diff options
Diffstat (limited to 'drivers/net/wireless/mwifiex/pcie.c')
| -rw-r--r-- | drivers/net/wireless/mwifiex/pcie.c | 1948 |
1 files changed, 1948 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/pcie.c b/drivers/net/wireless/mwifiex/pcie.c new file mode 100644 index 00000000000..d34acf082d3 --- /dev/null +++ b/drivers/net/wireless/mwifiex/pcie.c @@ -0,0 +1,1948 @@ +/* + * Marvell Wireless LAN device driver: PCIE specific handling + * + * Copyright (C) 2011, 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 int mwifiex_pcie_enable_host_int(struct mwifiex_adapter *adapter); +static int mwifiex_pcie_resume(struct pci_dev *pdev); + +/* + * This function is called after skb allocation to update + * "skb->cb" with physical address of data pointer. + */ +static phys_addr_t *mwifiex_update_sk_buff_pa(struct sk_buff *skb) +{ + phys_addr_t *buf_pa = MWIFIEX_SKB_PACB(skb); + + *buf_pa = (phys_addr_t)virt_to_phys(skb->data); + + return buf_pa; +} + +/* + * 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; + + if (card->sleep_cookie) { + cookie_addr = (u32 *)card->sleep_cookie->data; + dev_dbg(adapter->dev, "info: ACCESS_HW: sleep cookie=0x%x\n", + *cookie_addr); + if (*cookie_addr == FW_AWAKE_COOKIE) + return true; + } + + return false; +} + +/* + * 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) { + pr_err("%s: failed to alloc memory\n", __func__); + return -ENOMEM; + } + + card->dev = pdev; + + 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; + int i; + + card = pci_get_drvdata(pdev); + if (!card) + return; + + adapter = card->adapter; + if (!adapter || !adapter->priv_num) + return; + + if (user_rmmod) { +#ifdef CONFIG_PM + if (adapter->is_suspended) + mwifiex_pcie_resume(pdev); +#endif + + for (i = 0; i < adapter->priv_num; i++) + if ((GET_BSS_ROLE(adapter->priv[i]) == + MWIFIEX_BSS_ROLE_STA) && + adapter->priv[i]->media_connected) + mwifiex_deauthenticate(adapter->priv[i], NULL); + + mwifiex_disable_auto_ds(mwifiex_get_priv(adapter, + MWIFIEX_BSS_ROLE_ANY)); + + mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter, + MWIFIEX_BSS_ROLE_ANY), + MWIFIEX_FUNC_SHUTDOWN); + } + + mwifiex_remove_card(card->adapter, &add_remove_card_sem); + kfree(card); +} + +/* + * 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 pci_dev *pdev, pm_message_t state) +{ + struct mwifiex_adapter *adapter; + struct pcie_service_card *card; + int hs_actived, i; + + if (pdev) { + card = (struct pcie_service_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; + + for (i = 0; i < adapter->priv_num; i++) + netif_carrier_off(adapter->priv[i]->netdev); + + 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 pci_dev *pdev) +{ + struct mwifiex_adapter *adapter; + struct pcie_service_card *card; + int i; + + if (pdev) { + card = (struct pcie_service_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; + + for (i = 0; i < adapter->priv_num; i++) + if (adapter->priv[i]->media_connected) + netif_carrier_on(adapter->priv[i]->netdev); + + mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), + MWIFIEX_ASYNC_CMD); + + return 0; +} + +#define PCIE_VENDOR_ID_MARVELL (0x11ab) +#define PCIE_DEVICE_ID_MARVELL_88W8766P (0x2b30) + +static