diff options
Diffstat (limited to 'kernel/drivers/net/wireless/mwifiex/pcie.c')
| -rw-r--r-- | kernel/drivers/net/wireless/mwifiex/pcie.c | 2678 |
1 files changed, 2678 insertions, 0 deletions
diff --git a/kernel/drivers/net/wireless/mwifiex/pcie.c b/kernel/drivers/net/wireless/mwifiex/pcie.c new file mode 100644 index 000000000..bcc7751d8 --- /dev/null +++ b/kernel/drivers/net/wireless/mwifiex/pcie.c @@ -0,0 +1,2678 @@ +/* + * Marvell Wireless LAN device driver: PCIE specific handling + * + * Copyright (C) 2011-2014, Marvell International Ltd. + * + * This software file (the "File") is distributed by Marvell International + * Ltd. under the terms of the GNU General Public License Version 2, June 1991 + * (the "License"). You may use, redistribute and/or modify this File in + * accordance with the terms and conditions of the License, a copy of which + * is available by writing to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the + * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. + * + * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE + * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE + * ARE EXPRESSLY DISCLAIMED. The License provides additional details about + * this warranty disclaimer. + */ + +#include <linux/firmware.h> + +#include "decl.h" +#include "ioctl.h" +#include "util.h" +#include "fw.h" +#include "main.h" +#include "wmm.h" +#include "11n.h" +#include "pcie.h" + +#define PCIE_VERSION "1.0" +#define DRV_NAME "Marvell mwifiex PCIe" + +static u8 user_rmmod; + +static struct mwifiex_if_ops pcie_ops; + +static struct semaphore add_remove_card_sem; + +static struct memory_type_mapping mem_type_mapping_tbl[] = { + {"ITCM", NULL, 0, 0xF0}, + {"DTCM", NULL, 0, 0xF1}, + {"SQRAM", NULL, 0, 0xF2}, + {"IRAM", NULL, 0, 0xF3}, + {"APU", NULL, 0, 0xF4}, + {"CIU", NULL, 0, 0xF5}, + {"ICU", NULL, 0, 0xF6}, + {"MAC", NULL, 0, 0xF7}, +}; + +static int +mwifiex_map_pci_memory(struct mwifiex_adapter *adapter, struct sk_buff *skb, + size_t size, int flags) +{ + struct pcie_service_card *card = adapter->card; + struct mwifiex_dma_mapping mapping; + + mapping.addr = pci_map_single(card->dev, skb->data, size, flags); + if (pci_dma_mapping_error(card->dev, mapping.addr)) { + dev_err(adapter->dev, "failed to map pci memory!\n"); + return -1; + } + mapping.len = size; + mwifiex_store_mapping(skb, &mapping); + return 0; +} + +static void mwifiex_unmap_pci_memory(struct mwifiex_adapter *adapter, + struct sk_buff *skb, int flags) +{ + struct pcie_service_card *card = adapter->card; + struct mwifiex_dma_mapping mapping; + + mwifiex_get_mapping(skb, &mapping); + pci_unmap_single(card->dev, mapping.addr, mapping.len, flags); +} + +/* + * This function reads sleep cookie and checks if FW is ready + */ +static bool mwifiex_pcie_ok_to_access_hw(struct mwifiex_adapter *adapter) +{ + u32 *cookie_addr; + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + + if (!reg->sleep_cookie) + return true; + + if (card->sleep_cookie_vbase) { + cookie_addr = (u32 *)card->sleep_cookie_vbase; + dev_dbg(adapter->dev, "info: ACCESS_HW: sleep cookie=0x%x\n", + *cookie_addr); + if (*cookie_addr == FW_AWAKE_COOKIE) + return true; + } + + return false; +} + +#ifdef CONFIG_PM_SLEEP +/* + * Kernel needs to suspend all functions separately. Therefore all + * registered functions must have drivers with suspend and resume + * methods. Failing that the kernel simply removes the whole card. + * + * If already not suspended, this function allocates and sends a host + * sleep activate request to the firmware and turns off the traffic. + */ +static int mwifiex_pcie_suspend(struct device *dev) +{ + struct mwifiex_adapter *adapter; + struct pcie_service_card *card; + int hs_actived; + struct pci_dev *pdev = to_pci_dev(dev); + + if (pdev) { + card = pci_get_drvdata(pdev); + if (!card || !card->adapter) { + pr_err("Card or adapter structure is not valid\n"); + return 0; + } + } else { + pr_err("PCIE device is not specified\n"); + return 0; + } + + adapter = card->adapter; + + hs_actived = mwifiex_enable_hs(adapter); + + /* Indicate device suspended */ + adapter->is_suspended = true; + adapter->hs_enabling = false; + + return 0; +} + +/* + * Kernel needs to suspend all functions separately. Therefore all + * registered functions must have drivers with suspend and resume + * methods. Failing that the kernel simply removes the whole card. + * + * If already not resumed, this function turns on the traffic and + * sends a host sleep cancel request to the firmware. + */ +static int mwifiex_pcie_resume(struct device *dev) +{ + struct mwifiex_adapter *adapter; + struct pcie_service_card *card; + struct pci_dev *pdev = to_pci_dev(dev); + + if (pdev) { + card = pci_get_drvdata(pdev); + if (!card || !card->adapter) { + pr_err("Card or adapter structure is not valid\n"); + return 0; + } + } else { + pr_err("PCIE device is not specified\n"); + return 0; + } + + adapter = card->adapter; + + if (!adapter->is_suspended) { + dev_warn(adapter->dev, "Device already resumed\n"); + return 0; + } + + adapter->is_suspended = false; + + mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), + MWIFIEX_ASYNC_CMD); + + return 0; +} +#endif + +/* + * This function probes an mwifiex device and registers it. It allocates + * the card structure, enables PCIE function number and initiates the + * device registration and initialization procedure by adding a logical + * interface. + */ +static int mwifiex_pcie_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct pcie_service_card *card; + + pr_debug("info: vendor=0x%4.04X device=0x%4.04X rev=%d\n", + pdev->vendor, pdev->device, pdev->revision); + + card = kzalloc(sizeof(struct pcie_service_card), GFP_KERNEL); + if (!card) + return -ENOMEM; + + card->dev = pdev; + + if (ent->driver_data) { + struct mwifiex_pcie_device *data = (void *)ent->driver_data; + card->pcie.firmware = data->firmware; + card->pcie.reg = data->reg; + card->pcie.blksz_fw_dl = data->blksz_fw_dl; + card->pcie.tx_buf_size = data->tx_buf_size; + card->pcie.can_dump_fw = data->can_dump_fw; + card->pcie.can_ext_scan = data->can_ext_scan; + } + + if (mwifiex_add_card(card, &add_remove_card_sem, &pcie_ops, + MWIFIEX_PCIE)) { + pr_err("%s failed\n", __func__); + kfree(card); + return -1; + } + + return 0; +} + +/* + * This function removes the interface and frees up the card structure. + */ +static void mwifiex_pcie_remove(struct pci_dev *pdev) +{ + struct pcie_service_card *card; + struct mwifiex_adapter *adapter; + struct mwifiex_private *priv; + + card = pci_get_drvdata(pdev); + if (!card) + return; + + adapter = card->adapter; + if (!adapter || !adapter->priv_num) + return; + + if (user_rmmod) { +#ifdef CONFIG_PM_SLEEP + if (adapter->is_suspended) + mwifiex_pcie_resume(&pdev->dev); +#endif + + mwifiex_deauthenticate_all(adapter); + + priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY); + + mwifiex_disable_auto_ds(priv); + + mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN); + } + + mwifiex_remove_card(card->adapter, &add_remove_card_sem); +} + +static void mwifiex_pcie_shutdown(struct pci_dev *pdev) +{ + user_rmmod = 1; + mwifiex_pcie_remove(pdev); + + return; +} + +static const struct pci_device_id mwifiex_ids[] = { + { + PCIE_VENDOR_ID_MARVELL, PCIE_DEVICE_ID_MARVELL_88W8766P, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + .driver_data = (unsigned long) &mwifiex_pcie8766, + }, + { + PCIE_VENDOR_ID_MARVELL, PCIE_DEVICE_ID_MARVELL_88W8897, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + .driver_data = (unsigned long) &mwifiex_pcie8897, + }, + {}, +}; + +MODULE_DEVICE_TABLE(pci, mwifiex_ids); + +#ifdef CONFIG_PM_SLEEP +/* Power Management Hooks */ +static SIMPLE_DEV_PM_OPS(mwifiex_pcie_pm_ops, mwifiex_pcie_suspend, + mwifiex_pcie_resume); +#endif + +/* PCI Device Driver */ +static struct pci_driver __refdata mwifiex_pcie = { + .name = "mwifiex_pcie", + .id_table = mwifiex_ids, + .probe = mwifiex_pcie_probe, + .remove = mwifiex_pcie_remove, +#ifdef CONFIG_PM_SLEEP + .driver = { + .pm = &mwifiex_pcie_pm_ops, + }, +#endif + .shutdown = mwifiex_pcie_shutdown, +}; + +/* + * This function writes data into PCIE card register. + */ +static int mwifiex_write_reg(struct mwifiex_adapter *adapter, int reg, u32 data) +{ + struct pcie_service_card *card = adapter->card; + + iowrite32(data, card->pci_mmap1 + reg); + + return 0; +} + +/* + * This function reads data from PCIE card register. + */ +static int mwifiex_read_reg(struct mwifiex_adapter *adapter, int reg, u32 *data) +{ + struct pcie_service_card *card = adapter->card; + + *data = ioread32(card->pci_mmap1 + reg); + + return 0; +} + +/* This function reads u8 data from PCIE card register. */ +static int mwifiex_read_reg_byte(struct mwifiex_adapter *adapter, + int reg, u8 *data) +{ + struct pcie_service_card *card = adapter->card; + + *data = ioread8(card->pci_mmap1 + reg); + + return 0; +} + +/* + * This function adds delay loop to ensure FW is awake before proceeding. + */ +static void mwifiex_pcie_dev_wakeup_delay(struct mwifiex_adapter *adapter) +{ + int i = 0; + + while (mwifiex_pcie_ok_to_access_hw(adapter)) { + i++; + usleep_range(10, 20); + /* 50ms max wait */ + if (i == 5000) + break; + } + + return; +} + +static void mwifiex_delay_for_sleep_cookie(struct mwifiex_adapter *adapter, + u32 max_delay_loop_cnt) +{ + struct pcie_service_card *card = adapter->card; + u8 *buffer; + u32 sleep_cookie, count; + + for (count = 0; count < max_delay_loop_cnt; count++) { + buffer = card->cmdrsp_buf->data - INTF_HEADER_LEN; + sleep_cookie = *(u32 *)buffer; + + if (sleep_cookie == MWIFIEX_DEF_SLEEP_COOKIE) { + dev_dbg(adapter->dev, + "sleep cookie found at count %d\n", count); + break; + } + usleep_range(20, 30); + } + + if (count >= max_delay_loop_cnt) + dev_dbg(adapter->dev, + "max count reached while accessing sleep cookie\n"); +} + +/* This function wakes up the card by reading fw_status register. */ +static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter) +{ + u32 fw_status; + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + + dev_dbg(adapter->dev, "event: Wakeup device...