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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/scsi/elx/efct/efct_hw.c
parentInitial commit. (diff)
downloadlinux-upstream.tar.xz
linux-upstream.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/scsi/elx/efct/efct_hw.c')
-rw-r--r--drivers/scsi/elx/efct/efct_hw.c3580
1 files changed, 3580 insertions, 0 deletions
diff --git a/drivers/scsi/elx/efct/efct_hw.c b/drivers/scsi/elx/efct/efct_hw.c
new file mode 100644
index 000000000..5a5525054
--- /dev/null
+++ b/drivers/scsi/elx/efct/efct_hw.c
@@ -0,0 +1,3580 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+#include "efct_driver.h"
+#include "efct_hw.h"
+#include "efct_unsol.h"
+
+struct efct_hw_link_stat_cb_arg {
+ void (*cb)(int status, u32 num_counters,
+ struct efct_hw_link_stat_counts *counters, void *arg);
+ void *arg;
+};
+
+struct efct_hw_host_stat_cb_arg {
+ void (*cb)(int status, u32 num_counters,
+ struct efct_hw_host_stat_counts *counters, void *arg);
+ void *arg;
+};
+
+struct efct_hw_fw_wr_cb_arg {
+ void (*cb)(int status, u32 bytes_written, u32 change_status, void *arg);
+ void *arg;
+};
+
+struct efct_mbox_rqst_ctx {
+ int (*callback)(struct efc *efc, int status, u8 *mqe, void *arg);
+ void *arg;
+};
+
+static int
+efct_hw_link_event_init(struct efct_hw *hw)
+{
+ hw->link.status = SLI4_LINK_STATUS_MAX;
+ hw->link.topology = SLI4_LINK_TOPO_NONE;
+ hw->link.medium = SLI4_LINK_MEDIUM_MAX;
+ hw->link.speed = 0;
+ hw->link.loop_map = NULL;
+ hw->link.fc_id = U32_MAX;
+
+ return 0;
+}
+
+static int
+efct_hw_read_max_dump_size(struct efct_hw *hw)
+{
+ u8 buf[SLI4_BMBX_SIZE];
+ struct efct *efct = hw->os;
+ int rc = 0;
+ struct sli4_rsp_cmn_set_dump_location *rsp;
+
+ /* attempt to detemine the dump size for function 0 only. */
+ if (PCI_FUNC(efct->pci->devfn) != 0)
+ return rc;
+
+ if (sli_cmd_common_set_dump_location(&hw->sli, buf, 1, 0, NULL, 0))
+ return -EIO;
+
+ rsp = (struct sli4_rsp_cmn_set_dump_location *)
+ (buf + offsetof(struct sli4_cmd_sli_config, payload.embed));
+
+ rc = efct_hw_command(hw, buf, EFCT_CMD_POLL, NULL, NULL);
+ if (rc != 0) {
+ efc_log_debug(hw->os, "set dump location cmd failed\n");
+ return rc;
+ }
+
+ hw->dump_size =
+ le32_to_cpu(rsp->buffer_length_dword) & SLI4_CMN_SET_DUMP_BUFFER_LEN;
+
+ efc_log_debug(hw->os, "Dump size %x\n", hw->dump_size);
+
+ return rc;
+}
+
+static int
+__efct_read_topology_cb(struct efct_hw *hw, int status, u8 *mqe, void *arg)
+{
+ struct sli4_cmd_read_topology *read_topo =
+ (struct sli4_cmd_read_topology *)mqe;
+ u8 speed;
+ struct efc_domain_record drec = {0};
+ struct efct *efct = hw->os;
+
+ if (status || le16_to_cpu(read_topo->hdr.status)) {
+ efc_log_debug(hw->os, "bad status cqe=%#x mqe=%#x\n", status,
+ le16_to_cpu(read_topo->hdr.status));
+ return -EIO;
+ }
+
+ switch (le32_to_cpu(read_topo->dw2_attentype) &
+ SLI4_READTOPO_ATTEN_TYPE) {
+ case SLI4_READ_TOPOLOGY_LINK_UP:
+ hw->link.status = SLI4_LINK_STATUS_UP;
+ break;
+ case SLI4_READ_TOPOLOGY_LINK_DOWN:
+ hw->link.status = SLI4_LINK_STATUS_DOWN;
+ break;
+ case SLI4_READ_TOPOLOGY_LINK_NO_ALPA:
+ hw->link.status = SLI4_LINK_STATUS_NO_ALPA;
+ break;
+ default:
+ hw->link.status = SLI4_LINK_STATUS_MAX;
+ break;
+ }
+
+ switch (read_topo->topology) {
+ case SLI4_READ_TOPO_NON_FC_AL:
+ hw->link.topology = SLI4_LINK_TOPO_NON_FC_AL;
+ break;
+ case SLI4_READ_TOPO_FC_AL:
+ hw->link.topology = SLI4_LINK_TOPO_FC_AL;
+ if (hw->link.status == SLI4_LINK_STATUS_UP)
+ hw->link.loop_map = hw->loop_map.virt;
+ hw->link.fc_id = read_topo->acquired_al_pa;
+ break;
+ default:
+ hw->link.topology = SLI4_LINK_TOPO_MAX;
+ break;
+ }
+
+ hw->link.medium = SLI4_LINK_MEDIUM_FC;
+
+ speed = (le32_to_cpu(read_topo->currlink_state) &
+ SLI4_READTOPO_LINKSTATE_SPEED) >> 8;
+ switch (speed) {
+ case SLI4_READ_TOPOLOGY_SPEED_1G:
+ hw->link.speed = 1 * 1000;
+ break;
+ case SLI4_READ_TOPOLOGY_SPEED_2G:
+ hw->link.speed = 2 * 1000;
+ break;
+ case SLI4_READ_TOPOLOGY_SPEED_4G:
+ hw->link.speed = 4 * 1000;
+ break;
+ case SLI4_READ_TOPOLOGY_SPEED_8G:
+ hw->link.speed = 8 * 1000;
+ break;
+ case SLI4_READ_TOPOLOGY_SPEED_16G:
+ hw->link.speed = 16 * 1000;
+ break;
+ case SLI4_READ_TOPOLOGY_SPEED_32G:
+ hw->link.speed = 32 * 1000;
+ break;
+ case SLI4_READ_TOPOLOGY_SPEED_64G:
+ hw->link.speed = 64 * 1000;
+ break;
+ case SLI4_READ_TOPOLOGY_SPEED_128G:
+ hw->link.speed = 128 * 1000;
+ break;
+ }
+
+ drec.speed = hw->link.speed;
+ drec.fc_id = hw->link.fc_id;
+ drec.is_nport = true;
+ efc_domain_cb(efct->efcport, EFC_HW_DOMAIN_FOUND, &drec);
+
+ return 0;
+}
+
+static int
+efct_hw_cb_link(void *ctx, void *e)
+{
+ struct efct_hw *hw = ctx;
+ struct sli4_link_event *event = e;
+ struct efc_domain *d = NULL;
+ int rc = 0;
+ struct efct *efct = hw->os;
+
+ efct_hw_link_event_init(hw);
+
+ switch (event->status) {
+ case SLI4_LINK_STATUS_UP:
+
+ hw->link = *event;
+ efct->efcport->link_status = EFC_LINK_STATUS_UP;
+
+ if (event->topology == SLI4_LINK_TOPO_NON_FC_AL) {
+ struct efc_domain_record drec = {0};
+
+ efc_log_info(hw->os, "Link Up, NPORT, speed is %d\n",
+ event->speed);
+ drec.speed = event->speed;
+ drec.fc_id = event->fc_id;
+ drec.is_nport = true;
+ efc_domain_cb(efct->efcport, EFC_HW_DOMAIN_FOUND,
+ &drec);
+ } else if (event->topology == SLI4_LINK_TOPO_FC_AL) {
+ u8 buf[SLI4_BMBX_SIZE];
+
+ efc_log_info(hw->os, "Link Up, LOOP, speed is %d\n",
+ event->speed);
+
+ if (!sli_cmd_read_topology(&hw->sli, buf,
+ &hw->loop_map)) {
+ rc = efct_hw_command(hw, buf, EFCT_CMD_NOWAIT,
+ __efct_read_topology_cb, NULL);
+ }
+
+ if (rc)
+ efc_log_debug(hw->os, "READ_TOPOLOGY failed\n");
+ } else {
+ efc_log_info(hw->os, "%s(%#x), speed is %d\n",
+ "Link Up, unsupported topology ",
+ event->topology, event->speed);
+ }
+ break;
+ case SLI4_LINK_STATUS_DOWN:
+ efc_log_info(hw->os, "Link down\n");
+
+ hw->link.status = event->status;
+ efct->efcport->link_status = EFC_LINK_STATUS_DOWN;
+
+ d = efct->efcport->domain;
+ if (d)
+ efc_domain_cb(efct->efcport, EFC_HW_DOMAIN_LOST, d);
+ break;
+ default:
+ efc_log_debug(hw->os, "unhandled link status %#x\n",
+ event->status);
+ break;
+ }
+
+ return 0;
+}
+
+int
+efct_hw_setup(struct efct_hw *hw, void *os, struct pci_dev *pdev)
+{
+ u32 i, max_sgl, cpus;
+
+ if (hw->hw_setup_called)
+ return 0;
+
+ /*
+ * efct_hw_init() relies on NULL pointers indicating that a structure
+ * needs allocation. If a structure is non-NULL, efct_hw_init() won't
+ * free/realloc that memory
+ */
+ memset(hw, 0, sizeof(struct efct_hw));
+
+ hw->hw_setup_called = true;
+
+ hw->os = os;
+
+ mutex_init(&hw->bmbx_lock);
+ spin_lock_init(&hw->cmd_lock);
+ INIT_LIST_HEAD(&hw->cmd_head);
+ INIT_LIST_HEAD(&hw->cmd_pending);
+ hw->cmd_head_count = 0;
+
+ /* Create mailbox command ctx pool */
+ hw->cmd_ctx_pool = mempool_create_kmalloc_pool(EFCT_CMD_CTX_POOL_SZ,
+ sizeof(struct efct_command_ctx));
+ if (!hw->cmd_ctx_pool) {
+ efc_log_err(hw->os, "failed to allocate mailbox buffer pool\n");
+ return -EIO;
+ }
+
+ /* Create mailbox request ctx pool for library callback */
+ hw->mbox_rqst_pool = mempool_create_kmalloc_pool(EFCT_CMD_CTX_POOL_SZ,
+ sizeof(struct efct_mbox_rqst_ctx));
+ if (!hw->mbox_rqst_pool) {
+ efc_log_err(hw->os, "failed to allocate mbox request pool\n");
+ return -EIO;
+ }
+
+ spin_lock_init(&hw->io_lock);
+ INIT_LIST_HEAD(&hw->io_inuse);
+ INIT_LIST_HEAD(&hw->io_free);
+ INIT_LIST_HEAD(&hw->io_wait_free);
+
+ atomic_set(&hw->io_alloc_failed_count, 0);
+
+ hw->config.speed = SLI4_LINK_SPEED_AUTO_16_8_4;
+ if (sli_setup(&hw->sli, hw->os, pdev, ((struct efct *)os)->reg)) {
+ efc_log_err(hw->os, "SLI setup failed\n");
+ return -EIO;
+ }
+
+ efct_hw_link_event_init(hw);
+
+ sli_callback(&hw->sli, SLI4_CB_LINK, efct_hw_cb_link, hw);
+
+ /*
+ * Set all the queue sizes to the maximum allowed.
+ */
+ for (i = 0; i < ARRAY_SIZE(hw->num_qentries); i++)
+ hw->num_qentries[i] = hw->sli.qinfo.max_qentries[i];
+ /*
+ * Adjust the size of the WQs so that the CQ is twice as big as
+ * the WQ to allow for 2 completions per IO. This allows us to
+ * handle multi-phase as well as aborts.
+ */
+ hw->num_qentries[SLI4_QTYPE_WQ] = hw->num_qentries[SLI4_QTYPE_CQ] / 2;
+
+ /*
+ * The RQ assignment for RQ pair mode.
+ */
+
+ hw->config.rq_default_buffer_size = EFCT_HW_RQ_SIZE_PAYLOAD;
+ hw->config.n_io = hw->sli.ext[SLI4_RSRC_XRI].size;
+
+ cpus = num_possible_cpus();
+ hw->config.n_eq = cpus > EFCT_HW_MAX_NUM_EQ ? EFCT_HW_MAX_NUM_EQ : cpus;
+
+ max_sgl = sli_get_max_sgl(&hw->sli) - SLI4_SGE_MAX_RESERVED;
+ max_sgl = (max_sgl > EFCT_FC_MAX_SGL) ? EFCT_FC_MAX_SGL : max_sgl;
+ hw->config.n_sgl = max_sgl;
+
+ (void)efct_hw_read_max_dump_size(hw);
+
+ return 0;
+}
+
+static void
+efct_logfcfi(struct efct_hw *hw, u32 j, u32 i, u32 id)
+{
+ efc_log_info(hw->os,
+ "REG_FCFI: filter[%d] %08X -> RQ[%d] id=%d\n",
+ j, hw->config.filter_def[j], i, id);
+}
+
+static inline void
+efct_hw_init_free_io(struct efct_hw_io *io)
+{
+ /*
+ * Set io->done to NULL, to avoid any callbacks, should
+ * a completion be received for one of these IOs
+ */
+ io->done = NULL;
+ io->abort_done = NULL;
+ io->status_saved = false;
+ io->abort_in_progress = false;
+ io->type = 0xFFFF;
+ io->wq = NULL;
+}
+
+static bool efct_hw_iotype_is_originator(u16 io_type)
+{
+ switch (io_type) {
+ case EFCT_HW_FC_CT:
+ case EFCT_HW_ELS_REQ:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static void
+efct_hw_io_restore_sgl(struct efct_hw *hw, struct efct_hw_io *io)
+{
+ /* Restore the default */
+ io->sgl = &io->def_sgl;
+ io->sgl_count = io->def_sgl_count;
+}
+
+static void
+efct_hw_wq_process_io(void *arg, u8 *cqe, int status)
+{
+ struct efct_hw_io *io = arg;
+ struct efct_hw *hw = io->hw;
+ struct sli4_fc_wcqe *wcqe = (void *)cqe;
+ u32 len = 0;
+ u32 ext = 0;
+
+ /* clear xbusy flag if WCQE[XB] is clear */
+ if (io->xbusy && (wcqe->flags & SLI4_WCQE_XB) == 0)
+ io->xbusy = false;
+
+ /* get extended CQE status */
+ switch (io->type) {
+ case EFCT_HW_BLS_ACC:
+ case EFCT_HW_BLS_RJT:
+ break;
+ case EFCT_HW_ELS_REQ:
+ sli_fc_els_did(&hw->sli, cqe, &ext);
+ len = sli_fc_response_length(&hw->sli, cqe);
+ break;
+ case EFCT_HW_ELS_RSP:
+ case EFCT_HW_FC_CT_RSP:
+ break;
+ case EFCT_HW_FC_CT:
+ len = sli_fc_response_length(&hw->sli, cqe);
+ break;
+ case EFCT_HW_IO_TARGET_WRITE:
+ len = sli_fc_io_length(&hw->sli, cqe);
+ break;
+ case EFCT_HW_IO_TARGET_READ:
+ len = sli_fc_io_length(&hw->sli, cqe);
+ break;
+ case EFCT_HW_IO_TARGET_RSP:
+ break;
+ case EFCT_HW_IO_DNRX_REQUEUE:
+ /* release the count for re-posting the buffer */
+ /* efct_hw_io_free(hw, io); */
+ break;
+ default:
+ efc_log_err(hw->os, "unhandled io type %#x for XRI 0x%x\n",
+ io->type, io->indicator);
+ break;
+ }
+ if (status) {
+ ext = sli_fc_ext_status(&hw->sli, cqe);
+ /*
+ * If we're not an originator IO, and XB is set, then issue
+ * abort for the IO from within the HW
+ */
+ if (efct_hw_iotype_is_originator(io->type) &&
+ wcqe->flags & SLI4_WCQE_XB) {
+ int rc;
+
+ efc_log_debug(hw->os, "aborting xri=%#x tag=%#x\n",
+ io->indicator, io->reqtag);
+
+ /*
+ * Because targets may send a response when the IO
+ * completes using the same XRI, we must wait for the
+ * XRI_ABORTED CQE to issue the IO callback
+ */
+ rc = efct_hw_io_abort(hw, io, false, NULL, NULL);
+ if (rc == 0) {
+ /*
+ * latch status to return after abort is
+ * complete
+ */
+ io->status_saved = true;
+ io->saved_status = status;
+ io->saved_ext = ext;
+ io->saved_len = len;
+ goto exit_efct_hw_wq_process_io;
+ } else if (rc == -EINPROGRESS) {
+ /*
+ * Already being aborted by someone else (ABTS
+ * perhaps). Just return original
+ * error.
