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isci: Adding EFI variable skeletal support

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Adding EFI variable retrieving for OEM parameters. Still need GUID and
variable name.

Also updated the data struct for oem parameters and hex file for firmware

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
[fix CONFIG_EFI=n compile error]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dave Jiang 2011-02-23 00:02:24 -08:00 committed by Dan Williams
parent d044af17aa
commit 8db37aabac
3 changed files with 68 additions and 5 deletions
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7
drivers/scsi/isci/init.c
View File

@ -474,10 +474,9 @@ static int __devinit isci_pci_probe(struct pci_dev *pdev, const struct pci_devic
return -ENOMEM;
pci_set_drvdata(pdev, pci_info);
if (efi_enabled) {
/* do EFI parsing here */
orom = NULL;
} else
if (efi_enabled)
orom = isci_get_efi_var(pdev);
else
orom = isci_request_oprom(pdev);
if (!orom) {

64
drivers/scsi/isci/probe_roms.c
View File

@ -27,6 +27,7 @@
#include <linux/kernel.h>
#include <linux/firmware.h>
#include <linux/uaccess.h>
#include <linux/efi.h>
#include <asm/probe_roms.h>
#include "isci.h"
@ -36,6 +37,15 @@
#include "sci_environment.h"
#include "probe_roms.h"
struct efi_variable {
efi_char16_t VariableName[1024/sizeof(efi_char16_t)];
efi_guid_t VendorGuid;
unsigned long DataSize;
__u8 Data[1024];
efi_status_t Status;
__u32 Attributes;
} __attribute__((packed));
struct isci_orom *isci_request_oprom(struct pci_dev *pdev)
{
void __iomem *oprom = pci_map_biosrom(pdev);
@ -131,3 +141,57 @@ struct isci_orom *isci_request_firmware(struct pci_dev *pdev, const struct firmw
return orom;
}
static struct efi *get_efi(void)
{
#ifdef CONFIG_EFI
return &efi;
#else
return NULL;
#endif
}
struct isci_orom *isci_get_efi_var(struct pci_dev *pdev)
{
struct efi_variable *evar;
efi_status_t status;
struct isci_orom *orom = NULL;
evar = devm_kzalloc(&pdev->dev,
sizeof(struct efi_variable),
GFP_KERNEL);
if (!evar) {
dev_warn(&pdev->dev,
"Unable to allocate memory for EFI var\n");
return NULL;
}
evar->DataSize = 1024;
evar->VendorGuid = ISCI_EFI_VENDOR_GUID;
evar->Attributes = ISCI_EFI_ATTRIBUTES;
if (get_efi())
status = get_efi()->get_variable(evar->VariableName,
&evar->VendorGuid,
&evar->Attributes,
&evar->DataSize,
evar->Data);
else
status = EFI_NOT_FOUND;
if (status == EFI_SUCCESS)
orom = (struct isci_orom *)evar->Data;
else
dev_warn(&pdev->dev,
"Unable to obtain EFI variable for OEM parms\n");
if (orom && memcmp(orom->hdr.signature, ISCI_ROM_SIG,
strlen(ISCI_ROM_SIG)) != 0)
dev_warn(&pdev->dev,
"Verifying OROM signature failed\n");
if (!orom)
devm_kfree(&pdev->dev, evar);
return orom;
}

2
drivers/scsi/isci/probe_roms.h
View File

@ -69,7 +69,7 @@ enum sci_status isci_parse_oem_parameters(
struct isci_orom *orom,
int scu_index);
struct isci_orom *isci_request_firmware(struct pci_dev *pdev, const struct firmware *fw);
int isci_get_efi_var(struct pci_dev *pdev);
struct isci_orom *isci_get_efi_var(struct pci_dev *pdev);
#else
#define SCI_MAX_PORTS 4
#define SCI_MAX_PHYS 4