diff options
| -rw-r--r-- | drivers/scsi/advansys.c | 105 |
1 files changed, 79 insertions, 26 deletions
diff --git a/drivers/scsi/advansys.c b/drivers/scsi/advansys.c index d35897e..88e7fef 100644 --- a/drivers/scsi/advansys.c +++ b/drivers/scsi/advansys.c @@ -90,17 +90,6 @@ #define ASC_DCNT __u32 /* Unsigned Data count type. */ #define ASC_SDCNT __s32 /* Signed Data count type. */ -/* - * These macros are used to convert a virtual address to a - * 32-bit value. This currently can be used on Linux Alpha - * which uses 64-bit virtual address but a 32-bit bus address. - * This is likely to break in the future, but doing this now - * will give us time to change the HW and FW to handle 64-bit - * addresses. - */ -#define ASC_VADDR_TO_U32 virt_to_bus -#define ASC_U32_TO_VADDR bus_to_virt - typedef unsigned char uchar; #ifndef TRUE @@ -601,6 +590,8 @@ typedef struct asc_dvc_var { uchar min_sdtr_index; uchar max_sdtr_index; struct asc_board *drv_ptr; + int ptr_map_count; + void **ptr_map; ASC_DCNT uc_break; } ASC_DVC_VAR; @@ -2748,6 +2739,59 @@ static void asc_prt_adv_scsi_req_q(ADV_SCSI_REQ_Q *q) #endif /* ADVANSYS_DEBUG */ /* + * The advansys chip/microcode contains a 32-bit identifier for each command + * known as the 'srb'. I don't know what it stands for. The driver used + * to encode the scsi_cmnd pointer by calling virt_to_bus and retrieve it + * with bus_to_virt. Now the driver keeps a per-host map of integers to + * pointers. It auto-expands when full, unless it can't allocate memory. + * Note that an srb of 0 is treated specially by the chip/firmware, hence + * the return of i+1 in this routine, and the corresponding subtraction in + * the inverse routine. + */ +#define BAD_SRB 0 +static u32 advansys_ptr_to_srb(struct asc_dvc_var *asc_dvc, void *ptr) +{ + int i; + void **new_ptr; + + for (i = 0; i < asc_dvc->ptr_map_count; i++) { + if (!asc_dvc->ptr_map[i]) + goto out; + } + + if (asc_dvc->ptr_map_count == 0) + asc_dvc->ptr_map_count = 1; + else + asc_dvc->ptr_map_count *= 2; + + new_ptr = krealloc(asc_dvc->ptr_map, + asc_dvc->ptr_map_count * sizeof(void *), GFP_ATOMIC); + if (!new_ptr) + return BAD_SRB; + asc_dvc->ptr_map = new_ptr; + out: + ASC_DBG(3, "Putting ptr %p into array offset %d\n", ptr, i); + asc_dvc->ptr_map[i] = ptr; + return i + 1; +} + +static void * advansys_srb_to_ptr(struct asc_dvc_var *asc_dvc, u32 srb) +{ + void *ptr; + + srb--; + if (srb >= asc_dvc->ptr_map_count) { + printk("advansys: bad SRB %u, max %u\n", srb, + asc_dvc->ptr_map_count); + return NULL; + } + ptr = asc_dvc->ptr_map[srb]; + asc_dvc->ptr_map[srb] = NULL; + ASC_DBG(3, "Returning ptr %p from array offset %d\n", ptr, srb); + return ptr; +} + +/* * advansys_info() * * Return suitable for printing on the console with the argument @@ -9075,17 +9119,10 @@ static void asc_isr_callback(ASC_DVC_VAR *asc_dvc_varp, ASC_QDONE_INFO *qdonep) ASC_DBG(1, "asc_dvc_varp 0x%p, qdonep 0x%p\n", asc_dvc_varp, qdonep); ASC_DBG_PRT_ASC_QDONE_INFO(2, qdonep); - /* - * Get the