\n"); + + if (reg->sleep_cookie) + mwifiex_pcie_dev_wakeup_delay(adapter); + + /* Reading fw_status register will wakeup device */ + if (mwifiex_read_reg(adapter, reg->fw_status, &fw_status)) { + dev_warn(adapter->dev, "Reading fw_status register failed\n"); + return -1; + } + + if (reg->sleep_cookie) { + mwifiex_pcie_dev_wakeup_delay(adapter); + dev_dbg(adapter->dev, "PCIE wakeup: Setting PS_STATE_AWAKE\n"); + adapter->ps_state = PS_STATE_AWAKE; + } + + return 0; +} + +/* + * This function is called after the card has woken up. + * + * The card configuration register is reset. + */ +static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter) +{ + dev_dbg(adapter->dev, "cmd: Wakeup device completed\n"); + + return 0; +} + +/* + * This function disables the host interrupt. + * + * The host interrupt mask is read, the disable bit is reset and + * written back to the card host interrupt mask register. + */ +static int mwifiex_pcie_disable_host_int(struct mwifiex_adapter *adapter) +{ + if (mwifiex_pcie_ok_to_access_hw(adapter)) { + if (mwifiex_write_reg(adapter, PCIE_HOST_INT_MASK, + 0x00000000)) { + dev_warn(adapter->dev, "Disable host interrupt failed\n"); + return -1; + } + } + + return 0; +} + +/* + * This function enables the host interrupt. + * + * The host interrupt enable mask is written to the card + * host interrupt mask register. + */ +static int mwifiex_pcie_enable_host_int(struct mwifiex_adapter *adapter) +{ + if (mwifiex_pcie_ok_to_access_hw(adapter)) { + /* Simply write the mask to the register */ + if (mwifiex_write_reg(adapter, PCIE_HOST_INT_MASK, + HOST_INTR_MASK)) { + dev_warn(adapter->dev, "Enable host interrupt failed\n"); + return -1; + } + } + + return 0; +} + +/* + * This function initializes TX buffer ring descriptors + */ +static int mwifiex_init_txq_ring(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + struct mwifiex_pcie_buf_desc *desc; + struct mwifiex_pfu_buf_desc *desc2; + int i; + + for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) { + card->tx_buf_list[i] = NULL; + if (reg->pfu_enabled) { + card->txbd_ring[i] = (void *)card->txbd_ring_vbase + + (sizeof(*desc2) * i); + desc2 = card->txbd_ring[i]; + memset(desc2, 0, sizeof(*desc2)); + } else { + card->txbd_ring[i] = (void *)card->txbd_ring_vbase + + (sizeof(*desc) * i); + desc = card->txbd_ring[i]; + memset(desc, 0, sizeof(*desc)); + } + } + + return 0; +} + +/* This function initializes RX buffer ring descriptors. Each SKB is allocated + * here and after mapping PCI memory, its physical address is assigned to + * PCIE Rx buffer descriptor's physical address. + */ +static int mwifiex_init_rxq_ring(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + struct sk_buff *skb; + struct mwifiex_pcie_buf_desc *desc; + struct mwifiex_pfu_buf_desc *desc2; + dma_addr_t buf_pa; + int i; + + for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) { + /* Allocate skb here so that firmware can DMA data from it */ + skb = mwifiex_alloc_dma_align_buf(MWIFIEX_RX_DATA_BUF_SIZE, + GFP_KERNEL | GFP_DMA); + if (!skb) { + dev_err(adapter->dev, + "Unable to allocate skb for RX ring.\n"); + kfree(card->rxbd_ring_vbase); + return -ENOMEM; + } + + if (mwifiex_map_pci_memory(adapter, skb, + MWIFIEX_RX_DATA_BUF_SIZE, + PCI_DMA_FROMDEVICE)) + return -1; + + buf_pa = MWIFIEX_SKB_DMA_ADDR(skb); + + dev_dbg(adapter->dev, + "info: RX ring: skb=%p len=%d data=%p buf_pa=%#x:%x\n", + skb, skb->len, skb->data, (u32)buf_pa, + (u32)((u64)buf_pa >> 32)); + + card->rx_buf_list[i] = skb; + if (reg->pfu_enabled) { + card->rxbd_ring[i] = (void *)card->rxbd_ring_vbase + + (sizeof(*desc2) * i); + desc2 = card->rxbd_ring[i]; + desc2->paddr = buf_pa; + desc2->len = (u16)skb->len; + desc2->frag_len = (u16)skb->len; + desc2->flags = reg->ring_flag_eop | reg->ring_flag_sop; + desc2->offset = 0; + } else { + card->rxbd_ring[i] = (void *)(card->rxbd_ring_vbase + + (sizeof(*desc) * i)); + desc = card->rxbd_ring[i]; + desc->paddr = buf_pa; + desc->len = (u16)skb->len; + desc->flags = 0; + } + } + + return 0; +} + +/* This function initializes event buffer ring descriptors. Each SKB is + * allocated here and after mapping PCI memory, its physical address is assigned + * to PCIE Rx buffer descriptor's physical address + */ +static int mwifiex_pcie_init_evt_ring(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + struct mwifiex_evt_buf_desc *desc; + struct sk_buff *skb; + dma_addr_t buf_pa; + int i; + + for (i = 0; i < MWIFIEX_MAX_EVT_BD; i++) { + /* Allocate skb here so that firmware can DMA data from it */ + skb = dev_alloc_skb(MAX_EVENT_SIZE); + if (!skb) { + dev_err(adapter->dev, + "Unable to allocate skb for EVENT buf.\n"); + kfree(card->evtbd_ring_vbase); + return -ENOMEM; + } + skb_put(skb, MAX_EVENT_SIZE); + + if (mwifiex_map_pci_memory(adapter, skb, MAX_EVENT_SIZE, + PCI_DMA_FROMDEVICE)) + return -1; + + buf_pa = MWIFIEX_SKB_DMA_ADDR(skb); + + dev_dbg(adapter->dev, + "info: EVT ring: skb=%p len=%d data=%p buf_pa=%#x:%x\n", + skb, skb->len, skb->data, (u32)buf_pa, + (u32)((u64)buf_pa >> 32)); + + card->evt_buf_list[i] = skb; + card->evtbd_ring[i] = (void *)(card->evtbd_ring_vbase + + (sizeof(*desc) * i)); + desc = card->evtbd_ring[i]; + desc->paddr = buf_pa; + desc->len = (u16)skb->len; + desc->flags = 0; + } + + return 0; +} + +/* This function cleans up TX buffer rings. If any of the buffer list has valid + * SKB address, associated SKB is freed. + */ +static void mwifiex_cleanup_txq_ring(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + struct sk_buff *skb; + struct mwifiex_pcie_buf_desc *desc; + struct mwifiex_pfu_buf_desc *desc2; + int i; + + for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) { + if (reg->pfu_enabled) { + desc2 = card->txbd_ring[i]; + if (card->tx_buf_list[i]) { + skb = card->tx_buf_list[i]; + mwifiex_unmap_pci_memory(adapter, skb, + PCI_DMA_TODEVICE); + dev_kfree_skb_any(skb); + } + memset(desc2, 0, sizeof(*desc2)); + } else { + desc = card->txbd_ring[i]; + if (card->tx_buf_list[i]) { + skb = card->tx_buf_list[i]; + mwifiex_unmap_pci_memory(adapter, skb, + PCI_DMA_TODEVICE); + dev_kfree_skb_any(skb); + } + memset(desc, 0, sizeof(*desc)); + } + card->tx_buf_list[i] = NULL; + } + + return; +} + +/* This function cleans up RX buffer rings. If any of the buffer list has valid + * SKB address, associated SKB is freed. + */ +static void mwifiex_cleanup_rxq_ring(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + struct mwifiex_pcie_buf_desc *desc; + struct mwifiex_pfu_buf_desc *desc2; + struct sk_buff *skb; + int i; + + for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) { + if (reg->pfu_enabled) { + desc2 = card->rxbd_ring[i]; + if (card->rx_buf_list[i]) { + skb = card->rx_buf_list[i]; + mwifiex_unmap_pci_memory(adapter, skb, + PCI_DMA_FROMDEVICE); + dev_kfree_skb_any(skb); + } + memset(desc2, 0, sizeof(*desc2)); + } else { + desc = card->rxbd_ring[i]; + if (card->rx_buf_list[i]) { + skb = card->rx_buf_list[i]; + mwifiex_unmap_pci_memory(adapter, skb, + PCI_DMA_FROMDEVICE); + dev_kfree_skb_any(skb); + } + memset(desc, 0, sizeof(*desc)); + } + card->rx_buf_list[i] = NULL; + } + + return; +} + +/* This function cleans up event buffer rings. If any of the buffer list has + * valid SKB address, associated SKB is freed. + */ +static void mwifiex_cleanup_evt_ring(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + struct mwifiex_evt_buf_desc *desc; + struct sk_buff *skb; + int i; + + for (i = 0; i < MWIFIEX_MAX_EVT_BD; i++) { + desc = card->evtbd_ring[i]; + if (card->evt_buf_list[i]) { + skb = card->evt_buf_list[i]; + mwifiex_unmap_pci_memory(adapter, skb, + PCI_DMA_FROMDEVICE); + dev_kfree_skb_any(skb); + } + card->evt_buf_list[i] = NULL; + memset(desc, 0, sizeof(*desc)); + } + + return; +} + +/* This function creates buffer descriptor ring for TX + */ +static int mwifiex_pcie_create_txbd_ring(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + + /* + * driver maintaines the write pointer and firmware maintaines the read + * pointer. The write pointer starts at 0 (zero) while the read pointer + * starts at zero with rollover bit set + */ + card->txbd_wrptr = 0; + + if (reg->pfu_enabled) + card->txbd_rdptr = 0; + else + card->txbd_rdptr |= reg->tx_rollover_ind; + + /* allocate shared memory for the BD ring and divide the same in to + several descriptors */ + if (reg->pfu_enabled) + card->txbd_ring_size = sizeof(struct mwifiex_pfu_buf_desc) * + MWIFIEX_MAX_TXRX_BD; + else + card->txbd_ring_size = sizeof(struct mwifiex_pcie_buf_desc) * + MWIFIEX_MAX_TXRX_BD; + + dev_dbg(adapter->dev, "info: txbd_ring: Allocating %d bytes\n", + card->txbd_ring_size); + card->txbd_ring_vbase = pci_alloc_consistent(card->dev, + card->txbd_ring_size, + &card->txbd_ring_pbase); + if (!card->txbd_ring_vbase) { + dev_err(adapter->dev, + "allocate consistent memory (%d bytes) failed!\n", + card->txbd_ring_size); + return -ENOMEM; + } + dev_dbg(adapter->dev, + "info: txbd_ring - base: %p, pbase: %#x:%x, len: %x\n", + card->txbd_ring_vbase, (unsigned int)card->txbd_ring_pbase, + (u32)((u64)card->txbd_ring_pbase >> 32), card->txbd_ring_size); + + return mwifiex_init_txq_ring(adapter); +} + +static int mwifiex_pcie_delete_txbd_ring(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + + mwifiex_cleanup_txq_ring(adapter); + + if (card->txbd_ring_vbase) + pci_free_consistent(card->dev, card->txbd_ring_size, + card->txbd_ring_vbase, + card->txbd_ring_pbase); + card->txbd_ring_size = 0; + card->txbd_wrptr = 0; + card->txbd_rdptr = 0 | reg->tx_rollover_ind; + card->txbd_ring_vbase = NULL; + card->txbd_ring_pbase = 0; + + return 0; +} + +/* + * This function creates buffer descriptor ring for RX + */ +static int mwifiex_pcie_create_rxbd_ring(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + + /* + * driver maintaines the read pointer and firmware maintaines the write + * pointer. The write pointer starts at 0 (zero) while the read pointer + * starts at zero with rollover bit set + */ + card->rxbd_wrptr = 0; + card->rxbd_rdptr = reg->rx_rollover_ind; + + if (reg->pfu_enabled) + card->rxbd_ring_size = sizeof(struct mwifiex_pfu_buf_desc) * + MWIFIEX_MAX_TXRX_BD; + else + card->rxbd_ring_size = sizeof(struct mwifiex_pcie_buf_desc) * + MWIFIEX_MAX_TXRX_BD; + + dev_dbg(adapter->dev, "info: rxbd_ring: Allocating %d bytes\n", + card->rxbd_ring_size); + card->rxbd_ring_vbase = pci_alloc_consistent(card->dev, + card->rxbd_ring_size, + &card->rxbd_ring_pbase); + if (!card->rxbd_ring_vbase) { + dev_err(adapter->dev, + "allocate consistent memory (%d bytes) failed!\n", + card->rxbd_ring_size); + return -ENOMEM; + } + + dev_dbg(adapter->dev, + "info: rxbd_ring - base: %p, pbase: %#x:%x, len: %#x\n", + card->rxbd_ring_vbase, (u32)card->rxbd_ring_pbase, + (u32)((u64)card->rxbd_ring_pbase >> 32), + card->rxbd_ring_size); + + return mwifiex_init_rxq_ring(adapter); +} + +/* + * This function deletes Buffer descriptor ring for RX + */ +static int mwifiex_pcie_delete_rxbd_ring(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + + mwifiex_cleanup_rxq_ring(adapter); + + if (card->rxbd_ring_vbase) + pci_free_consistent(card->dev, card->rxbd_ring_size, + card->rxbd_ring_vbase, + card->rxbd_ring_pbase); + card->rxbd_ring_size = 0; + card->rxbd_wrptr = 0; + card->rxbd_rdptr = 0 | reg->rx_rollover_ind; + card->rxbd_ring_vbase = NULL; + card->rxbd_ring_pbase = 0; + + return 0; +} + +/* + * This function creates buffer descriptor ring for Events + */ +static int mwifiex_pcie_create_evtbd_ring(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + + /* + * driver maintaines the read pointer and firmware maintaines the write + * pointer. The write pointer starts at 0 (zero) while the read pointer + * starts at zero with rollover bit set + */ + card->evtbd_wrptr = 0; + card->evtbd_rdptr = reg->evt_rollover_ind; + + card->evtbd_ring_size = sizeof(struct mwifiex_evt_buf_desc) * + MWIFIEX_MAX_EVT_BD; + + dev_dbg(adapter->dev, "info: evtbd_ring: Allocating %d bytes\n", + card->evtbd_ring_size); + card->evtbd_ring_vbase = pci_alloc_consistent(card->dev, + card->evtbd_ring_size, + &card->evtbd_ring_pbase); + if (!card->evtbd_ring_vbase) { + dev_err(adapter->dev, + "allocate consistent memory (%d bytes) failed!\n", + card->evtbd_ring_size); + return -ENOMEM; + } + + dev_dbg(adapter->dev, + "info: CMDRSP/EVT bd_ring - base: %p pbase: %#x:%x len: %#x\n", + card->evtbd_ring_vbase, (u32)card->evtbd_ring_pbase, + (u32)((u64)card->evtbd_ring_pbase >> 32), + card->evtbd_ring_size); + + return mwifiex_pcie_init_evt_ring(adapter); +} + +/* + * This function deletes Buffer descriptor ring for Events + */ +static int mwifiex_pcie_delete_evtbd_ring(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + + mwifiex_cleanup_evt_ring(adapter); + + if (card->evtbd_ring_vbase) + pci_free_consistent(card->dev, card->evtbd_ring_size, + card->evtbd_ring_vbase, + card->evtbd_ring_pbase); + card->evtbd_wrptr = 0; + card->evtbd_rdptr = 0 | reg->evt_rollover_ind; + card->evtbd_ring_size = 0; + card->evtbd_ring_vbase = NULL; + card->evtbd_ring_pbase = 0; + + return 0; +} + +/* + * This function allocates a buffer for CMDRSP + */ +static int mwifiex_pcie_alloc_cmdrsp_buf(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + struct sk_buff *skb; + + /* Allocate memory for receiving command response data */ + skb = dev_alloc_skb(MWIFIEX_UPLD_SIZE); + if (!skb) { + dev_err(adapter->dev, + "Unable to allocate skb for command response data.\n"); + return -ENOMEM; + } + skb_put(skb, MWIFIEX_UPLD_SIZE); + if (mwifiex_map_pci_memory(adapter, skb, MWIFIEX_UPLD_SIZE, + PCI_DMA_FROMDEVICE)) + return -1; + + card->cmdrsp_buf = skb; + + return 0; +} + +/* + * This function deletes a buffer for CMDRSP + */ +static int mwifiex_pcie_delete_cmdrsp_buf(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card; + + if (!adapter) + return 0; + + card = adapter->card; + + if (card && card->cmdrsp_buf) { + mwifiex_unmap_pci_memory(adapter, card->cmdrsp_buf, + PCI_DMA_FROMDEVICE); + dev_kfree_skb_any(card->cmdrsp_buf); + } + + if (card && card->cmd_buf) { + mwifiex_unmap_pci_memory(adapter, card->cmd_buf, + PCI_DMA_TODEVICE); + } + return 0; +} + +/* + * This function allocates a buffer for sleep cookie + */ +static int mwifiex_pcie_alloc_sleep_cookie_buf(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + + card->sleep_cookie_vbase = pci_alloc_consistent(card->dev, sizeof(u32), + &card->sleep_cookie_pbase); + if (!card->sleep_cookie_vbase) { + dev_err(adapter->dev, "pci_alloc_consistent failed!\n"); + return -ENOMEM; + } + /* Init val of Sleep Cookie */ + *(u32 *)card->sleep_cookie_vbase = FW_AWAKE_COOKIE; + + dev_dbg(adapter->dev, "alloc_scook: sleep cookie=0x%x\n", + *((u32 *)card->sleep_cookie_vbase)); + + return 0; +} + +/* + * This function deletes buffer for sleep cookie + */ +static int mwifiex_pcie_delete_sleep_cookie_buf(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card; + + if (!adapter) + return 0; + + card = adapter->card; + + if (card && card->sleep_cookie_vbase) { + pci_free_consistent(card->dev, sizeof(u32), + card->sleep_cookie_vbase, + card->sleep_cookie_pbase); + card->sleep_cookie_vbase = NULL; + } + + return 0; +} + +/* This function flushes the TX buffer descriptor ring + * This function defined as handler is also called while cleaning TXRX + * during disconnect/ bss stop. + */ +static int mwifiex_clean_pcie_ring_buf(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + + if (!mwifiex_pcie_txbd_empty(card, card->txbd_rdptr)) { + card->txbd_flush = 1; + /* write pointer already set at last send + * send dnld-rdy intr again, wait for completion. + */ + if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT, + CPU_INTR_DNLD_RDY)) { + dev_err(adapter->dev, + "failed to assert dnld-rdy interrupt.