From 0472fbfd3250d1a33d3de78afdcbf24f78ac026b Mon Sep 17 00:00:00 2001 From: Egbert Eich Date: Tue, 9 Apr 2013 21:11:56 +0000 Subject: [PATCH] part/dev_desc: Add log2 of blocksize to block_dev_desc data struct log2 of the device block size serves as the shift value used to calculate the block number to read in file systems when implementing avaiable block sizes. It is needed quite often in file systems thus it is pre-calculated and stored in the block device descriptor. Signed-off-by: Egbert Eich --- common/cmd_ide.c | 5 +++++ common/cmd_sata.c | 1 + common/cmd_scsi.c | 4 ++++ common/usb_storage.c | 1 + drivers/block/ata_piix.c | 1 + drivers/block/pata_bfin.c | 2 ++ drivers/block/systemace.c | 1 + drivers/mmc/mmc.c | 1 + include/part.h | 5 +++++ 9 files changed, 21 insertions(+) diff --git a/common/cmd_ide.c b/common/cmd_ide.c index 0105bdbb7f..78b4aa70ba 100644 --- a/common/cmd_ide.c +++ b/common/cmd_ide.c @@ -455,6 +455,8 @@ void ide_init(void) ide_dev_desc[i].dev = i; ide_dev_desc[i].part_type = PART_TYPE_UNKNOWN; ide_dev_desc[i].blksz = 0; + ide_dev_desc[i].log2blksz = + LOG2_INVALID(typeof(ide_dev_desc[i].log2blksz)); ide_dev_desc[i].lba = 0; ide_dev_desc[i].block_read = ide_read; ide_dev_desc[i].block_write = ide_write; @@ -806,6 +808,7 @@ static void ide_ident(block_dev_desc_t *dev_desc) /* assuming HD */ dev_desc->type = DEV_TYPE_HARDDISK; dev_desc->blksz = ATA_BLOCKSIZE; + dev_desc->log2blksz = LOG2(dev_desc->blksz); dev_desc->lun = 0; /* just to fill something in... */ #if 0 /* only used to test the powersaving mode, @@ -1448,6 +1451,7 @@ static void atapi_inquiry(block_dev_desc_t *dev_desc) dev_desc->lun = 0; dev_desc->lba = 0; dev_desc->blksz = 0; + dev_desc->log2blksz = LOG2_INVALID(typeof(dev_desc->log2blksz)); dev_desc->type = iobuf[0] & 0x1f; if ((iobuf[1] & 0x80) == 0x80) @@ -1492,6 +1496,7 @@ static void atapi_inquiry(block_dev_desc_t *dev_desc) dev_desc->blksz = ((unsigned long) iobuf[4] << 24) + ((unsigned long) iobuf[5] << 16) + ((unsigned long) iobuf[6] << 8) + ((unsigned long) iobuf[7]); + dev_desc->log2blksz = LOG2(dev_desc->blksz); #ifdef CONFIG_LBA48 /* ATAPI devices cannot use 48bit addressing (ATA/ATAPI v7) */ dev_desc->lba48 = 0; diff --git a/common/cmd_sata.c b/common/cmd_sata.c index 8d57285d05..5a57a37944 100644 --- a/common/cmd_sata.c +++ b/common/cmd_sata.c @@ -44,6 +44,7 @@ int __sata_initialize(void) sata_dev_desc[i].type = DEV_TYPE_HARDDISK; sata_dev_desc[i].lba = 0; sata_dev_desc[i].blksz = 512; + sata_dev_desc[i].log2blksz = LOG2(sata_dev_desc[i].blksz); sata_dev_desc[i].block_read = sata_read; sata_dev_desc[i].block_write = sata_write; diff --git a/common/cmd_scsi.c b/common/cmd_scsi.c index 13b3d996f6..294d9f577e 100644 --- a/common/cmd_scsi.c +++ b/common/cmd_scsi.c @@ -106,6 +106,8 @@ void scsi_scan(int mode) scsi_dev_desc[i].lun=0xff; scsi_dev_desc[i].lba=0; scsi_dev_desc[i].blksz=0; + scsi_dev_desc[i].log2blksz = + LOG2_INVALID(typeof(scsi_dev_desc[i].log2blksz)); scsi_dev_desc[i].type=DEV_TYPE_UNKNOWN; scsi_dev_desc[i].vendor[0]=0; scsi_dev_desc[i].product[0]=0; @@ -166,6 +168,8 @@ void scsi_scan(int mode) } scsi_dev_desc[scsi_max_devs].lba=capacity; scsi_dev_desc[scsi_max_devs].blksz=blksz; + scsi_dev_desc[scsi_max_devs].log2blksz = + LOG2(scsi_dev_desc[scsi_max_devs].blksz); scsi_dev_desc[scsi_max_devs].type=perq; init_part(&scsi_dev_desc[scsi_max_devs]); removable: diff --git a/common/usb_storage.c