[SCSI] bfa: Brocade BFA FC SCSI driver

Add new driver for Brocade Hardware

Signed-off-by: Jing Huang <huangj@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 345 insertions, 0 deletions

diff --git a/drivers/scsi/bfa/bfa_uf.c b/drivers/scsi/bfa/bfa_uf.c
new file mode 100644
index 000000000000..ff5f9deb1b22
--- /dev/null
+++ b/drivers/scsi/bfa/bfa_uf.c
@@ -0,0 +1,345 @@
+/*
+ * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
+ * All rights reserved
+ * www.brocade.com
+ *
+ * Linux driver for Brocade Fibre Channel Host Bus Adapter.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License (GPL) Version 2 as
+ * published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+/**
+ *  bfa_uf.c BFA unsolicited frame receive implementation
+ */
+
+#include <bfa.h>
+#include <bfa_svc.h>
+#include <bfi/bfi_uf.h>
+#include <cs/bfa_debug.h>
+
+BFA_TRC_FILE(HAL, UF);
+BFA_MODULE(uf);
+
+/*
+ *****************************************************************************
+ * Internal functions
+ *****************************************************************************
+ */
+static void
+__bfa_cb_uf_recv(void *cbarg, bfa_boolean_t complete)
+{
+	struct bfa_uf_s   *uf = cbarg;
+	struct bfa_uf_mod_s *ufm = BFA_UF_MOD(uf->bfa);
+
+	if (complete)
+		ufm->ufrecv(ufm->cbarg, uf);
+}
+
+static void
+claim_uf_pbs(struct bfa_uf_mod_s *ufm, struct bfa_meminfo_s *mi)
+{
+	u32        uf_pb_tot_sz;
+
+	ufm->uf_pbs_kva = (struct bfa_uf_buf_s *) bfa_meminfo_dma_virt(mi);
+	ufm->uf_pbs_pa = bfa_meminfo_dma_phys(mi);
+	uf_pb_tot_sz = BFA_ROUNDUP((sizeof(struct bfa_uf_buf_s) * ufm->num_ufs),
+							BFA_DMA_ALIGN_SZ);
+
+	bfa_meminfo_dma_virt(mi) += uf_pb_tot_sz;
+	bfa_meminfo_dma_phys(mi) += uf_pb_tot_sz;
+
+	bfa_os_memset((void *)ufm->uf_pbs_kva, 0, uf_pb_tot_sz);
+}
+
+static void
+claim_uf_post_msgs(struct bfa_uf_mod_s *ufm, struct bfa_meminfo_s *mi)
+{
+	struct bfi_uf_buf_post_s *uf_bp_msg;
+	struct bfi_sge_s      *sge;
+	union bfi_addr_u      sga_zero = { {0} };
+	u16        i;
+	u16        buf_len;
+
+	ufm->uf_buf_posts = (struct bfi_uf_buf_post_s *) bfa_meminfo_kva(mi);
+	uf_bp_msg = ufm->uf_buf_posts;
+
+	for (i = 0, uf_bp_msg = ufm->uf_buf_posts; i < ufm->num_ufs;
+	     i++, uf_bp_msg++) {
+		bfa_os_memset(uf_bp_msg, 0, sizeof(struct bfi_uf_buf_post_s));
+
+		uf_bp_msg->buf_tag = i;
+		buf_len = sizeof(struct bfa_uf_buf_s);
+		uf_bp_msg->buf_len = bfa_os_htons(buf_len);
+		bfi_h2i_set(uf_bp_msg->mh, BFI_MC_UF, BFI_UF_H2I_BUF_POST,
+			    bfa_lpuid(ufm->bfa));
+
+		sge = uf_bp_msg->sge;
+		sge[0].sg_len = buf_len;
+		sge[0].flags = BFI_SGE_DATA_LAST;
+		bfa_dma_addr_set(sge[0].sga, ufm_pbs_pa(ufm, i));
+		bfa_sge_to_be(sge);
+
+		sge[1].sg_len = buf_len;
+		sge[1].flags = BFI_SGE_PGDLEN;
+		sge[1].sga = sga_zero;
