[PATCH v5 8/8] EDAC, pnd2: convert to use common P2SB accessor

Andy Shevchenko
2022-05-10T15:26:19Z

Since we have a common P2SB accessor in tree we may use it instead of
open coded variants.

Replace custom code by p2sb_bar() call.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Henning Schild <henning.schild@siemens.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
---
drivers/edac/Kconfig | 1 +
drivers/edac/pnd2_edac.c | 55 ++++++++++++----------------------------
2 files changed, 17 insertions(+), 39 deletions(-)

diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index d3e2477948c8..17562cf1fe97 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -263,6 +263,7 @@ config EDAC_I10NM
config EDAC_PND2
tristate "Intel Pondicherry2"
depends on PCI && X86_64 && X86_MCE_INTEL
+ select P2SB if X86
help
Support for error detection and correction on the Intel
Pondicherry2 Integrated Memory Controller. This SoC IP is
diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c
index 7d1df120e24c..a20b299f1202 100644
--- a/drivers/edac/pnd2_edac.c
+++ b/drivers/edac/pnd2_edac.c
@@ -28,6 +28,8 @@
#include <linux/bitmap.h>
#include <linux/math64.h>
#include <linux/mod_devicetable.h>
+#include <linux/platform_data/x86/p2sb.h>
+
#include <asm/cpu_device_id.h>
#include <asm/intel-family.h>
#include <asm/processor.h>
@@ -232,42 +234,14 @@ static u64 get_mem_ctrl_hub_base_addr(void)
return U64_LSHIFT(hi.base, 32) | U64_LSHIFT(lo.base, 15);
}

-static u64 get_sideband_reg_base_addr(void)
-{
- struct pci_dev *pdev;
- u32 hi, lo;
- u8 hidden;
-
- pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x19dd, NULL);
- if (pdev) {
- /* Unhide the P2SB device, if it's hidden */
- pci_read_config_byte(pdev, 0xe1, &hidden);
- if (hidden)
- pci_write_config_byte(pdev, 0xe1, 0);
-
- pci_read_config_dword(pdev, 0x10, &lo);
- pci_read_config_dword(pdev, 0x14, &hi);
- lo &= 0xfffffff0;
-
- /* Hide the P2SB device, if it was hidden before */
- if (hidden)
- pci_write_config_byte(pdev, 0xe1, hidden);
-
- pci_dev_put(pdev);
- return (U64_LSHIFT(hi, 32) | U64_LSHIFT(lo, 0));
- } else {
- return 0xfd000000;
- }
-}
-
#define DNV_MCHBAR_SIZE 0x8000
#define DNV_SB_PORT_SIZE 0x10000
static int dnv_rd_reg(int port, int off, int op, void *data, size_t sz, char *name)
{
struct pci_dev *pdev;
void __iomem *base;
- u64 addr;
- unsigned long size;
+ struct resource r;
+ int ret;

if (op == 4) {
pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x1980, NULL);
@@ -279,20 +253,23 @@ static int dnv_rd_reg(int port, int off, int op, void *data, size_t sz, char *na
} else {
/* MMIO via memory controller hub base address */
if (op == 0 && port == 0x4c) {
- addr = get_mem_ctrl_hub_base_addr();
- if (!addr)
+ memset(&r, 0, sizeof(r));
+
+ r.start = get_mem_ctrl_hub_base_addr();
+ if (!r.start)
return -ENODEV;
- size = DNV_MCHBAR_SIZE;
+ r.end = r.start + DNV_MCHBAR_SIZE - 1;
} else {
/* MMIO via sideband register base address */
- addr = get_sideband_reg_base_addr();
- if (!addr)
- return -ENODEV;
- addr += (port << 16);
- size = DNV_SB_PORT_SIZE;
+ ret = p2sb_bar(NULL, 0, &r);
+ if (ret)
+ return ret;
+
+ r.start += (port << 16);
+ r.end = r.start + DNV_SB_PORT_SIZE - 1;
}

- base = ioremap((resource_size_t)addr, size);
+ base = ioremap(r.start, resource_size(&r));
if (!base)
return -ENODEV;

--
2.35.1