+ */
+ efc_log_debug(hw->os, "%s%#x tag=%#x\n",
+ "abort in progress xri=",
+ io->indicator, io->reqtag);
+
+ } else {
+ /* Failed to abort for some other reason, log
+ * error
+ */
+ efc_log_debug(hw->os, "%s%#x tag=%#x rc=%d\n",
+ "Failed to abort xri=",
+ io->indicator, io->reqtag, rc);
+ }
+ }
+ }
+
+ if (io->done) {
+ efct_hw_done_t done = io->done;
+
+ io->done = NULL;
+
+ if (io->status_saved) {
+ /* use latched status if exists */
+ status = io->saved_status;
+ len = io->saved_len;
+ ext = io->saved_ext;
+ io->status_saved = false;
+ }
+
+ /* Restore default SGL */
+ efct_hw_io_restore_sgl(hw, io);
+ done(io, len, status, ext, io->arg);
+ }
+
+exit_efct_hw_wq_process_io:
+ return;
+}
+
+static int
+efct_hw_setup_io(struct efct_hw *hw)
+{
+ u32 i = 0;
+ struct efct_hw_io *io = NULL;
+ uintptr_t xfer_virt = 0;
+ uintptr_t xfer_phys = 0;
+ u32 index;
+ bool new_alloc = true;
+ struct efc_dma *dma;
+ struct efct *efct = hw->os;
+
+ if (!hw->io) {
+ hw->io = kmalloc_array(hw->config.n_io, sizeof(io), GFP_KERNEL);
+ if (!hw->io)
+ return -ENOMEM;
+
+ memset(hw->io, 0, hw->config.n_io * sizeof(io));
+
+ for (i = 0; i < hw->config.n_io; i++) {
+ hw->io[i] = kzalloc(sizeof(*io), GFP_KERNEL);
+ if (!hw->io[i])
+ goto error;
+ }
+
+ /* Create WQE buffs for IO */
+ hw->wqe_buffs = kzalloc((hw->config.n_io * hw->sli.wqe_size),
+ GFP_KERNEL);
+ if (!hw->wqe_buffs) {
+ kfree(hw->io);
+ return -ENOMEM;
+ }
+
+ } else {
+ /* re-use existing IOs, including SGLs */
+ new_alloc = false;
+ }
+
+ if (new_alloc) {
+ dma = &hw->xfer_rdy;
+ dma->size = sizeof(struct fcp_txrdy) * hw->config.n_io;
+ dma->virt = dma_alloc_coherent(&efct->pci->dev,
+ dma->size, &dma->phys, GFP_KERNEL);
+ if (!dma->virt)
+ return -ENOMEM;
+ }
+ xfer_virt = (uintptr_t)hw->xfer_rdy.virt;
+ xfer_phys = hw->xfer_rdy.phys;
+
+ /* Initialize the pool of HW IO objects */
+ for (i = 0; i < hw->config.n_io; i++) {
+ struct hw_wq_callback *wqcb;
+
+ io = hw->io[i];
+
+ /* initialize IO fields */
+ io->hw = hw;
+
+ /* Assign a WQE buff */
+ io->wqe.wqebuf = &hw->wqe_buffs[i * hw->sli.wqe_size];
+
+ /* Allocate the request tag for this IO */
+ wqcb = efct_hw_reqtag_alloc(hw, efct_hw_wq_process_io, io);
+ if (!wqcb) {
+ efc_log_err(hw->os, "can't allocate request tag\n");
+ return -ENOSPC;
+ }
+ io->reqtag = wqcb->instance_index;
+
+ /* Now for the fields that are initialized on each free */
+ efct_hw_init_free_io(io);
+
+ /* The XB flag isn't cleared on IO free, so init to zero */
+ io->xbusy = 0;
+
+ if (sli_resource_alloc(&hw->sli, SLI4_RSRC_XRI,
+ &io->indicator, &index)) {
+ efc_log_err(hw->os,
+ "sli_resource_alloc failed @ %d\n", i);
+ return -ENOMEM;
+ }
+
+ if (new_alloc) {
+ dma = &io->def_sgl;
+ dma->size = hw->config.n_sgl *
+ sizeof(struct sli4_sge);
+ dma->virt = dma_alloc_coherent(&efct->pci->dev,
+ dma->size, &dma->phys,
+ GFP_KERNEL);
+ if (!dma->virt) {
+ efc_log_err(hw->os, "dma_alloc fail %d\n", i);
+ memset(&io->def_sgl, 0,
+ sizeof(struct efc_dma));
+ return -ENOMEM;
+ }
+ }
+ io->def_sgl_count = hw->config.n_sgl;
+ io->sgl = &io->def_sgl;
+ io->sgl_count = io->def_sgl_count;
+
+ if (hw->xfer_rdy.size) {
+ io->xfer_rdy.virt = (void *)xfer_virt;
+ io->xfer_rdy.phys = xfer_phys;
+ io->xfer_rdy.size = sizeof(struct fcp_txrdy);
+
+ xfer_virt += sizeof(struct fcp_txrdy);
+ xfer_phys += sizeof(struct fcp_txrdy);
+ }
+ }
+
+ return 0;
+error:
+ for (i = 0; i < hw->config.n_io && hw->io[i]; i++) {
+ kfree(hw->io[i]);
+ hw->io[i] = NULL;
+ }
+
+ kfree(hw->io);
+ hw->io = NULL;
+
+ return -ENOMEM;
+}
+
+static int
+efct_hw_init_prereg_io(struct efct_hw *hw)
+{
+ u32 i, idx = 0;
+ struct efct_hw_io *io = NULL;
+ u8 cmd[SLI4_BMBX_SIZE];
+ int rc = 0;
+ u32 n_rem;
+ u32 n = 0;
+ u32 sgls_per_request = 256;
+ struct efc_dma **sgls = NULL;
+ struct efc_dma req;
+ struct efct *efct = hw->os;
+
+ sgls = kmalloc_array(sgls_per_request, sizeof(*sgls), GFP_KERNEL);
+ if (!sgls)
+ return -ENOMEM;
+
+ memset(&req, 0, sizeof(struct efc_dma));
+ req.size = 32 + sgls_per_request * 16;
+ req.virt = dma_alloc_coherent(&efct->pci->dev, req.size, &req.phys,
+ GFP_KERNEL);
+ if (!req.virt) {
+ kfree(sgls);
+ return -ENOMEM;
+ }
+
+ for (n_rem = hw->config.n_io; n_rem; n_rem -= n) {
+ /* Copy address of SGL's into local sgls[] array, break
+ * out if the xri is not contiguous.
+ */
+ u32 min = (sgls_per_request < n_rem) ? sgls_per_request : n_rem;
+
+ for (n = 0; n < min; n++) {
+ /* Check that we have contiguous xri values */
+ if (n > 0) {
+ if (hw->io[idx + n]->indicator !=
+ hw->io[idx + n - 1]->indicator + 1)
+ break;
+ }
+
+ sgls[n] = hw->io[idx + n]->sgl;
+ }
+
+ if (sli_cmd_post_sgl_pages(&hw->sli, cmd,
+ hw->io[idx]->indicator, n, sgls, NULL, &req)) {
+ rc = -EIO;
+ break;
+ }
+
+ rc = efct_hw_command(hw, cmd, EFCT_CMD_POLL, NULL, NULL);
+ if (rc) {
+ efc_log_err(hw->os, "SGL post failed, rc=%d\n", rc);
+ break;
+ }
+
+ /* Add to tail if successful */
+ for (i = 0; i < n; i++, idx++) {
+ io = hw->io[idx];
+ io->state = EFCT_HW_IO_STATE_FREE;
+ INIT_LIST_HEAD(&io->list_entry);
+ list_add_tail(&io->list_entry, &hw->io_free);
+ }
+ }
+
+ dma_free_coherent(&efct->pci->dev, req.size, req.virt, req.phys);
+ memset(&req, 0, sizeof(struct efc_dma));
+ kfree(sgls);
+
+ return rc;
+}
+
+static int
+efct_hw_init_io(struct efct_hw *hw)
+{
+ u32 i, idx = 0;
+ bool prereg = false;
+ struct efct_hw_io *io = NULL;
+ int rc = 0;
+
+ prereg = hw->sli.params.sgl_pre_registered;
+
+ if (prereg)
+ return efct_hw_init_prereg_io(hw);
+
+ for (i = 0; i < hw->config.n_io; i++, idx++) {
+ io = hw->io[idx];
+ io->state = EFCT_HW_IO_STATE_FREE;
+ INIT_LIST_HEAD(&io->list_entry);
+ list_add_tail(&io->list_entry, &hw->io_free);
+ }
+
+ return rc;
+}
+
+static int
+efct_hw_config_set_fdt_xfer_hint(struct efct_hw *hw, u32 fdt_xfer_hint)
+{
+ int rc = 0;
+ u8 buf[SLI4_BMBX_SIZE];
+ struct sli4_rqst_cmn_set_features_set_fdt_xfer_hint param;
+
+ memset(&param, 0, sizeof(param));
+ param.fdt_xfer_hint = cpu_to_le32(fdt_xfer_hint);
+ /* build the set_features command */
+ sli_cmd_common_set_features(&hw->sli, buf,
+ SLI4_SET_FEATURES_SET_FTD_XFER_HINT, sizeof(param), &param);
+
+ rc = efct_hw_command(hw, buf, EFCT_CMD_POLL, NULL, NULL);
+ if (rc)
+ efc_log_warn(hw->os, "set FDT hint %d failed: %d\n",
+ fdt_xfer_hint, rc);
+ else
+ efc_log_info(hw->os, "Set FTD transfer hint to %d\n",
+ le32_to_cpu(param.fdt_xfer_hint));
+
+ return rc;
+}
+
+static int
+efct_hw_config_rq(struct efct_hw *hw)
+{
+ u32 min_rq_count, i, rc;
+ struct sli4_cmd_rq_cfg rq_cfg[SLI4_CMD_REG_FCFI_NUM_RQ_CFG];
+ u8 buf[SLI4_BMBX_SIZE];
+
+ efc_log_info(hw->os, "using REG_FCFI standard\n");
+
+ /*
+ * Set the filter match/mask values from hw's
+ * filter_def values
+ */
+ for (i = 0; i < SLI4_CMD_REG_FCFI_NUM_RQ_CFG; i++) {
+ rq_cfg[i].rq_id = cpu_to_le16(0xffff);
+ rq_cfg[i].r_ctl_mask = (u8)hw->config.filter_def[i];
+ rq_cfg[i].r_ctl_match = (u8)(hw->config.filter_def[i] >> 8);
+ rq_cfg[i].type_mask = (u8)(hw->config.filter_def[i] >> 16);
+ rq_cfg[i].type_match = (u8)(hw->config.filter_def[i] >> 24);
+ }
+
+ /*
+ * Update the rq_id's of the FCF configuration
+ * (don't update more than the number of rq_cfg
+ * elements)
+ */
+ min_rq_count = (hw->hw_rq_count < SLI4_CMD_REG_FCFI_NUM_RQ_CFG) ?
+ hw->hw_rq_count : SLI4_CMD_REG_FCFI_NUM_RQ_CFG;
+ for (i = 0; i < min_rq_count; i++) {
+ struct hw_rq *rq = hw->hw_rq[i];
+ u32 j;
+
+ for (j = 0; j < SLI4_CMD_REG_FCFI_NUM_RQ_CFG; j++) {
+ u32 mask = (rq->filter_mask != 0) ?
+ rq->filter_mask : 1;
+
+ if (!(mask & (1U << j)))
+ continue;
+
+ rq_cfg[i].rq_id = cpu_to_le16(rq->hdr->id);
+ efct_logfcfi(hw, j, i, rq->hdr->id);
+ }
+ }
+
+ rc = -EIO;
+ if (!sli_cmd_reg_fcfi(&hw->sli, buf, 0, rq_cfg))
+ rc = efct_hw_command(hw, buf, EFCT_CMD_POLL, NULL, NULL);
+
+ if (rc != 0) {
+ efc_log_err(hw->os, "FCFI registration failed\n");
+ return rc;
+ }
+ hw->fcf_indicator =
+ le16_to_cpu(((struct sli4_cmd_reg_fcfi *)buf)->fcfi);
+
+ return rc;
+}
+
+static int
+efct_hw_config_mrq(struct efct_hw *hw, u8 mode, u16 fcf_index)
+{
+ u8 buf[SLI4_BMBX_SIZE], mrq_bitmask = 0;
+ struct hw_rq *rq;
+ struct sli4_cmd_reg_fcfi_mrq *rsp = NULL;
+ struct sli4_cmd_rq_cfg rq_filter[SLI4_CMD_REG_FCFI_MRQ_NUM_RQ_CFG];
+ u32 rc, i;
+
+ if (mode == SLI4_CMD_REG_FCFI_SET_FCFI_MODE)
+ goto issue_cmd;
+
+ /* Set the filter match/mask values from hw's filter_def values */
+ for (i = 0; i < SLI4_CMD_REG_FCFI_NUM_RQ_CFG; i++) {
+ rq_filter[i].rq_id = cpu_to_le16(0xffff);
+ rq_filter[i].type_mask = (u8)hw->config.filter_def[i];
+ rq_filter[i].type_match = (u8)(hw->config.filter_def[i] >> 8);
+ rq_filter[i].r_ctl_mask = (u8)(hw->config.filter_def[i] >> 16);
+ rq_filter[i].r_ctl_match = (u8)(hw->config.filter_def[i] >> 24);
+ }
+
+ rq = hw->hw_rq[0];
+ rq_filter[0].rq_id = cpu_to_le16(rq->hdr->id);
+ rq_filter[1].rq_id = cpu_to_le16(rq->hdr->id);
+
+ mrq_bitmask = 0x2;
+issue_cmd:
+ efc_log_debug(hw->os, "Issue reg_fcfi_mrq count:%d policy:%d mode:%d\n",
+ hw->hw_rq_count, hw->config.rq_selection_policy, mode);
+ /* Invoke REG_FCFI_MRQ */
+ rc = sli_cmd_reg_fcfi_mrq(&hw->sli, buf, mode, fcf_index,
+ hw->config.rq_selection_policy, mrq_bitmask,
+ hw->hw_mrq_count, rq_filter);
+ if (rc) {
+ efc_log_err(hw->os, "sli_cmd_reg_fcfi_mrq() failed\n");
+ return -EIO;
+ }
+
+ rc = efct_hw_command(hw, buf, EFCT_CMD_POLL, NULL, NULL);
+
+ rsp = (struct sli4_cmd_reg_fcfi_mrq *)buf;
+
+ if ((rc) || (le16_to_cpu(rsp->hdr.status))) {
+ efc_log_err(hw->os, "FCFI MRQ reg failed. cmd=%x status=%x\n",
+ rsp->hdr.command, le16_to_cpu(rsp->hdr.status));
+ return -EIO;
+ }
+
+ if (mode == SLI4_CMD_REG_FCFI_SET_FCFI_MODE)
+ hw->fcf_indicator = le16_to_cpu(rsp->fcfi);
+
+ return 0;
+}
+
+static void
+efct_hw_queue_hash_add(struct efct_queue_hash *hash,
+ u16 id, u16 index)
+{
+ u32 hash_index = id & (EFCT_HW_Q_HASH_SIZE - 1);
+
+ /*
+ * Since the hash is always bigger than the number of queues, then we
+ * never have to worry about an infinite loop.
