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authorLuis R. Rodriguez <mcgrof@suse.com>2015-04-21 13:46:06 -0700
committerJames Bottomley <JBottomley@Odin.com>2015-06-13 08:44:14 -0700
commit8cd1943bf0e87f467a1b498c63483f70b18b43d7 (patch)
tree79c876b8879c60ebc25b4c639dadf3a4c71a17e0 /drivers/message
parent8810eac83624ab1ad593c59da43e187179f5941e (diff)
fusion: remove dead MTRR code
If and when this gets enabled the driver could should split up IO memory space properly and that is quite a bit of work. Just remove the uncommented dead MTRR code then. There are a few motivations for this: a) Take advantage of PAT when available b) Help bury MTRR code away, MTRR is architecture specific and on x86 its replaced by PAT c) Help with the goal of eventually using _PAGE_CACHE_UC over _PAGE_CACHE_UC_MINUS on x86 on ioremap_nocache() (see commit de33c442e titled "x86 PAT: fix performance drop for glx, use UC minus for ioremap(), ioremap_nocache() and pci_mmap_page_range()") Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com> Acked-by: Sreekanth Reddy <ureekanth.reddy@avagotech.com> Signed-off-by: James Bottomley <JBottomley@Odin.com>
Diffstat (limited to 'drivers/message')
-rw-r--r--drivers/message/fusion/mptbase.c24
-rw-r--r--drivers/message/fusion/mptbase.h1
2 files changed, 0 insertions, 25 deletions
diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index 187f83629f7e..5dcc0313c38a 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -59,10 +59,6 @@
#include <linux/delay.h>
#include <linux/interrupt.h> /* needed for in_interrupt() proto */
#include <linux/dma-mapping.h>
-#include <asm/io.h>
-#ifdef CONFIG_MTRR
-#include <asm/mtrr.h>
-#endif
#include <linux/kthread.h>
#include <scsi/scsi_host.h>
@@ -2820,13 +2816,6 @@ mpt_adapter_dispose(MPT_ADAPTER *ioc)
pci_disable_device(ioc->pcidev);
pci_release_selected_regions(ioc->pcidev, ioc->bars);
-#if defined(CONFIG_MTRR) && 0
- if (ioc->mtrr_reg > 0) {
- mtrr_del(ioc->mtrr_reg, 0, 0);
- dprintk(ioc, printk(MYIOC_s_INFO_FMT "MTRR region de-registered\n", ioc->name));
- }
-#endif
-
/* Zap the adapter lookup ptr! */
list_del(&ioc->list);
@@ -4512,19 +4501,6 @@ PrimeIocFifos(MPT_ADAPTER *ioc)
ioc->req_frames_low_dma = (u32) (alloc_dma & 0xFFFFFFFF);
-#if defined(CONFIG_MTRR) && 0
- /*
- * Enable Write Combining MTRR for IOC's memory region.
- * (at least as much as we can; "size and base must be
- * multiples of 4 kiB"
- */
- ioc->mtrr_reg = mtrr_add(ioc->req_frames_dma,
- sz,
- MTRR_TYPE_WRCOMB, 1);
- dprintk(ioc, printk(MYIOC_s_DEBUG_FMT "MTRR region registered (base:size=%08x:%x)\n",
- ioc->name, ioc->req_frames_dma, sz));
-#endif
-
for (i = 0; i < ioc->req_depth; i++) {
alloc_dma += ioc->req_sz;
mem += ioc->req_sz;
diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h
index 8f14090b8b71..813d46311f6a 100644
--- a/drivers/message/fusion/mptbase.h
+++ b/drivers/message/fusion/mptbase.h
@@ -671,7 +671,6 @@ typedef struct _MPT_ADAPTER
u8 *HostPageBuffer; /* SAS - host page buffer support */
u32 HostPageBuffer_sz;
dma_addr_t HostPageBuffer_dma;
- int mtrr_reg;
struct pci_dev *pcidev; /* struct pci_dev pointer */
int bars; /* bitmask of BAR's that must be configured */
int msi_enable;

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