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isci: Fixup for OEM parameter EFI variable retrieval

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Updating the EFI variable OEM parameter retrieval after examining the EFI
variable exported via sysfs.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dave Jiang 2011-03-11 14:04:43 -08:00 committed by Dan Williams
parent 3b67c1f376
commit 2e8320f751
2 changed files with 59 additions and 11 deletions
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68
drivers/scsi/isci/probe_roms.c
View File

@ -61,6 +61,11 @@ struct isci_orom *isci_request_oprom(struct pci_dev *pdev)
len = pci_biosrom_size(pdev);
rom = devm_kzalloc(&pdev->dev, sizeof(*rom), GFP_KERNEL);
if (!rom) {
dev_warn(&pdev->dev,
"Unable to allocate memory for orom\n");
return NULL;
}
for (i = 0; i < len && rom; i += ISCI_OEM_SIG_SIZE) {
memcpy_fromio(oem_sig, oprom + i, ISCI_OEM_SIG_SIZE);
@ -181,7 +186,11 @@ struct isci_orom *isci_get_efi_var(struct pci_dev *pdev)
{
struct efi_variable *evar;
efi_status_t status;
struct isci_orom *orom = NULL;
struct isci_orom *rom = NULL;
struct isci_oem_hdr *oem_hdr;
u8 *tmp, sum;
int j;
size_t copy_len;
evar = devm_kzalloc(&pdev->dev,
sizeof(struct efi_variable),
@ -192,6 +201,16 @@ struct isci_orom *isci_get_efi_var(struct pci_dev *pdev)
return NULL;
}
rom = devm_kzalloc(&pdev->dev, sizeof(*rom), GFP_KERNEL);
if (!rom) {
dev_warn(&pdev->dev,
"Unable to allocate memory for orom\n");
return NULL;
}
for (j = 0; j < strlen(ISCI_EFI_VAR_NAME) + 1; j++)
evar->VariableName[j] = ISCI_EFI_VAR_NAME[j];
evar->DataSize = 1024;
evar->VendorGuid = ISCI_EFI_VENDOR_GUID;
evar->Attributes = ISCI_EFI_ATTRIBUTES;
@ -205,19 +224,48 @@ struct isci_orom *isci_get_efi_var(struct pci_dev *pdev)
else
status = EFI_NOT_FOUND;
if (status == EFI_SUCCESS)
orom = (struct isci_orom *)evar->Data;
else
if (status != EFI_SUCCESS) {
dev_warn(&pdev->dev,
"Unable to obtain EFI variable for OEM parms\n");
return NULL;
}
if (orom && memcmp(orom->hdr.signature, ISCI_ROM_SIG,
strlen(ISCI_ROM_SIG)) != 0)
oem_hdr = (struct isci_oem_hdr *)evar->Data;
if (memcmp(oem_hdr->sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) != 0) {
dev_warn(&pdev->dev,
"Verifying OROM signature failed\n");
"Invalid OEM header signature\n");
return NULL;
}
if (!orom)
devm_kfree(&pdev->dev, evar);
/* calculate checksum */
tmp = (u8 *)oem_hdr;
for (j = 0, sum = 0; j < sizeof(oem_hdr); j++, tmp++)
sum += *tmp;
return orom;
tmp = (u8 *)rom;
for (j = 0; j < sizeof(*rom); j++, tmp++)
sum += *tmp;
if (sum != 0) {
dev_warn(&pdev->dev,
"OEM table checksum failed\n");
return NULL;
}
copy_len = min(evar->DataSize,
min(oem_hdr->len - sizeof(*oem_hdr),
sizeof(*rom)));
memcpy(rom, (char *)evar->Data + sizeof(*oem_hdr), copy_len);
if (memcmp(rom->hdr.signature,
ISCI_ROM_SIG,
ISCI_ROM_SIG_SIZE) != 0) {
dev_warn(&pdev->dev,
"Invalid OEM table signature\n");
return NULL;
}
return rom;
}

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

@ -100,7 +100,7 @@ struct isci_oem_hdr {
EFI_GUID(0x193dfefa, 0xa445, 0x4302, 0x99, 0xd8, 0xef, 0x3a, 0xad, \
0x1a, 0x04, 0xc6)
#define ISCI_EFI_ATTRIBUTES 0
#define ISCI_EFI_VAR_NAME "RST_SCU_OEM"
#define ISCI_EFI_VAR_NAME "RstScuO"
/* Allowed PORT configuration modes APC Automatic PORT configuration mode is
* defined by the OEM configuration parameters providing no PHY_MASK parameters