+ */
+ while (hash[hash_index].in_use)
+ hash_index = (hash_index + 1) & (EFCT_HW_Q_HASH_SIZE - 1);
+
+ /* not used, claim the entry */
+ hash[hash_index].id = id;
+ hash[hash_index].in_use = true;
+ hash[hash_index].index = index;
+}
+
+static int
+efct_hw_config_sli_port_health_check(struct efct_hw *hw, u8 query, u8 enable)
+{
+ int rc = 0;
+ u8 buf[SLI4_BMBX_SIZE];
+ struct sli4_rqst_cmn_set_features_health_check param;
+ u32 health_check_flag = 0;
+
+ memset(&param, 0, sizeof(param));
+
+ if (enable)
+ health_check_flag |= SLI4_RQ_HEALTH_CHECK_ENABLE;
+
+ if (query)
+ health_check_flag |= SLI4_RQ_HEALTH_CHECK_QUERY;
+
+ param.health_check_dword = cpu_to_le32(health_check_flag);
+
+ /* build the set_features command */
+ sli_cmd_common_set_features(&hw->sli, buf,
+ SLI4_SET_FEATURES_SLI_PORT_HEALTH_CHECK, sizeof(param), &param);
+
+ rc = efct_hw_command(hw, buf, EFCT_CMD_POLL, NULL, NULL);
+ if (rc)
+ efc_log_err(hw->os, "efct_hw_command returns %d\n", rc);
+ else
+ efc_log_debug(hw->os, "SLI Port Health Check is enabled\n");
+
+ return rc;
+}
+
+int
+efct_hw_init(struct efct_hw *hw)
+{
+ int rc;
+ u32 i = 0;
+ int rem_count;
+ unsigned long flags = 0;
+ struct efct_hw_io *temp;
+ struct efc_dma *dma;
+
+ /*
+ * Make sure the command lists are empty. If this is start-of-day,
+ * they'll be empty since they were just initialized in efct_hw_setup.
+ * If we've just gone through a reset, the command and command pending
+ * lists should have been cleaned up as part of the reset
+ * (efct_hw_reset()).
+ */
+ spin_lock_irqsave(&hw->cmd_lock, flags);
+ if (!list_empty(&hw->cmd_head)) {
+ spin_unlock_irqrestore(&hw->cmd_lock, flags);
+ efc_log_err(hw->os, "command found on cmd list\n");
+ return -EIO;
+ }
+ if (!list_empty(&hw->cmd_pending)) {
+ spin_unlock_irqrestore(&hw->cmd_lock, flags);
+ efc_log_err(hw->os, "command found on pending list\n");
+ return -EIO;
+ }
+ spin_unlock_irqrestore(&hw->cmd_lock, flags);
+
+ /* Free RQ buffers if prevously allocated */
+ efct_hw_rx_free(hw);
+
+ /*
+ * The IO queues must be initialized here for the reset case. The
+ * efct_hw_init_io() function will re-add the IOs to the free list.
+ * The cmd_head list should be OK since we free all entries in
+ * efct_hw_command_cancel() that is called in the efct_hw_reset().
+ */
+
+ /* If we are in this function due to a reset, there may be stale items
+ * on lists that need to be removed. Clean them up.
+ */
+ rem_count = 0;
+ while ((!list_empty(&hw->io_wait_free))) {
+ rem_count++;
+ temp = list_first_entry(&hw->io_wait_free, struct efct_hw_io,
+ list_entry);
+ list_del_init(&temp->list_entry);
+ }
+ if (rem_count > 0)
+ efc_log_debug(hw->os, "rmvd %d items from io_wait_free list\n",
+ rem_count);
+
+ rem_count = 0;
+ while ((!list_empty(&hw->io_inuse))) {
+ rem_count++;
+ temp = list_first_entry(&hw->io_inuse, struct efct_hw_io,
+ list_entry);
+ list_del_init(&temp->list_entry);
+ }
+ if (rem_count > 0)
+ efc_log_debug(hw->os, "rmvd %d items from io_inuse list\n",
+ rem_count);
+
+ rem_count = 0;
+ while ((!list_empty(&hw->io_free))) {
+ rem_count++;
+ temp = list_first_entry(&hw->io_free, struct efct_hw_io,
+ list_entry);
+ list_del_init(&temp->list_entry);
+ }
+ if (rem_count > 0)
+ efc_log_debug(hw->os, "rmvd %d items from io_free list\n",
+ rem_count);
+
+ /* If MRQ not required, Make sure we dont request feature. */
+ if (hw->config.n_rq == 1)
+ hw->sli.features &= (~SLI4_REQFEAT_MRQP);
+
+ if (sli_init(&hw->sli)) {
+ efc_log_err(hw->os, "SLI failed to initialize\n");
+ return -EIO;
+ }
+
+ if (hw->sliport_healthcheck) {
+ rc = efct_hw_config_sli_port_health_check(hw, 0, 1);
+ if (rc != 0) {
+ efc_log_err(hw->os, "Enable port Health check fail\n");
+ return rc;
+ }
+ }
+
+ /*
+ * Set FDT transfer hint, only works on Lancer
+ */
+ if (hw->sli.if_type == SLI4_INTF_IF_TYPE_2) {
+ /*
+ * Non-fatal error. In particular, we can disregard failure to
+ * set EFCT_HW_FDT_XFER_HINT on devices with legacy firmware
+ * that do not support EFCT_HW_FDT_XFER_HINT feature.
+ */
+ efct_hw_config_set_fdt_xfer_hint(hw, EFCT_HW_FDT_XFER_HINT);
+ }
+
+ /* zero the hashes */
+ memset(hw->cq_hash, 0, sizeof(hw->cq_hash));
+ efc_log_debug(hw->os, "Max CQs %d, hash size = %d\n",
+ EFCT_HW_MAX_NUM_CQ, EFCT_HW_Q_HASH_SIZE);
+
+ memset(hw->rq_hash, 0, sizeof(hw->rq_hash));
+ efc_log_debug(hw->os, "Max RQs %d, hash size = %d\n",
+ EFCT_HW_MAX_NUM_RQ, EFCT_HW_Q_HASH_SIZE);
+
+ memset(hw->wq_hash, 0, sizeof(hw->wq_hash));
+ efc_log_debug(hw->os, "Max WQs %d, hash size = %d\n",
+ EFCT_HW_MAX_NUM_WQ, EFCT_HW_Q_HASH_SIZE);
+
+ rc = efct_hw_init_queues(hw);
+ if (rc)
+ return rc;
+
+ rc = efct_hw_map_wq_cpu(hw);
+ if (rc)
+ return rc;
+
+ /* Allocate and p_st RQ buffers */
+ rc = efct_hw_rx_allocate(hw);
+ if (rc) {
+ efc_log_err(hw->os, "rx_allocate failed\n");
+ return rc;
+ }
+
+ rc = efct_hw_rx_post(hw);
+ if (rc) {
+ efc_log_err(hw->os, "WARNING - error posting RQ buffers\n");
+ return rc;
+ }
+
+ if (hw->config.n_eq == 1) {
+ rc = efct_hw_config_rq(hw);
+ if (rc) {
+ efc_log_err(hw->os, "config rq failed %d\n", rc);
+ return rc;
+ }
+ } else {
+ rc = efct_hw_config_mrq(hw, SLI4_CMD_REG_FCFI_SET_FCFI_MODE, 0);
+ if (rc != 0) {
+ efc_log_err(hw->os, "REG_FCFI_MRQ FCFI reg failed\n");
+ return rc;
+ }
+
+ rc = efct_hw_config_mrq(hw, SLI4_CMD_REG_FCFI_SET_MRQ_MODE, 0);
+ if (rc != 0) {
+ efc_log_err(hw->os, "REG_FCFI_MRQ MRQ reg failed\n");
+ return rc;
+ }
+ }
+
+ /*
+ * Allocate the WQ request tag pool, if not previously allocated
+ * (the request tag value is 16 bits, thus the pool allocation size
+ * of 64k)
+ */
+ hw->wq_reqtag_pool = efct_hw_reqtag_pool_alloc(hw);
+ if (!hw->wq_reqtag_pool) {
+ efc_log_err(hw->os, "efct_hw_reqtag_pool_alloc failed\n");
+ return -ENOMEM;
+ }
+
+ rc = efct_hw_setup_io(hw);
+ if (rc) {
+ efc_log_err(hw->os, "IO allocation failure\n");
+ return rc;
+ }
+
+ rc = efct_hw_init_io(hw);
+ if (rc) {
+ efc_log_err(hw->os, "IO initialization failure\n");
+ return rc;
+ }
+
+ dma = &hw->loop_map;
+ dma->size = SLI4_MIN_LOOP_MAP_BYTES;
+ dma->virt = dma_alloc_coherent(&hw->os->pci->dev, dma->size, &dma->phys,
+ GFP_KERNEL);
+ if (!dma->virt)
+ return -EIO;
+
+ /*
+ * Arming the EQ allows (e.g.) interrupts when CQ completions write EQ
+ * entries
+ */
+ for (i = 0; i < hw->eq_count; i++)
+ sli_queue_arm(&hw->sli, &hw->eq[i], true);
+
+ /*
+ * Initialize RQ hash
+ */
+ for (i = 0; i < hw->rq_count; i++)
+ efct_hw_queue_hash_add(hw->rq_hash, hw->rq[i].id, i);
+
+ /*
+ * Initialize WQ hash
+ */
+ for (i = 0; i < hw->wq_count; i++)
+ efct_hw_queue_hash_add(hw->wq_hash, hw->wq[i].id, i);
+
+ /*
+ * Arming the CQ allows (e.g.) MQ completions to write CQ entries
+ */
+ for (i = 0; i < hw->cq_count; i++) {
+ efct_hw_queue_hash_add(hw->cq_hash, hw->cq[i].id, i);
+ sli_queue_arm(&hw->sli, &hw->cq[i], true);
+ }
+
+ /* Set RQ process limit*/
+ for (i = 0; i < hw->hw_rq_count; i++) {
+ struct hw_rq *rq = hw->hw_rq[i];
+
+ hw->cq[rq->cq->instance].proc_limit = hw->config.n_io / 2;
+ }
+
+ /* record the fact that the queues are functional */
+ hw->state = EFCT_HW_STATE_ACTIVE;
+ /*
+ * Allocate a HW IOs for send frame.
+ */
+ hw->hw_wq[0]->send_frame_io = efct_hw_io_alloc(hw);
+ if (!hw->hw_wq[0]->send_frame_io)
+ efc_log_err(hw->os, "alloc for send_frame_io failed\n");
+
+ /* Initialize send frame sequence id */
+ atomic_set(&hw->send_frame_seq_id, 0);
+
+ return 0;
+}
+
+int
+efct_hw_parse_filter(struct efct_hw *hw, void *value)
+{
+ int rc = 0;
+ char *p = NULL;
+ char *token;
+ u32 idx = 0;
+
+ for (idx = 0; idx < ARRAY_SIZE(hw->config.filter_def); idx++)
+ hw->config.filter_def[idx] = 0;
+
+ p = kstrdup(value, GFP_KERNEL);
+ if (!p || !*p) {
+ efc_log_err(hw->os, "p is NULL\n");
+ return -ENOMEM;
+ }
+
+ idx = 0;
+ while ((token = strsep(&p, ",")) && *token) {
+ if (kstrtou32(token, 0, &hw->config.filter_def[idx++]))
+ efc_log_err(hw->os, "kstrtoint failed\n");
+
+ if (!p || !*p)
+ break;
+
+ if (idx == ARRAY_SIZE(hw->config.filter_def))
+ break;
+ }
+ kfree(p);
+
+ return rc;
+}
+
+u64
+efct_get_wwnn(struct efct_hw *hw)
+{
+ struct sli4 *sli = &hw->sli;
+ u8 p[8];
+
+ memcpy(p, sli->wwnn, sizeof(p));
+ return get_unaligned_be64(p);
+}
+
+u64
+efct_get_wwpn(struct efct_hw *hw)
+{
+ struct sli4 *sli = &hw->sli;
+ u8 p[8];
+
+ memcpy(p, sli->wwpn, sizeof(p));
+ return get_unaligned_be64(p);
+}
+
+static struct efc_hw_rq_buffer *
+efct_hw_rx_buffer_alloc(struct efct_hw *hw, u32 rqindex, u32 count,
+ u32 size)
+{
+ struct efct *efct = hw->os;
+ struct efc_hw_rq_buffer *rq_buf = NULL;
+ struct efc_hw_rq_buffer *prq;
+ u32 i;
+
+ if (!count)
+ return NULL;
+
+ rq_buf = kmalloc_array(count, sizeof(*rq_buf), GFP_KERNEL);
+ if (!rq_buf)
+ return NULL;
+ memset(rq_buf, 0, sizeof(*rq_buf) * count);
+
+ for (i = 0, prq = rq_buf; i < count; i ++, prq++) {
+ prq->rqindex = rqindex;
+ prq->dma.size = size;
+ prq->dma.virt = dma_alloc_coherent(&efct->pci->dev,
+ prq->dma.size,
+ &prq->dma.phys,
+ GFP_KERNEL);
+ if (!prq->dma.virt) {
+ efc_log_err(hw->os, "DMA allocation failed\n");
+ kfree(rq_buf);
+ return NULL;
+ }
+ }
+ return rq_buf;
+}
+
+static void
+efct_hw_rx_buffer_free(struct efct_hw *hw,
+ struct efc_hw_rq_buffer *rq_buf,
+ u32 count)
+{
+ struct efct *efct = hw->os;
+ u32 i;
+ struct efc_hw_rq_buffer *prq;
+
+ if (rq_buf) {
+ for (i = 0, prq = rq_buf; i < count; i++, prq++) {
+ dma_free_coherent(&efct->pci->dev,
+ prq->dma.size, prq->dma.virt,
+ prq->dma.phys);
+ memset(&prq->dma, 0, sizeof(struct efc_dma));
+ }
+
+ kfree(rq_buf);
+ }
+}
+
+int
+efct_hw_rx_allocate(struct efct_hw *hw)
+{
+ struct efct *efct = hw->os;
+ u32 i;
+ int rc = 0;
+ u32 rqindex = 0;
+ u32 hdr_size = EFCT_HW_RQ_SIZE_HDR;
+ u32 payload_size = hw->config.rq_default_buffer_size;
+
+ rqindex = 0;
+
+ for (i = 0; i < hw->hw_rq_count; i++) {
+ struct hw_rq *rq = hw->hw_rq[i];
+
+ /* Allocate header buffers */
+ rq->hdr_buf = efct_hw_rx_buffer_alloc(hw, rqindex,
+ rq->entry_count,
+ hdr_size);
+ if (!rq->hdr_buf) {
+ efc_log_err(efct, "rx_buffer_alloc hdr_buf failed\n");
+ rc = -EIO;
+ break;
+ }
+
+ efc_log_debug(hw->os,
+ "rq[%2d] rq_id %02d header %4d by %4d bytes\n",
+ i, rq->hdr->id, rq->entry_count, hdr_size);
+
+ rqindex++;
+
+ /* Allocate payload buffers */
+ rq->payload_buf = efct_hw_rx_buffer_alloc(hw, rqindex,
+ rq->entry_count,
+ payload_size);
+ if (!rq->payload_buf) {
+ efc_log_err(efct, "rx_buffer_alloc fb_buf failed\n");
+ rc = -EIO;
+ break;
+ }
+ efc_log_debug(hw->os,
+ "rq[%2d] rq_id %02d default %4d by %4d bytes\n",
+ i, rq->data->id, rq->entry_count, payload_size);
+ rqindex++;
+ }
+
+ return rc ? -EIO : 0;
+}
+
+int
+efct_hw_rx_post(struct efct_hw *hw)
+{
+ u32 i;
+ u32 idx;
+ u32 rq_idx;
+ int rc = 0;
+
+ if (!hw->seq_pool) {
+ u32 count = 0;
+
+ for (i = 0; i < hw->hw_rq_count; i++)
+ count += hw->hw_rq[i]->entry_count;
+
+ hw->seq_pool = kmalloc_array(count,
+ sizeof(struct efc_hw_sequence), GFP_KERNEL);
+ if (!hw->seq_pool)
+ return -ENOMEM;
+ }
+
+ /*
+ * In RQ pair mode, we MUST post the header and payload buffer at the
+ * same time.
