diff options
Diffstat (limited to 'kernel/drivers/scsi/esas2r/esas2r_init.c')
| -rw-r--r-- | kernel/drivers/scsi/esas2r/esas2r_init.c | 1772 |
1 files changed, 1772 insertions, 0 deletions
diff --git a/kernel/drivers/scsi/esas2r/esas2r_init.c b/kernel/drivers/scsi/esas2r/esas2r_init.c new file mode 100644 index 000000000..78ce4d61a --- /dev/null +++ b/kernel/drivers/scsi/esas2r/esas2r_init.c @@ -0,0 +1,1772 @@ +/* + * linux/drivers/scsi/esas2r/esas2r_init.c + * For use with ATTO ExpressSAS R6xx SAS/SATA RAID controllers + * + * Copyright (c) 2001-2013 ATTO Technology, Inc. + * (mailto:linuxdrivers@attotech.com)mpt3sas/mpt3sas_trigger_diag. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * 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. + * + * NO WARRANTY + * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR + * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT + * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is + * solely responsible for determining the appropriateness of using and + * distributing the Program and assumes all risks associated with its + * exercise of rights under this Agreement, including but not limited to + * the risks and costs of program errors, damage to or loss of data, + * programs or equipment, and unavailability or interruption of operations. + * + * DISCLAIMER OF LIABILITY + * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE + * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED + * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + * USA. + */ + +#include "esas2r.h" + +static bool esas2r_initmem_alloc(struct esas2r_adapter *a, + struct esas2r_mem_desc *mem_desc, + u32 align) +{ + mem_desc->esas2r_param = mem_desc->size + align; + mem_desc->virt_addr = NULL; + mem_desc->phys_addr = 0; + mem_desc->esas2r_data = dma_alloc_coherent(&a->pcid->dev, + (size_t)mem_desc-> + esas2r_param, + (dma_addr_t *)&mem_desc-> + phys_addr, + GFP_KERNEL); + + if (mem_desc->esas2r_data == NULL) { + esas2r_log(ESAS2R_LOG_CRIT, + "failed to allocate %lu bytes of consistent memory!", + (long + unsigned + int)mem_desc->esas2r_param); + return false; + } + + mem_desc->virt_addr = PTR_ALIGN(mem_desc->esas2r_data, align); + mem_desc->phys_addr = ALIGN(mem_desc->phys_addr, align); + memset(mem_desc->virt_addr, 0, mem_desc->size); + return true; +} + +static void esas2r_initmem_free(struct esas2r_adapter *a, + struct esas2r_mem_desc *mem_desc) +{ + if (mem_desc->virt_addr == NULL) + return; + + /* + * Careful! phys_addr and virt_addr may have been adjusted from the + * original allocation in order to return the desired alignment. That + * means we have to use the original address (in esas2r_data) and size + * (esas2r_param) and calculate the original physical address based on + * the difference between the requested and actual allocation size. + */ + if (mem_desc->phys_addr) { + int unalign = ((u8 *)mem_desc->virt_addr) - + ((u8 *)mem_desc->esas2r_data); + + dma_free_coherent(&a->pcid->dev, + (size_t)mem_desc->esas2r_param, + mem_desc->esas2r_data, + (dma_addr_t)(mem_desc->phys_addr - unalign)); + } else { + kfree(mem_desc->esas2r_data); + } + + mem_desc->virt_addr = NULL; +} + +static bool alloc_vda_req(struct esas2r_adapter *a, + struct esas2r_request *rq) +{ + struct esas2r_mem_desc *memdesc = kzalloc( + sizeof(struct esas2r_mem_desc), GFP_KERNEL); + + if (memdesc == NULL) { + esas2r_hdebug("could not alloc mem for vda request memdesc\n"); + return false; + } + + memdesc->size = sizeof(union atto_vda_req) + + ESAS2R_DATA_BUF_LEN; + + if (!esas2r_initmem_alloc(a, memdesc, 256)) { + esas2r_hdebug("could not alloc mem for vda request\n"); + kfree(memdesc); + return false; + } + + a->num_vrqs++; + list_add(&memdesc->next_desc, &a->vrq_mds_head); + + rq->vrq_md = memdesc; + rq->vrq = (union atto_vda_req *)memdesc->virt_addr; + rq->vrq->scsi.handle = a->num_vrqs; + + return true; +} + +static void esas2r_unmap_regions(struct esas2r_adapter *a) +{ + if (a->regs) + iounmap((void __iomem *)a->regs); + + a->regs = NULL; + + pci_release_region(a->pcid, 2); + + if (a->data_window) + iounmap((void __iomem *)a->data_window); + + a->data_window = NULL; + + pci_release_region(a->pcid, 0); +} + +static int esas2r_map_regions(struct esas2r_adapter *a) +{ + int error; + + a->regs = NULL; + a->data_window = NULL; + + error = pci_request_region(a->pcid, 2, a->name); + if (error != 0) { + esas2r_log(ESAS2R_LOG_CRIT, + "pci_request_region(2) failed, error %d", + error); + + return error; + } + + a->regs = (void __force *)ioremap(pci_resource_start(a->pcid, 2), + pci_resource_len(a->pcid, 2)); + if (a->regs == NULL) { + esas2r_log(ESAS2R_LOG_CRIT, + "ioremap failed for regs mem region\n"); + pci_release_region(a->pcid, 2); + return -EFAULT; + } + + error = pci_request_region(a->pcid, 0, a->name); + if (error != 0) { + esas2r_log(ESAS2R_LOG_CRIT, + "pci_request_region(2) failed, error %d", + error); + esas2r_unmap_regions(a); + return error; + } + + a->data_window = (void __force *)ioremap(pci_resource_start(a->pcid, + 0), + pci_resource_len(a->pcid, 0)); + if (a->data_window == NULL) { + esas2r_log(ESAS2R_LOG_CRIT, + "ioremap failed for data_window mem region\n"); + esas2r_unmap_regions(a); + return -EFAULT; + } + + return 0; +} + +static void esas2r_setup_interrupts(struct esas2r_adapter *a, int intr_mode) +{ + int i; + + /* Set up interrupt mode based on the requested value */ + switch (intr_mode) { + case INTR_MODE_LEGACY: +use_legacy_interrupts: + a->intr_mode = INTR_MODE_LEGACY; + break; + + case INTR_MODE_MSI: + i = pci_enable_msi(a->pcid); + if (i != 0) { + esas2r_log(ESAS2R_LOG_WARN, + "failed to enable MSI for adapter %d, " + "falling back to legacy interrupts " + "(err=%d)", a->index, + i); + goto use_legacy_interrupts; + } + a->intr_mode = INTR_MODE_MSI; + set_bit(AF2_MSI_ENABLED, &a->flags2); + break; + + + default: + esas2r_log(ESAS2R_LOG_WARN, + "unknown interrupt_mode %d requested, " + "falling back to legacy interrupt", + interrupt_mode); + goto use_legacy_interrupts; + } +} + +static void esas2r_claim_interrupts(struct esas2r_adapter *a) +{ + unsigned long flags = 0; + + if (a->intr_mode == INTR_MODE_LEGACY) + flags |= IRQF_SHARED; + + esas2r_log(ESAS2R_LOG_INFO, + "esas2r_claim_interrupts irq=%d (%p, %s, %x)", + a->pcid->irq, a, a->name, flags); + + if (request_irq(a->pcid->irq, + (a->intr_mode == + INTR_MODE_LEGACY) ? esas2r_interrupt : + esas2r_msi_interrupt, + flags, + a->name, + a)) { + esas2r_log(ESAS2R_LOG_CRIT, "unable to request IRQ %02X", + a->pcid->irq); + return; + } + + set_bit(AF2_IRQ_CLAIMED, &a->flags2); + esas2r_log(ESAS2R_LOG_INFO, + "claimed IRQ %d flags: 0x%lx", + a->pcid->irq, flags); +} + +int esas2r_init_adapter(struct Scsi_Host *host, struct pci_dev *pcid, + int index) +{ + struct esas2r_adapter *a; + u64 bus_addr = 0; + int i; + void *next_uncached; + struct esas2r_request *first_request, *last_request; + + if (index >= MAX_ADAPTERS) { + esas2r_log(ESAS2R_LOG_CRIT, + "tried to init invalid adapter index %u!", + index); + return 0; + } + + if (esas2r_adapters[index]) { + esas2r_log(ESAS2R_LOG_CRIT, + "tried to init existing adapter index %u!", + index); + return 0; + } + + a = (struct esas2r_adapter *)host->hostdata; + memset(a, 0, sizeof(struct esas2r_adapter)); + a->pcid = pcid; + a->host = host; + + if (sizeof(dma_addr_t) > 4) { + const uint64_t required_mask = dma_get_required_mask + (&pcid->dev); + if (required_mask > DMA_BIT_MASK(32) + && !pci_set_dma_mask(pcid, DMA_BIT_MASK(64)) + && !pci_set_consistent_dma_mask(pcid, + DMA_BIT_MASK(64))) { + esas2r_log_dev(ESAS2R_LOG_INFO, + &(a->pcid->dev), + "64-bit PCI addressing enabled\n"); + } else if (!pci_set_dma_mask(pcid, DMA_BIT_MASK(32)) + && !pci_set_consistent_dma_mask(pcid, + DMA_BIT_MASK(32))) { + esas2r_log_dev(ESAS2R_LOG_INFO, + &(a->pcid->dev), + "32-bit PCI addressing enabled\n"); + } else { + esas2r_log(ESAS2R_LOG_CRIT, + "failed to set DMA mask"); + esas2r_kill_adapter(index); + return 0; + } + } else { + if (!pci_set_dma_mask(pcid, DMA_BIT_MASK(32)) + && !pci_set_consistent_dma_mask(pcid, + DMA_BIT_MASK(32))) { + esas2r_log_dev(ESAS2R_LOG_INFO, + &(a->pcid->dev), + "32-bit PCI addressing enabled\n"); + } else { + esas2r_log(ESAS2R_LOG_CRIT, + "failed to set DMA mask"); + esas2r_kill_adapter(index); + return 0; + } + } + esas2r_adapters[index] = a; + sprintf(a->name, ESAS2R_DRVR_NAME "_%02d", index); + esas2r_debug("new adapter %p, name %s", a, a->name); + spin_lock_init(&a->request_lock); + spin_lock_init(&a->fw_event_lock); + sema_init(&a->fm_api_semaphore, 1); + sema_init(&a->fs_api_semaphore, 1); + sema_init(&a->nvram_semaphore, 1); + + esas2r_fw_event_off(a); + snprintf(a->fw_event_q_name, ESAS2R_KOBJ_NAME_LEN, "esas2r/%d", + a->index); + a->fw_event_q = create_singlethread_workqueue(a->fw_event_q_name); + + init_waitqueue_head(&a->buffered_ioctl_waiter); + init_waitqueue_head(&a->nvram_waiter); + init_waitqueue_head(&a->fm_api_waiter); + init_waitqueue_head(&a->fs_api_waiter); + init_waitqueue_head(&a->vda_waiter); + + INIT_LIST_HEAD(&a->general_req.req_list); + INIT_LIST_HEAD(&a->active_list); + INIT_LIST_HEAD(&a->defer_list); + INIT_LIST_HEAD(&a->free_sg_list_head); + INIT_LIST_HEAD(&a->avail_request); + INIT_LIST_HEAD(&a->vrq_mds_head); + INIT_LIST_HEAD(&a->fw_event_list); + + first_request = (struct esas2r_request *)((u8 *)(a + 1)); + + for (last_request = first_request, i = 1; i < num_requests; + last_request++, i++) { + INIT_LIST_HEAD(&last_request->req_list); + list_add_tail(&last_request->comp_list, &a->avail_request); + if (!alloc_vda_req(a, last_request)) { + esas2r_log(ESAS2R_LOG_CRIT, + "failed to allocate a VDA request!"); + esas2r_kill_adapter(index); + return 0; + } + } + + esas2r_debug("requests: %p to %p (%d, %d)", first_request, + last_request, + sizeof(*first_request), + num_requests); + + if (esas2r_map_regions(a) != 0) { + esas2r_log(ESAS2R_LOG_CRIT, "could not map PCI regions!"); + esas2r_kill_adapter(index); + return 0; + } + + a->index = index; + + /* interrupts will be disabled until we are done with init */ + atomic_inc(&a->dis_ints_cnt); + atomic_inc(&a->disable_cnt); + set_bit(AF_CHPRST_PENDING, &a->flags); + set_bit(AF_DISC_PENDING, &a->flags); + set_bit(AF_FIRST_INIT, &a->flags); + set_bit(AF_LEGACY_SGE_MODE, &a->flags); + + a->init_msg = ESAS2R_INIT_MSG_START; + a->max_vdareq_size = 128; + a->build_sgl = esas2r_build_sg_list_sge; + + esas2r_setup_interrupts(a, interrupt_mode); + + a->uncached_size = esas2r_get_uncached_size(a); + a->uncached = dma_alloc_coherent(&pcid->dev, + (size_t)a->uncached_size, + (dma_addr_t *)&bus_addr, + GFP_KERNEL); + if (a->uncached == NULL) { + esas2r_log(ESAS2R_LOG_CRIT, + "failed to allocate %d bytes of consistent memory!", + a->uncached_size); + esas2r_kill_adapter(index); + return 0; + } + + a->uncached_phys = bus_addr; + + esas2r_debug("%d bytes uncached memory allocated @ %p (%x:%x)", + a->uncached_size, + a->uncached, + upper_32_bits(bus_addr), + lower_32_bits(bus_addr)); + memset(a->uncached, 0, a->uncached_size); + next_uncached = a->uncached; + + if (!esas2r_init_adapter_struct(a, + &next_uncached)) { + esas2r_log(ESAS2R_LOG_CRIT, + "failed to initialize adapter structure (2)!"); + esas2r_kill_adapter(index); + return 0; + } + + tasklet_init(&a->tasklet, + esas2r_adapter_tasklet, + (unsigned long)a); + + /* + * Disable chip interrupts to prevent spurious interrupts + * until we claim the IRQ. + */ + esas2r_disable_chip_interrupts(a); + esas2r_check_adapter(a); + + if (!esas2r_init_adapter_hw(a, true)) + esas2r_log(ESAS2R_LOG_CRIT, "failed to initialize hardware!"); + else + esas2r_debug("esas2r_init_adapter ok"); + + esas2r_claim_interrupts(a); + + if (test_bit(AF2_IRQ_CLAIMED, &a->flags2)) + esas2r_enable_chip_interrupts(a); + + set_bit(AF2_INIT_DONE, &a->flags2); + if (!test_bit(AF_DEGRADED_MODE, &a->flags)) + esas2r_kickoff_timer(a); + esas2r_debug("esas2r_init_adapter done for %p (%d)", + a, a->disable_cnt); + + return 1; +} + +static void esas2r_adapter_power_down(struct esas2r_adapter *a, + int power_management) +{ + struct esas2r_mem_desc *memdesc, *next; + + if ((test_bit(AF2_INIT_DONE, &a->flags2)) + && (!test_bit(AF_DEGRADED_MODE, &a->flags))) { + if (!power_management) { + del_timer_sync(&a->timer); + tasklet_kill(&a->tasklet); + } + esas2r_power_down(a); + + /* + * There are versions of firmware that do not handle the sync + * cache command correctly. Stall here to ensure that the + * cache is lazily flushed. + */ + mdelay(500); + esas2r_debug("chip halted"); + } + + /* Remove sysfs binary files */ + if (a->sysfs_fw_created) { + sysfs_remove_bin_file(&a->host->shost_dev.kobj, &bin_attr_fw); + a->sysfs_fw_created = 0; + } + + if (a->sysfs_fs_created) { + sysfs_remove_bin_file(&a->host->shost_dev.kobj, &bin_attr_fs); + a->sysfs_fs_created = 0; + } + + if (a->sysfs_vda_created) { + sysfs_remove_bin_file(&a->host->shost_dev.kobj, &bin_attr_vda); + a->sysfs_vda_created = 0; + } + + if (a->sysfs_hw_created) { + sysfs_remove_bin_file(&a->host->shost_dev.kobj, &bin_attr_hw); + a->sysfs_hw_created = 0; + } + + if (a->sysfs_live_nvram_created) { + sysfs_remove_bin_file(&a->host->shost_dev.kobj, + &bin_attr_live_nvram); + a->sysfs_live_nvram_created = 0; + } + + if (a->sysfs_default_nvram_created) { + sysfs_remove_bin_file(&a->host->shost_dev.kobj, + &bin_attr_default_nvram); + a->sysfs_default_nvram_created = 0; + } + + /* Clean up interrupts */ + if (test_bit(AF2_IRQ_CLAIMED, &a->flags2)) { + esas2r_log_dev(ESAS2R_LOG_INFO, + &(a->pcid->dev), + "free_irq(%d) called", a->pcid->irq); + + free_irq(a->pcid->irq, a); + esas2r_debug("IRQ released"); + clear_bit(AF2_IRQ_CLAIMED, &a->flags2); + } + + if (test_bit(AF2_MSI_ENABLED, &a->flags2)) { + pci_disable_msi(a->pcid); + clear_bit(AF2_MSI_ENABLED, &a->flags2); + esas2r_debug("MSI disabled"); + } + + if (a->inbound_list_md.virt_addr) + esas2r_initmem_free(a, &a->inbound_list_md); + + if (a->outbound_list_md.virt_addr) + esas2r_initmem_free(a, &a->outbound_list_md); + + list_for_each_entry_safe(memdesc, next, &a->free_sg_list_head, + next_desc) { + esas2r_initmem_free(a, memdesc); + } + + /* Following frees everything allocated via alloc_vda_req */ + list_for_each_entry_safe(memdesc, next, &a->vrq_mds_head, next_desc) { + esas2r_initmem_free(a, memdesc); + list_del(&memdesc->next_desc); + kfree(memdesc); + } + + kfree(a->first_ae_req); + a->first_ae_req = NULL; + + kfree(a->sg_list_mds); + a->sg_list_mds = NULL; + + kfree(a->req_table); + a->req_table = NULL; + + if (a->regs) { + esas2r_unmap_regions(a); + a->regs = NULL; + a->data_window = NULL; + esas2r_debug("regions unmapped"); + } +} + +/* Release/free allocated resources for specified adapters. */ +void esas2r_kill_adapter(int i) +{ + struct esas2r_adapter *a = esas2r_adapters[i]; + + if (a) { + unsigned long flags; + struct workqueue_struct *wq; + esas2r_debug("killing adapter %p [%d] ", a, i); + esas2r_fw_event_off(a); + esas2r_adapter_power_down(a, 0); + if (esas2r_buffered_ioctl && + (a->pcid == esas2r_buffered_ioctl_pcid)) { + dma_free_coherent(&a->pcid->dev, + (size_t)esas2r_buffered_ioctl_size, + esas2r_buffered_ioctl, + esas2r_buffered_ioctl_addr); + esas2r_buffered_ioctl = NULL; + } + + if (a->vda_buffer) { + dma_free_coherent(&a->pcid->dev, + (size_t)VDA_MAX_BUFFER_SIZE, + a->vda_buffer, + (dma_addr_t)a->ppvda_buffer); + a->vda_buffer = NULL; + } + if (a->fs_api_buffer) { + dma_free_coherent(&a->pcid->dev, + (size_t)a->fs_api_buffer_size, + a->fs_api_buffer, + (dma_addr_t)a->ppfs_api_buffer); + a->fs_api_buffer = NULL; + } + + kfree(a->local_atto_ioctl); + a->local_atto_ioctl = NULL; + + spin_lock_irqsave(&a->fw_event_lock, flags); + wq = a->fw_event_q; + a->fw_event_q = NULL; + spin_unlock_irqrestore(&a->fw_event_lock, flags); + if (wq) + destroy_workqueue(wq); + + if (a->uncached) { + dma_free_coherent(&a->pcid->dev, + (size_t)a->uncached_size, + a->uncached, + (dma_addr_t)a->uncached_phys); + a->uncached = NULL; + esas2r_debug("uncached area freed"); + } + + esas2r_log_dev(ESAS2R_LOG_INFO, + &(a->pcid->dev), + "pci_disable_device() called. msix_enabled: %d " + "msi_enabled: %d irq: %d pin: %d", + a->pcid->msix_enabled, + a->pcid->msi_enabled, + a->pcid->irq, + a->pcid->pin); + + esas2r_log_dev(ESAS2R_LOG_INFO, + &(a->pcid->dev), + "before pci_disable_device() enable_cnt: %d", + a->pcid->enable_cnt.counter); + + pci_disable_device(a->pcid); + esas2r_log_dev(ESAS2R_LOG_INFO, + &(a->pcid->dev), + "after pci_disable_device() enable_cnt: %d", + a->pcid->enable_cnt.counter); + + esas2r_log_dev(ESAS2R_LOG_INFO, + &(a->pcid->dev), + "pci_set_drv_data(%p, NULL) called", + a->pcid); + + pci_set_drvdata(a->pcid, NULL); + esas2r_adapters[i] = NULL; + + if (test_bit(AF2_INIT_DONE, &a->flags2)) { + clear_bit(AF2_INIT_DONE, &a->flags2); + + set_bit(AF_DEGRADED_MODE, &a->flags); + + esas2r_log_dev(ESAS2R_LOG_INFO, + &(a->host->shost_gendev), + "scsi_remove_host() called"); + + scsi_remove_host(a->host); + + esas2r_log_dev(ESAS2R_LOG_INFO, + &(a->host->shost_gendev), + "scsi_host_put() called"); + + scsi_host_put(a->host); + } + } +} + +int esas2r_cleanup(struct Scsi_Host *host) +{ + struct esas2r_adapter *a; + int index; + + if (host == NULL) { + int i; + + esas2r_debug("esas2r_cleanup everything"); + for (i = 0; i < MAX_ADAPTERS; i++) + esas2r_kill_adapter(i); + return -1; + } + + esas2r_debug("esas2r_cleanup called for host %p", host); + a = (struct esas2r_adapter *)host->hostdata; + index = a->index; + esas2r_kill_adapter(index); + return index; +} + +int esas2r_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct Scsi_Host *host = pci_get_drvdata(pdev); + u32 device_state; + struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata; + + esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "suspending adapter()"); + if (!a) + return -ENODEV; + + esas2r_adapter_power_down(a, 1); + device_state = pci_choose_state(pdev, state); + esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), + "pci_save_state() called"); + pci_save_state(pdev); + esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), + "pci_disable_device() called"); + pci_disable_device(pdev); + esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), + "pci_set_power_state() called"); + pci_set_power_state(pdev, device_state); + esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "esas2r_suspend(): 0"); + return 0; +} + +int esas2r_resume(struct pci_dev *pdev) +{ + struct Scsi_Host *host = pci_get_drvdata(pdev); + struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata; + int rez; + + esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "resuming adapter()"); + esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), + "pci_set_power_state(PCI_D0) " + "called"); + pci_set_power_state(pdev, PCI_D0); + esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), + "pci_enable_wake(PCI_D0, 0) " + "called"); + pci_enable_wake(pdev, PCI_D0, 0); + esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), + "pci_restore_state() called"); + pci_restore_state(pdev); + esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), + "pci_enable_device() called"); + rez = pci_enable_device(pdev); + pci_set_master(pdev); + + if (!a) { + rez = -ENODEV; + goto error_exit; + } + + if (esas2r_map_regions(a) != 0) { + esas2r_log(ESAS2R_LOG_CRIT, "could not re-map PCI regions!"); + rez = -ENOMEM; + goto error_exit; + } + + /* Set up interupt mode */ + esas2r_setup_interrupts(a, a->intr_mode); + + /* + * Disable chip interrupts to prevent spurious interrupts until we + * claim the IRQ. + */ + esas2r_disable_chip_interrupts(a); + if (!esas2r_power_up(a, true)) { + esas2r_debug("yikes, esas2r_power_up failed"); + rez = -ENOMEM; + goto error_exit; + } + + esas2r_claim_interrupts(a); + + if (test_bit(AF2_IRQ_CLAIMED, &a->flags2)) { + /* + * Now that system interrupt(s) are claimed, we can enable + * chip interrupts. + */ + esas2r_enable_chip_interrupts(a); + esas2r_kickoff_timer(a); + } else { + esas2r_debug("yikes, unable to claim IRQ"); + esas2r_log(ESAS2R_LOG_CRIT, "could not re-claim IRQ!"); + rez = -ENOMEM; + goto error_exit; + } + +error_exit: + esas2r_log_dev(ESAS2R_LOG_CRIT, &(pdev->dev), "esas2r_resume(): %d", + rez); + return rez; +} + +bool esas2r_set_degraded_mode(struct esas2r_adapter *a, char *error_str) +{ + set_bit(AF_DEGRADED_MODE, &a->flags); + esas2r_log(ESAS2R_LOG_CRIT, + "setting adapter to degraded mode: %s\n", error_str); + return false; +} + +u32 esas2r_get_uncached_size(struct esas2r_adapter *a) +{ + return sizeof(struct esas2r_sas_nvram) + + ALIGN(ESAS2R_DISC_BUF_LEN, 8) + + ALIGN(sizeof(u32), 8) /* outbound list copy pointer */ + + 8 + + (num_sg_lists * (u16)sgl_page_size) + + ALIGN((num_requests + num_ae_requests + 1 + + ESAS2R_LIST_EXTRA) * + sizeof(struct esas2r_inbound_list_source_entry), + 8) + + ALIGN((num_requests + num_ae_requests + 1 + + ESAS2R_LIST_EXTRA) * + sizeof(struct atto_vda_ob_rsp), 8) + + 256; /* VDA request and buffer align */ +} + +static void esas2r_init_pci_cfg_space(struct esas2r_adapter *a) +{ + int pcie_cap_reg; + + pcie_cap_reg = pci_find_capability(a->pcid, PCI_CAP_ID_EXP); + if (pcie_cap_reg) { + u16 devcontrol; + + pci_read_config_word(a->pcid, pcie_cap_reg + PCI_EXP_DEVCTL, + &devcontrol); + + if ((devcontrol & PCI_EXP_DEVCTL_READRQ) > + PCI_EXP_DEVCTL_READRQ_512B) { + esas2r_log(ESAS2R_LOG_INFO, + "max read request size > 512B"); + + devcontrol &= ~PCI_EXP_DEVCTL_READRQ; + devcontrol |= PCI_EXP_DEVCTL_READRQ_512B; + pci_write_config_word(a->pcid, + pcie_cap_reg + PCI_EXP_DEVCTL, + devcontrol); + } + } +} + +/* + * Determine the organization of the uncached data area and + * finish initializing the adapter structure + */ +bool esas2r_init_adapter_struct(struct esas2r_adapter *a, + void **uncached_area) +{ + u32 i; + u8 *high; + struct esas2r_inbound_list_source_entry *element; + struct esas2r_request *rq; + struct esas2r_mem_desc *sgl; + + spin_lock_init(&a->sg_list_lock); + spin_lock_init(&a->mem_lock); + spin_lock_init(&a->queue_lock); + + a->targetdb_end = &a->targetdb[ESAS2R_MAX_TARGETS]; + + if (!alloc_vda_req(a, &a->general_req)) { + esas2r_hdebug( + "failed to allocate a VDA request for the general req!"); + return false; + } + + /* allocate requests for asynchronous events */ + a->first_ae_req = + kzalloc(num_ae_requests * sizeof(struct esas2r_request), + GFP_KERNEL); + + if (a->first_ae_req == NULL) { + esas2r_log(ESAS2R_LOG_CRIT, + "failed to allocate memory for asynchronous events"); + return false; + } + + /* allocate the S/G list memory descriptors */ + a->sg_list_mds = kzalloc( + num_sg_lists * sizeof(struct esas2r_mem_desc), GFP_KERNEL); + + if (a->sg_list_mds == NULL) { + esas2r_log(ESAS2R_LOG_CRIT, + "failed to allocate memory for s/g list descriptors"); + return false; + } + + /* allocate the request table */ + a->req_table = + kzalloc((num_requests + num_ae_requests + + 1) * sizeof(struct esas2r_request *), GFP_KERNEL); + + if (a->req_table == NULL) { + esas2r_log(ESAS2R_LOG_CRIT, + "failed to allocate memory for the request table"); + return false; + } + + /* initialize PCI configuration space */ + esas2r_init_pci_cfg_space(a); + + /* + * the thunder_stream boards all have a serial flash part that has a + * different base address