struct scsi_cmnd structure and Scsi_Host structure for the - * command that has been completed. - */ - scp = (struct scsi_cmnd *)ASC_U32_TO_VADDR(qdonep->d2.srb_ptr); - ASC_DBG(1, "scp 0x%p\n", scp); - - if (scp == NULL) { - ASC_PRINT("asc_isr_callback: scp is NULL\n"); + scp = advansys_srb_to_ptr(asc_dvc_varp, qdonep->d2.srb_ptr); + if (!scp) return; - } + ASC_DBG_PRT_CDB(2, scp->cmnd, scp->cmd_len); shost = scp->device->host; @@ -9095,6 +9132,8 @@ static void asc_isr_callback(ASC_DVC_VAR *asc_dvc_varp, ASC_QDONE_INFO *qdonep) boardp = shost_priv(shost); BUG_ON(asc_dvc_varp != &boardp->dvc_var.asc_dvc_var); + dma_unmap_single(boardp->dev, scp->SCp.dma_handle, + sizeof(scp->sense_buffer), DMA_FROM_DEVICE); /* * 'qdonep' contains the command's ending status. */ @@ -9835,9 +9874,20 @@ static int advansys_slave_configure(struct scsi_device *sdev) return 0; } +static __le32 advansys_get_sense_buffer_dma(struct scsi_cmnd *scp) +{ + struct asc_board *board = shost_priv(scp->device->host); + scp->SCp.dma_handle = dma_map_single(board->dev, scp->sense_buffer, + sizeof(scp->sense_buffer), DMA_FROM_DEVICE); + dma_cache_sync(board->dev, scp->sense_buffer, + sizeof(scp->sense_buffer), DMA_FROM_DEVICE); + return cpu_to_le32(scp->SCp.dma_handle); +} + static int asc_build_req(struct asc_board *boardp, struct scsi_cmnd *scp, struct asc_scsi_q *asc_scsi_q) { + struct asc_dvc_var *asc_dvc = &boardp->dvc_var.asc_dvc_var; int use_sg; memset(asc_scsi_q, 0, sizeof(*asc_scsi_q)); @@ -9845,7 +9895,11 @@ static int asc_build_req(struct asc_board *boardp, struct scsi_cmnd *scp, /* * Point the ASC_SCSI_Q to the 'struct scsi_cmnd'. */ - asc_scsi_q->q2.srb_ptr = ASC_VADDR_TO_U32(scp); + asc_scsi_q->q2.srb_ptr = advansys_ptr_to_srb(asc_dvc, scp); + if (asc_scsi_q->q2.srb_ptr == BAD_SRB) { + scp->result = HOST_BYTE(DID_SOFT_ERROR); + return ASC_ERROR; + } /* * Build the ASC_SCSI_Q request. @@ -9856,8 +9910,7 @@ static int asc_build_req(struct asc_board *boardp, struct scsi_cmnd *scp, asc_scsi_q->q1.target_lun = scp->device->lun; asc_scsi_q->q2.target_ix = ASC_TIDLUN_TO_IX(scp->device->id, scp->device->lun); - asc_scsi_q->q1.sense_addr = - cpu_to_le32(virt_to_bus(&scp->sense_buffer[0])); + asc_scsi_q->q1.sense_addr = advansys_get_sense_buffer_dma(scp); asc_scsi_q->q1.sense_len = sizeof(scp->sense_buffer); /* @@ -9871,7 +9924,7 @@ static int asc_build_req(struct asc_board *boardp, struct scsi_cmnd *scp, * started request. * */ - if ((boardp->dvc_var.asc_dvc_var.cur_dvc_qng[scp->device->id] > 0) && + if ((asc_dvc->cur_dvc_qng[scp->device->id] > 0) && (boardp->reqcnt[scp->device->id] % 255) == 0) { asc_scsi_q->q2.tag_code = MSG_ORDERED_TAG; } else { @@ -10091,7 +10144,7 @@ adv_build_req(struct asc_board *boardp, struct scsi_cmnd *scp, /* * Set the ADV_SCSI_REQ_Q 'srb_ptr' to point to the adv_req_t structure. */ - scsiqp->srb_ptr = ASC_VADDR_TO_U32(reqp); + scsiqp->srb_ptr = ADV_VADDR_TO_U32(reqp); /* * Set the adv_req_t 'cmndp' to point to the struct scsi_cmnd structure. |