+ */
+ for (rq_idx = 0, idx = 0; rq_idx < hw->hw_rq_count; rq_idx++) {
+ struct hw_rq *rq = hw->hw_rq[rq_idx];
+
+ for (i = 0; i < rq->entry_count - 1; i++) {
+ struct efc_hw_sequence *seq;
+
+ seq = hw->seq_pool + idx;
+ idx++;
+ seq->header = &rq->hdr_buf[i];
+ seq->payload = &rq->payload_buf[i];
+ rc = efct_hw_sequence_free(hw, seq);
+ if (rc)
+ break;
+ }
+ if (rc)
+ break;
+ }
+
+ if (rc && hw->seq_pool)
+ kfree(hw->seq_pool);
+
+ return rc;
+}
+
+void
+efct_hw_rx_free(struct efct_hw *hw)
+{
+ u32 i;
+
+ /* Free hw_rq buffers */
+ for (i = 0; i < hw->hw_rq_count; i++) {
+ struct hw_rq *rq = hw->hw_rq[i];
+
+ if (rq) {
+ efct_hw_rx_buffer_free(hw, rq->hdr_buf,
+ rq->entry_count);
+ rq->hdr_buf = NULL;
+ efct_hw_rx_buffer_free(hw, rq->payload_buf,
+ rq->entry_count);
+ rq->payload_buf = NULL;
+ }
+ }
+}
+
+static int
+efct_hw_cmd_submit_pending(struct efct_hw *hw)
+{
+ int rc = 0;
+
+ /* Assumes lock held */
+
+ /* Only submit MQE if there's room */
+ while (hw->cmd_head_count < (EFCT_HW_MQ_DEPTH - 1) &&
+ !list_empty(&hw->cmd_pending)) {
+ struct efct_command_ctx *ctx;
+
+ ctx = list_first_entry(&hw->cmd_pending,
+ struct efct_command_ctx, list_entry);
+ if (!ctx)
+ break;
+
+ list_del_init(&ctx->list_entry);
+
+ list_add_tail(&ctx->list_entry, &hw->cmd_head);
+ hw->cmd_head_count++;
+ if (sli_mq_write(&hw->sli, hw->mq, ctx->buf) < 0) {
+ efc_log_debug(hw->os,
+ "sli_queue_write failed: %d\n", rc);
+ rc = -EIO;
+ break;
+ }
+ }
+ return rc;
+}
+
+int
+efct_hw_command(struct efct_hw *hw, u8 *cmd, u32 opts, void *cb, void *arg)
+{
+ int rc = -EIO;
+ unsigned long flags = 0;
+ void *bmbx = NULL;
+
+ /*
+ * If the chip is in an error state (UE'd) then reject this mailbox
+ * command.
+ */
+ if (sli_fw_error_status(&hw->sli) > 0) {
+ efc_log_crit(hw->os, "Chip in an error state - reset needed\n");
+ efc_log_crit(hw->os, "status=%#x error1=%#x error2=%#x\n",
+ sli_reg_read_status(&hw->sli),
+ sli_reg_read_err1(&hw->sli),
+ sli_reg_read_err2(&hw->sli));
+
+ return -EIO;
+ }
+
+ /*
+ * Send a mailbox command to the hardware, and either wait for
+ * a completion (EFCT_CMD_POLL) or get an optional asynchronous
+ * completion (EFCT_CMD_NOWAIT).
+ */
+
+ if (opts == EFCT_CMD_POLL) {
+ mutex_lock(&hw->bmbx_lock);
+ bmbx = hw->sli.bmbx.virt;
+
+ memcpy(bmbx, cmd, SLI4_BMBX_SIZE);
+
+ if (sli_bmbx_command(&hw->sli) == 0) {
+ rc = 0;
+ memcpy(cmd, bmbx, SLI4_BMBX_SIZE);
+ }
+ mutex_unlock(&hw->bmbx_lock);
+ } else if (opts == EFCT_CMD_NOWAIT) {
+ struct efct_command_ctx *ctx = NULL;
+
+ if (hw->state != EFCT_HW_STATE_ACTIVE) {
+ efc_log_err(hw->os, "Can't send command, HW state=%d\n",
+ hw->state);
+ return -EIO;
+ }
+
+ ctx = mempool_alloc(hw->cmd_ctx_pool, GFP_ATOMIC);
+ if (!ctx)
+ return -ENOSPC;
+
+ memset(ctx, 0, sizeof(struct efct_command_ctx));
+
+ if (cb) {
+ ctx->cb = cb;
+ ctx->arg = arg;
+ }
+
+ memcpy(ctx->buf, cmd, SLI4_BMBX_SIZE);
+ ctx->ctx = hw;
+
+ spin_lock_irqsave(&hw->cmd_lock, flags);
+
+ /* Add to pending list */
+ INIT_LIST_HEAD(&ctx->list_entry);
+ list_add_tail(&ctx->list_entry, &hw->cmd_pending);
+
+ /* Submit as much of the pending list as we can */
+ rc = efct_hw_cmd_submit_pending(hw);
+
+ spin_unlock_irqrestore(&hw->cmd_lock, flags);
+ }
+
+ return rc;
+}
+
+static int
+efct_hw_command_process(struct efct_hw *hw, int status, u8 *mqe,
+ size_t size)
+{
+ struct efct_command_ctx *ctx = NULL;
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&hw->cmd_lock, flags);
+ if (!list_empty(&hw->cmd_head)) {
+ ctx = list_first_entry(&hw->cmd_head,
+ struct efct_command_ctx, list_entry);
+ list_del_init(&ctx->list_entry);
+ }
+ if (!ctx) {
+ efc_log_err(hw->os, "no command context\n");
+ spin_unlock_irqrestore(&hw->cmd_lock, flags);
+ return -EIO;
+ }
+
+ hw->cmd_head_count--;
+
+ /* Post any pending requests */
+ efct_hw_cmd_submit_pending(hw);
+
+ spin_unlock_irqrestore(&hw->cmd_lock, flags);
+
+ if (ctx->cb) {
+ memcpy(ctx->buf, mqe, size);
+ ctx->cb(hw, status, ctx->buf, ctx->arg);
+ }
+
+ mempool_free(ctx, hw->cmd_ctx_pool);
+
+ return 0;
+}
+
+static int
+efct_hw_mq_process(struct efct_hw *hw,
+ int status, struct sli4_queue *mq)
+{
+ u8 mqe[SLI4_BMBX_SIZE];
+ int rc;
+
+ rc = sli_mq_read(&hw->sli, mq, mqe);
+ if (!rc)
+ rc = efct_hw_command_process(hw, status, mqe, mq->size);
+
+ return rc;
+}
+
+static int
+efct_hw_command_cancel(struct efct_hw *hw)
+{
+ unsigned long flags = 0;
+ int rc = 0;
+
+ spin_lock_irqsave(&hw->cmd_lock, flags);
+
+ /*
+ * Manually clean up remaining commands. Note: since this calls
+ * efct_hw_command_process(), we'll also process the cmd_pending
+ * list, so no need to manually clean that out.
+ */
+ while (!list_empty(&hw->cmd_head)) {
+ u8 mqe[SLI4_BMBX_SIZE] = { 0 };
+ struct efct_command_ctx *ctx;
+
+ ctx = list_first_entry(&hw->cmd_head,
+ struct efct_command_ctx, list_entry);
+
+ efc_log_debug(hw->os, "hung command %08x\n",
+ !ctx ? U32_MAX : *((u32 *)ctx->buf));
+ spin_unlock_irqrestore(&hw->cmd_lock, flags);
+ rc = efct_hw_command_process(hw, -1, mqe, SLI4_BMBX_SIZE);
+ spin_lock_irqsave(&hw->cmd_lock, flags);
+ }
+
+ spin_unlock_irqrestore(&hw->cmd_lock, flags);
+
+ return rc;
+}
+
+static void
+efct_mbox_rsp_cb(struct efct_hw *hw, int status, u8 *mqe, void *arg)
+{
+ struct efct_mbox_rqst_ctx *ctx = arg;
+
+ if (ctx) {
+ if (ctx->callback)
+ (*ctx->callback)(hw->os->efcport, status, mqe,
+ ctx->arg);
+
+ mempool_free(ctx, hw->mbox_rqst_pool);
+ }
+}
+
+int
+efct_issue_mbox_rqst(void *base, void *cmd, void *cb, void *arg)
+{
+ struct efct_mbox_rqst_ctx *ctx;
+ struct efct *efct = base;
+ struct efct_hw *hw = &efct->hw;
+ int rc;
+
+ /*
+ * Allocate a callback context (which includes the mbox cmd buffer),
+ * we need this to be persistent as the mbox cmd submission may be
+ * queued and executed later execution.
+ */
+ ctx = mempool_alloc(hw->mbox_rqst_pool, GFP_ATOMIC);
+ if (!ctx)
+ return -EIO;
+
+ ctx->callback = cb;
+ ctx->arg = arg;
+
+ rc = efct_hw_command(hw, cmd, EFCT_CMD_NOWAIT, efct_mbox_rsp_cb, ctx);
+ if (rc) {
+ efc_log_err(efct, "issue mbox rqst failure rc:%d\n", rc);
+ mempool_free(ctx, hw->mbox_rqst_pool);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static inline struct efct_hw_io *
+_efct_hw_io_alloc(struct efct_hw *hw)
+{
+ struct efct_hw_io *io = NULL;
+
+ if (!list_empty(&hw->io_free)) {
+ io = list_first_entry(&hw->io_free, struct efct_hw_io,
+ list_entry);
+ list_del(&io->list_entry);
+ }
+ if (io) {
+ INIT_LIST_HEAD(&io->list_entry);
+ list_add_tail(&io->list_entry, &hw->io_inuse);
+ io->state = EFCT_HW_IO_STATE_INUSE;
+ io->abort_reqtag = U32_MAX;
+ io->wq = hw->wq_cpu_array[raw_smp_processor_id()];
+ if (!io->wq) {
+ efc_log_err(hw->os, "WQ not assigned for cpu:%d\n",
+ raw_smp_processor_id());
+ io->wq = hw->hw_wq[0];
+ }
+ kref_init(&io->ref);
+ io->release = efct_hw_io_free_internal;
+ } else {
+ atomic_add(1, &hw->io_alloc_failed_count);
+ }
+
+ return io;
+}
+
+struct efct_hw_io *
+efct_hw_io_alloc(struct efct_hw *hw)
+{
+ struct efct_hw_io *io = NULL;
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&hw->io_lock, flags);
+ io = _efct_hw_io_alloc(hw);
+ spin_unlock_irqrestore(&hw->io_lock, flags);
+
+ return io;
+}
+
+static void
+efct_hw_io_free_move_correct_list(struct efct_hw *hw,
+ struct efct_hw_io *io)
+{
+ /*
+ * When an IO is freed, depending on the exchange busy flag,
+ * move it to the correct list.
+ */
+ if (io->xbusy) {
+ /*
+ * add to wait_free list and wait for XRI_ABORTED CQEs to clean
+ * up
+ */
+ INIT_LIST_HEAD(&io->list_entry);
+ list_add_tail(&io->list_entry, &hw->io_wait_free);
+ io->state = EFCT_HW_IO_STATE_WAIT_FREE;
+ } else {
+ /* IO not busy, add to free list */
+ INIT_LIST_HEAD(&io->list_entry);
+ list_add_tail(&io->list_entry, &hw->io_free);
+ io->state = EFCT_HW_IO_STATE_FREE;
+ }
+}
+
+static inline void
+efct_hw_io_free_common(struct efct_hw *hw, struct efct_hw_io *io)
+{
+ /* initialize IO fields */
+ efct_hw_init_free_io(io);
+
+ /* Restore default SGL */
+ efct_hw_io_restore_sgl(hw, io);
+}
+
+void
+efct_hw_io_free_internal(struct kref *arg)
+{
+ unsigned long flags = 0;
+ struct efct_hw_io *io = container_of(arg, struct efct_hw_io, ref);
+ struct efct_hw *hw = io->hw;
+
+ /* perform common cleanup */
+ efct_hw_io_free_common(hw, io);
+
+ spin_lock_irqsave(&hw->io_lock, flags);
+ /* remove from in-use list */
+ if (!list_empty(&io->list_entry) && !list_empty(&hw->io_inuse)) {
+ list_del_init(&io->list_entry);
+ efct_hw_io_free_move_correct_list(hw, io);
+ }
+ spin_unlock_irqrestore(&hw->io_lock, flags);
+}
+
+int
+efct_hw_io_free(struct efct_hw *hw, struct efct_hw_io *io)
+{
+ return kref_put(&io->ref, io->release);
+}
+
+struct efct_hw_io *
+efct_hw_io_lookup(struct efct_hw *hw, u32 xri)
+{
+ u32 ioindex;
+
+ ioindex = xri - hw->sli.ext[SLI4_RSRC_XRI].base[0];
+ return hw->io[ioindex];
+}
+
+int
+efct_hw_io_init_sges(struct efct_hw *hw, struct efct_hw_io *io,
+ enum efct_hw_io_type type)
+{
+ struct sli4_sge *data = NULL;
+ u32 i = 0;
+ u32 skips = 0;
+ u32 sge_flags = 0;
+
+ if (!io) {
+ efc_log_err(hw->os, "bad parameter hw=%p io=%p\n", hw, io);
+ return -EIO;
+ }
+
+ /* Clear / reset the scatter-gather list */
+ io->sgl = &io->def_sgl;
+ io->sgl_count = io->def_sgl_count;
+ io->first_data_sge = 0;
+
+ memset(io->sgl->virt, 0, 2 * sizeof(struct sli4_sge));
+ io->n_sge = 0;
+ io->sge_offset = 0;
+
+ io->type = type;
+
+ data = io->sgl->virt;
+
+ /*
+ * Some IO types have underlying hardware requirements on the order
+ * of SGEs. Process all special entries here.
+ */
+ switch (type) {
+ case EFCT_HW_IO_TARGET_WRITE:
+
+ /* populate host resident XFER_RDY buffer */
+ sge_flags = le32_to_cpu(data->dw2_flags);
+ sge_flags &= (~SLI4_SGE_TYPE_MASK);
+ sge_flags |= (SLI4_SGE_TYPE_DATA << SLI4_SGE_TYPE_SHIFT);
+ data->buffer_address_high =
+ cpu_to_le32(upper_32_bits(io->xfer_rdy.phys));
+ data->buffer_address_low =
+ cpu_to_le32(lower_32_bits(io->xfer_rdy.phys));
+ data->buffer_length = cpu_to_le32(io->xfer_rdy.size);
+ data->dw2_flags = cpu_to_le32(sge_flags);
+ data++;
+
+ skips = EFCT_TARGET_WRITE_SKIPS;
+
+ io->n_sge = 1;
+ break;
+ case EFCT_HW_IO_TARGET_READ:
+ /*
+ * For FCP_TSEND64, the first 2 entries are SKIP SGE's
+ */
+ skips = EFCT_TARGET_READ_SKIPS;
+ break;
+ case EFCT_HW_IO_TARGET_RSP:
+ /*
+ * No skips, etc. for FCP_TRSP64
+ */
+ break;
+ default:
+ efc_log_err(hw->os, "unsupported IO type %#x\n", type);
+ return -EIO;
+ }
+
+ /*
+ * Write skip entries
+ */
+ for (i = 0; i < skips; i++) {
+ sge_flags = le32_to_cpu(data->dw2_flags);
+ sge_flags &= (~SLI4_SGE_TYPE_MASK);
+ sge_flags |= (SLI4_SGE_TYPE_SKIP << SLI4_SGE_TYPE_SHIFT);
+ data->dw2_flags = cpu_to_le32(sge_flags);
+ data++;
+ }
+
+ io->n_sge += skips;
+
+ /*
+ * Set last
+ */
+ sge_flags = le32_to_cpu(data->dw2_flags);
+ sge_flags |= SLI4_SGE_LAST;
+ data->dw2_flags = cpu_to_le32(sge_flags);
+
+ return 0;
+}
+
+int
+efct_hw_io_add_sge(struct efct_hw *hw, struct efct_hw_io *io,
+ uintptr_t addr, u32 length)
+{
+ struct sli4_sge *data = NULL;
+ u32 sge_flags = 0;
+
+ if (!io || !addr || !length) {
+ efc_log_err(hw->os,
+ "bad parameter hw=%p io=%p addr=%lx length=%u\n",
+ hw, io, addr, length);
+ return -EIO;
+ }
+
+ if (length > hw->sli.sge_supported_length) {
+ efc_log_err(hw->os,
+ "length of SGE %d bigger than allowed %d\n",
+ length, hw->sli.sge_supported_length);
+ return -EIO;
+ }
+
+ data = io->sgl->virt;
+ data += io->n_sge;
+
+ sge_flags = le32_to_cpu(data->dw2_flags);
+ sge_flags &= ~SLI4_SGE_TYPE_MASK;
+ sge_flags |= SLI4_SGE_TYPE_DATA << SLI4_SGE_TYPE_SHIFT;
+ sge_flags &= ~SLI4_SGE_DATA_OFFSET_MASK;
+ sge_flags |= SLI4_SGE_DATA_OFFSET_MASK & io->sge_offset;
+
+ data->buffer_address_high = cpu_to_le32(upper_32_bits(addr));
+ data->buffer_address_low = cpu_to_le32(lower_32_bits(addr));
+ data->buffer_length = cpu_to_le32(length);
+
+ /*
+ * Always assume this is the last entry and mark as such.