on the AHB bus. + */ + if ((a->pcid->subsystem_vendor == ATTO_VENDOR_ID) + && (a->pcid->subsystem_device & ATTO_SSDID_TBT)) + a->flags2 |= AF2_THUNDERBOLT; + + if (test_bit(AF2_THUNDERBOLT, &a->flags2)) + a->flags2 |= AF2_SERIAL_FLASH; + + if (a->pcid->subsystem_device == ATTO_TLSH_1068) + a->flags2 |= AF2_THUNDERLINK; + + /* Uncached Area */ + high = (u8 *)*uncached_area; + + /* initialize the scatter/gather table pages */ + + for (i = 0, sgl = a->sg_list_mds; i < num_sg_lists; i++, sgl++) { + sgl->size = sgl_page_size; + + list_add_tail(&sgl->next_desc, &a->free_sg_list_head); + + if (!esas2r_initmem_alloc(a, sgl, ESAS2R_SGL_ALIGN)) { + /* Allow the driver to load if the minimum count met. */ + if (i < NUM_SGL_MIN) + return false; + break; + } + } + + /* compute the size of the lists */ + a->list_size = num_requests + ESAS2R_LIST_EXTRA; + + /* allocate the inbound list */ + a->inbound_list_md.size = a->list_size * + sizeof(struct + esas2r_inbound_list_source_entry); + + if (!esas2r_initmem_alloc(a, &a->inbound_list_md, ESAS2R_LIST_ALIGN)) { + esas2r_hdebug("failed to allocate IB list"); + return false; + } + + /* allocate the outbound list */ + a->outbound_list_md.size = a->list_size * + sizeof(struct atto_vda_ob_rsp); + + if (!esas2r_initmem_alloc(a, &a->outbound_list_md, + ESAS2R_LIST_ALIGN)) { + esas2r_hdebug("failed to allocate IB list"); + return false; + } + + /* allocate the NVRAM structure */ + a->nvram = (struct esas2r_sas_nvram *)high; + high += sizeof(struct esas2r_sas_nvram); + + /* allocate the discovery buffer */ + a->disc_buffer = high; + high += ESAS2R_DISC_BUF_LEN; + high = PTR_ALIGN(high, 8); + + /* allocate the outbound list copy pointer */ + a->outbound_copy = (u32 volatile *)high; + high += sizeof(u32); + + if (!test_bit(AF_NVR_VALID, &a->flags)) + esas2r_nvram_set_defaults(a); + + /* update the caller's uncached memory area pointer */ + *uncached_area = (void *)high; + + /* initialize the allocated memory */ + if (test_bit(AF_FIRST_INIT, &a->flags)) { + memset(a->req_table, 0, + (num_requests + num_ae_requests + + 1) * sizeof(struct esas2r_request *)); + + esas2r_targ_db_initialize(a); + + /* prime parts of the inbound list */ + element = + (struct esas2r_inbound_list_source_entry *)a-> + inbound_list_md. + virt_addr; + + for (i = 0; i < a->list_size; i++) { + element->address = 0; + element->reserved = 0; + element->length = cpu_to_le32(HWILSE_INTERFACE_F0 + | (sizeof(union + atto_vda_req) + / + sizeof(u32))); + element++; + } + + /* init the AE requests */ + for (rq = a->first_ae_req, i = 0; i < num_ae_requests; rq++, + i++) { + INIT_LIST_HEAD(&rq->req_list); + if (!alloc_vda_req(a, rq)) { + esas2r_hdebug( + "failed to allocate a VDA request!"); + return false; + } + + esas2r_rq_init_request(rq, a); + + /* override the completion function */ + rq->comp_cb = esas2r_ae_complete; + } + } + + return true; +} + +/* This code will verify that the chip is operational. */ +bool esas2r_check_adapter(struct esas2r_adapter *a) +{ + u32 starttime; + u32 doorbell; + u64 ppaddr; + u32 dw; + + /* + * if the chip reset detected flag is set, we can bypass a bunch of + * stuff. + */ + if (test_bit(AF_CHPRST_DETECTED, &a->flags)) + goto skip_chip_reset; + + /* + * BEFORE WE DO ANYTHING, disable the chip interrupts! the boot driver + * may have left them enabled or we may be recovering from a fault. + */ + esas2r_write_register_dword(a, MU_INT_MASK_OUT, ESAS2R_INT_DIS_MASK); + esas2r_flush_register_dword(a, MU_INT_MASK_OUT); + + /* + * wait for the firmware to become ready by forcing an interrupt and + * waiting for a response. + */ + starttime = jiffies_to_msecs(jiffies); + + while (true) { + esas2r_force_interrupt(a); + doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT); + if (doorbell == 0xFFFFFFFF) { + /* + * Give the firmware up to two seconds to enable + * register access after a reset. + */ + if ((jiffies_to_msecs(jiffies) - starttime) > 2000) + return esas2r_set_degraded_mode(a, + "unable to access registers"); + } else if (doorbell & DRBL_FORCE_INT) { + u32 ver = (doorbell & DRBL_FW_VER_MSK); + + /* + * This driver supports version 0 and version 1 of + * the API + */ + esas2r_write_register_dword(a, MU_DOORBELL_OUT, + doorbell); + + if (ver == DRBL_FW_VER_0) { + set_bit(AF_LEGACY_SGE_MODE, &a->flags); + + a->max_vdareq_size = 128; + a->build_sgl = esas2r_build_sg_list_sge; + } else if (ver == DRBL_FW_VER_1) { + clear_bit(AF_LEGACY_SGE_MODE, &a->flags); + + a->max_vdareq_size = 1024; + a->build_sgl = esas2r_build_sg_list_prd; + } else { + return esas2r_set_degraded_mode(a, + "unknown firmware version"); + } + break; + } + + schedule_timeout_interruptible(msecs_to_jiffies(100)); + + if ((jiffies_to_msecs(jiffies) - starttime) > 180000) { + esas2r_hdebug("FW ready TMO"); + esas2r_bugon(); + + return esas2r_set_degraded_mode(a, + "firmware start has timed out"); + } + } + + /* purge any asynchronous events since we will repost them later */ + esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_MSG_IFC_DOWN); + starttime = jiffies_to_msecs(jiffies); + + while (true) { + doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT); + if (doorbell & DRBL_MSG_IFC_DOWN) { + esas2r_write_register_dword(a, MU_DOORBELL_OUT, + doorbell); + break; + } + + schedule_timeout_interruptible(msecs_to_jiffies(50)); + + if ((jiffies_to_msecs(jiffies) - starttime) > 3000) { + esas2r_hdebug("timeout waiting for interface down"); + break; + } + } +skip_chip_reset: + /* + * first things first, before we go changing any of these registers + * disable the communication lists. + */ + dw = esas2r_read_register_dword(a, MU_IN_LIST_CONFIG); + dw &= ~MU_ILC_ENABLE; + esas2r_write_register_dword(a, MU_IN_LIST_CONFIG, dw); + dw = esas2r_read_register_dword(a, MU_OUT_LIST_CONFIG); + dw &= ~MU_OLC_ENABLE; + esas2r_write_register_dword(a, MU_OUT_LIST_CONFIG, dw); + + /* configure the communication list addresses */ + ppaddr = a->inbound_list_md.phys_addr; + esas2r_write_register_dword(a, MU_IN_LIST_ADDR_LO, + lower_32_bits(ppaddr)); + esas2r_write_register_dword(a, MU_IN_LIST_ADDR_HI, + upper_32_bits(ppaddr)); + ppaddr = a->outbound_list_md.phys_addr; + esas2r_write_register_dword(a, MU_OUT_LIST_ADDR_LO, + lower_32_bits(ppaddr)); + esas2r_write_register_dword(a, MU_OUT_LIST_ADDR_HI, + upper_32_bits(ppaddr)); + ppaddr = a->uncached_phys + + ((u8 *)a->outbound_copy - a->uncached); + esas2r_write_register_dword(a, MU_OUT_LIST_COPY_PTR_LO, + lower_32_bits(ppaddr)); + esas2r_write_register_dword(a, MU_OUT_LIST_COPY_PTR_HI, + upper_32_bits(ppaddr)); + + /* reset the read and write pointers */ + *a->outbound_copy = + a->last_write = + a->last_read = a->list_size - 1; + set_bit(AF_COMM_LIST_TOGGLE, &a->flags); + esas2r_write_register_dword(a, MU_IN_LIST_WRITE, MU_ILW_TOGGLE | + a->last_write); + esas2r_write_register_dword(a, MU_OUT_LIST_COPY, MU_OLC_TOGGLE | + a->last_write); + esas2r_write_register_dword(a, MU_IN_LIST_READ, MU_ILR_TOGGLE | + a->last_write); + esas2r_write_register_dword(a, MU_OUT_LIST_WRITE, + MU_OLW_TOGGLE | a->last_write); + + /* configure the interface select fields */ + dw = esas2r_read_register_dword(a, MU_IN_LIST_IFC_CONFIG); + dw &= ~(MU_ILIC_LIST | MU_ILIC_DEST); + esas2r_write_register_dword(a, MU_IN_LIST_IFC_CONFIG, + (dw | MU_ILIC_LIST_F0 | MU_ILIC_DEST_DDR)); + dw = esas2r_read_register_dword(a, MU_OUT_LIST_IFC_CONFIG); + dw &= ~(MU_OLIC_LIST | MU_OLIC_SOURCE); + esas2r_write_register_dword(a, MU_OUT_LIST_IFC_CONFIG, + (dw | MU_OLIC_LIST_F0 | + MU_OLIC_SOURCE_DDR)); + + /* finish configuring the communication lists */ + dw = esas2r_read_register_dword(a, MU_IN_LIST_CONFIG); + dw &= ~(MU_ILC_ENTRY_MASK | MU_ILC_NUMBER_MASK); + dw |= MU_ILC_ENTRY_4_DW | MU_ILC_DYNAMIC_SRC + | (a->list_size << MU_ILC_NUMBER_SHIFT); + esas2r_write_register_dword(a, MU_IN_LIST_CONFIG, dw); + dw = esas2r_read_register_dword(a, MU_OUT_LIST_CONFIG); + dw &= ~(MU_OLC_ENTRY_MASK | MU_OLC_NUMBER_MASK); + dw |= MU_OLC_ENTRY_4_DW | (a->list_size << MU_OLC_NUMBER_SHIFT); + esas2r_write_register_dword(a, MU_OUT_LIST_CONFIG, dw); + + /* + * notify the firmware that we're done setting up the communication + * list registers. wait here until the firmware is done configuring + * its lists. it will signal that it is done by enabling the lists. + */ + esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_MSG_IFC_INIT); + starttime = jiffies_to_msecs(jiffies); + + while (true) { + doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT); + if (doorbell & DRBL_MSG_IFC_INIT) { + esas2r_write_register_dword(a, MU_DOORBELL_OUT, + doorbell); + break; + } + + schedule_timeout_interruptible(msecs_to_jiffies(100)); + + if ((jiffies_to_msecs(jiffies) - starttime) > 3000) { + esas2r_hdebug( + "timeout waiting for communication list init"); + esas2r_bugon(); + return esas2r_set_degraded_mode(a, + "timeout waiting for communication list init"); + } + } + + /* + * flag whether the firmware supports the power down doorbell. we + * determine this by reading the inbound doorbell enable mask. + */ + doorbell = esas2r_read_register_dword(a, MU_DOORBELL_IN_ENB); + if (doorbell & DRBL_POWER_DOWN) + set_bit(AF2_VDA_POWER_DOWN, &a->flags2); + else + clear_bit(AF2_VDA_POWER_DOWN, &a->flags2); + + /* + * enable assertion of outbound queue and doorbell interrupts in the + * main interrupt cause register. + */ + esas2r_write_register_dword(a, MU_OUT_LIST_INT_MASK, MU_OLIS_MASK); + esas2r_write_register_dword(a, MU_DOORBELL_OUT_ENB, DRBL_ENB_MASK); + return true; +} + +/* Process the initialization message just completed and format the next one. */ +static bool esas2r_format_init_msg(struct esas2r_adapter *a, + struct esas2r_request *rq) +{ + u32 msg = a->init_msg; + struct atto_vda_cfg_init *ci; + + a->init_msg = 0; + + switch (msg) { + case ESAS2R_INIT_MSG_START: + case ESAS2R_INIT_MSG_REINIT: + { + struct timeval now; + do_gettimeofday(&now); + esas2r_hdebug("CFG init"); + esas2r_build_cfg_req(a, + rq, + VDA_CFG_INIT, + 0, + NULL); + ci = (struct atto_vda_cfg_init *)&rq->vrq->cfg.data.init; + ci->sgl_page_size = cpu_to_le32(sgl_page_size); + ci->epoch_time = cpu_to_le32(now.tv_sec); + rq->flags |= RF_FAILURE_OK; + a->init_msg = ESAS2R_INIT_MSG_INIT; + break; + } + + case ESAS2R_INIT_MSG_INIT: + if (rq->req_stat == RS_SUCCESS) { + u32 major; + u32 minor; + u16 fw_release; + + a->fw_version = le16_to_cpu( + rq->func_rsp.cfg_rsp.vda_version); + a->fw_build = rq->func_rsp.cfg_rsp.fw_build; + fw_release = le16_to_cpu( + rq->func_rsp.cfg_rsp.fw_release); + major = LOBYTE(fw_release); + minor = HIBYTE(fw_release); + a->fw_version += (major << 16) + (minor << 24); + } else { + esas2r_hdebug("FAILED"); + } + + /* + * the 2.71 and earlier releases of R6xx firmware did not error + * unsupported config requests correctly. + */ + + if ((test_bit(AF2_THUNDERBOLT, &a->flags2)) + || (be32_to_cpu(a->fw_version) > 0x00524702)) { + esas2r_hdebug("CFG get init"); + esas2r_build_cfg_req(a, + rq, + VDA_CFG_GET_INIT2, + sizeof(struct atto_vda_cfg_init), + NULL); + + rq->vrq->cfg.sg_list_offset = offsetof( + struct atto_vda_cfg_req, + data.sge); + rq->vrq->cfg.data.prde.ctl_len = + cpu_to_le32(sizeof(struct atto_vda_cfg_init)); + rq->vrq->cfg.data.prde.address = cpu_to_le64( + rq->vrq_md->phys_addr + + sizeof(union atto_vda_req)); + rq->flags |= RF_FAILURE_OK; + a->init_msg = ESAS2R_INIT_MSG_GET_INIT; + break; + } + + case ESAS2R_INIT_MSG_GET_INIT: + if (msg == ESAS2R_INIT_MSG_GET_INIT) { + ci = (struct atto_vda_cfg_init *)rq->data_buf; + if (rq->req_stat == RS_SUCCESS) { + a->num_targets_backend = + le32_to_cpu(ci->num_targets_backend); + a->ioctl_tunnel = + le32_to_cpu(ci->ioctl_tunnel); + } else { + esas2r_hdebug("FAILED"); + } + } + /* fall through */ + + default: + rq->req_stat = RS_SUCCESS; + return false; + } + return true; +} + +/* + * Perform initialization messages via the request queue. Messages are + * performed with interrupts disabled. + */ +bool esas2r_init_msgs(struct esas2r_adapter *a) +{ + bool success = true; + struct esas2r_request *rq = &a->general_req; + + esas2r_rq_init_request(rq, a); + rq->comp_cb = esas2r_dummy_complete; + + if (a->init_msg == 0) + a->init_msg = ESAS2R_INIT_MSG_REINIT; + + while (a->init_msg) { + if (esas2r_format_init_msg(a, rq)) { + unsigned long flags; + while (true) { + spin_lock_irqsave(&a->queue_lock, flags); + esas2r_start_vda_request(a, rq); + spin_unlock_irqrestore(&a->queue_lock, flags); + esas2r_wait_request(a, rq); + if (rq->req_stat != RS_PENDING) + break; + } + } + + if (rq->req_stat == RS_SUCCESS + || ((rq->flags & RF_FAILURE_OK) + && rq->req_stat != RS_TIMEOUT)) + continue; + + esas2r_log(ESAS2R_LOG_CRIT, "init message %x failed (%x, %x)", + a->init_msg, rq->req_stat, rq->flags); + a->init_msg = ESAS2R_INIT_MSG_START; + success = false; + break; + } + + esas2r_rq_destroy_request(rq, a); + return success; +} + +/* Initialize the adapter chip */ +bool esas2r_init_adapter_hw(struct esas2r_adapter *a, bool init_poll) +{ + bool rslt = false; + struct esas2r_request *rq; + u32 i; + + if (test_bit(AF_DEGRADED_MODE, &a->flags)) + goto exit; + + if (!test_bit(AF_NVR_VALID, &a->flags)) { + if (!esas2r_nvram_read_direct(a)) + esas2r_log(ESAS2R_LOG_WARN, + "invalid/missing NVRAM parameters"); + } + + if (!esas2r_init_msgs(a)) { + esas2r_set_degraded_mode(a, "init messages failed"); + goto exit; + } + + /* The firmware is ready. */ + clear_bit(AF_DEGRADED_MODE, &a->flags); + clear_bit(AF_CHPRST_PENDING, &a->flags); + + /* Post all the async event requests */ + for (i = 0, rq = a->first_ae_req; i < num_ae_requests; i++, rq++) + esas2r_start_ae_request(a, rq); + + if (!a->flash_rev[0]) + esas2r_read_flash_rev(a); + + if (!a->image_type[0]) + esas2r_read_image_type(a); + + if (a->fw_version == 0) + a->fw_rev[0] = 0; + else + sprintf(a->fw_rev, "%1d.%02d", + (int)LOBYTE(HIWORD(a->fw_version)), + (int)HIBYTE(HIWORD(a->fw_version))); + + esas2r_hdebug("firmware revision: %s", a->fw_rev); + + if (test_bit(AF_CHPRST_DETECTED, &a->flags) + && (test_bit(AF_FIRST_INIT, &a->flags))) { + esas2r_enable_chip_interrupts(a); + return true; + } + + /* initialize discovery */ + esas2r_disc_initialize(a); + + /* + * wait for the device wait time to expire here if requested. this is + * usually requested during initial driver load and possibly when + * resuming from a low power state. deferred device waiting will use + * interrupts. chip reset recovery always defers device waiting to + * avoid being in a TASKLET too long. + */ + if (init_poll) { + u32 currtime = a->disc_start_time; + u32 nexttick = 100; + u32 deltatime; + + /* + * Block Tasklets from getting scheduled and indicate this is + * polled discovery. + */ + set_bit(AF_TASKLET_SCHEDULED, &a->flags); + set_bit(AF_DISC_POLLED, &a->flags); + + /* + * Temporarily bring the disable count to zero to enable + * deferred processing. Note that the count is already zero + * after the first initialization. + */ + if (test_bit(AF_FIRST_INIT, &a->flags)) + atomic_dec(&a->disable_cnt); + + while (test_bit(AF_DISC_PENDING, &a->flags)) { + schedule_timeout_interruptible(msecs_to_jiffies(100)); + + /* + * Determine the need for a timer tick based on the + * delta time between this and the last iteration of + * this loop. We don't use the absolute time because + * then we would have to worry about when nexttick + * wraps and currtime hasn't yet. + */ + deltatime = jiffies_to_msecs(jiffies) - currtime; + currtime += deltatime; + + /* + * Process any waiting discovery as long as the chip is + * up. If a chip reset happens during initial polling, + * we have to make sure the timer tick processes the + * doorbell indicating the firmware is ready. + */ + if (!test_bit(AF_CHPRST_PENDING, &a->flags)) + esas2r_disc_check_for_work(a); + + /* Simulate a timer tick. */ + if (nexttick <= deltatime) { + + /* Time for a timer tick */ + nexttick += 100; + esas2r_timer_tick(a); + } + + if (nexttick > deltatime) + nexttick -= deltatime; + + /* Do any deferred processing */ + if (esas2r_is_tasklet_pending(a)) + esas2r_do_tasklet_tasks(a); + + } + + if (test_bit(AF_FIRST_INIT, &a->flags)) + atomic_inc(&a->disable_cnt); + + clear_bit(AF_DISC_POLLED, &a->flags); + clear_bit(AF_TASKLET_SCHEDULED, &a->flags); + } + + + esas2r_targ_db_report_changes(a); + + /* + * For cases where (a) the initialization messages processing may + * handle an interrupt for a port event and a discovery is waiting, but + * we are not waiting for devices, or (b) the device wait time has been + * exhausted but there is still discovery pending, start any leftover + * discovery in interrupt driven mode. + */ + esas2r_disc_start_waiting(a); + + /* Enable chip interrupts */ + a->int_mask = ESAS2R_INT_STS_MASK; + esas2r_enable_chip_interrupts(a); + esas2r_enable_heartbeat(a); + rslt = true; + +exit: + /* + * Regardless of whether initialization was successful, certain things + * need to get done before we exit. + */ + + if (test_bit(AF_CHPRST_DETECTED, &a->flags) && + test_bit(AF_FIRST_INIT, &a->flags)) { + /* + * Reinitialization was performed during the first + * initialization. Only clear the chip reset flag so the + * original device polling is not cancelled. + */ + if (!rslt) + clear_bit(AF_CHPRST_PENDING, &a->flags); + } else { + /* First initialization or a subsequent re-init is complete. */ + if (!rslt) { + clear_bit(AF_CHPRST_PENDING, &a->flags); + clear_bit(AF_DISC_PENDING, &a->flags); + } + + + /* Enable deferred