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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Browse Source 
Pull s390 updates from Martin Schwidefsky:
 "Mostly cleanups and bug-fixes, with two exceptions.

  The first is lazy flushing of I/O-TLBs for PCI to improve performance,
  the second is software dirty bits in the pmd for the madvise-free
  implementation"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (24 commits)
  s390/locking: Reenable optimistic spinning
  s390/mm: implement dirty bits for large segment table entries
  KVM: s390/mm: Fix page table locking vs. split pmd lock
  s390/dasd: fix camel case
  s390/3215: fix hanging console issue
  s390/irq: improve displayed interrupt order in /proc/interrupts
  s390/seccomp: fix error return for filtered system calls
  s390/pci: introduce lazy IOTLB flushing for DMA unmap
  dasd: fix error recovery for alias devices during format
  dasd: fix list_del corruption during format
  dasd: fix unresponsive device during format
  dasd: use aliases for formatted devices during format
  s390/pci: fix kmsg component
  s390/kdump: Return NOTIFY_OK for all actions other than MEM_GOING_OFFLINE
  s390/watchdog: Fix module name in Kconfig help text
  s390/dasd: replace seq_printf by seq_puts
  s390/dasd: replace pr_warning by pr_warn
  s390/dasd: Move EXPORT_SYMBOL after function/variable
  s390/dasd: remove unnecessary null test before debugfs_remove
  s390/zfcp: use qdio buffer helpers
  ...
This commit is contained in:
Linus Torvalds
2014-08-07 08:41:00 -07:00
parent 33caee3992 36e7fdaa1a
commit ebb067d2f4
26 changed files with 618 additions and 442 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/s390/scsi/zfcp_qdio.c
View File

@@ -14,27 +14,10 @@
#include "zfcp_ext.h"
#include "zfcp_qdio.h"
#define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer))
static bool enable_multibuffer = 1;
module_param_named(datarouter, enable_multibuffer, bool, 0400);
MODULE_PARM_DESC(datarouter, "Enable hardware data router support (default on)");
static int zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbal)
{
int pos;
for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos += QBUFF_PER_PAGE) {
sbal[pos] = (struct qdio_buffer *) get_zeroed_page(GFP_KERNEL);
if (!sbal[pos])
return -ENOMEM;
}
for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos++)
if (pos % QBUFF_PER_PAGE)
sbal[pos] = sbal[pos - 1] + 1;
return 0;
}
static void zfcp_qdio_handler_error(struct zfcp_qdio *qdio, char *id,
unsigned int qdio_err)
{
@@ -326,15 +309,30 @@ static void zfcp_qdio_setup_init_data(struct qdio_initialize *id,
static int zfcp_qdio_allocate(struct zfcp_qdio *qdio)
{
struct qdio_initialize init_data;
int ret;
if (zfcp_qdio_buffers_enqueue(qdio->req_q) ||
zfcp_qdio_buffers_enqueue(qdio->res_q))
ret = qdio_alloc_buffers(qdio->req_q, QDIO_MAX_BUFFERS_PER_Q);
if (ret)
return -ENOMEM;
ret = qdio_alloc_buffers(qdio->res_q, QDIO_MAX_BUFFERS_PER_Q);
if (ret)
goto free_req_q;
zfcp_qdio_setup_init_data(&init_data, qdio);
init_waitqueue_head(&qdio->req_q_wq);
return qdio_allocate(&init_data);
ret = qdio_allocate(&init_data);
if (ret)
goto free_res_q;
return 0;
free_res_q:
qdio_free_buffers(qdio->res_q, QDIO_MAX_BUFFERS_PER_Q);
free_req_q:
qdio_free_buffers(qdio->req_q, QDIO_MAX_BUFFERS_PER_Q);
return ret;
}
/**
@@ -448,19 +446,14 @@ failed_establish:
void zfcp_qdio_destroy(struct zfcp_qdio *qdio)
{
int p;
if (!qdio)
return;
if (qdio->adapter->ccw_device)
qdio_free(qdio->adapter->ccw_device);
for (p = 0; p < QDIO_MAX_BUFFERS_PER_Q; p += QBUFF_PER_PAGE) {
free_page((unsigned long) qdio->req_q[p]);
free_page((unsigned long) qdio->res_q[p]);
}
qdio_free_buffers(qdio->req_q, QDIO_MAX_BUFFERS_PER_Q);
qdio_free_buffers(qdio->res_q, QDIO_MAX_BUFFERS_PER_Q);
kfree(qdio);
}
@@ -475,7 +468,7 @@ int zfcp_qdio_setup(struct zfcp_adapter *adapter)
qdio->adapter = adapter;
if (zfcp_qdio_allocate(qdio)) {
zfcp_qdio_destroy(qdio);
kfree(qdio);
return -ENOMEM;
}