Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * sd_dif.c - SCSI Data Integrity Field
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2007, 2008 Oracle Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Written by: Martin K. Petersen <martin.petersen@oracle.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/t10-pi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <scsi/scsi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <scsi/scsi_cmnd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <scsi/scsi_dbg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <scsi/scsi_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <scsi/scsi_driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <scsi/scsi_eh.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <scsi/scsi_host.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <scsi/scsi_ioctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <scsi/scsicam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "sd.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)  * Configure exchange of protection information between OS and HBA.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) void sd_dif_config_host(struct scsi_disk *sdkp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	struct scsi_device *sdp = sdkp->device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	struct gendisk *disk = sdkp->disk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	u8 type = sdkp->protection_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	struct blk_integrity bi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	int dif, dix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	dif = scsi_host_dif_capable(sdp->host, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	dix = scsi_host_dix_capable(sdp->host, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	if (!dix && scsi_host_dix_capable(sdp->host, 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		dif = 0; dix = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	if (!dix)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	memset(&bi, 0, sizeof(bi));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	/* Enable DMA of protection information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	if (scsi_host_get_guard(sdkp->device->host) & SHOST_DIX_GUARD_IP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		if (type == T10_PI_TYPE3_PROTECTION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 			bi.profile = &t10_pi_type3_ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 			bi.profile = &t10_pi_type1_ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		bi.flags |= BLK_INTEGRITY_IP_CHECKSUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 		if (type == T10_PI_TYPE3_PROTECTION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 			bi.profile = &t10_pi_type3_crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 			bi.profile = &t10_pi_type1_crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	bi.tuple_size = sizeof(struct t10_pi_tuple);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	sd_printk(KERN_NOTICE, sdkp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 		  "Enabling DIX %s protection\n", bi.profile->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	if (dif && type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 		bi.flags |= BLK_INTEGRITY_DEVICE_CAPABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 		if (!sdkp->ATO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 		if (type == T10_PI_TYPE3_PROTECTION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 			bi.tag_size = sizeof(u16) + sizeof(u32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 			bi.tag_size = sizeof(u16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 		sd_printk(KERN_NOTICE, sdkp, "DIF application tag size %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 			  bi.tag_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 	blk_integrity_register(disk, &bi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)