File

@ -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));
}