\n"); + return -1; + } + } + return 0; +} + +/* + * This function unmaps and frees downloaded data buffer + */ +static int mwifiex_pcie_send_data_complete(struct mwifiex_adapter *adapter) +{ + struct sk_buff *skb; + u32 wrdoneidx, rdptr, num_tx_buffs, unmap_count = 0; + struct mwifiex_pcie_buf_desc *desc; + struct mwifiex_pfu_buf_desc *desc2; + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + + if (!mwifiex_pcie_ok_to_access_hw(adapter)) + mwifiex_pm_wakeup_card(adapter); + + /* Read the TX ring read pointer set by firmware */ + if (mwifiex_read_reg(adapter, reg->tx_rdptr, &rdptr)) { + dev_err(adapter->dev, + "SEND COMP: failed to read reg->tx_rdptr\n"); + return -1; + } + + dev_dbg(adapter->dev, "SEND COMP: rdptr_prev=0x%x, rdptr=0x%x\n", + card->txbd_rdptr, rdptr); + + num_tx_buffs = MWIFIEX_MAX_TXRX_BD << reg->tx_start_ptr; + /* free from previous txbd_rdptr to current txbd_rdptr */ + while (((card->txbd_rdptr & reg->tx_mask) != + (rdptr & reg->tx_mask)) || + ((card->txbd_rdptr & reg->tx_rollover_ind) != + (rdptr & reg->tx_rollover_ind))) { + wrdoneidx = (card->txbd_rdptr & reg->tx_mask) >> + reg->tx_start_ptr; + + skb = card->tx_buf_list[wrdoneidx]; + + if (skb) { + dev_dbg(adapter->dev, + "SEND COMP: Detach skb %p at txbd_rdidx=%d\n", + skb, wrdoneidx); + mwifiex_unmap_pci_memory(adapter, skb, + PCI_DMA_TODEVICE); + + unmap_count++; + + if (card->txbd_flush) + mwifiex_write_data_complete(adapter, skb, 0, + -1); + else + mwifiex_write_data_complete(adapter, skb, 0, 0); + } + + card->tx_buf_list[wrdoneidx] = NULL; + + if (reg->pfu_enabled) { + desc2 = card->txbd_ring[wrdoneidx]; + memset(desc2, 0, sizeof(*desc2)); + } else { + desc = card->txbd_ring[wrdoneidx]; + memset(desc, 0, sizeof(*desc)); + } + switch (card->dev->device) { + case PCIE_DEVICE_ID_MARVELL_88W8766P: + card->txbd_rdptr++; + break; + case PCIE_DEVICE_ID_MARVELL_88W8897: + card->txbd_rdptr += reg->ring_tx_start_ptr; + break; + } + + + if ((card->txbd_rdptr & reg->tx_mask) == num_tx_buffs) + card->txbd_rdptr = ((card->txbd_rdptr & + reg->tx_rollover_ind) ^ + reg->tx_rollover_ind); + } + + if (unmap_count) + adapter->data_sent = false; + + if (card->txbd_flush) { + if (mwifiex_pcie_txbd_empty(card, card->txbd_rdptr)) + card->txbd_flush = 0; + else + mwifiex_clean_pcie_ring_buf(adapter); + } + + return 0; +} + +/* This function sends data buffer to device. First 4 bytes of payload + * are filled with payload length and payload type. Then this payload + * is mapped to PCI device memory. Tx ring pointers are advanced accordingly. + * Download ready interrupt to FW is deffered if Tx ring is not full and + * additional payload can be accomodated. + * Caller must ensure tx_param parameter to this function is not NULL. + */ +static int +mwifiex_pcie_send_data(struct mwifiex_adapter *adapter, struct sk_buff *skb, + struct mwifiex_tx_param *tx_param) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + u32 wrindx, num_tx_buffs, rx_val; + int ret; + dma_addr_t buf_pa; + struct mwifiex_pcie_buf_desc *desc = NULL; + struct mwifiex_pfu_buf_desc *desc2 = NULL; + __le16 *tmp; + + if (!(skb->data && skb->len)) { + dev_err(adapter->dev, "%s(): invalid parameter <%p, %#x>\n", + __func__, skb->data, skb->len); + return -1; + } + + if (!mwifiex_pcie_ok_to_access_hw(adapter)) + mwifiex_pm_wakeup_card(adapter); + + num_tx_buffs = MWIFIEX_MAX_TXRX_BD << reg->tx_start_ptr; + dev_dbg(adapter->dev, "info: SEND DATA: <Rd: %#x, Wr: %#x>\n", + card->txbd_rdptr, card->txbd_wrptr); + if (mwifiex_pcie_txbd_not_full(card)) { + u8 *payload; + + adapter->data_sent = true; + payload = skb->data; + tmp = (__le16 *)&payload[0]; + *tmp = cpu_to_le16((u16)skb->len); + tmp = (__le16 *)&payload[2]; + *tmp = cpu_to_le16(MWIFIEX_TYPE_DATA); + + if (mwifiex_map_pci_memory(adapter, skb, skb->len, + PCI_DMA_TODEVICE)) + return -1; + + wrindx = (card->txbd_wrptr & reg->tx_mask) >> reg->tx_start_ptr; + buf_pa = MWIFIEX_SKB_DMA_ADDR(skb); + card->tx_buf_list[wrindx] = skb; + + if (reg->pfu_enabled) { + desc2 = card->txbd_ring[wrindx]; + desc2->paddr = buf_pa; + desc2->len = (u16)skb->len; + desc2->frag_len = (u16)skb->len; + desc2->offset = 0; + desc2->flags = MWIFIEX_BD_FLAG_FIRST_DESC | + MWIFIEX_BD_FLAG_LAST_DESC; + } else { + desc = card->txbd_ring[wrindx]; + desc->paddr = buf_pa; + desc->len = (u16)skb->len; + desc->flags = MWIFIEX_BD_FLAG_FIRST_DESC | + MWIFIEX_BD_FLAG_LAST_DESC; + } + + switch (card->dev->device) { + case PCIE_DEVICE_ID_MARVELL_88W8766P: + card->txbd_wrptr++; + break; + case PCIE_DEVICE_ID_MARVELL_88W8897: + card->txbd_wrptr += reg->ring_tx_start_ptr; + break; + } + + if ((card->txbd_wrptr & reg->tx_mask) == num_tx_buffs) + card->txbd_wrptr = ((card->txbd_wrptr & + reg->tx_rollover_ind) ^ + reg->tx_rollover_ind); + + rx_val = card->rxbd_rdptr & reg->rx_wrap_mask; + /* Write the TX ring write pointer in to reg->tx_wrptr */ + if (mwifiex_write_reg(adapter, reg->tx_wrptr, + card->txbd_wrptr | rx_val)) { + dev_err(adapter->dev, + "SEND DATA: failed to write reg->tx_wrptr\n"); + ret = -1; + goto done_unmap; + } + if ((mwifiex_pcie_txbd_not_full(card)) && + tx_param->next_pkt_len) { + /* have more packets and TxBD still can hold more */ + dev_dbg(adapter->dev, + "SEND DATA: delay dnld-rdy interrupt.\n"); + adapter->data_sent = false; + } else { + /* Send the TX ready interrupt */ + if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT, + CPU_INTR_DNLD_RDY)) { + dev_err(adapter->dev, + "SEND DATA: failed to assert dnld-rdy interrupt.\n"); + ret = -1; + goto done_unmap; + } + } + dev_dbg(adapter->dev, "info: SEND DATA: Updated <Rd: %#x, Wr: " + "%#x> and sent packet to firmware successfully\n", + card->txbd_rdptr, card->txbd_wrptr); + } else { + dev_dbg(adapter->dev, + "info: TX Ring full, can't send packets to fw\n"); + adapter->data_sent = true; + /* Send the TX ready interrupt */ + if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT, + CPU_INTR_DNLD_RDY)) + dev_err(adapter->dev, + "SEND DATA: failed to assert door-bell intr\n"); + return -EBUSY; + } + + return -EINPROGRESS; +done_unmap: + mwifiex_unmap_pci_memory(adapter, skb, PCI_DMA_TODEVICE); + card->tx_buf_list[wrindx] = NULL; + if (reg->pfu_enabled) + memset(desc2, 0, sizeof(*desc2)); + else + memset(desc, 0, sizeof(*desc)); + + return ret; +} + +/* + * This function handles received buffer ring and + * dispatches packets to upper + */ +static int mwifiex_pcie_process_recv_data(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + u32 wrptr, rd_index, tx_val; + dma_addr_t buf_pa; + int ret = 0; + struct sk_buff *skb_tmp = NULL; + struct mwifiex_pcie_buf_desc *desc; + struct mwifiex_pfu_buf_desc *desc2; + + if (!mwifiex_pcie_ok_to_access_hw(adapter)) + mwifiex_pm_wakeup_card(adapter); + + /* Read the RX ring Write pointer set by firmware */ + if (mwifiex_read_reg(adapter, reg->rx_wrptr, &wrptr)) { + dev_err(adapter->dev, + "RECV DATA: failed to read reg->rx_wrptr\n"); + ret = -1; + goto done; + } + card->rxbd_wrptr = wrptr; + + while (((wrptr & reg->rx_mask) != + (card->rxbd_rdptr & reg->rx_mask)) || + ((wrptr & reg->rx_rollover_ind) == + (card->rxbd_rdptr & reg->rx_rollover_ind))) { + struct sk_buff *skb_data; + u16 rx_len; + __le16 pkt_len; + + rd_index = card->rxbd_rdptr & reg->rx_mask; + skb_data = card->rx_buf_list[rd_index]; + + /* If skb allocation was failed earlier for Rx packet, + * rx_buf_list[rd_index] would have been left with a NULL. + */ + if (!skb_data) + return -ENOMEM; + + mwifiex_unmap_pci_memory(adapter, skb_data, PCI_DMA_FROMDEVICE); + card->rx_buf_list[rd_index] = NULL; + + /* Get data length from interface header - + * first 2 bytes for len, next 2 bytes is for type + */ + pkt_len = *((__le16 *)skb_data->data); + rx_len = le16_to_cpu(pkt_len); + if (WARN_ON(rx_len <= INTF_HEADER_LEN || + rx_len > MWIFIEX_RX_DATA_BUF_SIZE)) { + dev_err(adapter->dev, + "Invalid RX len %d, Rd=%#x, Wr=%#x\n", + rx_len, card->rxbd_rdptr, wrptr); + dev_kfree_skb_any(skb_data); + } else { + skb_put(skb_data, rx_len); + dev_dbg(adapter->dev, + "info: RECV DATA: Rd=%#x, Wr=%#x, Len=%d\n", + card->rxbd_rdptr, wrptr, rx_len); + skb_pull(skb_data, INTF_HEADER_LEN); + if (adapter->rx_work_enabled) { + skb_queue_tail(&adapter->rx_data_q, skb_data); + adapter->data_received = true; + atomic_inc(&adapter->rx_pending); + } else { + mwifiex_handle_rx_packet(adapter, skb_data); + } + } + + skb_tmp = mwifiex_alloc_dma_align_buf(MWIFIEX_RX_DATA_BUF_SIZE, + GFP_KERNEL | GFP_DMA); + if (!skb_tmp) { + dev_err(adapter->dev, + "Unable to allocate skb.