From 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae Mon Sep 17 00:00:00 2001 From: Joe Carnuccio Date: Wed, 22 Aug 2012 14:20:56 -0400 Subject: [PATCH] [SCSI] qla2xxx: Add I2C BSG interface. Add BSG interface to generically access I2C attached devices. Signed-off-by: Joe Carnuccio Signed-off-by: Chad Dupuis Signed-off-by: James Bottomley --- drivers/scsi/qla2xxx/qla_bsg.c | 96 ++++++++++++++++++++++++++++++++++++++++++ drivers/scsi/qla2xxx/qla_bsg.h | 10 +++++ 2 files changed, 106 insertions(+) diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c index c688838..462ac70 100644 --- a/drivers/scsi/qla2xxx/qla_bsg.c +++ b/drivers/scsi/qla2xxx/qla_bsg.c @@ -1560,6 +1560,96 @@ done: } 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) { switch (bsg_job->request->rqst_data.h_vendor.vendor_cmd[0]) { @@ -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); diff --git a/drivers/scsi/qla2xxx/qla_bsg.h b/drivers/scsi/qla2xxx/qla_bsg.h index 70caa63..1a0ab37 100644 --- a/drivers/scsi/qla2xxx/qla_bsg.h +++ b/drivers/scsi/qla2xxx/qla_bsg.h @@ -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 -- 2.7.4