+		bfa_sge_to_be(&sge[1]);
+	}
+
+	/**
+	 * advance pointer beyond consumed memory
+	 */
+	bfa_meminfo_kva(mi) = (u8 *) uf_bp_msg;
+}
+
+static void
+claim_ufs(struct bfa_uf_mod_s *ufm, struct bfa_meminfo_s *mi)
+{
+	u16        i;
+	struct bfa_uf_s   *uf;
+
+	/*
+	 * Claim block of memory for UF list
+	 */
+	ufm->uf_list = (struct bfa_uf_s *) bfa_meminfo_kva(mi);
+
+	/*
+	 * Initialize UFs and queue it in UF free queue
+	 */
+	for (i = 0, uf = ufm->uf_list; i < ufm->num_ufs; i++, uf++) {
+		bfa_os_memset(uf, 0, sizeof(struct bfa_uf_s));
+		uf->bfa = ufm->bfa;
+		uf->uf_tag = i;
+		uf->pb_len = sizeof(struct bfa_uf_buf_s);
+		uf->buf_kva = (void *)&ufm->uf_pbs_kva[i];
+		uf->buf_pa = ufm_pbs_pa(ufm, i);
+		list_add_tail(&uf->qe, &ufm->uf_free_q);
+	}
+
+	/**
+	 * advance memory pointer
+	 */
+	bfa_meminfo_kva(mi) = (u8 *) uf;
+}
+
+static void
+uf_mem_claim(struct bfa_uf_mod_s *ufm, struct bfa_meminfo_s *mi)
+{
+	claim_uf_pbs(ufm, mi);
+	claim_ufs(ufm, mi);
+	claim_uf_post_msgs(ufm, mi);
+}
+
+static void
+bfa_uf_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *ndm_len, u32 *dm_len)
+{
+	u32        num_ufs = cfg->fwcfg.num_uf_bufs;
+
+	/*
+	 * dma-able memory for UF posted bufs
+	 */
+	*dm_len += BFA_ROUNDUP((sizeof(struct bfa_uf_buf_s) * num_ufs),
+							BFA_DMA_ALIGN_SZ);
+
+	/*
+	 * kernel Virtual memory for UFs and UF buf post msg copies
+	 */
+	*ndm_len += sizeof(struct bfa_uf_s) * num_ufs;
+	*ndm_len += sizeof(struct bfi_uf_buf_post_s) * num_ufs;
+}
+
+static void
+bfa_uf_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
+		  struct bfa_meminfo_s *meminfo, struct bfa_pcidev_s *pcidev)
+{
+	struct bfa_uf_mod_s *ufm = BFA_UF_MOD(bfa);
+
+	bfa_os_memset(ufm, 0, sizeof(struct bfa_uf_mod_s));
+	ufm->bfa = bfa;
+	ufm->num_ufs = cfg->fwcfg.num_uf_bufs;
+	INIT_LIST_HEAD(&ufm->uf_free_q);
+	INIT_LIST_HEAD(&ufm->uf_posted_q);
+
+	uf_mem_claim(ufm, meminfo);
+}
+
+static void
+bfa_uf_initdone(struct bfa_s *bfa)
+{
+}
+
+static void
+bfa_uf_detach(struct bfa_s *bfa)
+{
+}
+
+static struct bfa_uf_s *
+bfa_uf_get(struct bfa_uf_mod_s *uf_mod)
+{
+	struct bfa_uf_s   *uf;
+
+	bfa_q_deq(&uf_mod->uf_free_q, &uf);
+	return (uf);
+}
+
+static void
+bfa_uf_put(struct bfa_uf_mod_s *uf_mod, struct bfa_uf_s *uf)
+{
+	list_add_tail(&uf->qe, &uf_mod->uf_free_q);
+}
+
+static bfa_status_t
+bfa_uf_post(struct bfa_uf_mod_s *ufm, struct bfa_uf_s *uf)
+{
+	struct bfi_uf_buf_post_s *uf_post_msg;
+
+	uf_post_msg = bfa_reqq_next(ufm->bfa, BFA_REQQ_FCXP);
+	if (!uf_post_msg)
+		return BFA_STATUS_FAILED;
+
+	bfa_os_memcpy(uf_post_msg, &ufm->uf_buf_posts[uf->uf_tag],
+		      sizeof(struct bfi_uf_buf_post_s));
+	bfa_reqq_produce(ufm->bfa, BFA_REQQ_FCXP);
+
+	bfa_trc(ufm->bfa, uf->uf_tag);
+
+	list_add_tail(&uf->qe, &ufm->uf_posted_q);
