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[SCSI] qla2xxx: Add I2C BSG interface.

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Add BSG interface to generically access I2C attached devices.

Signed-off-by: Joe Carnuccio <joe.carnuccio@qlogic.com>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Joe Carnuccio 2012-08-22 14:20:56 -04:00 committed by James Bottomley
parent 650f528f35
commit 9ebb5d9c69
2 changed files with 106 additions and 0 deletions
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96
drivers/scsi/qla2xxx/qla_bsg.c
View File

@ -1559,6 +1559,96 @@ done:
return 0;
}
static int
qla2x00_write_i2c(struct fc_bsg_job *bsg_job)
{
struct Scsi_Host *host = bsg_job->shost;
scsi_qla_host_t *vha = shost_priv(host);
struct qla_hw_data *ha = vha->hw;
int rval = 0;
uint8_t bsg[DMA_POOL_SIZE];
struct qla_i2c_access *i2c = (void *)bsg;
dma_addr_t sfp_dma;
uint8_t *sfp = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL, &sfp_dma);
if (!sfp) {
bsg_job->reply->reply_data.vendor_reply.vendor_rsp[0] =
EXT_STATUS_NO_MEMORY;
goto done;
}
sg_copy_to_buffer(bsg_job->request_payload.sg_list,
bsg_job->request_payload.sg_cnt, i2c, sizeof(*i2c));
memcpy(sfp, i2c->buffer, i2c->length);
rval = qla2x00_write_sfp(vha, sfp_dma, sfp,
i2c->device, i2c->offset, i2c->length, i2c->option);
if (rval) {
bsg_job->reply->reply_data.vendor_reply.vendor_rsp[0] =
EXT_STATUS_MAILBOX;
goto dealloc;
}
bsg_job->reply->reply_data.vendor_reply.vendor_rsp[0] = 0;
dealloc:
dma_pool_free(ha->s_dma_pool, sfp, sfp_dma);
done:
bsg_job->reply_len = sizeof(struct fc_bsg_reply);
bsg_job->reply->result = DID_OK << 16;
bsg_job->job_done(bsg_job);
return 0;
}
static int
qla2x00_read_i2c(struct fc_bsg_job *bsg_job)
{
struct Scsi_Host *host = bsg_job->shost;
scsi_qla_host_t *vha = shost_priv(host);
struct qla_hw_data *ha = vha->hw;
int rval = 0;
uint8_t bsg[DMA_POOL_SIZE];
struct qla_i2c_access *i2c = (void *)bsg;
dma_addr_t sfp_dma;
uint8_t *sfp = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL, &sfp_dma);
if (!sfp) {
bsg_job->reply->reply_data.vendor_reply.vendor_rsp[0] =
EXT_STATUS_NO_MEMORY;
goto done;
}
sg_copy_to_buffer(bsg_job->request_payload.sg_list,
bsg_job->request_payload.sg_cnt, i2c, sizeof(*i2c));
rval = qla2x00_read_sfp(vha, sfp_dma, sfp,
i2c->device, i2c->offset, i2c->length, i2c->option);
if (rval) {
bsg_job->reply->reply_data.vendor_reply.vendor_rsp[0] =
EXT_STATUS_MAILBOX;
goto dealloc;
}
memcpy(i2c->buffer, sfp, i2c->length);
sg_copy_from_buffer(bsg_job->reply_payload.sg_list,
bsg_job->reply_payload.sg_cnt, i2c, sizeof(*i2c));
bsg_job->reply->reply_data.vendor_reply.vendor_rsp[0] = 0;
dealloc:
dma_pool_free(ha->s_dma_pool, sfp, sfp_dma);
done:
bsg_job->reply_len = sizeof(struct fc_bsg_reply);
bsg_job->reply->reply_payload_rcv_len = sizeof(*i2c);
bsg_job->reply->result = DID_OK << 16;
bsg_job->job_done(bsg_job);
return 0;
}
static int
qla2x00_process_vendor_specific(struct fc_bsg_job *bsg_job)
{
@ -1596,6 +1686,12 @@ qla2x00_process_vendor_specific(struct fc_bsg_job *bsg_job)
case QL_VND_WRITE_FRU_STATUS:
return qla2x00_write_fru_status(bsg_job);
case QL_VND_WRITE_I2C:
return qla2x00_write_i2c(bsg_job);
case QL_VND_READ_I2C:
return qla2x00_read_i2c(bsg_job);
default:
bsg_job->reply->result = (DID_ERROR << 16);
bsg_job->job_done(bsg_job);

10
drivers/scsi/qla2xxx/qla_bsg.h
View File

@ -19,6 +19,8 @@
#define QL_VND_SET_FRU_VERSION 0x0B
#define QL_VND_READ_FRU_STATUS 0x0C
#define QL_VND_WRITE_FRU_STATUS 0x0D
#define QL_VND_WRITE_I2C 0x10
#define QL_VND_READ_I2C 0x11
/* BSG Vendor specific subcode returns */
#define EXT_STATUS_OK 0
@ -183,4 +185,12 @@ struct qla_status_reg {
uint8_t reserved[7];
} __packed;
struct qla_i2c_access {
uint16_t device;
uint16_t offset;
uint16_t option;
uint16_t length;
uint8_t buffer[0x40];
} __packed;
#endif