From ba6983a745fa292c36a93cac18abaf3f316f70d1 Mon Sep 17 00:00:00 2001 From: Jitendra Bhivare Date: Fri, 24 Mar 2017 14:11:46 +0530 Subject: [PATCH] scsi: be2iscsi: Remove free_list for ASYNC handles With previous patch adding ASYNC Rx buffers to free_list is not required. Remove all free_list related operations. Add in_use to track if buffer posted is being processed by driver and purge all buffers received for connection if found so. Signed-off-by: Jitendra Bhivare Reviewed-by: Tomas Henzl Reviewed-by: Chris Leech Signed-off-by: Martin K. Petersen --- drivers/scsi/be2iscsi/be_main.c | 99 +++++++++++++++++------------------------ drivers/scsi/be2iscsi/be_main.h | 8 +--- 2 files changed, 43 insertions(+), 64 deletions(-) diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c index 1cd9c2d..ee1f1c4 100644 --- a/drivers/scsi/be2iscsi/be_main.c +++ b/drivers/scsi/be2iscsi/be_main.c @@ -1453,15 +1453,28 @@ static inline void beiscsi_hdl_put_handle(struct hd_async_context *pasync_ctx, struct hd_async_handle *pasync_handle) { - if (pasync_handle->is_header) { - list_add_tail(&pasync_handle->link, - &pasync_ctx->async_header.free_list); - pasync_ctx->async_header.free_entries++; - } else { - list_add_tail(&pasync_handle->link, - &pasync_ctx->async_data.free_list); - pasync_ctx->async_data.free_entries++; - } + pasync_handle->is_final = 0; + pasync_handle->buffer_len = 0; + pasync_handle->in_use = 0; + list_del_init(&pasync_handle->link); +} + +static void +beiscsi_hdl_purge_handles(struct beiscsi_hba *phba, + struct hd_async_context *pasync_ctx, + u16 cri) +{ + struct hd_async_handle *pasync_handle, *tmp_handle; + struct list_head *plist; + + plist = &pasync_ctx->async_entry[cri].wq.list; + list_for_each_entry_safe(pasync_handle, tmp_handle, plist, link) + beiscsi_hdl_put_handle(pasync_ctx, pasync_handle); + + INIT_LIST_HEAD(&pasync_ctx->async_entry[cri].wq.list); + pasync_ctx->async_entry[cri].wq.hdr_len = 0; + pasync_ctx->async_entry[cri].wq.bytes_received = 0; + pasync_ctx->async_entry[cri].wq.bytes_needed = 0; } static struct hd_async_handle * @@ -1473,11 +1486,12 @@ beiscsi_hdl_get_handle(struct beiscsi_conn *beiscsi_conn, struct beiscsi_hba *phba = beiscsi_conn->phba; struct hd_async_handle *pasync_handle; struct be_bus_address phys_addr; + u16 cid, code, ci, cri; u8 final, error = 0; - u16 cid, code, ci; u32 dpl; cid = beiscsi_conn->beiscsi_conn_cid; + cri = BE_GET_ASYNC_CRI_FROM_CID(cid); /** * This function is invoked to get the right async_handle structure * from a given DEF PDU CQ entry. @@ -1525,15 +1539,7 @@ beiscsi_hdl_get_handle(struct beiscsi_conn *beiscsi_conn, break; /* called only for above codes */ default: - pasync_handle = NULL; - break; - } - - if (!pasync_handle) { - beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_ISCSI, - "BM_%d : cid %d async PDU handle not found - code %d ci %d addr %llx\n", - cid, code, ci, phys_addr.u.a64.address); - return pasync_handle; + return NULL; } if (pasync_handle->pa.u.a64.address != phys_addr.u.a64.address || @@ -1549,44 +1555,33 @@ beiscsi_hdl_get_handle(struct beiscsi_conn *beiscsi_conn, /* FW has stale address - attempt continuing by dropping */ } - list_del_init(&pasync_handle->link); - /** - * Each CID is associated with unique CRI. - * ASYNC_CRI_FROM_CID mapping and CRI_FROM_CID are totaly different. - **/ - pasync_handle->cri = BE_GET_ASYNC_CRI_FROM_CID(cid); - pasync_handle->is_final = final; - pasync_handle->buffer_len = dpl; - /** * DEF PDU header