+ * If this is not the first entry unset the "last SGE"
+ * indication for the previous entry
+ */
+ sge_flags |= SLI4_SGE_LAST;
+ data->dw2_flags = cpu_to_le32(sge_flags);
+
+ if (io->n_sge) {
+ sge_flags = le32_to_cpu(data[-1].dw2_flags);
+ sge_flags &= ~SLI4_SGE_LAST;
+ data[-1].dw2_flags = cpu_to_le32(sge_flags);
+ }
+
+ /* Set first_data_bde if not previously set */
+ if (io->first_data_sge == 0)
+ io->first_data_sge = io->n_sge;
+
+ io->sge_offset += length;
+ io->n_sge++;
+
+ return 0;
+}
+
+void
+efct_hw_io_abort_all(struct efct_hw *hw)
+{
+ struct efct_hw_io *io_to_abort = NULL;
+ struct efct_hw_io *next_io = NULL;
+
+ list_for_each_entry_safe(io_to_abort, next_io,
+ &hw->io_inuse, list_entry) {
+ efct_hw_io_abort(hw, io_to_abort, true, NULL, NULL);
+ }
+}
+
+static void
+efct_hw_wq_process_abort(void *arg, u8 *cqe, int status)
+{
+ struct efct_hw_io *io = arg;
+ struct efct_hw *hw = io->hw;
+ u32 ext = 0;
+ u32 len = 0;
+ struct hw_wq_callback *wqcb;
+
+ /*
+ * For IOs that were aborted internally, we may need to issue the
+ * callback here depending on whether a XRI_ABORTED CQE is expected ot
+ * not. If the status is Local Reject/No XRI, then
+ * issue the callback now.
+ */
+ ext = sli_fc_ext_status(&hw->sli, cqe);
+ if (status == SLI4_FC_WCQE_STATUS_LOCAL_REJECT &&
+ ext == SLI4_FC_LOCAL_REJECT_NO_XRI && io->done) {
+ efct_hw_done_t done = io->done;
+
+ io->done = NULL;
+
+ /*
+ * Use latched status as this is always saved for an internal
+ * abort Note: We won't have both a done and abort_done
+ * function, so don't worry about
+ * clobbering the len, status and ext fields.
+ */
+ status = io->saved_status;
+ len = io->saved_len;
+ ext = io->saved_ext;
+ io->status_saved = false;
+ done(io, len, status, ext, io->arg);
+ }
+
+ if (io->abort_done) {
+ efct_hw_done_t done = io->abort_done;
+
+ io->abort_done = NULL;
+ done(io, len, status, ext, io->abort_arg);
+ }
+
+ /* clear abort bit to indicate abort is complete */
+ io->abort_in_progress = false;
+
+ /* Free the WQ callback */
+ if (io->abort_reqtag == U32_MAX) {
+ efc_log_err(hw->os, "HW IO already freed\n");
+ return;
+ }
+
+ wqcb = efct_hw_reqtag_get_instance(hw, io->abort_reqtag);
+ efct_hw_reqtag_free(hw, wqcb);
+
+ /*
+ * Call efct_hw_io_free() because this releases the WQ reservation as
+ * well as doing the refcount put. Don't duplicate the code here.
+ */
+ (void)efct_hw_io_free(hw, io);
+}
+
+static void
+efct_hw_fill_abort_wqe(struct efct_hw *hw, struct efct_hw_wqe *wqe)
+{
+ struct sli4_abort_wqe *abort = (void *)wqe->wqebuf;
+
+ memset(abort, 0, hw->sli.wqe_size);
+
+ abort->criteria = SLI4_ABORT_CRITERIA_XRI_TAG;
+ abort->ia_ir_byte |= wqe->send_abts ? 0 : 1;
+
+ /* Suppress ABTS retries */
+ abort->ia_ir_byte |= SLI4_ABRT_WQE_IR;
+
+ abort->t_tag = cpu_to_le32(wqe->id);
+ abort->command = SLI4_WQE_ABORT;
+ abort->request_tag = cpu_to_le16(wqe->abort_reqtag);
+
+ abort->dw10w0_flags = cpu_to_le16(SLI4_ABRT_WQE_QOSD);
+
+ abort->cq_id = cpu_to_le16(SLI4_CQ_DEFAULT);
+}
+
+int
+efct_hw_io_abort(struct efct_hw *hw, struct efct_hw_io *io_to_abort,
+ bool send_abts, void *cb, void *arg)
+{
+ struct hw_wq_callback *wqcb;
+ unsigned long flags = 0;
+
+ if (!io_to_abort) {
+ efc_log_err(hw->os, "bad parameter hw=%p io=%p\n",
+ hw, io_to_abort);
+ return -EIO;
+ }
+
+ if (hw->state != EFCT_HW_STATE_ACTIVE) {
+ efc_log_err(hw->os, "cannot send IO abort, HW state=%d\n",
+ hw->state);
+ return -EIO;
+ }
+
+ /* take a reference on IO being aborted */
+ if (kref_get_unless_zero(&io_to_abort->ref) == 0) {
+ /* command no longer active */
+ efc_log_debug(hw->os,
+ "io not active xri=0x%x tag=0x%x\n",
+ io_to_abort->indicator, io_to_abort->reqtag);
+ return -ENOENT;
+ }
+
+ /* Must have a valid WQ reference */
+ if (!io_to_abort->wq) {
+ efc_log_debug(hw->os, "io_to_abort xri=0x%x not active on WQ\n",
+ io_to_abort->indicator);
+ /* efct_ref_get(): same function */
+ kref_put(&io_to_abort->ref, io_to_abort->release);
+ return -ENOENT;
+ }
+
+ /*
+ * Validation checks complete; now check to see if already being
+ * aborted, if not set the flag.
+ */
+ if (cmpxchg(&io_to_abort->abort_in_progress, false, true)) {
+ /* efct_ref_get(): same function */
+ kref_put(&io_to_abort->ref, io_to_abort->release);
+ efc_log_debug(hw->os,
+ "io already being aborted xri=0x%x tag=0x%x\n",
+ io_to_abort->indicator, io_to_abort->reqtag);
+ return -EINPROGRESS;
+ }
+
+ /*
+ * If we got here, the possibilities are:
+ * - host owned xri
+ * - io_to_abort->wq_index != U32_MAX
+ * - submit ABORT_WQE to same WQ
+ * - port owned xri:
+ * - rxri: io_to_abort->wq_index == U32_MAX
+ * - submit ABORT_WQE to any WQ
+ * - non-rxri
+ * - io_to_abort->index != U32_MAX
+ * - submit ABORT_WQE to same WQ
+ * - io_to_abort->index == U32_MAX
+ * - submit ABORT_WQE to any WQ
+ */
+ io_to_abort->abort_done = cb;
+ io_to_abort->abort_arg = arg;
+
+ /* Allocate a request tag for the abort portion of this IO */
+ wqcb = efct_hw_reqtag_alloc(hw, efct_hw_wq_process_abort, io_to_abort);
+ if (!wqcb) {
+ efc_log_err(hw->os, "can't allocate request tag\n");
+ return -ENOSPC;
+ }
+
+ io_to_abort->abort_reqtag = wqcb->instance_index;
+ io_to_abort->wqe.send_abts = send_abts;
+ io_to_abort->wqe.id = io_to_abort->indicator;
+ io_to_abort->wqe.abort_reqtag = io_to_abort->abort_reqtag;
+
+ /*
+ * If the wqe is on the pending list, then set this wqe to be
+ * aborted when the IO's wqe is removed from the list.
+ */
+ if (io_to_abort->wq) {
+ spin_lock_irqsave(&io_to_abort->wq->queue->lock, flags);
+ if (io_to_abort->wqe.list_entry.next) {
+ io_to_abort->wqe.abort_wqe_submit_needed = true;
+ spin_unlock_irqrestore(&io_to_abort->wq->queue->lock,
+ flags);
+ return 0;
+ }
+ spin_unlock_irqrestore(&io_to_abort->wq->queue->lock, flags);
+ }
+
+ efct_hw_fill_abort_wqe(hw, &io_to_abort->wqe);
+
+ /* ABORT_WQE does not actually utilize an XRI on the Port,
+ * therefore, keep xbusy as-is to track the exchange's state,
+ * not the ABORT_WQE's state
+ */
+ if (efct_hw_wq_write(io_to_abort->wq, &io_to_abort->wqe)) {
+ io_to_abort->abort_in_progress = false;
+ /* efct_ref_get(): same function */
+ kref_put(&io_to_abort->ref, io_to_abort->release);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+void
+efct_hw_reqtag_pool_free(struct efct_hw *hw)
+{
+ u32 i;
+ struct reqtag_pool *reqtag_pool = hw->wq_reqtag_pool;
+ struct hw_wq_callback *wqcb = NULL;
+
+ if (reqtag_pool) {
+ for (i = 0; i < U16_MAX; i++) {
+ wqcb = reqtag_pool->tags[i];
+ if (!wqcb)
+ continue;
+
+ kfree(wqcb);
+ }
+ kfree(reqtag_pool);
+ hw->wq_reqtag_pool = NULL;
+ }
+}
+
+struct reqtag_pool *
+efct_hw_reqtag_pool_alloc(struct efct_hw *hw)
+{
+ u32 i = 0;
+ struct reqtag_pool *reqtag_pool;
+ struct hw_wq_callback *wqcb;
+
+ reqtag_pool = kzalloc(sizeof(*reqtag_pool), GFP_KERNEL);
+ if (!reqtag_pool)
+ return NULL;
+
+ INIT_LIST_HEAD(&reqtag_pool->freelist);
+ /* initialize reqtag pool lock */
+ spin_lock_init(&reqtag_pool->lock);
+ for (i = 0; i < U16_MAX; i++) {
+ wqcb = kmalloc(sizeof(*wqcb), GFP_KERNEL);
+ if (!wqcb)
+ break;
+
+ reqtag_pool->tags[i] = wqcb;
+ wqcb->instance_index = i;
+ wqcb->callback = NULL;
+ wqcb->arg = NULL;
+ INIT_LIST_HEAD(&wqcb->list_entry);
+ list_add_tail(&wqcb->list_entry, &reqtag_pool->freelist);
+ }
+
+ return reqtag_pool;
+}
+
+struct hw_wq_callback *
+efct_hw_reqtag_alloc(struct efct_hw *hw,
+ void (*callback)(void *arg, u8 *cqe, int status),
+ void *arg)
+{
+ struct hw_wq_callback *wqcb = NULL;
+ struct reqtag_pool *reqtag_pool = hw->wq_reqtag_pool;
+ unsigned long flags = 0;
+
+ if (!callback)
+ return wqcb;
+
+ spin_lock_irqsave(&reqtag_pool->lock, flags);
+
+ if (!list_empty(&reqtag_pool->freelist)) {
+ wqcb = list_first_entry(&reqtag_pool->freelist,
+ struct hw_wq_callback, list_entry);
+ }
+
+ if (wqcb) {
+ list_del_init(&wqcb->list_entry);
+ spin_unlock_irqrestore(&reqtag_pool->lock, flags);
+ wqcb->callback = callback;
+ wqcb->arg = arg;
+ } else {
+ spin_unlock_irqrestore(&reqtag_pool->lock, flags);
+ }
+
+ return wqcb;
+}
+
+void
+efct_hw_reqtag_free(struct efct_hw *hw, struct hw_wq_callback *wqcb)
+{
+ unsigned long flags = 0;
+ struct reqtag_pool *reqtag_pool = hw->wq_reqtag_pool;
+
+ if (!wqcb->callback)
+ efc_log_err(hw->os, "WQCB is already freed\n");
+
+ spin_lock_irqsave(&reqtag_pool->lock, flags);
+ wqcb->callback = NULL;
+ wqcb->arg = NULL;
+ INIT_LIST_HEAD(&wqcb->list_entry);
+ list_add(&wqcb->list_entry, &hw->wq_reqtag_pool->freelist);
+ spin_unlock_irqrestore(&reqtag_pool->lock, flags);
+}
+
+struct hw_wq_callback *
+efct_hw_reqtag_get_instance(struct efct_hw *hw, u32 instance_index)
+{
+ struct hw_wq_callback *wqcb;
+
+ wqcb = hw->wq_reqtag_pool->tags[instance_index];
+ if (!wqcb)
+ efc_log_err(hw->os, "wqcb for instance %d is null\n",
+ instance_index);
+
+ return wqcb;
+}
+
+int
+efct_hw_queue_hash_find(struct efct_queue_hash *hash, u16 id)
+{
+ int index = -1;
+ int i = id & (EFCT_HW_Q_HASH_SIZE - 1);
+
+ /*
+ * Since the hash is always bigger than the maximum number of Qs, then
+ * we never have to worry about an infinite loop. We will always find
+ * an unused entry.
+ */
+ do {
+ if (hash[i].in_use && hash[i].id == id)
+ index = hash[i].index;
+ else
+ i = (i + 1) & (EFCT_HW_Q_HASH_SIZE - 1);
+ } while (index == -1 && hash[i].in_use);
+
+ return index;
+}
+
+int
+efct_hw_process(struct efct_hw *hw, u32 vector,
+ u32 max_isr_time_msec)
+{
+ struct hw_eq *eq;
+
+ /*
+ * The caller should disable interrupts if they wish to prevent us
+ * from processing during a shutdown. The following states are defined:
+ * EFCT_HW_STATE_UNINITIALIZED - No queues allocated
+ * EFCT_HW_STATE_QUEUES_ALLOCATED - The state after a chip reset,
+ * queues are cleared.
+ * EFCT_HW_STATE_ACTIVE - Chip and queues are operational
+ * EFCT_HW_STATE_RESET_IN_PROGRESS - reset, we still want completions
+ * EFCT_HW_STATE_TEARDOWN_IN_PROGRESS - We still want mailbox
+ * completions.
+ */
+ if (hw->state == EFCT_HW_STATE_UNINITIALIZED)
+ return 0;
+
+ /* Get pointer to struct hw_eq */
+ eq = hw->hw_eq[vector];
+ if (!eq)
+ return 0;
+
+ eq->use_count++;
+
+ return efct_hw_eq_process(hw, eq, max_isr_time_msec);
+}
+
+int
+efct_hw_eq_process(struct efct_hw *hw, struct hw_eq *eq,
+ u32 max_isr_time_msec)
+{
+ u8 eqe[sizeof(struct sli4_eqe)] = { 0 };
+ u32 tcheck_count;
+ u64 tstart;
+ u64 telapsed;
+ bool done = false;
+
+ tcheck_count = EFCT_HW_TIMECHECK_ITERATIONS;
+ tstart = jiffies_to_msecs(jiffies);
+
+ while (!done && !sli_eq_read(&hw->sli, eq->queue, eqe)) {
+ u16 cq_id = 0;
+ int rc;
+
+ rc = sli_eq_parse(&hw->sli, eqe, &cq_id);
+ if (unlikely(rc)) {
+ if (rc == SLI4_EQE_STATUS_EQ_FULL) {
+ u32 i;
+
+ /*
+ * Received a sentinel EQE indicating the
+ * EQ is full. Process all CQs
+ */
+ for (i = 0; i < hw->cq_count; i++)
+ efct_hw_cq_process(hw, hw->hw_cq[i]);
+ continue;
+ } else {
+ return rc;
+ }
+ } else {
+ int index;
+
+ index = efct_hw_queue_hash_find(hw->cq_hash, cq_id);
+
+ if (likely(index >= 0))
+ efct_hw_cq_process(hw, hw->hw_cq[index]);
+ else
+ efc_log_err(hw->os, "bad CQ_ID %#06x\n", cq_id);
+ }
+
+ if (eq->queue->n_posted > eq->queue->posted_limit)
+ sli_queue_arm(&hw->sli, eq->queue, false);
+
+ if (tcheck_count && (--tcheck_count == 0)) {
+ tcheck_count = EFCT_HW_TIMECHECK_ITERATIONS;
+ telapsed = jiffies_to_msecs(jiffies) - tstart;
+ if (telapsed >= max_isr_time_msec)
+ done = true;
+ }
+ }
+ sli_queue_eq_arm(&hw->sli, eq->queue, true);
+
+ return 0;
+}
+
+static int
+_efct_hw_wq_write(struct hw_wq *wq, struct efct_hw_wqe *wqe)
+{
+ int queue_rc;
+
+ /* Every so often, set the wqec bit to generate comsummed completions */
+ if (wq->wqec_count)
+ wq->wqec_count--;
+
+ if (wq->wqec_count == 0) {
+ struct sli4_generic_wqe *genwqe = (void *)wqe->wqebuf;
+
+ genwqe->cmdtype_wqec_byte |= SLI4_GEN_WQE_WQEC;
+ wq->wqec_count = wq->wqec_set_count;
+ }
+
+ /* Decrement WQ free count */
+ wq->free_count--;
+
+ queue_rc = sli_wq_write(&wq->hw->sli, wq->queue, wqe->wqebuf);
+
+ return (queue_rc < 0) ? -EIO : 0;
+}
+
+static void
+hw_wq_submit_pending(struct hw_wq *wq, u32 update_free_count)
+{
+ struct efct_hw_wqe *wqe;
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&wq->queue->lock, flags);
+
+ /* Update free count with value passed in */
+ wq->free_count += update_free_count;
+
+ while ((wq->free_count > 0) && (!list_empty(&wq->pending_list))) {
+ wqe = list_first_entry(&wq->pending_list,
+ struct efct_hw_wqe, list_entry);
+ list_del_init(&wqe->list_entry);
+ _efct_hw_wq_write(wq, wqe);
+
+ if (wqe->abort_wqe_submit_needed) {
+ wqe->abort_wqe_submit_needed = false;
+ efct_hw_fill_abort_wqe(wq->hw, wqe);
+ INIT_LIST_HEAD(&wqe->list_entry);
+ list_add_tail(&wqe->list_entry, &wq->pending_list);
+ wq->wq_pending_count++;
+ }
+ }
+
+ spin_unlock_irqrestore(&wq->queue->lock, flags);
+}
+
+void
+efct_hw_cq_process(struct efct_hw *hw, struct hw_cq *cq)
+{
+ u8 cqe[sizeof(struct sli4_mcqe)];
+ u16 rid = U16_MAX;
+ /* completion type */
+ enum sli4_qentry ctype;
+ u32 n_processed = 0;
+ u32 tstart, telapsed;
+
+ tstart = jiffies_to_msecs(jiffies);
+
+ while (!sli_cq_read(&hw->sli, cq->queue, cqe)) {
+ int status;
+
+ status = sli_cq_parse(&hw->sli, cq->queue, cqe, &ctype, &rid);
+ /*
+ * The sign of status is significant. If status is:
+ * == 0 : call completed correctly and
+ * the CQE indicated success
+ * > 0 : call completed correctly and
+ * the CQE indicated an error
+ * < 0 : call failed and no information is available about the
+ * CQE
+ */
+ if (status < 0) {
+ if (status == SLI4_MCQE_STATUS_NOT_COMPLETED)
+ /*
+ * Notification that an entry was consumed,
+ * but not completed
+ */
+ continue;
+
+ break;
+ }
+
+ switch (ctype) {
+ case SLI4_QENTRY_ASYNC:
+ sli_cqe_async(&hw->sli, cqe);
+ break;
+ case SLI4_QENTRY_MQ:
+ /*
+ * Process MQ entry. Note there is no way to determine
+ * the MQ_ID from the completion entry.
