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isci: fixup with testing from isci OROM in BIOS

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Added fixups for the OROM parsing code after testing with BIOS OROM

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2011-03-08 09:53:51 -08:00
parent 02839a8b51
commit 3b67c1f376
3 changed files with 60 additions and 8 deletions
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7
drivers/scsi/isci/init.c
View File

@ -495,8 +495,11 @@ static int __devinit isci_pci_probe(struct pci_dev *pdev, const struct pci_devic
}
if (orom)
dev_info(&pdev->dev, "sas parameters (version: %#x) loaded\n",
orom->hdr.version);
dev_info(&pdev->dev,
"OEM SAS parameters (version: %u.%u) loaded\n",
(orom->hdr.version & 0xf0) >> 4,
(orom->hdr.version & 0xf));
pci_info->orom = orom;
err = isci_pci_init(pdev);

48
drivers/scsi/isci/probe_roms.c
View File

@ -51,6 +51,10 @@ struct isci_orom *isci_request_oprom(struct pci_dev *pdev)
void __iomem *oprom = pci_map_biosrom(pdev);
struct isci_orom *rom = NULL;
size_t len, i;
int j;
char oem_sig[4];
struct isci_oem_hdr oem_hdr;
u8 *tmp, sum;
if (!oprom)
return NULL;
@ -58,13 +62,45 @@ struct isci_orom *isci_request_oprom(struct pci_dev *pdev)
len = pci_biosrom_size(pdev);
rom = devm_kzalloc(&pdev->dev, sizeof(*rom), GFP_KERNEL);
for (i = 0; i < len && rom; i += ISCI_ROM_SIG_SIZE) {
memcpy_fromio(rom->hdr.signature, oprom + i, ISCI_ROM_SIG_SIZE);
if (memcmp(rom->hdr.signature, ISCI_ROM_SIG,
ISCI_ROM_SIG_SIZE) == 0) {
size_t copy_len = min(len - i, sizeof(*rom));
for (i = 0; i < len && rom; i += ISCI_OEM_SIG_SIZE) {
memcpy_fromio(oem_sig, oprom + i, ISCI_OEM_SIG_SIZE);
memcpy_fromio(rom, oprom + i, copy_len);
/* we think we found the OEM table */
if (memcmp(oem_sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) == 0) {
size_t copy_len;
memcpy_fromio(&oem_hdr, oprom + i, sizeof(oem_hdr));
copy_len = min(oem_hdr.len - sizeof(oem_hdr),
sizeof(*rom));
memcpy_fromio(rom,
oprom + i + sizeof(oem_hdr),
copy_len);
/* calculate checksum */
tmp = (u8 *)&oem_hdr;
for (j = 0, sum = 0; j < sizeof(oem_hdr); j++, tmp++)
sum += *tmp;
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");
continue;
}
/* keep going if that's not the oem param table */
if (memcmp(rom->hdr.signature,
ISCI_ROM_SIG,
ISCI_ROM_SIG_SIZE) != 0)
continue;
dev_info(&pdev->dev,
"OEM parameter table found in OROM\n");
break;
}
}

13
drivers/scsi/isci/probe_roms.h
View File

@ -70,6 +70,17 @@ enum sci_status isci_parse_oem_parameters(
int scu_index);
struct isci_orom *isci_request_firmware(struct pci_dev *pdev, const struct firmware *fw);
struct isci_orom *isci_get_efi_var(struct pci_dev *pdev);
struct isci_oem_hdr {
u8 sig[4];
u8 rev_major;
u8 rev_minor;
u16 len;
u8 checksum;
u8 reserved1;
u16 reserved2;
} __attribute__ ((packed));
#else
#define SCI_MAX_PORTS 4
#define SCI_MAX_PHYS 4
@ -80,6 +91,8 @@ struct isci_orom *isci_get_efi_var(struct pci_dev *pdev);
#define ROMSIGNATURE 0xaa55
#define ISCI_OEM_SIG "$OEM"
#define ISCI_OEM_SIG_SIZE 4
#define ISCI_ROM_SIG "ISCUOEMB"
#define ISCI_ROM_SIG_SIZE 8