and data buffers with errors should be simply * dropped as there are no consumers for it. */ if (error) { beiscsi_hdl_put_handle(pasync_ctx, pasync_handle); - pasync_handle = NULL; + return NULL; } - return pasync_handle; -} - -static void -beiscsi_hdl_purge_handles(struct beiscsi_hba *phba, - struct hd_async_context *pasync_ctx, - u16 cri) -{ - struct hd_async_handle *pasync_handle, *tmp_handle; - struct list_head *plist; - plist = &pasync_ctx->async_entry[cri].wq.list; - list_for_each_entry_safe(pasync_handle, tmp_handle, plist, link) { - list_del(&pasync_handle->link); - beiscsi_hdl_put_handle(pasync_ctx, pasync_handle); + if (pasync_handle->in_use || !list_empty(&pasync_handle->link)) { + beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_ISCSI, + "BM_%d : cid %d async PDU handle in use - code %d ci %d addr %llx\n", + cid, code, ci, phys_addr.u.a64.address); + beiscsi_hdl_purge_handles(phba, pasync_ctx, cri); } - INIT_LIST_HEAD(&pasync_ctx->async_entry[cri].wq.list); - pasync_ctx->async_entry[cri].wq.hdr_len = 0; - pasync_ctx->async_entry[cri].wq.bytes_received = 0; - pasync_ctx->async_entry[cri].wq.bytes_needed = 0; + list_del_init(&pasync_handle->link); + /** + * Each CID is associated with unique CRI. + * ASYNC_CRI_FROM_CID mapping and CRI_FROM_CID are totaly different. + **/ + pasync_handle->cri = cri; + pasync_handle->is_final = final; + pasync_handle->buffer_len = dpl; + pasync_handle->in_use = 1; + + return pasync_handle; } static unsigned int @@ -2795,7 +2790,6 @@ static int hwi_init_async_pdu_ctx(struct beiscsi_hba *phba) pasync_ctx->async_header.handle_base = mem_descr->mem_array[0].virtual_address; - INIT_LIST_HEAD(&pasync_ctx->async_header.free_list); /* setup data buffer sgls */ mem_descr = (struct be_mem_descriptor *)phba->init_mem; @@ -2829,7 +2823,6 @@ static int hwi_init_async_pdu_ctx(struct beiscsi_hba *phba) pasync_ctx->async_data.handle_base = mem_descr->mem_array[0].virtual_address; - INIT_LIST_HEAD(&pasync_ctx->async_data.free_list); pasync_header_h = (struct hd_async_handle *) @@ -2884,13 +2877,9 @@ static int hwi_init_async_pdu_ctx(struct beiscsi_hba *phba) pasync_ctx->async_header.pa_base.u.a64. address + (p->defpdu_hdr_sz * index); - list_add_tail(&pasync_header_h->link, - &pasync_ctx->async_header. - free_list); pasync_ctx->async_entry[index].header = pasync_header_h; pasync_header_h++; - pasync_ctx->async_header.free_entries++; INIT_LIST_HEAD(&pasync_ctx->async_entry[index]. wq.list); @@ -2926,13 +2915,9 @@ static int hwi_init_async_pdu_ctx(struct beiscsi_hba *phba) num_per_mem++; num_async_data--; - list_add_tail(&pasync_data_h->link, - &pasync_ctx->async_data. - free_list); pasync_ctx->async_entry[index].data = pasync_data_h; pasync_data_h++; - pasync_ctx->async_data.free_entries++; } } } diff --git a/drivers/scsi/be2iscsi/be_main.h b/drivers/scsi/be2iscsi/be_main.h index cebacac..9883a85 100644 --- a/drivers/scsi/be2iscsi/be_main.h +++ b/drivers/scsi/be2iscsi/be_main.h @@ -596,6 +596,7 @@ struct hd_async_handle { u16 cri; u8 is_header; u8 is_final; + u8 in_use; }; #define BEISCSI_ASYNC_HDQ_SIZE(phba, ulp) \ @@ -626,14 +627,7 @@ struct hd_async_buf_context { void *va_base; void *ring_base; struct hd_async_handle *handle_base; - u16 free_entries; u32 buffer_size; - /** - * Once iSCSI layer finishes processing an async PDU, the - * handles used for the PDU are added to this list. - * They are posted back to FW in groups of 8. - */ - struct list_head free_list; u16 pi; }; -- 2.7.4