+ */
+ efct_hw_mq_process(hw, status, hw->mq);
+ break;
+ case SLI4_QENTRY_WQ:
+ efct_hw_wq_process(hw, cq, cqe, status, rid);
+ break;
+ case SLI4_QENTRY_WQ_RELEASE: {
+ u32 wq_id = rid;
+ int index;
+ struct hw_wq *wq = NULL;
+
+ index = efct_hw_queue_hash_find(hw->wq_hash, wq_id);
+
+ if (likely(index >= 0)) {
+ wq = hw->hw_wq[index];
+ } else {
+ efc_log_err(hw->os, "bad WQ_ID %#06x\n", wq_id);
+ break;
+ }
+ /* Submit any HW IOs that are on the WQ pending list */
+ hw_wq_submit_pending(wq, wq->wqec_set_count);
+
+ break;
+ }
+
+ case SLI4_QENTRY_RQ:
+ efct_hw_rqpair_process_rq(hw, cq, cqe);
+ break;
+ case SLI4_QENTRY_XABT: {
+ efct_hw_xabt_process(hw, cq, cqe, rid);
+ break;
+ }
+ default:
+ efc_log_debug(hw->os, "unhandled ctype=%#x rid=%#x\n",
+ ctype, rid);
+ break;
+ }
+
+ n_processed++;
+ if (n_processed == cq->queue->proc_limit)
+ break;
+
+ if (cq->queue->n_posted >= cq->queue->posted_limit)
+ sli_queue_arm(&hw->sli, cq->queue, false);
+ }
+
+ sli_queue_arm(&hw->sli, cq->queue, true);
+
+ if (n_processed > cq->queue->max_num_processed)
+ cq->queue->max_num_processed = n_processed;
+ telapsed = jiffies_to_msecs(jiffies) - tstart;
+ if (telapsed > cq->queue->max_process_time)
+ cq->queue->max_process_time = telapsed;
+}
+
+void
+efct_hw_wq_process(struct efct_hw *hw, struct hw_cq *cq,
+ u8 *cqe, int status, u16 rid)
+{
+ struct hw_wq_callback *wqcb;
+
+ if (rid == EFCT_HW_REQUE_XRI_REGTAG) {
+ if (status)
+ efc_log_err(hw->os, "reque xri failed, status = %d\n",
+ status);
+ return;
+ }
+
+ wqcb = efct_hw_reqtag_get_instance(hw, rid);
+ if (!wqcb) {
+ efc_log_err(hw->os, "invalid request tag: x%x\n", rid);
+ return;
+ }
+
+ if (!wqcb->callback) {
+ efc_log_err(hw->os, "wqcb callback is NULL\n");
+ return;
+ }
+
+ (*wqcb->callback)(wqcb->arg, cqe, status);
+}
+
+void
+efct_hw_xabt_process(struct efct_hw *hw, struct hw_cq *cq,
+ u8 *cqe, u16 rid)
+{
+ /* search IOs wait free list */
+ struct efct_hw_io *io = NULL;
+ unsigned long flags = 0;
+
+ io = efct_hw_io_lookup(hw, rid);
+ if (!io) {
+ /* IO lookup failure should never happen */
+ efc_log_err(hw->os, "xabt io lookup failed rid=%#x\n", rid);
+ return;
+ }
+
+ if (!io->xbusy)
+ efc_log_debug(hw->os, "xabt io not busy rid=%#x\n", rid);
+ else
+ /* mark IO as no longer busy */
+ io->xbusy = false;
+
+ /*
+ * For IOs that were aborted internally, we need to issue any pending
+ * callback here.
+ */
+ if (io->done) {
+ efct_hw_done_t done = io->done;
+ void *arg = io->arg;
+
+ /*
+ * Use latched status as this is always saved for an internal
+ * abort
+ */
+ int status = io->saved_status;
+ u32 len = io->saved_len;
+ u32 ext = io->saved_ext;
+
+ io->done = NULL;
+ io->status_saved = false;
+
+ done(io, len, status, ext, arg);
+ }
+
+ spin_lock_irqsave(&hw->io_lock, flags);
+ if (io->state == EFCT_HW_IO_STATE_INUSE ||
+ io->state == EFCT_HW_IO_STATE_WAIT_FREE) {
+ /* if on wait_free list, caller has already freed IO;
+ * remove from wait_free list and add to free list.
+ * if on in-use list, already marked as no longer busy;
+ * just leave there and wait for caller to free.
+ */
+ if (io->state == EFCT_HW_IO_STATE_WAIT_FREE) {
+ io->state = EFCT_HW_IO_STATE_FREE;
+ list_del_init(&io->list_entry);
+ efct_hw_io_free_move_correct_list(hw, io);
+ }
+ }
+ spin_unlock_irqrestore(&hw->io_lock, flags);
+}
+
+static int
+efct_hw_flush(struct efct_hw *hw)
+{
+ u32 i = 0;
+
+ /* Process any remaining completions */
+ for (i = 0; i < hw->eq_count; i++)
+ efct_hw_process(hw, i, ~0);
+
+ return 0;
+}
+
+int
+efct_hw_wq_write(struct hw_wq *wq, struct efct_hw_wqe *wqe)
+{
+ int rc = 0;
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&wq->queue->lock, flags);
+ if (list_empty(&wq->pending_list)) {
+ if (wq->free_count > 0) {
+ rc = _efct_hw_wq_write(wq, wqe);
+ } else {
+ INIT_LIST_HEAD(&wqe->list_entry);
+ list_add_tail(&wqe->list_entry, &wq->pending_list);
+ wq->wq_pending_count++;
+ }
+
+ spin_unlock_irqrestore(&wq->queue->lock, flags);
+ return rc;
+ }
+
+ INIT_LIST_HEAD(&wqe->list_entry);
+ list_add_tail(&wqe->list_entry, &wq->pending_list);
+ wq->wq_pending_count++;
+ while (wq->free_count > 0) {
+ wqe = list_first_entry(&wq->pending_list, struct efct_hw_wqe,
+ list_entry);
+ if (!wqe)
+ break;
+
+ list_del_init(&wqe->list_entry);
+ rc = _efct_hw_wq_write(wq, wqe);
+ if (rc)
+ break;
+
+ if (wqe->abort_wqe_submit_needed) {
+ wqe->abort_wqe_submit_needed = false;
+ efct_hw_fill_abort_wqe(wq->hw, wqe);
+
+ INIT_LIST_HEAD(&wqe->list_entry);
+ list_add_tail(&wqe->list_entry, &wq->pending_list);
+ wq->wq_pending_count++;
+ }
+ }
+
+ spin_unlock_irqrestore(&wq->queue->lock, flags);
+
+ return rc;
+}
+
+int
+efct_efc_bls_send(struct efc *efc, u32 type, struct sli_bls_params *bls)
+{
+ struct efct *efct = efc->base;
+
+ return efct_hw_bls_send(efct, type, bls, NULL, NULL);
+}
+
+int
+efct_hw_bls_send(struct efct *efct, u32 type, struct sli_bls_params *bls_params,
+ void *cb, void *arg)
+{
+ struct efct_hw *hw = &efct->hw;
+ struct efct_hw_io *hio;
+ struct sli_bls_payload bls;
+ int rc;
+
+ if (hw->state != EFCT_HW_STATE_ACTIVE) {
+ efc_log_err(hw->os,
+ "cannot send BLS, HW state=%d\n", hw->state);
+ return -EIO;
+ }
+
+ hio = efct_hw_io_alloc(hw);
+ if (!hio) {
+ efc_log_err(hw->os, "HIO allocation failed\n");
+ return -EIO;
+ }
+
+ hio->done = cb;
+ hio->arg = arg;
+
+ bls_params->xri = hio->indicator;
+ bls_params->tag = hio->reqtag;
+
+ if (type == FC_RCTL_BA_ACC) {
+ hio->type = EFCT_HW_BLS_ACC;
+ bls.type = SLI4_SLI_BLS_ACC;
+ memcpy(&bls.u.acc, bls_params->payload, sizeof(bls.u.acc));
+ } else {
+ hio->type = EFCT_HW_BLS_RJT;
+ bls.type = SLI4_SLI_BLS_RJT;
+ memcpy(&bls.u.rjt, bls_params->payload, sizeof(bls.u.rjt));
+ }
+
+ bls.ox_id = cpu_to_le16(bls_params->ox_id);
+ bls.rx_id = cpu_to_le16(bls_params->rx_id);
+
+ if (sli_xmit_bls_rsp64_wqe(&hw->sli, hio->wqe.wqebuf,
+ &bls, bls_params)) {
+ efc_log_err(hw->os, "XMIT_BLS_RSP64 WQE error\n");
+ return -EIO;
+ }
+
+ hio->xbusy = true;
+
+ /*
+ * Add IO to active io wqe list before submitting, in case the
+ * wcqe processing preempts this thread.
+ */
+ hio->wq->use_count++;
+ rc = efct_hw_wq_write(hio->wq, &hio->wqe);
+ if (rc >= 0) {
+ /* non-negative return is success */
+ rc = 0;
+ } else {
+ /* failed to write wqe, remove from active wqe list */
+ efc_log_err(hw->os,
+ "sli_queue_write failed: %d\n", rc);
+ hio->xbusy = false;
+ }
+
+ return rc;
+}
+
+static int
+efct_els_ssrs_send_cb(struct efct_hw_io *hio, u32 length, int status,
+ u32 ext_status, void *arg)
+{
+ struct efc_disc_io *io = arg;
+
+ efc_disc_io_complete(io, length, status, ext_status);
+ return 0;
+}
+
+static inline void
+efct_fill_els_params(struct efc_disc_io *io, struct sli_els_params *params)
+{
+ u8 *cmd = io->req.virt;
+
+ params->cmd = *cmd;
+ params->s_id = io->s_id;
+ params->d_id = io->d_id;
+ params->ox_id = io->iparam.els.ox_id;
+ params->rpi = io->rpi;
+ params->vpi = io->vpi;
+ params->rpi_registered = io->rpi_registered;
+ params->xmit_len = io->xmit_len;
+ params->rsp_len = io->rsp_len;
+ params->timeout = io->iparam.els.timeout;
+}
+
+static inline void
+efct_fill_ct_params(struct efc_disc_io *io, struct sli_ct_params *params)
+{
+ params->r_ctl = io->iparam.ct.r_ctl;
+ params->type = io->iparam.ct.type;
+ params->df_ctl = io->iparam.ct.df_ctl;
+ params->d_id = io->d_id;
+ params->ox_id = io->iparam.ct.ox_id;
+ params->rpi = io->rpi;
+ params->vpi = io->vpi;
+ params->rpi_registered = io->rpi_registered;
+ params->xmit_len = io->xmit_len;
+ params->rsp_len = io->rsp_len;
+ params->timeout = io->iparam.ct.timeout;
+}
+
+/**
+ * efct_els_hw_srrs_send() - Send a single request and response cmd.
+ * @efc: efc library structure
+ * @io: Discovery IO used to hold els and ct cmd context.
+ *
+ * This routine supports communication sequences consisting of a single
+ * request and single response between two endpoints. Examples include:
+ * - Sending an ELS request.
+ * - Sending an ELS response - To send an ELS response, the caller must provide
+ * the OX_ID from the received request.
+ * - Sending a FC Common Transport (FC-CT) request - To send a FC-CT request,
+ * the caller must provide the R_CTL, TYPE, and DF_CTL
+ * values to place in the FC frame header.
+ *
+ * Return: Status of the request.
+ */
+int
+efct_els_hw_srrs_send(struct efc *efc, struct efc_disc_io *io)
+{
+ struct efct *efct = efc->base;
+ struct efct_hw_io *hio;
+ struct efct_hw *hw = &efct->hw;
+ struct efc_dma *send = &io->req;
+ struct efc_dma *receive = &io->rsp;
+ struct sli4_sge *sge = NULL;
+ int rc = 0;
+ u32 len = io->xmit_len;
+ u32 sge0_flags;
+ u32 sge1_flags;
+
+ hio = efct_hw_io_alloc(hw);
+ if (!hio) {
+ pr_err("HIO alloc failed\n");
+ return -EIO;
+ }
+
+ if (hw->state != EFCT_HW_STATE_ACTIVE) {
+ efc_log_debug(hw->os,
+ "cannot send SRRS, HW state=%d\n", hw->state);
+ return -EIO;
+ }
+
+ hio->done = efct_els_ssrs_send_cb;
+ hio->arg = io;
+
+ sge = hio->sgl->virt;
+
+ /* clear both SGE */
+ memset(hio->sgl->virt, 0, 2 * sizeof(struct sli4_sge));
+
+ sge0_flags = le32_to_cpu(sge[0].dw2_flags);
+ sge1_flags = le32_to_cpu(sge[1].dw2_flags);
+ if (send->size) {
+ sge[0].buffer_address_high =
+ cpu_to_le32(upper_32_bits(send->phys));
+ sge[0].buffer_address_low =
+ cpu_to_le32(lower_32_bits(send->phys));
+
+ sge0_flags |= (SLI4_SGE_TYPE_DATA << SLI4_SGE_TYPE_SHIFT);
+
+ sge[0].buffer_length = cpu_to_le32(len);
+ }
+
+ if (io->io_type == EFC_DISC_IO_ELS_REQ ||
+ io->io_type == EFC_DISC_IO_CT_REQ) {
+ sge[1].buffer_address_high =
+ cpu_to_le32(upper_32_bits(receive->phys));
+ sge[1].buffer_address_low =
+ cpu_to_le32(lower_32_bits(receive->phys));
+
+ sge1_flags |= (SLI4_SGE_TYPE_DATA << SLI4_SGE_TYPE_SHIFT);
+ sge1_flags |= SLI4_SGE_LAST;
+
+ sge[1].buffer_length = cpu_to_le32(receive->size);
+ } else {
+ sge0_flags |= SLI4_SGE_LAST;
+ }
+
+ sge[0].dw2_flags = cpu_to_le32(sge0_flags);
+ sge[1].dw2_flags = cpu_to_le32(sge1_flags);
+
+ switch (io->io_type) {
+ case EFC_DISC_IO_ELS_REQ: {
+ struct sli_els_params els_params;
+
+ hio->type = EFCT_HW_ELS_REQ;
+ efct_fill_els_params(io, &els_params);
+ els_params.xri = hio->indicator;
+ els_params.tag = hio->reqtag;
+
+ if (sli_els_request64_wqe(&hw->sli, hio->wqe.wqebuf, hio->sgl,
+ &els_params)) {
+ efc_log_err(hw->os, "REQ WQE error\n");
+ rc = -EIO;
+ }
+ break;
+ }
+ case EFC_DISC_IO_ELS_RESP: {
+ struct sli_els_params els_params;
+
+ hio->type = EFCT_HW_ELS_RSP;
+ efct_fill_els_params(io, &els_params);
+ els_params.xri = hio->indicator;
+ els_params.tag = hio->reqtag;
+ if (sli_xmit_els_rsp64_wqe(&hw->sli, hio->wqe.wqebuf, send,
+ &els_params)){
+ efc_log_err(hw->os, "RSP WQE error\n");
+ rc = -EIO;
+ }
+ break;
+ }
+ case EFC_DISC_IO_CT_REQ: {
+ struct sli_ct_params ct_params;
+
+ hio->type = EFCT_HW_FC_CT;
+ efct_fill_ct_params(io, &ct_params);
+ ct_params.xri = hio->indicator;
+ ct_params.tag = hio->reqtag;
+ if (sli_gen_request64_wqe(&hw->sli, hio->wqe.wqebuf, hio->sgl,
+ &ct_params)){
+ efc_log_err(hw->os, "GEN WQE error\n");
+ rc = -EIO;
+ }
+ break;
+ }
+ case EFC_DISC_IO_CT_RESP: {
+ struct sli_ct_params ct_params;
+
+ hio->type = EFCT_HW_FC_CT_RSP;
+ efct_fill_ct_params(io, &ct_params);
+ ct_params.xri = hio->indicator;
+ ct_params.tag = hio->reqtag;
+ if (sli_xmit_sequence64_wqe(&hw->sli, hio->wqe.wqebuf, hio->sgl,
+ &ct_params)){
+ efc_log_err(hw->os, "XMIT SEQ WQE error\n");
+ rc = -EIO;
+ }
+ break;
+ }
+ default:
+ efc_log_err(hw->os, "bad SRRS type %#x\n", io->io_type);
+ rc = -EIO;
+ }
+
+ if (rc == 0) {
+ hio->xbusy = true;
+
+ /*
+ * Add IO to active io wqe list before submitting, in case the
+ * wcqe processing preempts this thread.