+	return BFA_STATUS_OK;
+}
+
+static void
+bfa_uf_post_all(struct bfa_uf_mod_s *uf_mod)
+{
+	struct bfa_uf_s   *uf;
+
+	while ((uf = bfa_uf_get(uf_mod)) != NULL) {
+		if (bfa_uf_post(uf_mod, uf) != BFA_STATUS_OK)
+			break;
+	}
+}
+
+static void
+uf_recv(struct bfa_s *bfa, struct bfi_uf_frm_rcvd_s *m)
+{
+	struct bfa_uf_mod_s *ufm = BFA_UF_MOD(bfa);
+	u16        uf_tag = m->buf_tag;
+	struct bfa_uf_buf_s *uf_buf = &ufm->uf_pbs_kva[uf_tag];
+	struct bfa_uf_s   *uf = &ufm->uf_list[uf_tag];
+	u8        *buf = &uf_buf->d[0];
+	struct fchs_s         *fchs;
+
+	m->frm_len = bfa_os_ntohs(m->frm_len);
+	m->xfr_len = bfa_os_ntohs(m->xfr_len);
+
+	fchs = (struct fchs_s *) uf_buf;
+
+	list_del(&uf->qe);	/* dequeue from posted queue */
+
+	uf->data_ptr = buf;
+	uf->data_len = m->xfr_len;
+
+	bfa_assert(uf->data_len >= sizeof(struct fchs_s));
+
+	if (uf->data_len == sizeof(struct fchs_s)) {
+		bfa_plog_fchdr(bfa->plog, BFA_PL_MID_HAL_UF, BFA_PL_EID_RX,
+			       uf->data_len, (struct fchs_s *) buf);
+	} else {
+		u32        pld_w0 = *((u32 *) (buf + sizeof(struct fchs_s)));
+		bfa_plog_fchdr_and_pl(bfa->plog, BFA_PL_MID_HAL_UF,
+				      BFA_PL_EID_RX, uf->data_len,
+				      (struct fchs_s *) buf, pld_w0);
+	}
+
+	bfa_cb_queue(bfa, &uf->hcb_qe, __bfa_cb_uf_recv, uf);
+}
+
+static void
+bfa_uf_stop(struct bfa_s *bfa)
+{
+}
+
+static void
+bfa_uf_iocdisable(struct bfa_s *bfa)
+{
+	struct bfa_uf_mod_s *ufm = BFA_UF_MOD(bfa);
+	struct bfa_uf_s   *uf;
+	struct list_head        *qe, *qen;
+
+	list_for_each_safe(qe, qen, &ufm->uf_posted_q) {
+		uf = (struct bfa_uf_s *) qe;
+		list_del(&uf->qe);
+		bfa_uf_put(ufm, uf);
+	}
+}
+
+static void
+bfa_uf_start(struct bfa_s *bfa)
+{
+	bfa_uf_post_all(BFA_UF_MOD(bfa));
+}
+
+
+
+/**
+ *  bfa_uf_api
+ */
+
+/**
+ * 		Register handler for all unsolicted recieve frames.
+ *
+ * @param[in]	bfa		BFA instance
+ * @param[in]	ufrecv	receive handler function
+ * @param[in]	cbarg	receive handler arg
+ */
+void
+bfa_uf_recv_register(struct bfa_s *bfa, bfa_cb_uf_recv_t ufrecv, void *cbarg)
+{
+	struct bfa_uf_mod_s *ufm = BFA_UF_MOD(bfa);
+
+	ufm->ufrecv = ufrecv;
+	ufm->cbarg = cbarg;
+}
+
+/**
+ * 		Free an unsolicited frame back to BFA.
+ *
+ * @param[in]		uf		unsolicited frame to be freed
+ *
+ * @return None
+ */
+void
+bfa_uf_free(struct bfa_uf_s *uf)
+{
+	bfa_uf_put(BFA_UF_MOD(uf->bfa), uf);
+	bfa_uf_post_all(BFA_UF_MOD(uf->bfa));
+}
+
+
+
+/**
+ *  uf_pub BFA uf module public functions
+ */
+
+void
+bfa_uf_isr(struct bfa_s *bfa, struct bfi_msg_s *msg)
+{
+	bfa_trc(bfa, msg->mhdr.msg_id);
+
+	switch (msg->mhdr.msg_id) {
+	case BFI_UF_I2H_FRM_RCVD:
+		uf_recv(bfa, (struct bfi_uf_frm_rcvd_s *) msg);
+		break;
+
+	default:
+		bfa_trc(bfa, msg->mhdr.msg_id);
+		bfa_assert(0);
+	}
+}
+
+