b/common/usb_storage.c index fb322b4015..c5db044165 100644 --- a/common/usb_storage.c +++ b/common/usb_storage.c @@ -1430,6 +1430,7 @@ int usb_stor_get_info(struct usb_device *dev, struct us_data *ss, *capacity, *blksz); dev_desc->lba = *capacity; dev_desc->blksz = *blksz; + dev_desc->log2blksz = LOG2(dev_desc->blksz); dev_desc->type = perq; USB_STOR_PRINTF(" address %d\n", dev_desc->target); USB_STOR_PRINTF("partype: %d\n", dev_desc->part_type); diff --git a/drivers/block/ata_piix.c b/drivers/block/ata_piix.c index 1e33a66c45..fcae448508 100644 --- a/drivers/block/ata_piix.c +++ b/drivers/block/ata_piix.c @@ -406,6 +406,7 @@ void sata_identify(int num, int dev) /* assuming HD */ sata_dev_desc[devno].type = DEV_TYPE_HARDDISK; sata_dev_desc[devno].blksz = ATA_BLOCKSIZE; + sata_dev_desc[devno].log2blksz = LOG2(sata_dev_desc[devno].blksz); sata_dev_desc[devno].lun = 0; /* just to fill something in... */ } diff --git a/drivers/block/pata_bfin.c b/drivers/block/pata_bfin.c index b847dd91e7..27ecaf4f9e 100644 --- a/drivers/block/pata_bfin.c +++ b/drivers/block/pata_bfin.c @@ -897,6 +897,8 @@ static void bfin_ata_identify(struct ata_port *ap, int dev) /* assuming HD */ sata_dev_desc[ap->port_no].type = DEV_TYPE_HARDDISK; sata_dev_desc[ap->port_no].blksz = ATA_SECT_SIZE; + sata_dev_desc[ap->port_no].log2blksz = + LOG2(sata_dev_desc[ap->port_no].blksz); sata_dev_desc[ap->port_no].lun = 0; /* just to fill something in... */ printf("PATA device#%d %s is found on ata port#%d.\n", diff --git a/drivers/block/systemace.c b/drivers/block/systemace.c index bf29cbbb7a..b08715f7c4 100644 --- a/drivers/block/systemace.c +++ b/drivers/block/systemace.c @@ -127,6 +127,7 @@ block_dev_desc_t *systemace_get_dev(int dev) systemace_dev.part_type = PART_TYPE_UNKNOWN; systemace_dev.type = DEV_TYPE_HARDDISK; systemace_dev.blksz = 512; + systemace_dev.log2blksz = LOG2(systemace_dev.blksz); systemace_dev.removable = 1; systemace_dev.block_read = systemace_read; diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 23aeec1923..2590f1bcce 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1203,6 +1203,7 @@ static int mmc_startup(struct mmc *mmc) mmc->block_dev.lun = 0; mmc->block_dev.type = 0; mmc->block_dev.blksz = mmc->read_bl_len; + mmc->block_dev.log2blksz = LOG2(mmc->block_dev.blksz); mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len); sprintf(mmc->block_dev.vendor, "Man %06x Snr %04x%04x", mmc->cid[0] >> 24, (mmc->cid[2] & 0xffff), diff --git a/include/part.h b/include/part.h index 12e9b056e4..f7c7cc59fc 100644 --- a/include/part.h +++ b/include/part.h @@ -38,6 +38,7 @@ typedef struct block_dev_desc { #endif lbaint_t lba; /* number of blocks */ unsigned long blksz; /* block size */ + int log2blksz; /* for convenience: log2(blksz) */ char vendor [40+1]; /* IDE model, SCSI Vendor */ char product[20+1]; /* IDE Serial no, SCSI product */ char revision[8+1]; /* firmware revision */ @@ -58,6 +59,10 @@ typedef struct block_dev_desc { #define BLOCK_CNT(size, block_dev_desc) (PAD_COUNT(size, block_dev_desc->blksz)) #define PAD_TO_BLOCKSIZE(size, block_dev_desc) \ (PAD_SIZE(size, block_dev_desc->blksz)) +#define LOG2(x) (((x & 0xaaaaaaaa) ? 1 : 0) + ((x & 0xcccccccc) ? 2 : 0) + \ + ((x & 0xf0f0f0f0) ? 4 : 0) + ((x & 0xff00ff00) ? 8 : 0) + \ + ((x & 0xffff0000) ? 16 : 0)) +#define LOG2_INVALID(type) ((type)((sizeof(type)<<3)-1)) /* Interface types: */ #define IF_TYPE_UNKNOWN 0 -- 2.30.2