\n"); + return -ENOMEM; + } + + if (mwifiex_map_pci_memory(adapter, skb_tmp, + MWIFIEX_RX_DATA_BUF_SIZE, + PCI_DMA_FROMDEVICE)) + return -1; + + buf_pa = MWIFIEX_SKB_DMA_ADDR(skb_tmp); + + dev_dbg(adapter->dev, + "RECV DATA: Attach new sk_buff %p at rxbd_rdidx=%d\n", + skb_tmp, rd_index); + card->rx_buf_list[rd_index] = skb_tmp; + + if (reg->pfu_enabled) { + desc2 = card->rxbd_ring[rd_index]; + desc2->paddr = buf_pa; + desc2->len = skb_tmp->len; + desc2->frag_len = skb_tmp->len; + desc2->offset = 0; + desc2->flags = reg->ring_flag_sop | reg->ring_flag_eop; + } else { + desc = card->rxbd_ring[rd_index]; + desc->paddr = buf_pa; + desc->len = skb_tmp->len; + desc->flags = 0; + } + + if ((++card->rxbd_rdptr & reg->rx_mask) == + MWIFIEX_MAX_TXRX_BD) { + card->rxbd_rdptr = ((card->rxbd_rdptr & + reg->rx_rollover_ind) ^ + reg->rx_rollover_ind); + } + dev_dbg(adapter->dev, "info: RECV DATA: <Rd: %#x, Wr: %#x>\n", + card->rxbd_rdptr, wrptr); + + tx_val = card->txbd_wrptr & reg->tx_wrap_mask; + /* Write the RX ring read pointer in to reg->rx_rdptr */ + if (mwifiex_write_reg(adapter, reg->rx_rdptr, + card->rxbd_rdptr | tx_val)) { + dev_err(adapter->dev, + "RECV DATA: failed to write reg->rx_rdptr\n"); + ret = -1; + goto done; + } + + /* Read the RX ring Write pointer set by firmware */ + if (mwifiex_read_reg(adapter, reg->rx_wrptr, &wrptr)) { + dev_err(adapter->dev, + "RECV DATA: failed to read reg->rx_wrptr\n"); + ret = -1; + goto done; + } + dev_dbg(adapter->dev, + "info: RECV DATA: Rcvd packet from fw successfully\n"); + card->rxbd_wrptr = wrptr; + } + +done: + return ret; +} + +/* + * This function downloads the boot command to device + */ +static int +mwifiex_pcie_send_boot_cmd(struct mwifiex_adapter *adapter, struct sk_buff *skb) +{ + dma_addr_t buf_pa; + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + + if (!(skb->data && skb->len)) { + dev_err(adapter->dev, + "Invalid parameter in %s <%p. len %d>\n", + __func__, skb->data, skb->len); + return -1; + } + + if (mwifiex_map_pci_memory(adapter, skb, skb->len , PCI_DMA_TODEVICE)) + return -1; + + buf_pa = MWIFIEX_SKB_DMA_ADDR(skb); + + /* Write the lower 32bits of the physical address to low command + * address scratch register + */ + if (mwifiex_write_reg(adapter, reg->cmd_addr_lo, (u32)buf_pa)) { + dev_err(adapter->dev, + "%s: failed to write download command to boot code.\n", + __func__); + mwifiex_unmap_pci_memory(adapter, skb, PCI_DMA_TODEVICE); + return -1; + } + + /* Write the upper 32bits of the physical address to high command + * address scratch register + */ + if (mwifiex_write_reg(adapter, reg->cmd_addr_hi, + (u32)((u64)buf_pa >> 32))) { + dev_err(adapter->dev, + "%s: failed to write download command to boot code.\n", + __func__); + mwifiex_unmap_pci_memory(adapter, skb, PCI_DMA_TODEVICE); + return -1; + } + + /* Write the command length to cmd_size scratch register */ + if (mwifiex_write_reg(adapter, reg->cmd_size, skb->len)) { + dev_err(adapter->dev, + "%s: failed to write command len to cmd_size scratch reg\n", + __func__); + mwifiex_unmap_pci_memory(adapter, skb, PCI_DMA_TODEVICE); + return -1; + } + + /* Ring the door bell */ + if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT, + CPU_INTR_DOOR_BELL)) { + dev_err(adapter->dev, + "%s: failed to assert door-bell intr\n", __func__); + mwifiex_unmap_pci_memory(adapter, skb, PCI_DMA_TODEVICE); + return -1; + } + + return 0; +} + +/* This function init rx port in firmware which in turn enables to receive data + * from device before transmitting any packet. + */ +static int mwifiex_pcie_init_fw_port(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + int tx_wrap = card->txbd_wrptr & reg->tx_wrap_mask; + + /* Write the RX ring read pointer in to reg->rx_rdptr */ + if (mwifiex_write_reg(adapter, reg->rx_rdptr, card->rxbd_rdptr | + tx_wrap)) { + dev_err(adapter->dev, + "RECV DATA: failed to write reg->rx_rdptr\n"); + return -1; + } + return 0; +} + +/* This function downloads commands to the device + */ +static int +mwifiex_pcie_send_cmd(struct mwifiex_adapter *adapter, struct sk_buff *skb) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + int ret = 0; + dma_addr_t cmd_buf_pa, cmdrsp_buf_pa; + u8 *payload = (u8 *)skb->data; + + if (!(skb->data && skb->len)) { + dev_err(adapter->dev, "Invalid parameter in %s <%p, %#x>\n", + __func__, skb->data, skb->len); + return -1; + } + + /* Make sure a command response buffer is available */ + if (!card->cmdrsp_buf) { + dev_err(adapter->dev, + "No response buffer available, send command failed\n"); + return -EBUSY; + } + + if (!mwifiex_pcie_ok_to_access_hw(adapter)) + mwifiex_pm_wakeup_card(adapter); + + adapter->cmd_sent = true; + + *(__le16 *)&payload[0] = cpu_to_le16((u16)skb->len); + *(__le16 *)&payload[2] = cpu_to_le16(MWIFIEX_TYPE_CMD); + + if (mwifiex_map_pci_memory(adapter, skb, skb->len, PCI_DMA_TODEVICE)) + return -1; + + card->cmd_buf = skb; + + /* To send a command, the driver will: + 1. Write the 64bit physical address of the data buffer to + cmd response address low + cmd response address high + 2. Ring the door bell (i.e. set the door bell interrupt) + + In response to door bell interrupt, the firmware will perform + the DMA of the command packet (first header to obtain the total + length and then rest of the command). + */ + + if (card->cmdrsp_buf) { + cmdrsp_buf_pa = MWIFIEX_SKB_DMA_ADDR(card->cmdrsp_buf); + /* Write the lower 32bits of the cmdrsp buffer physical + address */ + if (mwifiex_write_reg(adapter, reg->cmdrsp_addr_lo, + (u32)cmdrsp_buf_pa)) { + dev_err(adapter->dev, + "Failed to write download cmd to boot code.\n"); + ret = -1; + goto done; + } + /* Write the upper 32bits of the cmdrsp buffer physical + address */ + if (mwifiex_write_reg(adapter, reg->cmdrsp_addr_hi, + (u32)((u64)cmdrsp_buf_pa >> 32))) { + dev_err(adapter->dev, + "Failed to write download cmd to boot code.\n"); + ret = -1; + goto done; + } + } + + cmd_buf_pa = MWIFIEX_SKB_DMA_ADDR(card->cmd_buf); + /* Write the lower 32bits of the physical address to reg->cmd_addr_lo */ + if (mwifiex_write_reg(adapter, reg->cmd_addr_lo, + (u32)cmd_buf_pa)) { + dev_err(adapter->dev, + "Failed to write download cmd to boot code.\n"); + ret = -1; + goto done; + } + /* Write the upper 32bits of the physical address to reg->cmd_addr_hi */ + if (mwifiex_write_reg(adapter, reg->cmd_addr_hi, + (u32)((u64)cmd_buf_pa >> 32))) { + dev_err(adapter->dev, + "Failed to write download cmd to boot code.\n"); + ret = -1; + goto done; + } + + /* Write the command length to reg->cmd_size */ + if (mwifiex_write_reg(adapter, reg->cmd_size, + card->cmd_buf->len)) { + dev_err(adapter->dev, + "Failed to write cmd len to reg->cmd_size\n"); + ret = -1; + goto done; + } + + /* Ring the door bell */ + if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT, + CPU_INTR_DOOR_BELL)) { + dev_err(adapter->dev, + "Failed to assert door-bell intr\n"); + ret = -1; + goto done; + } + +done: + if (ret) + adapter->cmd_sent = false; + + return 0; +} + +/* + * This function handles command complete interrupt + */ +static int mwifiex_pcie_process_cmd_complete(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + struct sk_buff *skb = card->cmdrsp_buf; + int count = 0; + u16 rx_len; + __le16 pkt_len; + + dev_dbg(adapter->dev, "info: Rx CMD Response\n"); + + mwifiex_unmap_pci_memory(adapter, skb, PCI_DMA_FROMDEVICE); + + /* Unmap the command as a response has been received. */ + if (card->cmd_buf) { + mwifiex_unmap_pci_memory(adapter, card->cmd_buf, + PCI_DMA_TODEVICE); + card->cmd_buf = NULL; + } + + pkt_len = *((__le16 *)skb->data); + rx_len = le16_to_cpu(pkt_len); + skb_trim(skb, rx_len); + skb_pull(skb, INTF_HEADER_LEN); + + if (!adapter->curr_cmd) { + if (adapter->ps_state == PS_STATE_SLEEP_CFM) { + mwifiex_process_sleep_confirm_resp(adapter, skb->data, + skb->len); + mwifiex_pcie_enable_host_int(adapter); + if (mwifiex_write_reg(adapter, + PCIE_CPU_INT_EVENT, + CPU_INTR_SLEEP_CFM_DONE)) { + dev_warn(adapter->dev, + "Write register failed\n"); + return -1; + } + mwifiex_delay_for_sleep_cookie(adapter, + MWIFIEX_MAX_DELAY_COUNT); + while (reg->sleep_cookie && (count++ < 10) && + mwifiex_pcie_ok_to_access_hw(adapter)) + usleep_range(50, 60); + } else { + dev_err(adapter->dev, + "There is no command but got cmdrsp\n"); + } + memcpy(adapter->upld_buf, skb->data, + min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER, skb->len)); + skb_push(skb, INTF_HEADER_LEN); + if (mwifiex_map_pci_memory(adapter, skb, MWIFIEX_UPLD_SIZE, + PCI_DMA_FROMDEVICE)) + return -1; + } else if (mwifiex_pcie_ok_to_access_hw(adapter)) { + adapter->curr_cmd->resp_skb = skb; + adapter->cmd_resp_received = true; + /* Take the pointer and set it to CMD node and will + return in the response complete callback */ + card->cmdrsp_buf = NULL; + + /* Clear the cmd-rsp buffer address in scratch registers. This + will prevent firmware from writing to the same response + buffer again. */ + if (mwifiex_write_reg(adapter, reg->cmdrsp_addr_lo, 0)) { + dev_err(adapter->dev, + "cmd_done: failed to clear cmd_rsp_addr_lo\n"); + return -1; + } + /* Write the upper 32bits of the cmdrsp buffer physical + address */ + if (mwifiex_write_reg(adapter, reg->cmdrsp_addr_hi, 0)) { + dev_err(adapter->dev, + "cmd_done: failed to clear cmd_rsp_addr_hi\n"); + return -1; + } + } + + return 0; +} + +/* + * Command Response processing complete handler + */ +static int mwifiex_pcie_cmdrsp_complete(struct mwifiex_adapter *adapter, + struct sk_buff *skb) +{ + struct pcie_service_card *card = adapter->card; + + if (skb) { + card->cmdrsp_buf = skb; + skb_push(card->cmdrsp_buf, INTF_HEADER_LEN); + if (mwifiex_map_pci_memory(adapter, skb, MWIFIEX_UPLD_SIZE, + PCI_DMA_FROMDEVICE)) + return -1; + } + + return 0; +} + +/* + * This function handles firmware event ready interrupt + */ +static int mwifiex_pcie_process_event_ready(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + u32 rdptr = card->evtbd_rdptr & MWIFIEX_EVTBD_MASK; + u32 wrptr, event; + struct mwifiex_evt_buf_desc *desc; + + if (!mwifiex_pcie_ok_to_access_hw(adapter)) + mwifiex_pm_wakeup_card(adapter); + + if (adapter->event_received) { + dev_dbg(adapter->dev, "info: Event being processed, " + "do not process this interrupt just yet\n"); + return 0; + } + + if (rdptr >= MWIFIEX_MAX_EVT_BD) { + dev_dbg(adapter->dev, "info: Invalid read pointer...