DEFINE_PCI_DEVICE_TABLE(mwifiex_ids) = { + { + PCIE_VENDOR_ID_MARVELL, PCIE_DEVICE_ID_MARVELL_88W8766P, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + }, + {}, +}; + +MODULE_DEVICE_TABLE(pci, mwifiex_ids); + +/* 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 + /* Power Management Hooks */ + .suspend = mwifiex_pcie_suspend, + .resume = mwifiex_pcie_resume, +#endif +}; + +/* + * 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 wakes up the card. + * + * A host power up command is written to the card configuration + * register to wake up the card. + */ +static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter) +{ + int i = 0; + + while (mwifiex_pcie_ok_to_access_hw(adapter)) { + i++; + udelay(10); + /* 50ms max wait */ + if (i == 50000) + break; + } + + dev_dbg(adapter->dev, "event: Wakeup device...\n"); + + /* Enable interrupts or any chip access will wakeup device */ + if (mwifiex_write_reg(adapter, PCIE_HOST_INT_MASK, HOST_INTR_MASK)) { + dev_warn(adapter->dev, "Enable host interrupt failed\n"); + return -1; + } + + 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 creates buffer descriptor ring for TX + */ +static int mwifiex_pcie_create_txbd_ring(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + struct sk_buff *skb; + int i; + phys_addr_t *buf_pa; + + /* + * 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; + card->txbd_rdptr |= MWIFIEX_BD_FLAG_ROLLOVER_IND; + + /* allocate shared memory for the BD ring and divide the same in to + several descriptors */ + 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 = kzalloc(card->txbd_ring_size, GFP_KERNEL); + if (!card->txbd_ring_vbase) { + dev_err(adapter->dev, "Unable to allocate buffer for txbd ring.\n"); + kfree(card->txbd_ring_vbase); + return -1; + } + card->txbd_ring_pbase = virt_to_phys(card->txbd_ring_vbase); + + dev_dbg(adapter->dev, "info: txbd_ring - base: %p, pbase: %#x:%x," + "len: %x\n", card->txbd_ring_vbase, + (u32)card->txbd_ring_pbase, + (u32)((u64)card->txbd_ring_pbase >> 32), + card->txbd_ring_size); + + for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) { + card->txbd_ring[i] = (struct mwifiex_pcie_buf_desc *) + (card->txbd_ring_vbase + + (sizeof(struct mwifiex_pcie_buf_desc) * i)); + + /* Allocate buffer here so that firmware can DMA data from it */ + skb = dev_alloc_skb(MWIFIEX_RX_DATA_BUF_SIZE); + if (!skb) { + dev_err(adapter->dev, "Unable to allocate skb for TX ring.\n"); + kfree(card->txbd_ring_vbase); + return -ENOMEM; + } + buf_pa = mwifiex_update_sk_buff_pa(skb); + + skb_put(skb, MWIFIEX_RX_DATA_BUF_SIZE); + dev_dbg(adapter->dev, "info: TX ring: add new skb base: %p, " + "buf_base: %p, buf_pbase: %#x:%x, " + "buf_len: %#x\n", skb, skb->data, + (u32)*buf_pa, (u32)(((u64)*buf_pa >> 32)), + skb->len); + + card->tx_buf_list[i] = skb; + card->txbd_ring[i]->paddr = *buf_pa; + card->txbd_ring[i]->len = (u16)skb->len; + card->txbd_ring[i]->flags = 0; + } + + return 0; +} + +static int mwifiex_pcie_delete_txbd_ring(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + int i; + + for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) { + if (card->tx_buf_list[i]) + dev_kfree_skb_any(card->tx_buf_list[i]); + card->tx_buf_list[i] = NULL; + card->txbd_ring[i]->paddr = 