processing after the first initialization. */ + if (test_bit(AF_FIRST_INIT, &a->flags)) { + clear_bit(AF_FIRST_INIT, &a->flags); + + if (atomic_dec_return(&a->disable_cnt) == 0) + esas2r_do_deferred_processes(a); + } + } + + return rslt; +} + +void esas2r_reset_adapter(struct esas2r_adapter *a) +{ + set_bit(AF_OS_RESET, &a->flags); + esas2r_local_reset_adapter(a); + esas2r_schedule_tasklet(a); +} + +void esas2r_reset_chip(struct esas2r_adapter *a) +{ + if (!esas2r_is_adapter_present(a)) + return; + + /* + * Before we reset the chip, save off the VDA core dump. The VDA core + * dump is located in the upper 512KB of the onchip SRAM. Make sure + * to not overwrite a previous crash that was saved. + */ + if (test_bit(AF2_COREDUMP_AVAIL, &a->flags2) && + !test_bit(AF2_COREDUMP_SAVED, &a->flags2)) { + esas2r_read_mem_block(a, + a->fw_coredump_buff, + MW_DATA_ADDR_SRAM + 0x80000, + ESAS2R_FWCOREDUMP_SZ); + + set_bit(AF2_COREDUMP_SAVED, &a->flags2); + } + + clear_bit(AF2_COREDUMP_AVAIL, &a->flags2); + + /* Reset the chip */ + if (a->pcid->revision == MVR_FREY_B2) + esas2r_write_register_dword(a, MU_CTL_STATUS_IN_B2, + MU_CTL_IN_FULL_RST2); + else + esas2r_write_register_dword(a, MU_CTL_STATUS_IN, + MU_CTL_IN_FULL_RST); + + + /* Stall a little while to let the reset condition clear */ + mdelay(10); +} + +static void esas2r_power_down_notify_firmware(struct esas2r_adapter *a) +{ + u32 starttime; + u32 doorbell; + + esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_POWER_DOWN); + starttime = jiffies_to_msecs(jiffies); + + while (true) { + doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT); + if (doorbell & DRBL_POWER_DOWN) { + esas2r_write_register_dword(a, MU_DOORBELL_OUT, + doorbell); + break; + } + + schedule_timeout_interruptible(msecs_to_jiffies(100)); + + if ((jiffies_to_msecs(jiffies) - starttime) > 30000) { + esas2r_hdebug("Timeout waiting for power down"); + break; + } + } +} + +/* + * Perform power management processing including managing device states, adapter + * states, interrupts, and I/O. + */ +void esas2r_power_down(struct esas2r_adapter *a) +{ + set_bit(AF_POWER_MGT, &a->flags); + set_bit(AF_POWER_DOWN, &a->flags); + + if (!test_bit(AF_DEGRADED_MODE, &a->flags)) { + u32 starttime; + u32 doorbell; + + /* + * We are currently running OK and will be reinitializing later. + * increment the disable count to coordinate with + * esas2r_init_adapter. We don't have to do this in degraded + * mode since we never enabled interrupts in the first place. + */ + esas2r_disable_chip_interrupts(a); + esas2r_disable_heartbeat(a); + + /* wait for any VDA activity to clear before continuing */ + esas2r_write_register_dword(a, MU_DOORBELL_IN, + DRBL_MSG_IFC_DOWN); + starttime = jiffies_to_msecs(jiffies); + + while (true) { + doorbell = + esas2r_read_register_dword(a, MU_DOORBELL_OUT); + if (doorbell & DRBL_MSG_IFC_DOWN) { + esas2r_write_register_dword(a, MU_DOORBELL_OUT, + doorbell); + break; + } + + schedule_timeout_interruptible(msecs_to_jiffies(100)); + + if ((jiffies_to_msecs(jiffies) - starttime) > 3000) { + esas2r_hdebug( + "timeout waiting for interface down"); + break; + } + } + + /* + * For versions of firmware that support it tell them the driver + * is powering down. + */ + if (test_bit(AF2_VDA_POWER_DOWN, &a->flags2)) + esas2r_power_down_notify_firmware(a); + } + + /* Suspend I/O processing. */ + set_bit(AF_OS_RESET, &a->flags); + set_bit(AF_DISC_PENDING, &a->flags); + set_bit(AF_CHPRST_PENDING, &a->flags); + + esas2r_process_adapter_reset(a); + + /* Remove devices now that I/O is cleaned up. */ + a->prev_dev_cnt = esas2r_targ_db_get_tgt_cnt(a); + esas2r_targ_db_remove_all(a, false); +} + +/* + * Perform power management processing including managing device states, adapter + * states, interrupts, and I/O. + */ +bool esas2r_power_up(struct esas2r_adapter *a, bool init_poll) +{ + bool ret; + + clear_bit(AF_POWER_DOWN, &a->flags); + esas2r_init_pci_cfg_space(a); + set_bit(AF_FIRST_INIT, &a->flags); + atomic_inc(&a->disable_cnt); + + /* reinitialize the adapter */ + ret = esas2r_check_adapter(a); + if (!esas2r_init_adapter_hw(a, init_poll)) + ret = false; + + /* send the reset asynchronous event */ + esas2r_send_reset_ae(a, true); + + /* clear this flag after initialization. */ + clear_bit(AF_POWER_MGT, &a->flags); + return ret; +} + +bool esas2r_is_adapter_present(struct esas2r_adapter *a) +{ + if (test_bit(AF_NOT_PRESENT, &a->flags)) + return false; + + if (esas2r_read_register_dword(a, MU_DOORBELL_OUT) == 0xFFFFFFFF) { + set_bit(AF_NOT_PRESENT, &a->flags); + + return false; + } + return true; +} + +const char *esas2r_get_model_name(struct esas2r_adapter *a) +{ + switch (a->pcid->subsystem_device) { + case ATTO_ESAS_R680: + return "ATTO ExpressSAS R680"; + + case ATTO_ESAS_R608: + return "ATTO ExpressSAS R608"; + + case ATTO_ESAS_R60F: + return "ATTO ExpressSAS R60F"; + + case ATTO_ESAS_R6F0: + return "ATTO ExpressSAS R6F0"; + + case ATTO_ESAS_R644: + return "ATTO ExpressSAS R644"; + + case ATTO_ESAS_R648: + return "ATTO ExpressSAS R648"; + + case ATTO_TSSC_3808: + return "ATTO ThunderStream SC 3808D"; + + case ATTO_TSSC_3808E: + return "ATTO ThunderStream SC 3808E"; + + case ATTO_TLSH_1068: + return "ATTO ThunderLink SH 1068"; + } + + return "ATTO SAS Controller"; +} + +const char *esas2r_get_model_name_short(struct esas2r_adapter *a) +{ + switch (a->pcid->subsystem_device) { + case ATTO_ESAS_R680: + return "R680"; + + case ATTO_ESAS_R608: + return "R608"; + + case ATTO_ESAS_R60F: + return "R60F"; + + case ATTO_ESAS_R6F0: + return "R6F0"; + + case ATTO_ESAS_R644: + return "R644"; + + case ATTO_ESAS_R648: + return "R648"; + + case ATTO_TSSC_3808: + return "SC 3808D"; + + case ATTO_TSSC_3808E: + return "SC 3808E"; + + case ATTO_TLSH_1068: + return "SH 1068"; + } + + return "unknown"; +} |