\n"); + return -1; + } + + /* Read the event ring write pointer set by firmware */ + if (mwifiex_read_reg(adapter, reg->evt_wrptr, &wrptr)) { + dev_err(adapter->dev, + "EventReady: failed to read reg->evt_wrptr\n"); + return -1; + } + + dev_dbg(adapter->dev, "info: EventReady: Initial <Rd: 0x%x, Wr: 0x%x>", + card->evtbd_rdptr, wrptr); + if (((wrptr & MWIFIEX_EVTBD_MASK) != (card->evtbd_rdptr + & MWIFIEX_EVTBD_MASK)) || + ((wrptr & reg->evt_rollover_ind) == + (card->evtbd_rdptr & reg->evt_rollover_ind))) { + struct sk_buff *skb_cmd; + __le16 data_len = 0; + u16 evt_len; + + dev_dbg(adapter->dev, "info: Read Index: %d\n", rdptr); + skb_cmd = card->evt_buf_list[rdptr]; + mwifiex_unmap_pci_memory(adapter, skb_cmd, PCI_DMA_FROMDEVICE); + + /* Take the pointer and set it to event pointer in adapter + and will return back after event handling callback */ + card->evt_buf_list[rdptr] = NULL; + desc = card->evtbd_ring[rdptr]; + memset(desc, 0, sizeof(*desc)); + + event = *(u32 *) &skb_cmd->data[INTF_HEADER_LEN]; + adapter->event_cause = event; + /* The first 4bytes will be the event transfer header + len is 2 bytes followed by type which is 2 bytes */ + memcpy(&data_len, skb_cmd->data, sizeof(__le16)); + evt_len = le16_to_cpu(data_len); + + skb_pull(skb_cmd, INTF_HEADER_LEN); + dev_dbg(adapter->dev, "info: Event length: %d\n", evt_len); + + if ((evt_len > 0) && (evt_len < MAX_EVENT_SIZE)) + memcpy(adapter->event_body, skb_cmd->data + + MWIFIEX_EVENT_HEADER_LEN, evt_len - + MWIFIEX_EVENT_HEADER_LEN); + + adapter->event_received = true; + adapter->event_skb = skb_cmd; + + /* Do not update the event read pointer here, wait till the + buffer is released. This is just to make things simpler, + we need to find a better method of managing these buffers. + */ + } else { + if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT, + CPU_INTR_EVENT_DONE)) { + dev_warn(adapter->dev, + "Write register failed\n"); + return -1; + } + } + + return 0; +} + +/* + * Event processing complete handler + */ +static int mwifiex_pcie_event_complete(struct mwifiex_adapter *adapter, + struct sk_buff *skb) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + int ret = 0; + u32 rdptr = card->evtbd_rdptr & MWIFIEX_EVTBD_MASK; + u32 wrptr; + struct mwifiex_evt_buf_desc *desc; + + if (!skb) + return 0; + + if (rdptr >= MWIFIEX_MAX_EVT_BD) { + dev_err(adapter->dev, "event_complete: Invalid rdptr 0x%x\n", + rdptr); + return -EINVAL; + } + + /* Read the event ring write pointer set by firmware */ + if (mwifiex_read_reg(adapter, reg->evt_wrptr, &wrptr)) { + dev_err(adapter->dev, + "event_complete: failed to read reg->evt_wrptr\n"); + return -1; + } + + if (!card->evt_buf_list[rdptr]) { + skb_push(skb, INTF_HEADER_LEN); + if (mwifiex_map_pci_memory(adapter, skb, + MAX_EVENT_SIZE, + PCI_DMA_FROMDEVICE)) + return -1; + card->evt_buf_list[rdptr] = skb; + desc = card->evtbd_ring[rdptr]; + desc->paddr = MWIFIEX_SKB_DMA_ADDR(skb); + desc->len = (u16)skb->len; + desc->flags = 0; + skb = NULL; + } else { + dev_dbg(adapter->dev, + "info: ERROR: buf still valid at index %d, <%p, %p>\n", + rdptr, card->evt_buf_list[rdptr], skb); + } + + if ((++card->evtbd_rdptr & MWIFIEX_EVTBD_MASK) == MWIFIEX_MAX_EVT_BD) { + card->evtbd_rdptr = ((card->evtbd_rdptr & + reg->evt_rollover_ind) ^ + reg->evt_rollover_ind); + } + + dev_dbg(adapter->dev, "info: Updated <Rd: 0x%x, Wr: 0x%x>", + card->evtbd_rdptr, wrptr); + + /* Write the event ring read pointer in to reg->evt_rdptr */ + if (mwifiex_write_reg(adapter, reg->evt_rdptr, + card->evtbd_rdptr)) { + dev_err(adapter->dev, + "event_complete: failed to read reg->evt_rdptr\n"); + return -1; + } + + dev_dbg(adapter->dev, "info: Check Events Again\n"); + ret = mwifiex_pcie_process_event_ready(adapter); + + return ret; +} + +/* + * This function downloads the firmware to the card. + * + * Firmware is downloaded to the card in blocks. Every block download + * is tested for CRC errors, and retried a number of times before + * returning failure. + */ +static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter, + struct mwifiex_fw_image *fw) +{ + int ret; + u8 *firmware = fw->fw_buf; + u32 firmware_len = fw->fw_len; + u32 offset = 0; + struct sk_buff *skb; + u32 txlen, tx_blocks = 0, tries, len; + u32 block_retry_cnt = 0; + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + + if (!firmware || !firmware_len) { + dev_err(adapter->dev, + "No firmware image found! Terminating download\n"); + return -1; + } + + dev_dbg(adapter->dev, "info: Downloading FW image (%d bytes)\n", + firmware_len); + + if (mwifiex_pcie_disable_host_int(adapter)) { + dev_err(adapter->dev, + "%s: Disabling interrupts failed.\n", __func__); + return -1; + } + + skb = dev_alloc_skb(MWIFIEX_UPLD_SIZE); + if (!skb) { + ret = -ENOMEM; + goto done; + } + + /* Perform firmware data transfer */ + do { + u32 ireg_intr = 0; + + /* More data? */ + if (offset >= firmware_len) + break; + + for (tries = 0; tries < MAX_POLL_TRIES; tries++) { + ret = mwifiex_read_reg(adapter, reg->cmd_size, + &len); + if (ret) { + dev_warn(adapter->dev, + "Failed reading len from boot code\n"); + goto done; + } + if (len) + break; + usleep_range(10, 20); + } + + if (!len) { + break; + } else if (len > MWIFIEX_UPLD_SIZE) { + pr_err("FW download failure @ %d, invalid length %d\n", + offset, len); + ret = -1; + goto done; + } + + txlen = len; + + if (len & BIT(0)) { + block_retry_cnt++; + if (block_retry_cnt > MAX_WRITE_IOMEM_RETRY) { + pr_err("FW download failure @ %d, over max " + "retry count\n", offset); + ret = -1; + goto done; + } + dev_err(adapter->dev, "FW CRC error indicated by the " + "helper: len = 0x%04X, txlen = %d\n", + len, txlen); + len &= ~BIT(0); + /* Setting this to 0 to resend from same offset */ + txlen = 0; + } else { + block_retry_cnt = 0; + /* Set blocksize to transfer - checking for + last block */ + if (firmware_len - offset < txlen) + txlen = firmware_len - offset; + + dev_dbg(adapter->dev, "."); + + tx_blocks = (txlen + card->pcie.blksz_fw_dl - 1) / + card->pcie.blksz_fw_dl; + + /* Copy payload to buffer */ + memmove(skb->data, &firmware[offset], txlen); + } + + skb_put(skb, MWIFIEX_UPLD_SIZE - skb->len); + skb_trim(skb, tx_blocks * card->pcie.blksz_fw_dl); + + /* Send the boot command to device */ + if (mwifiex_pcie_send_boot_cmd(adapter, skb)) { + dev_err(adapter->dev, + "Failed to send firmware download command\n"); + ret = -1; + goto done; + } + + /* Wait for the command done interrupt */ + do { + if (mwifiex_read_reg(adapter, PCIE_CPU_INT_STATUS, + &ireg_intr)) { + dev_err(adapter->dev, "%s: Failed to read " + "interrupt status during fw dnld.\n", + __func__); + mwifiex_unmap_pci_memory(adapter, skb, + PCI_DMA_TODEVICE); + ret = -1; + goto done; + } + } while ((ireg_intr & CPU_INTR_DOOR_BELL) == + CPU_INTR_DOOR_BELL); + + mwifiex_unmap_pci_memory(adapter, skb, PCI_DMA_TODEVICE); + + offset += txlen; + } while (true); + + dev_notice(adapter->dev, + "info: FW download over, size %d bytes\n", offset); + + ret = 0; + +done: + dev_kfree_skb_any(skb); + return ret; +} + +/* + * This function checks the firmware status in card. + * + * The winner interface is also determined by this function. + */ +static int +mwifiex_check_fw_status(struct mwifiex_adapter *adapter, u32 poll_num) +{ + int ret = 0; + u32 firmware_stat, winner_status; + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + u32 tries; + + /* Mask spurios interrupts */ + if (mwifiex_write_reg(adapter, PCIE_HOST_INT_STATUS_MASK, + HOST_INTR_MASK)) { + dev_warn(adapter->dev, "Write register failed\n"); + return -1; + } + + dev_dbg(adapter->dev, "Setting driver ready signature\n"); + if (mwifiex_write_reg(adapter, reg->drv_rdy, + FIRMWARE_READY_PCIE)) { + dev_err(adapter->dev, + "Failed to write driver ready signature\n"); + return -1; + } + + /* Wait for firmware initialization event */ + for (tries = 0; tries < poll_num; tries++) { + if (mwifiex_read_reg(adapter, reg->fw_status, + &firmware_stat)) + ret = -1; + else + ret = 0; + if (ret) + continue; + if (firmware_stat == FIRMWARE_READY_PCIE) { + ret = 0; + break; + } else { + msleep(100); + ret = -1; + } + } + + if (ret) { + if (mwifiex_read_reg(adapter, reg->fw_status, + &winner_status)) + ret = -1; + else if (!winner_status) { + dev_err(adapter->dev, "PCI-E is the winner\n"); + adapter->winner = 1; + } else { + dev_err(adapter->dev, + "PCI-E is not the winner <%#x,%d>, exit dnld\n", + ret, adapter->winner); + } + } + + return ret; +} + +/* + * This function reads the interrupt status from card. + */ +static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter) +{ + u32 pcie_ireg; + unsigned long flags; + + if (!mwifiex_pcie_ok_to_access_hw(adapter)) + return; + + if (mwifiex_read_reg(adapter, PCIE_HOST_INT_STATUS, &pcie_ireg)) { + dev_warn(adapter->dev, "Read register failed\n"); + return; + } + + if ((pcie_ireg != 0xFFFFFFFF) && (pcie_ireg)) { + + mwifiex_pcie_disable_host_int(adapter); + + /* Clear the pending interrupts */ + if (mwifiex_write_reg(adapter, PCIE_HOST_INT_STATUS, + ~pcie_ireg)) { + dev_warn(adapter->dev, "Write register failed\n"); + return; + } + spin_lock_irqsave(&adapter->int_lock, flags); + adapter->int_status |= pcie_ireg; + spin_unlock_irqrestore(&adapter->int_lock, flags); + + if (!adapter->pps_uapsd_mode && + adapter->ps_state == PS_STATE_SLEEP && + mwifiex_pcie_ok_to_access_hw(adapter)) { + /* Potentially for PCIe we could get other + * interrupts like shared. Don't change power + * state until cookie is set */ + adapter->ps_state = PS_STATE_AWAKE; + adapter->pm_wakeup_fw_try = false; + del_timer(&adapter->wakeup_timer); + } + } +} + +/* + * Interrupt handler for PCIe root port + * + * This function reads the interrupt status from firmware and assigns + * the main process in workqueue which will handle the interrupt. + */ +static irqreturn_t mwifiex_pcie_interrupt(int irq, void *context) +{ + struct pci_dev *pdev = (struct pci_dev *)context; + struct pcie_service_card *card; + struct mwifiex_adapter *adapter; + + if (!pdev) { + pr_debug("info: %s: pdev is NULL\n", (u8 *)pdev); + goto exit; + } + + card = pci_get_drvdata(pdev); + if (!card || !card->adapter) { + pr_debug("info: %s: card=%p adapter=%p\n", __func__, card, + card ? card->adapter : NULL); + goto exit; + } + adapter = card->adapter; + + if (adapter->surprise_removed) + goto exit; + + mwifiex_interrupt_status(adapter); + mwifiex_queue_main_work(adapter); + +exit: + return IRQ_HANDLED; +} + +/* + * This function checks the current interrupt status. + * + * The following interrupts are checked and handled by this function - + * - Data sent + * - Command sent + * - Command received + * - Packets received + * - Events received + * + * In case of Rx packets received, the packets are uploaded from card to + * host and processed accordingly. + */ +static int mwifiex_process_int_status(struct mwifiex_adapter *adapter) +{ + int ret; + u32 pcie_ireg; + unsigned long flags; + + spin_lock_irqsave(&adapter->int_lock, flags); + /* Clear out unused interrupts */ + pcie_ireg = adapter->int_status; + adapter->int_status = 0; + spin_unlock_irqrestore(&adapter->int_lock, flags); + + while (pcie_ireg & HOST_INTR_MASK) { + if (pcie_ireg & HOST_INTR_DNLD_DONE) { + pcie_ireg &= ~HOST_INTR_DNLD_DONE; + dev_dbg(adapter->dev, "info: TX DNLD Done\n"); + ret = mwifiex_pcie_send_data_complete(adapter); + if (ret) + return ret; + } + if (pcie_ireg & HOST_INTR_UPLD_RDY) { + pcie_ireg &= ~HOST_INTR_UPLD_RDY; + dev_dbg(adapter->dev, "info: Rx DATA\n"); + ret = mwifiex_pcie_process_recv_data(adapter); + if (ret) + return ret; + } + if (pcie_ireg & HOST_INTR_EVENT_RDY) { + pcie_ireg &= ~HOST_INTR_EVENT_RDY; + dev_dbg(adapter->dev, "info: Rx EVENT\n"); + ret = mwifiex_pcie_process_event_ready(adapter); + if (ret) + return ret; + } + + if (pcie_ireg & HOST_INTR_CMD_DONE) { + pcie_ireg &= ~HOST_INTR_CMD_DONE; + if (adapter->cmd_sent) { + dev_dbg(adapter->dev, + "info: CMD sent Interrupt\n"); + adapter->cmd_sent = false; + } + /* Handle command response */ + ret = mwifiex_pcie_process_cmd_complete(adapter); + if (ret) + return ret; + } + + if (mwifiex_pcie_ok_to_access_hw(adapter)) { + if (mwifiex_read_reg(adapter, PCIE_HOST_INT_STATUS, + &pcie_ireg)) { + dev_warn(adapter->dev, + "Read register failed\n"); + return -1; + } + + if ((pcie_ireg != 0xFFFFFFFF) && (pcie_ireg)) { + if (mwifiex_write_reg(adapter, + PCIE_HOST_INT_STATUS, + ~pcie_ireg)) { + dev_warn(adapter->dev, + "Write register failed\n"); + return -1; + } + } + + } + } + dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n", + adapter->cmd_sent, adapter->data_sent); + if (adapter->ps_state != PS_STATE_SLEEP) + mwifiex_pcie_enable_host_int(adapter); + + return 0; +} + +/* + * This function downloads data from driver to card. + * + * Both commands and data packets are transferred to the card by this + * function. + * + * This function adds the PCIE specific header to the front of the buffer + * before transferring. The header contains the length of the packet and + * the type. The firmware handles the packets based upon this set type. + */ +static int mwifiex_pcie_host_to_card(struct mwifiex_adapter *adapter, u8 type, + struct sk_buff *skb, + struct mwifiex_tx_param *tx_param) +{ + if (!skb) { + dev_err(adapter->dev, "Passed NULL skb to %s\n", __func__); + return -1; + } + + if (type == MWIFIEX_TYPE_DATA) + return mwifiex_pcie_send_data(adapter, skb, tx_param); + else if (type == MWIFIEX_TYPE_CMD) + return mwifiex_pcie_send_cmd(adapter, skb); + + return 0; +} + +/* This function read/write firmware */ +static enum rdwr_status +mwifiex_pcie_rdwr_firmware(struct mwifiex_adapter *adapter, u8 doneflag) +{ + int ret, tries; + u8 ctrl_data; + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + + ret = mwifiex_write_reg(adapter, reg->fw_dump_ctrl, FW_DUMP_HOST_READY); + if (ret) { + dev_err(adapter->dev, "PCIE write err\n"); + return RDWR_STATUS_FAILURE; + } + + for (tries = 0; tries < MAX_POLL_TRIES; tries++) { + mwifiex_read_reg_byte(adapter, reg->fw_dump_ctrl, &ctrl_data); + if (ctrl_data == FW_DUMP_DONE) + return RDWR_STATUS_SUCCESS; + if (doneflag && ctrl_data == doneflag) + return RDWR_STATUS_DONE; + if (ctrl_data != FW_DUMP_HOST_READY) { + dev_info(adapter->dev, + "The ctrl reg was changed, re-try again!\n"); + ret = mwifiex_write_reg(adapter, reg->fw_dump_ctrl, + FW_DUMP_HOST_READY); + if (ret) { + dev_err(adapter->dev, "PCIE write err\n"); + return RDWR_STATUS_FAILURE; + } + } + usleep_range(100, 200); + } + + dev_err(adapter->dev, "Fail to pull ctrl_data\n"); + return RDWR_STATUS_FAILURE; +} + +/* This function dump firmware memory to file */ +static void mwifiex_pcie_fw_dump_work(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *creg = card->pcie.reg; + unsigned int reg, reg_start, reg_end; + u8 *dbg_ptr, *end_ptr, dump_num, idx, i, read_reg, doneflag = 0; + enum rdwr_status stat; + u32 memory_size; + int ret; + static char *env[] = { "DRIVER=mwifiex_pcie", "EVENT=fw_dump", NULL }; + + if (!card->pcie.can_dump_fw) + return; + + for (idx = 0; idx < ARRAY_SIZE(mem_type_mapping_tbl); idx++) { + struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx]; + + if (entry->mem_ptr) { + vfree(entry->mem_ptr); + entry->mem_ptr = NULL; + } + entry->mem_size = 0; + } + + dev_info(adapter->dev, "== mwifiex firmware dump start ==\n"); + + /* Read the number of the memories which will dump */ + stat = mwifiex_pcie_rdwr_firmware(adapter, doneflag); + if (stat == RDWR_STATUS_FAILURE) + goto done; + + reg = creg->fw_dump_start; + mwifiex_read_reg_byte(adapter, reg, &dump_num); + + /* Read the length of every memory which will dump */ + for (idx = 0; idx < dump_num; idx++) { + struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx]; + + stat = mwifiex_pcie_rdwr_firmware(adapter, doneflag); + if (stat == RDWR_STATUS_FAILURE) + goto done; + + memory_size = 0; + reg = creg->fw_dump_start; + for (i = 0; i < 4; i++) { + mwifiex_read_reg_byte(adapter, reg, &read_reg); + memory_size |= (read_reg << (i * 8)); + reg++; + } + + if (memory_size == 0) { + dev_info(adapter->dev, "Firmware dump Finished!\n"); + ret = mwifiex_write_reg(adapter, creg->fw_dump_ctrl, + FW_DUMP_READ_DONE); + if (ret) { + dev_err(adapter->dev, "PCIE write err\n"); + goto done; + } + break; + } + + dev_info(adapter->dev, + "%s_SIZE=0x%x\n", entry->mem_name, memory_size); + entry->mem_ptr = vmalloc(memory_size + 1); + entry->mem_size = memory_size; + if (!entry->mem_ptr) { + dev_err(adapter->dev, + "Vmalloc %s failed\n", entry->mem_name); + goto done; + } + dbg_ptr = entry->mem_ptr; + end_ptr = dbg_ptr + memory_size; + + doneflag = entry->done_flag; + dev_info(adapter->dev, "Start %s output, please wait...