+ */
+ hio->wq->use_count++;
+ rc = efct_hw_wq_write(hio->wq, &hio->wqe);
+ if (rc >= 0) {
+ /* non-negative return is success */
+ rc = 0;
+ } else {
+ /* failed to write wqe, remove from active wqe list */
+ efc_log_err(hw->os,
+ "sli_queue_write failed: %d\n", rc);
+ hio->xbusy = false;
+ }
+ }
+
+ return rc;
+}
+
+int
+efct_hw_io_send(struct efct_hw *hw, enum efct_hw_io_type type,
+ struct efct_hw_io *io, union efct_hw_io_param_u *iparam,
+ void *cb, void *arg)
+{
+ int rc = 0;
+ bool send_wqe = true;
+
+ if (!io) {
+ pr_err("bad parm hw=%p io=%p\n", hw, io);
+ return -EIO;
+ }
+
+ if (hw->state != EFCT_HW_STATE_ACTIVE) {
+ efc_log_err(hw->os, "cannot send IO, HW state=%d\n", hw->state);
+ return -EIO;
+ }
+
+ /*
+ * Save state needed during later stages
+ */
+ io->type = type;
+ io->done = cb;
+ io->arg = arg;
+
+ /*
+ * Format the work queue entry used to send the IO
+ */
+ switch (type) {
+ case EFCT_HW_IO_TARGET_WRITE: {
+ u16 *flags = &iparam->fcp_tgt.flags;
+ struct fcp_txrdy *xfer = io->xfer_rdy.virt;
+
+ /*
+ * Fill in the XFER_RDY for IF_TYPE 0 devices
+ */
+ xfer->ft_data_ro = cpu_to_be32(iparam->fcp_tgt.offset);
+ xfer->ft_burst_len = cpu_to_be32(iparam->fcp_tgt.xmit_len);
+
+ if (io->xbusy)
+ *flags |= SLI4_IO_CONTINUATION;
+ else
+ *flags &= ~SLI4_IO_CONTINUATION;
+ iparam->fcp_tgt.xri = io->indicator;
+ iparam->fcp_tgt.tag = io->reqtag;
+
+ if (sli_fcp_treceive64_wqe(&hw->sli, io->wqe.wqebuf,
+ &io->def_sgl, io->first_data_sge,
+ SLI4_CQ_DEFAULT,
+ 0, 0, &iparam->fcp_tgt)) {
+ efc_log_err(hw->os, "TRECEIVE WQE error\n");
+ rc = -EIO;
+ }
+ break;
+ }
+ case EFCT_HW_IO_TARGET_READ: {
+ u16 *flags = &iparam->fcp_tgt.flags;
+
+ if (io->xbusy)
+ *flags |= SLI4_IO_CONTINUATION;
+ else
+ *flags &= ~SLI4_IO_CONTINUATION;
+
+ iparam->fcp_tgt.xri = io->indicator;
+ iparam->fcp_tgt.tag = io->reqtag;
+
+ if (sli_fcp_tsend64_wqe(&hw->sli, io->wqe.wqebuf,
+ &io->def_sgl, io->first_data_sge,
+ SLI4_CQ_DEFAULT,
+ 0, 0, &iparam->fcp_tgt)) {
+ efc_log_err(hw->os, "TSEND WQE error\n");
+ rc = -EIO;
+ }
+ break;
+ }
+ case EFCT_HW_IO_TARGET_RSP: {
+ u16 *flags = &iparam->fcp_tgt.flags;
+
+ if (io->xbusy)
+ *flags |= SLI4_IO_CONTINUATION;
+ else
+ *flags &= ~SLI4_IO_CONTINUATION;
+
+ iparam->fcp_tgt.xri = io->indicator;
+ iparam->fcp_tgt.tag = io->reqtag;
+
+ if (sli_fcp_trsp64_wqe(&hw->sli, io->wqe.wqebuf,
+ &io->def_sgl, SLI4_CQ_DEFAULT,
+ 0, &iparam->fcp_tgt)) {
+ efc_log_err(hw->os, "TRSP WQE error\n");
+ rc = -EIO;
+ }
+
+ break;
+ }
+ default:
+ efc_log_err(hw->os, "unsupported IO type %#x\n", type);
+ rc = -EIO;
+ }
+
+ if (send_wqe && rc == 0) {
+ io->xbusy = true;
+
+ /*
+ * Add IO to active io wqe list before submitting, in case the
+ * wcqe processing preempts this thread.
+ */
+ hw->tcmd_wq_submit[io->wq->instance]++;
+ io->wq->use_count++;
+ rc = efct_hw_wq_write(io->wq, &io->wqe);
+ if (rc >= 0) {
+ /* non-negative return is success */
+ rc = 0;
+ } else {
+ /* failed to write wqe, remove from active wqe list */
+ efc_log_err(hw->os,
+ "sli_queue_write failed: %d\n", rc);
+ io->xbusy = false;
+ }
+ }
+
+ return rc;
+}
+
+int
+efct_hw_send_frame(struct efct_hw *hw, struct fc_frame_header *hdr,
+ u8 sof, u8 eof, struct efc_dma *payload,
+ struct efct_hw_send_frame_context *ctx,
+ void (*callback)(void *arg, u8 *cqe, int status),
+ void *arg)
+{
+ int rc;
+ struct efct_hw_wqe *wqe;
+ u32 xri;
+ struct hw_wq *wq;
+
+ wqe = &ctx->wqe;
+
+ /* populate the callback object */
+ ctx->hw = hw;
+
+ /* Fetch and populate request tag */
+ ctx->wqcb = efct_hw_reqtag_alloc(hw, callback, arg);
+ if (!ctx->wqcb) {
+ efc_log_err(hw->os, "can't allocate request tag\n");
+ return -ENOSPC;
+ }
+
+ wq = hw->hw_wq[0];
+
+ /* Set XRI and RX_ID in the header based on which WQ, and which
+ * send_frame_io we are using
+ */
+ xri = wq->send_frame_io->indicator;
+
+ /* Build the send frame WQE */
+ rc = sli_send_frame_wqe(&hw->sli, wqe->wqebuf,
+ sof, eof, (u32 *)hdr, payload, payload->len,
+ EFCT_HW_SEND_FRAME_TIMEOUT, xri,
+ ctx->wqcb->instance_index);
+ if (rc) {
+ efc_log_err(hw->os, "sli_send_frame_wqe failed: %d\n", rc);
+ return -EIO;
+ }
+
+ /* Write to WQ */
+ rc = efct_hw_wq_write(wq, wqe);
+ if (rc) {
+ efc_log_err(hw->os, "efct_hw_wq_write failed: %d\n", rc);
+ return -EIO;
+ }
+
+ wq->use_count++;
+
+ return 0;
+}
+
+static int
+efct_hw_cb_link_stat(struct efct_hw *hw, int status,
+ u8 *mqe, void *arg)
+{
+ struct sli4_cmd_read_link_stats *mbox_rsp;
+ struct efct_hw_link_stat_cb_arg *cb_arg = arg;
+ struct efct_hw_link_stat_counts counts[EFCT_HW_LINK_STAT_MAX];
+ u32 num_counters, i;
+ u32 mbox_rsp_flags = 0;
+
+ mbox_rsp = (struct sli4_cmd_read_link_stats *)mqe;
+ mbox_rsp_flags = le32_to_cpu(mbox_rsp->dw1_flags);
+ num_counters = (mbox_rsp_flags & SLI4_READ_LNKSTAT_GEC) ? 20 : 13;
+ memset(counts, 0, sizeof(struct efct_hw_link_stat_counts) *
+ EFCT_HW_LINK_STAT_MAX);
+
+ /* Fill overflow counts, mask starts from SLI4_READ_LNKSTAT_W02OF*/
+ for (i = 0; i < EFCT_HW_LINK_STAT_MAX; i++)
+ counts[i].overflow = (mbox_rsp_flags & (1 << (i + 2)));
+
+ counts[EFCT_HW_LINK_STAT_LINK_FAILURE_COUNT].counter =
+ le32_to_cpu(mbox_rsp->linkfail_errcnt);
+ counts[EFCT_HW_LINK_STAT_LOSS_OF_SYNC_COUNT].counter =
+ le32_to_cpu(mbox_rsp->losssync_errcnt);
+ counts[EFCT_HW_LINK_STAT_LOSS_OF_SIGNAL_COUNT].counter =
+ le32_to_cpu(mbox_rsp->losssignal_errcnt);
+ counts[EFCT_HW_LINK_STAT_PRIMITIVE_SEQ_COUNT].counter =
+ le32_to_cpu(mbox_rsp->primseq_errcnt);
+ counts[EFCT_HW_LINK_STAT_INVALID_XMIT_WORD_COUNT].counter =
+ le32_to_cpu(mbox_rsp->inval_txword_errcnt);
+ counts[EFCT_HW_LINK_STAT_CRC_COUNT].counter =
+ le32_to_cpu(mbox_rsp->crc_errcnt);
+ counts[EFCT_HW_LINK_STAT_PRIMITIVE_SEQ_TIMEOUT_COUNT].counter =
+ le32_to_cpu(mbox_rsp->primseq_eventtimeout_cnt);
+ counts[EFCT_HW_LINK_STAT_ELASTIC_BUFFER_OVERRUN_COUNT].counter =
+ le32_to_cpu(mbox_rsp->elastic_bufoverrun_errcnt);
+ counts[EFCT_HW_LINK_STAT_ARB_TIMEOUT_COUNT].counter =
+ le32_to_cpu(mbox_rsp->arbit_fc_al_timeout_cnt);
+ counts[EFCT_HW_LINK_STAT_ADVERTISED_RCV_B2B_CREDIT].counter =
+ le32_to_cpu(mbox_rsp->adv_rx_buftor_to_buf_credit);
+ counts[EFCT_HW_LINK_STAT_CURR_RCV_B2B_CREDIT].counter =
+ le32_to_cpu(mbox_rsp->curr_rx_buf_to_buf_credit);
+ counts[EFCT_HW_LINK_STAT_ADVERTISED_XMIT_B2B_CREDIT].counter =
+ le32_to_cpu(mbox_rsp->adv_tx_buf_to_buf_credit);
+ counts[EFCT_HW_LINK_STAT_CURR_XMIT_B2B_CREDIT].counter =
+ le32_to_cpu(mbox_rsp->curr_tx_buf_to_buf_credit);
+ counts[EFCT_HW_LINK_STAT_RCV_EOFA_COUNT].counter =
+ le32_to_cpu(mbox_rsp->rx_eofa_cnt);
+ counts[EFCT_HW_LINK_STAT_RCV_EOFDTI_COUNT].counter =
+ le32_to_cpu(mbox_rsp->rx_eofdti_cnt);
+ counts[EFCT_HW_LINK_STAT_RCV_EOFNI_COUNT].counter =
+ le32_to_cpu(mbox_rsp->rx_eofni_cnt);
+ counts[EFCT_HW_LINK_STAT_RCV_SOFF_COUNT].counter =
+ le32_to_cpu(mbox_rsp->rx_soff_cnt);
+ counts[EFCT_HW_LINK_STAT_RCV_DROPPED_NO_AER_COUNT].counter =
+ le32_to_cpu(mbox_rsp->rx_dropped_no_aer_cnt);
+ counts[EFCT_HW_LINK_STAT_RCV_DROPPED_NO_RPI_COUNT].counter =
+ le32_to_cpu(mbox_rsp->rx_dropped_no_avail_rpi_rescnt);
+ counts[EFCT_HW_LINK_STAT_RCV_DROPPED_NO_XRI_COUNT].counter =
+ le32_to_cpu(mbox_rsp->rx_dropped_no_avail_xri_rescnt);
+
+ if (cb_arg) {
+ if (cb_arg->cb) {
+ if (status == 0 && le16_to_cpu(mbox_rsp->hdr.status))
+ status = le16_to_cpu(mbox_rsp->hdr.status);
+ cb_arg->cb(status, num_counters, counts, cb_arg->arg);
+ }
+
+ kfree(cb_arg);
+ }
+
+ return 0;
+}
+
+int
+efct_hw_get_link_stats(struct efct_hw *hw, u8 req_ext_counters,
+ u8 clear_overflow_flags, u8 clear_all_counters,
+ void (*cb)(int status, u32 num_counters,
+ struct efct_hw_link_stat_counts *counters,
+ void *arg),
+ void *arg)
+{
+ int rc = -EIO;
+ struct efct_hw_link_stat_cb_arg *cb_arg;
+ u8 mbxdata[SLI4_BMBX_SIZE];
+
+ cb_arg = kzalloc(sizeof(*cb_arg), GFP_ATOMIC);
+ if (!cb_arg)
+ return -ENOMEM;
+
+ cb_arg->cb = cb;
+ cb_arg->arg = arg;
+
+ /* Send the HW command */
+ if (!sli_cmd_read_link_stats(&hw->sli, mbxdata, req_ext_counters,
+ clear_overflow_flags, clear_all_counters))
+ rc = efct_hw_command(hw, mbxdata, EFCT_CMD_NOWAIT,
+ efct_hw_cb_link_stat, cb_arg);
+
+ if (rc)
+ kfree(cb_arg);
+
+ return rc;
+}
+
+static int
+efct_hw_cb_host_stat(struct efct_hw *hw, int status, u8 *mqe, void *arg)
+{
+ struct sli4_cmd_read_status *mbox_rsp =
+ (struct sli4_cmd_read_status *)mqe;
+ struct efct_hw_host_stat_cb_arg *cb_arg = arg;
+ struct efct_hw_host_stat_counts counts[EFCT_HW_HOST_STAT_MAX];
+ u32 num_counters = EFCT_HW_HOST_STAT_MAX;
+
+ memset(counts, 0, sizeof(struct efct_hw_host_stat_counts) *
+ EFCT_HW_HOST_STAT_MAX);
+
+ counts[EFCT_HW_HOST_STAT_TX_KBYTE_COUNT].counter =
+ le32_to_cpu(mbox_rsp->trans_kbyte_cnt);
+ counts[EFCT_HW_HOST_STAT_RX_KBYTE_COUNT].counter =
+ le32_to_cpu(mbox_rsp->recv_kbyte_cnt);
+ counts[EFCT_HW_HOST_STAT_TX_FRAME_COUNT].counter =
+ le32_to_cpu(mbox_rsp->trans_frame_cnt);
+ counts[EFCT_HW_HOST_STAT_RX_FRAME_COUNT].counter =
+ le32_to_cpu(mbox_rsp->recv_frame_cnt);
+ counts[EFCT_HW_HOST_STAT_TX_SEQ_COUNT].counter =
+ le32_to_cpu(mbox_rsp->trans_seq_cnt);
+ counts[EFCT_HW_HOST_STAT_RX_SEQ_COUNT].counter =
+ le32_to_cpu(mbox_rsp->recv_seq_cnt);
+ counts[EFCT_HW_HOST_STAT_TOTAL_EXCH_ORIG].counter =
+ le32_to_cpu(mbox_rsp->tot_exchanges_orig);
+ counts[EFCT_HW_HOST_STAT_TOTAL_EXCH_RESP].counter =
+ le32_to_cpu(mbox_rsp->tot_exchanges_resp);
+ counts[EFCT_HW_HOSY_STAT_RX_P_BSY_COUNT].counter =
+ le32_to_cpu(mbox_rsp->recv_p_bsy_cnt);
+ counts[EFCT_HW_HOST_STAT_RX_F_BSY_COUNT].counter =
+ le32_to_cpu(mbox_rsp->recv_f_bsy_cnt);
+ counts[EFCT_HW_HOST_STAT_DROP_FRM_DUE_TO_NO_RQ_BUF_COUNT].counter =
+ le32_to_cpu(mbox_rsp->no_rq_buf_dropped_frames_cnt);
+ counts[EFCT_HW_HOST_STAT_EMPTY_RQ_TIMEOUT_COUNT].counter =
+ le32_to_cpu(mbox_rsp->empty_rq_timeout_cnt);
+ counts[EFCT_HW_HOST_STAT_DROP_FRM_DUE_TO_NO_XRI_COUNT].counter =
+ le32_to_cpu(mbox_rsp->no_xri_dropped_frames_cnt);
+ counts[EFCT_HW_HOST_STAT_EMPTY_XRI_POOL_COUNT].counter =
+ le32_to_cpu(mbox_rsp->empty_xri_pool_cnt);
+
+ if (cb_arg) {
+ if (cb_arg->cb) {
+ if (status == 0 && le16_to_cpu(mbox_rsp->hdr.status))
+ status = le16_to_cpu(mbox_rsp->hdr.status);
+ cb_arg->cb(status, num_counters, counts, cb_arg->arg);
+ }
+
+ kfree(cb_arg);
+ }
+
+ return 0;
+}
+
+int
+efct_hw_get_host_stats(struct efct_hw *hw, u8 cc,
+ void (*cb)(int status, u32 num_counters,
+ struct efct_hw_host_stat_counts *counters,
+ void *arg),
+ void *arg)
+{
+ int rc = -EIO;
+ struct efct_hw_host_stat_cb_arg *cb_arg;
+ u8 mbxdata[SLI4_BMBX_SIZE];
+
+ cb_arg = kmalloc(sizeof(*cb_arg), GFP_ATOMIC);
+ if (!cb_arg)
+ return -ENOMEM;
+
+ cb_arg->cb = cb;
+ cb_arg->arg = arg;
+
+ /* Send the HW command to get the host stats */
+ if (!sli_cmd_read_status(&hw->sli, mbxdata, cc))
+ rc = efct_hw_command(hw, mbxdata, EFCT_CMD_NOWAIT,
+ efct_hw_cb_host_stat, cb_arg);
+
+ if (rc) {
+ efc_log_debug(hw->os, "READ_HOST_STATS failed\n");
+ kfree(cb_arg);
+ }
+
+ return rc;
+}
+
+struct efct_hw_async_call_ctx {
+ efct_hw_async_cb_t callback;
+ void *arg;
+ u8 cmd[SLI4_BMBX_SIZE];
+};
+
+static void
+efct_hw_async_cb(struct efct_hw *hw, int status, u8 *mqe, void *arg)
+{
+ struct efct_hw_async_call_ctx *ctx = arg;
+
+ if (ctx) {
+ if (ctx->callback)
+ (*ctx->callback)(hw, status, mqe, ctx->arg);
+
+ kfree(ctx);
+ }
+}
+
+int
+efct_hw_async_call(struct efct_hw *hw, efct_hw_async_cb_t callback, void *arg)
+{
+ struct efct_hw_async_call_ctx *ctx;
+ int rc;
+
+ /*
+ * Allocate a callback context (which includes the mbox cmd buffer),
+ * we need this to be persistent as the mbox cmd submission may be
+ * queued and executed later execution.
