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Commit 3b67c1f3 authored by Dan Williams's avatar Dan Williams
Browse files

isci: fixup with testing from isci OROM in BIOS 



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

Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 02839a8b

drivers/scsi/isci/init.c

+5 −2
Original line number Diff line number Diff line
@@ -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);

drivers/scsi/isci/probe_roms.c

+42 −6
Original line number Diff line number Diff line
@@ -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;

		}

	}

drivers/scsi/isci/probe_roms.h

+13 −0
Original line number Diff line number Diff line
@@ -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