\n", + entry->mem_name); + + do { + stat = mwifiex_pcie_rdwr_firmware(adapter, doneflag); + if (RDWR_STATUS_FAILURE == stat) + goto done; + + reg_start = creg->fw_dump_start; + reg_end = creg->fw_dump_end; + for (reg = reg_start; reg <= reg_end; reg++) { + mwifiex_read_reg_byte(adapter, reg, dbg_ptr); + if (dbg_ptr < end_ptr) { + dbg_ptr++; + } else { + dev_err(adapter->dev, + "Allocated buf not enough\n"); + goto done; + } + } + + if (stat != RDWR_STATUS_DONE) + continue; + + dev_info(adapter->dev, "%s done: size=0x%tx\n", + entry->mem_name, dbg_ptr - entry->mem_ptr); + break; + } while (true); + } + dev_info(adapter->dev, "== mwifiex firmware dump end ==\n"); + + kobject_uevent_env(&adapter->wiphy->dev.kobj, KOBJ_CHANGE, env); + +done: + adapter->curr_mem_idx = 0; +} + +static unsigned long iface_work_flags; +static struct mwifiex_adapter *save_adapter; +static void mwifiex_pcie_work(struct work_struct *work) +{ + if (test_and_clear_bit(MWIFIEX_IFACE_WORK_FW_DUMP, + &iface_work_flags)) + mwifiex_pcie_fw_dump_work(save_adapter); +} + +static DECLARE_WORK(pcie_work, mwifiex_pcie_work); +/* This function dumps FW information */ +static void mwifiex_pcie_fw_dump(struct mwifiex_adapter *adapter) +{ + save_adapter = adapter; + if (test_bit(MWIFIEX_IFACE_WORK_FW_DUMP, &iface_work_flags)) + return; + + set_bit(MWIFIEX_IFACE_WORK_FW_DUMP, &iface_work_flags); + + schedule_work(&pcie_work); +} + +/* + * This function initializes the PCI-E host memory space, WCB rings, etc. + * + * The following initializations steps are followed - + * - Allocate TXBD ring buffers + * - Allocate RXBD ring buffers + * - Allocate event BD ring buffers + * - Allocate command response ring buffer + * - Allocate sleep cookie buffer + */ +static int mwifiex_pcie_init(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + int ret; + struct pci_dev *pdev = card->dev; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + + pci_set_drvdata(pdev, card); + + ret = pci_enable_device(pdev); + if (ret) + goto err_enable_dev; + + pci_set_master(pdev); + + dev_dbg(adapter->dev, "try set_consistent_dma_mask(32)\n"); + ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); + if (ret) { + dev_err(adapter->dev, "set_dma_mask(32) failed\n"); + goto err_set_dma_mask; + } + + ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); + if (ret) { + dev_err(adapter->dev, "set_consistent_dma_mask(64) failed\n"); + goto err_set_dma_mask; + } + + ret = pci_request_region(pdev, 0, DRV_NAME); + if (ret) { + dev_err(adapter->dev, "req_reg(0) error\n"); + goto err_req_region0; + } + card->pci_mmap = pci_iomap(pdev, 0, 0); + if (!card->pci_mmap) { + dev_err(adapter->dev, "iomap(0) error\n"); + ret = -EIO; + goto err_iomap0; + } + ret = pci_request_region(pdev, 2, DRV_NAME); + if (ret) { + dev_err(adapter->dev, "req_reg(2) error\n"); + goto err_req_region2; + } + card->pci_mmap1 = pci_iomap(pdev, 2, 0); + if (!card->pci_mmap1) { + dev_err(adapter->dev, "iomap(2) error\n"); + ret = -EIO; + goto err_iomap2; + } + + dev_dbg(adapter->dev, + "PCI memory map Virt0: %p PCI memory map Virt2: %p\n", + card->pci_mmap, card->pci_mmap1); + + card->cmdrsp_buf = NULL; + ret = mwifiex_pcie_create_txbd_ring(adapter); + if (ret) + goto err_cre_txbd; + ret = mwifiex_pcie_create_rxbd_ring(adapter); + if (ret) + goto err_cre_rxbd; + ret = mwifiex_pcie_create_evtbd_ring(adapter); + if (ret) + goto err_cre_evtbd; + ret = mwifiex_pcie_alloc_cmdrsp_buf(adapter); + if (ret) + goto err_alloc_cmdbuf; + if (reg->sleep_cookie) { + ret = mwifiex_pcie_alloc_sleep_cookie_buf(adapter); + if (ret) + goto err_alloc_cookie; + } else { + card->sleep_cookie_vbase = NULL; + } + return ret; + +err_alloc_cookie: + mwifiex_pcie_delete_cmdrsp_buf(adapter); +err_alloc_cmdbuf: + mwifiex_pcie_delete_evtbd_ring(adapter); +err_cre_evtbd: + mwifiex_pcie_delete_rxbd_ring(adapter); +err_cre_rxbd: + mwifiex_pcie_delete_txbd_ring(adapter); +err_cre_txbd: + pci_iounmap(pdev, card->pci_mmap1); +err_iomap2: + pci_release_region(pdev, 2); +err_req_region2: + pci_iounmap(pdev, card->pci_mmap); +err_iomap0: + pci_release_region(pdev, 0); +err_req_region0: +err_set_dma_mask: + pci_disable_device(pdev); +err_enable_dev: + pci_set_drvdata(pdev, NULL); + return ret; +} + +/* + * This function cleans up the allocated card buffers. + * + * The following are freed by this function - + * - TXBD ring buffers + * - RXBD ring buffers + * - Event BD ring buffers + * - Command response ring buffer + * - Sleep cookie buffer + */ +static void mwifiex_pcie_cleanup(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + struct pci_dev *pdev = card->dev; + const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; + + if (user_rmmod) { + dev_dbg(adapter->dev, "Clearing driver ready signature\n"); + if (mwifiex_write_reg(adapter, reg->drv_rdy, 0x00000000)) + dev_err(adapter->dev, + "Failed to write driver not-ready signature\n"); + } + + if (pdev) { + pci_iounmap(pdev, card->pci_mmap); + pci_iounmap(pdev, card->pci_mmap1); + pci_disable_device(pdev); + pci_release_region(pdev, 2); + pci_release_region(pdev, 0); + pci_set_drvdata(pdev, NULL); + } + kfree(card); +} + +/* + * This function registers the PCIE device. + * + * PCIE IRQ is claimed, block size is set and driver data is initialized. + */ +static int mwifiex_register_dev(struct mwifiex_adapter *adapter) +{ + int ret; + struct pcie_service_card *card = adapter->card; + struct pci_dev *pdev = card->dev; + + /* save adapter pointer in card */ + card->adapter = adapter; + + ret = request_irq(pdev->irq, mwifiex_pcie_interrupt, IRQF_SHARED, + "MRVL_PCIE", pdev); + if (ret) { + pr_err("request_irq failed: ret=%d\n", ret); + adapter->card = NULL; + return -1; + } + + adapter->dev = &pdev->dev; + adapter->tx_buf_size = card->pcie.tx_buf_size; + adapter->mem_type_mapping_tbl = mem_type_mapping_tbl; + adapter->num_mem_types = ARRAY_SIZE(mem_type_mapping_tbl); + strcpy(adapter->fw_name, card->pcie.firmware); + adapter->ext_scan = card->pcie.can_ext_scan; + + return 0; +} + +/* + * This function unregisters the PCIE device. + * + * The PCIE IRQ is released, the function is disabled and driver + * data is set to null. + */ +static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + const struct mwifiex_pcie_card_reg *reg; + + if (card) { + dev_dbg(adapter->dev, "%s(): calling free_irq()\n", __func__); + free_irq(card->dev->irq, card->dev); + + reg = card->pcie.reg; + if (reg->sleep_cookie) + mwifiex_pcie_delete_sleep_cookie_buf(adapter); + + mwifiex_pcie_delete_cmdrsp_buf(adapter); + mwifiex_pcie_delete_evtbd_ring(adapter); + mwifiex_pcie_delete_rxbd_ring(adapter); + mwifiex_pcie_delete_txbd_ring(adapter); + card->cmdrsp_buf = NULL; + } +} + +static struct mwifiex_if_ops pcie_ops = { + .init_if = mwifiex_pcie_init, + .cleanup_if = mwifiex_pcie_cleanup, + .check_fw_status = mwifiex_check_fw_status, + .prog_fw = mwifiex_prog_fw_w_helper, + .register_dev = mwifiex_register_dev, + .unregister_dev = mwifiex_unregister_dev, + .enable_int = mwifiex_pcie_enable_host_int, + .process_int_status = mwifiex_process_int_status, + .host_to_card = mwifiex_pcie_host_to_card, + .wakeup = mwifiex_pm_wakeup_card, + .wakeup_complete = mwifiex_pm_wakeup_card_complete, + + /* PCIE specific */ + .cmdrsp_complete = mwifiex_pcie_cmdrsp_complete, + .event_complete = mwifiex_pcie_event_complete, + .update_mp_end_port = NULL, + .cleanup_mpa_buf = NULL, + .init_fw_port = mwifiex_pcie_init_fw_port, + .clean_pcie_ring = mwifiex_clean_pcie_ring_buf, + .fw_dump = mwifiex_pcie_fw_dump, +}; + +/* + * This function initializes the PCIE driver module. + * + * This initiates the semaphore and registers the device with + * PCIE bus. + */ +static int mwifiex_pcie_init_module(void) +{ + int ret; + + pr_debug("Marvell PCIe Driver\n"); + + sema_init(&add_remove_card_sem, 1); + + /* Clear the flag in case user removes the card. */ + user_rmmod = 0; + + ret = pci_register_driver(&mwifiex_pcie); + if (ret) + pr_err("Driver register failed!\n"); + else + pr_debug("info: Driver registered successfully!\n"); + + return ret; +} + +/* + * This function cleans up the PCIE driver. + * + * The following major steps are followed for cleanup - + * - Resume the device if its suspended + * - Disconnect the device if connected + * - Shutdown the firmware + * - Unregister the device from PCIE bus. + */ +static void mwifiex_pcie_cleanup_module(void) +{ + if (!down_interruptible(&add_remove_card_sem)) + up(&add_remove_card_sem); + + /* Set the flag as user is removing this module. */ + user_rmmod = 1; + + cancel_work_sync(&pcie_work); + pci_unregister_driver(&mwifiex_pcie); +} + +module_init(mwifiex_pcie_init_module); +module_exit(mwifiex_pcie_cleanup_module); + +MODULE_AUTHOR("Marvell International Ltd."); +MODULE_DESCRIPTION("Marvell WiFi-Ex PCI-Express Driver version " PCIE_VERSION); +MODULE_VERSION(PCIE_VERSION); +MODULE_LICENSE("GPL v2"); +MODULE_FIRMWARE(PCIE8766_DEFAULT_FW_NAME); +MODULE_FIRMWARE(PCIE8897_DEFAULT_FW_NAME); |