+ */
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->callback = callback;
+ ctx->arg = arg;
+
+ /* Build and send a NOP mailbox command */
+ if (sli_cmd_common_nop(&hw->sli, ctx->cmd, 0)) {
+ efc_log_err(hw->os, "COMMON_NOP format failure\n");
+ kfree(ctx);
+ return -EIO;
+ }
+
+ rc = efct_hw_command(hw, ctx->cmd, EFCT_CMD_NOWAIT, efct_hw_async_cb,
+ ctx);
+ if (rc) {
+ efc_log_err(hw->os, "COMMON_NOP command failure, rc=%d\n", rc);
+ kfree(ctx);
+ return -EIO;
+ }
+ return 0;
+}
+
+static int
+efct_hw_cb_fw_write(struct efct_hw *hw, int status, u8 *mqe, void *arg)
+{
+ struct sli4_cmd_sli_config *mbox_rsp =
+ (struct sli4_cmd_sli_config *)mqe;
+ struct sli4_rsp_cmn_write_object *wr_obj_rsp;
+ struct efct_hw_fw_wr_cb_arg *cb_arg = arg;
+ u32 bytes_written;
+ u16 mbox_status;
+ u32 change_status;
+
+ wr_obj_rsp = (struct sli4_rsp_cmn_write_object *)
+ &mbox_rsp->payload.embed;
+ bytes_written = le32_to_cpu(wr_obj_rsp->actual_write_length);
+ mbox_status = le16_to_cpu(mbox_rsp->hdr.status);
+ change_status = (le32_to_cpu(wr_obj_rsp->change_status_dword) &
+ RSP_CHANGE_STATUS);
+
+ if (cb_arg) {
+ if (cb_arg->cb) {
+ if (!status && mbox_status)
+ status = mbox_status;
+ cb_arg->cb(status, bytes_written, change_status,
+ cb_arg->arg);
+ }
+
+ kfree(cb_arg);
+ }
+
+ return 0;
+}
+
+int
+efct_hw_firmware_write(struct efct_hw *hw, struct efc_dma *dma, u32 size,
+ u32 offset, int last,
+ void (*cb)(int status, u32 bytes_written,
+ u32 change_status, void *arg),
+ void *arg)
+{
+ int rc = -EIO;
+ u8 mbxdata[SLI4_BMBX_SIZE];
+ struct efct_hw_fw_wr_cb_arg *cb_arg;
+ int noc = 0;
+
+ cb_arg = kzalloc(sizeof(*cb_arg), GFP_KERNEL);
+ if (!cb_arg)
+ return -ENOMEM;
+
+ cb_arg->cb = cb;
+ cb_arg->arg = arg;
+
+ /* Write a portion of a firmware image to the device */
+ if (!sli_cmd_common_write_object(&hw->sli, mbxdata,
+ noc, last, size, offset, "/prg/",
+ dma))
+ rc = efct_hw_command(hw, mbxdata, EFCT_CMD_NOWAIT,
+ efct_hw_cb_fw_write, cb_arg);
+
+ if (rc != 0) {
+ efc_log_debug(hw->os, "COMMON_WRITE_OBJECT failed\n");
+ kfree(cb_arg);
+ }
+
+ return rc;
+}
+
+static int
+efct_hw_cb_port_control(struct efct_hw *hw, int status, u8 *mqe,
+ void *arg)
+{
+ return 0;
+}
+
+int
+efct_hw_port_control(struct efct_hw *hw, enum efct_hw_port ctrl,
+ uintptr_t value,
+ void (*cb)(int status, uintptr_t value, void *arg),
+ void *arg)
+{
+ int rc = -EIO;
+ u8 link[SLI4_BMBX_SIZE];
+ u32 speed = 0;
+ u8 reset_alpa = 0;
+
+ switch (ctrl) {
+ case EFCT_HW_PORT_INIT:
+ if (!sli_cmd_config_link(&hw->sli, link))
+ rc = efct_hw_command(hw, link, EFCT_CMD_NOWAIT,
+ efct_hw_cb_port_control, NULL);
+
+ if (rc != 0) {
+ efc_log_err(hw->os, "CONFIG_LINK failed\n");
+ break;
+ }
+ speed = hw->config.speed;
+ reset_alpa = (u8)(value & 0xff);
+
+ rc = -EIO;
+ if (!sli_cmd_init_link(&hw->sli, link, speed, reset_alpa))
+ rc = efct_hw_command(hw, link, EFCT_CMD_NOWAIT,
+ efct_hw_cb_port_control, NULL);
+ /* Free buffer on error, since no callback is coming */
+ if (rc)
+ efc_log_err(hw->os, "INIT_LINK failed\n");
+ break;
+
+ case EFCT_HW_PORT_SHUTDOWN:
+ if (!sli_cmd_down_link(&hw->sli, link))
+ rc = efct_hw_command(hw, link, EFCT_CMD_NOWAIT,
+ efct_hw_cb_port_control, NULL);
+ /* Free buffer on error, since no callback is coming */
+ if (rc)
+ efc_log_err(hw->os, "DOWN_LINK failed\n");
+ break;
+
+ default:
+ efc_log_debug(hw->os, "unhandled control %#x\n", ctrl);
+ break;
+ }
+
+ return rc;
+}
+
+void
+efct_hw_teardown(struct efct_hw *hw)
+{
+ u32 i = 0;
+ u32 destroy_queues;
+ u32 free_memory;
+ struct efc_dma *dma;
+ struct efct *efct = hw->os;
+
+ destroy_queues = (hw->state == EFCT_HW_STATE_ACTIVE);
+ free_memory = (hw->state != EFCT_HW_STATE_UNINITIALIZED);
+
+ /* Cancel Sliport Healthcheck */
+ if (hw->sliport_healthcheck) {
+ hw->sliport_healthcheck = 0;
+ efct_hw_config_sli_port_health_check(hw, 0, 0);
+ }
+
+ if (hw->state != EFCT_HW_STATE_QUEUES_ALLOCATED) {
+ hw->state = EFCT_HW_STATE_TEARDOWN_IN_PROGRESS;
+
+ efct_hw_flush(hw);
+
+ if (list_empty(&hw->cmd_head))
+ efc_log_debug(hw->os,
+ "All commands completed on MQ queue\n");
+ else
+ efc_log_debug(hw->os,
+ "Some cmds still pending on MQ queue\n");
+
+ /* Cancel any remaining commands */
+ efct_hw_command_cancel(hw);
+ } else {
+ hw->state = EFCT_HW_STATE_TEARDOWN_IN_PROGRESS;
+ }
+
+ dma_free_coherent(&efct->pci->dev,
+ hw->rnode_mem.size, hw->rnode_mem.virt,
+ hw->rnode_mem.phys);
+ memset(&hw->rnode_mem, 0, sizeof(struct efc_dma));
+
+ if (hw->io) {
+ for (i = 0; i < hw->config.n_io; i++) {
+ if (hw->io[i] && hw->io[i]->sgl &&
+ hw->io[i]->sgl->virt) {
+ dma_free_coherent(&efct->pci->dev,
+ hw->io[i]->sgl->size,
+ hw->io[i]->sgl->virt,
+ hw->io[i]->sgl->phys);
+ }
+ kfree(hw->io[i]);
+ hw->io[i] = NULL;
+ }
+ kfree(hw->io);
+ hw->io = NULL;
+ kfree(hw->wqe_buffs);
+ hw->wqe_buffs = NULL;
+ }
+
+ dma = &hw->xfer_rdy;
+ dma_free_coherent(&efct->pci->dev,
+ dma->size, dma->virt, dma->phys);
+ memset(dma, 0, sizeof(struct efc_dma));
+
+ dma = &hw->loop_map;
+ dma_free_coherent(&efct->pci->dev,
+ dma->size, dma->virt, dma->phys);
+ memset(dma, 0, sizeof(struct efc_dma));
+
+ for (i = 0; i < hw->wq_count; i++)
+ sli_queue_free(&hw->sli, &hw->wq[i], destroy_queues,
+ free_memory);
+
+ for (i = 0; i < hw->rq_count; i++)
+ sli_queue_free(&hw->sli, &hw->rq[i], destroy_queues,
+ free_memory);
+
+ for (i = 0; i < hw->mq_count; i++)
+ sli_queue_free(&hw->sli, &hw->mq[i], destroy_queues,
+ free_memory);
+
+ for (i = 0; i < hw->cq_count; i++)
+ sli_queue_free(&hw->sli, &hw->cq[i], destroy_queues,
+ free_memory);
+
+ for (i = 0; i < hw->eq_count; i++)
+ sli_queue_free(&hw->sli, &hw->eq[i], destroy_queues,
+ free_memory);
+
+ /* Free rq buffers */
+ efct_hw_rx_free(hw);
+
+ efct_hw_queue_teardown(hw);
+
+ kfree(hw->wq_cpu_array);
+
+ sli_teardown(&hw->sli);
+
+ /* record the fact that the queues are non-functional */
+ hw->state = EFCT_HW_STATE_UNINITIALIZED;
+
+ /* free sequence free pool */
+ kfree(hw->seq_pool);
+ hw->seq_pool = NULL;
+
+ /* free hw_wq_callback pool */
+ efct_hw_reqtag_pool_free(hw);
+
+ mempool_destroy(hw->cmd_ctx_pool);
+ mempool_destroy(hw->mbox_rqst_pool);
+
+ /* Mark HW setup as not having been called */
+ hw->hw_setup_called = false;
+}
+
+static int
+efct_hw_sli_reset(struct efct_hw *hw, enum efct_hw_reset reset,
+ enum efct_hw_state prev_state)
+{
+ int rc = 0;
+
+ switch (reset) {
+ case EFCT_HW_RESET_FUNCTION:
+ efc_log_debug(hw->os, "issuing function level reset\n");
+ if (sli_reset(&hw->sli)) {
+ efc_log_err(hw->os, "sli_reset failed\n");
+ rc = -EIO;
+ }
+ break;
+ case EFCT_HW_RESET_FIRMWARE:
+ efc_log_debug(hw->os, "issuing firmware reset\n");
+ if (sli_fw_reset(&hw->sli)) {
+ efc_log_err(hw->os, "sli_soft_reset failed\n");
+ rc = -EIO;
+ }
+ /*
+ * Because the FW reset leaves the FW in a non-running state,
+ * follow that with a regular reset.
+ */
+ efc_log_debug(hw->os, "issuing function level reset\n");
+ if (sli_reset(&hw->sli)) {
+ efc_log_err(hw->os, "sli_reset failed\n");
+ rc = -EIO;
+ }
+ break;
+ default:
+ efc_log_err(hw->os, "unknown type - no reset performed\n");
+ hw->state = prev_state;
+ rc = -EINVAL;
+ break;
+ }
+
+ return rc;
+}
+
+int
+efct_hw_reset(struct efct_hw *hw, enum efct_hw_reset reset)
+{
+ int rc = 0;
+ enum efct_hw_state prev_state = hw->state;
+
+ if (hw->state != EFCT_HW_STATE_ACTIVE)
+ efc_log_debug(hw->os,
+ "HW state %d is not active\n", hw->state);
+
+ hw->state = EFCT_HW_STATE_RESET_IN_PROGRESS;
+
+ /*
+ * If the prev_state is already reset/teardown in progress,
+ * don't continue further
+ */
+ if (prev_state == EFCT_HW_STATE_RESET_IN_PROGRESS ||
+ prev_state == EFCT_HW_STATE_TEARDOWN_IN_PROGRESS)
+ return efct_hw_sli_reset(hw, reset, prev_state);
+
+ if (prev_state != EFCT_HW_STATE_UNINITIALIZED) {
+ efct_hw_flush(hw);
+
+ if (list_empty(&hw->cmd_head))
+ efc_log_debug(hw->os,
+ "All commands completed on MQ queue\n");
+ else
+ efc_log_err(hw->os,
+ "Some commands still pending on MQ queue\n");
+ }
+
+ /* Reset the chip */
+ rc = efct_hw_sli_reset(hw, reset, prev_state);
+ if (rc == -EINVAL)
+ return -EIO;
+
+ return rc;
+}