0; + card->txbd_ring[i]->len = 0; + card->txbd_ring[i]->flags = 0; + card->txbd_ring[i] = NULL; + } + + kfree(card->txbd_ring_vbase); + card->txbd_ring_size = 0; + card->txbd_wrptr = 0; + card->txbd_rdptr = 0 | MWIFIEX_BD_FLAG_ROLLOVER_IND; + card->txbd_ring_vbase = NULL; + + 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; + struct sk_buff *skb; + int i; + phys_addr_t *buf_pa; + + /* + * 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 |= MWIFIEX_BD_FLAG_ROLLOVER_IND; + + 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 = kzalloc(card->rxbd_ring_size, GFP_KERNEL); + if (!card->rxbd_ring_vbase) { + dev_err(adapter->dev, "Unable to allocate buffer for " + "rxbd_ring.\n"); + return -1; + } + card->rxbd_ring_pbase = virt_to_phys(card->rxbd_ring_vbase); + + 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); + + for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) { + card->rxbd_ring[i] = (struct mwifiex_pcie_buf_desc *) + (card->rxbd_ring_vbase + + (sizeof(struct mwifiex_pcie_buf_desc) * i)); + + /* Allocate skb here so that firmware can DMA data from it */ + skb = dev_alloc_skb(MWIFIEX_RX_DATA_BUF_SIZE); + if (!skb) { + dev_err(adapter->dev, "Unable to allocate skb for RX ring.\n"); + kfree(card->rxbd_ring_vbase); + return -ENOMEM; + } + buf_pa = mwifiex_update_sk_buff_pa(skb); + skb_put(skb, MWIFIEX_RX_DATA_BUF_SIZE); + + dev_dbg(adapter->dev, "info: RX ring: add new skb base: %p, " + "buf_base: %p, buf_pbase: %#x:%x, " + "buf_len: %#x\n", skb, skb->data, + (u32)*buf_pa, (u32)((u64)*buf_pa >> 32), + skb->len); + + card->rx_buf_list[i] = skb; + card->rxbd_ring[i]->paddr = *buf_pa; + card->rxbd_ring[i]->len = (u16)skb->len; + card->rxbd_ring[i]->flags = 0; + } + + return 0; +} + +/* + * 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; + int i; + + for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) { + if (card->rx_buf_list[i]) + dev_kfree_skb_any(card->rx_buf_list[i]); + card->rx_buf_list[i] = NULL; + card->rxbd_ring[i]->paddr = 0; + card->rxbd_ring[i]->len = 0; + card->rxbd_ring[i]->flags = 0; + card->rxbd_ring[i] = NULL; + } + + kfree(card->rxbd_ring_vbase); + card->rxbd_ring_size = 0; + card->rxbd_wrptr = 0; + card->rxbd_rdptr = 0 | MWIFIEX_BD_FLAG_ROLLOVER_IND; + card->rxbd_ring_vbase = NULL; + + 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; + struct sk_buff *skb; + int i; + phys_addr_t *buf_pa; + + /* + * 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 |= MWIFIEX_BD_FLAG_ROLLOVER_IND; + + card->evtbd_ring_size = sizeof(struct mwifiex_pcie_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 = kzalloc(card->evtbd_ring_size, GFP_KERNEL); + if (!card->evtbd_ring_vbase) { + dev_err(adapter->dev, "Unable to allocate buffer. " + "Terminating download\n"); + return -1; + } + card->evtbd_ring_pbase = virt_to_phys(card->evtbd_ring_vbase); + + 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); + + for (i = 0; i < MWIFIEX_MAX_EVT_BD; i++) { + card->evtbd_ring[i] = (struct mwifiex_pcie_buf_desc *) + (card->evtbd_ring_vbase + + (sizeof(struct mwifiex_pcie_buf_desc) * 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; + } + buf_pa = mwifiex_update_sk_buff_pa(skb); + skb_put(skb, MAX_EVENT_SIZE); + + dev_dbg(adapter->dev, "info: Evt ring: add new skb. base: %p, " + "buf_base: %p, buf_pbase: %#x:%x, " + "buf_len: %#x\n", skb, skb->data, + (u32)*buf_pa, (u32)((u64)*buf_pa >> 32), + skb->len); + + card->evt_buf_list[i] = skb; + card->evtbd_ring[i]->paddr = *buf_pa; + card->evtbd_ring[i]->len = (u16)skb->len; + card->evtbd_ring[i]->flags = 0; + } + + return 0; +} + +/* + * 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; + int i; + + for (i = 0; i < MWIFIEX_MAX_EVT_BD; i++) { + if (card->evt_buf_list[i]) + dev_kfree_skb_any(card->evt_buf_list[i]); + card->evt_buf_list[i] = NULL; + card->evtbd_ring[i]->paddr = 0; + card->evtbd_ring[i]->len = 0; + card->evtbd_ring[i]->flags = 0; + card->evtbd_ring[i] = NULL; + } + + kfree(card->evtbd_ring_vbase); + card->evtbd_wrptr = 0; + card->evtbd_rdptr = 0 | MWIFIEX_BD_FLAG_ROLLOVER_IND; + card->evtbd_ring_size = 0; + card->evtbd_ring_vbase = NULL; + + 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; + } + mwifiex_update_sk_buff_pa(skb); + skb_put(skb, MWIFIEX_UPLD_SIZE); + card->cmdrsp_buf = skb; + + skb = NULL; + /* Allocate memory for sending command to firmware */ + skb = dev_alloc_skb(MWIFIEX_SIZE_OF_CMD_BUFFER); + if (!skb) { + dev_err(adapter->dev, "Unable to allocate skb for command " + "data.\n"); + return -ENOMEM; + } + mwifiex_update_sk_buff_pa(skb); + skb_put(skb, MWIFIEX_SIZE_OF_CMD_BUFFER); + card->cmd_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) + dev_kfree_skb_any(card->cmdrsp_buf); + + if (card && card->cmd_buf) + dev_kfree_skb_any(card->cmd_buf); + + return 0; +} + +/* + * This function allocates a buffer for sleep cookie + */ +static int mwifiex_pcie_alloc_sleep_cookie_buf(struct mwifiex_adapter *adapter) +{ + struct sk_buff *skb; + struct pcie_service_card *card = adapter->card; + + /* Allocate memory for sleep cookie */ + skb = dev_alloc_skb(sizeof(u32)); + if (!skb) { + dev_err(adapter->dev, "Unable to allocate skb for sleep " + "cookie!\n"); + return -ENOMEM; + } + mwifiex_update_sk_buff_pa(skb); + skb_put(skb, sizeof(u32)); + + /* Init val of Sleep Cookie */ + *(u32 *)skb->data = FW_AWAKE_COOKIE; + + dev_dbg(adapter->dev, "alloc_scook: sleep cookie=0x%x\n", + *((u32 *)skb->data)); + + /* Save the sleep cookie */ + card->sleep_cookie = skb; + + 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) { + dev_kfree_skb_any(card->sleep_cookie); + card->sleep_cookie = NULL; + } + + return 0; +} + +/* + * This function sends data buffer to device + */ +static int +mwifiex_pcie_send_data(struct mwifiex_adapter *adapter, struct sk_buff *skb) +{ + struct pcie_service_card *card = adapter->card; + u32 wrindx, rdptr; + phys_addr_t *buf_pa; + __le16 *tmp; + + 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_TXBD_RDPTR, &rdptr)) { + dev_err(adapter->dev, "SEND DATA: failed to read " + "REG_TXBD_RDPTR\n"); + return -1; + } + + wrindx = card->txbd_wrptr & MWIFIEX_TXBD_MASK; + + dev_dbg(adapter->dev, "info: SEND DATA: <Rd: %#x, Wr: %#x>\n", rdptr, + card->txbd_wrptr); + if (((card->txbd_wrptr & MWIFIEX_TXBD_MASK) != + (rdptr & MWIFIEX_TXBD_MASK)) || + ((card->txbd_wrptr & MWIFIEX_BD_FLAG_ROLLOVER_IND) != + (rdptr & MWIFIEX_BD_FLAG_ROLLOVER_IND))) { + struct sk_buff *skb_data; + u8 *payload; + + adapter->data_sent = true; + skb_data = card->tx_buf_list[wrindx]; + memcpy(skb_data->data, skb->data, skb->len); + payload = skb_data->data; + tmp = (__le16 *)&payload[0]; + *tmp = cpu_to_le16((u16)skb->len); + tmp = (__le16 *)&payload[2]; + *tmp = cpu_to_le16(MWIFIEX_TYPE_DATA); + skb_put(skb_data, MWIFIEX_RX_DATA_BUF_SIZE - skb_data->len); + skb_trim(skb_data, skb->len); + buf_pa = MWIFIEX_SKB_PACB(skb_data); + card->txbd_ring[wrindx]->paddr = *buf_pa; + card->txbd_ring[wrindx]->len = (u16)skb_data->len; + card->txbd_ring[wrindx]->flags = MWIFIEX_BD_FLAG_FIRST_DESC | + MWIFIEX_BD_FLAG_LAST_DESC; + + if ((++card->txbd_wrptr & MWIFIEX_TXBD_MASK) == + MWIFIEX_MAX_TXRX_BD) + card->txbd_wrptr = ((card->txbd_wrptr & + MWIFIEX_BD_FLAG_ROLLOVER_IND) ^ + MWIFIEX_BD_FLAG_ROLLOVER_IND); + + /* Write the TX ring write pointer in to REG_TXBD_WRPTR */ + if (mwifiex_write_reg(adapter, REG_TXBD_WRPTR, + card->txbd_wrptr)) { + dev_err(adapter->dev, "SEND DATA: failed to write " + "REG_TXBD_WRPTR\n"); + return 0; + } + + /* 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 interrupt.\n"); + return -1; + } + dev_dbg(adapter->dev, "info: SEND DATA: Updated <Rd: %#x, Wr: " + "%#x> and sent packet to firmware " + "successfully\n", rdptr, + card->txbd_wrptr); + } else { + dev_dbg(adapter->dev, "info: TX Ring full, can't send anymore " + "packets to firmware\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 interrupt\n"); + return -EBUSY; + } + + return 0; +} + +/* + * 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; + u32 wrptr, rd_index; + int ret = 0; + struct sk_buff *skb_tmp = NULL; + + /* Read the RX ring Write pointer set by firmware */ + if (mwifiex_read_reg(adapter, REG_RXBD_WRPTR, &wrptr)) { + dev_err(adapter->dev, "RECV DATA: failed to read " + "REG_TXBD_RDPTR\n"); + ret = -1; + goto done; + } + + while (((wrptr & MWIFIEX_RXBD_MASK) != + (card->rxbd_rdptr & MWIFIEX_RXBD_MASK)) || + ((wrptr & MWIFIEX_BD_FLAG_ROLLOVER_IND) == + (card->rxbd_rdptr & MWIFIEX_BD_FLAG_ROLLOVER_IND))) { + struct sk_buff *skb_data; + u16 rx_len; + + rd_index = card->rxbd_rdptr & MWIFIEX_RXBD_MASK; + skb_data = card->rx_buf_list[rd_index]; + + /* Get data length from interface header - + first byte is len, second byte is type */ + rx_len = *((u16 *)skb_data->data); + dev_dbg(adapter->dev, "info: RECV DATA: Rd=%#x, Wr=%#x, " + "Len=%d\n", card->rxbd_rdptr, wrptr, rx_len); + skb_tmp = dev_alloc_skb(rx_len); + if (!skb_tmp) { + dev_dbg(adapter->dev, "info: Failed to alloc skb " + "for RX\n"); + ret = -EBUSY; + goto done; + } + + skb_put(skb_tmp, rx_len); + + memcpy(skb_tmp->data, skb_data->data + INTF_HEADER_LEN, rx_len); + if ((++card->rxbd_rdptr & MWIFIEX_RXBD_MASK) == + MWIFIEX_MAX_TXRX_BD) { + card->rxbd_rdptr = ((card->rxbd_rdptr & + MWIFIEX_BD_FLAG_ROLLOVER_IND) ^ + MWIFIEX_BD_FLAG_ROLLOVER_IND); + } + dev_dbg(adapter->dev, "info: RECV DATA: <Rd: %#x, Wr: %#x>\n", + card->rxbd_rdptr, wrptr); + + /* Write the RX ring read pointer in to REG_RXBD_RDPTR */ + if (mwifiex_write_reg(adapter, REG_RXBD_RDPTR, + card->rxbd_rdptr)) { + dev_err(adapter->dev, "RECV DATA: failed to " + "write REG_RXBD_RDPTR\n"); + ret = -1; + goto done; + } + + /* Read the RX ring Write pointer set by firmware */ + if (mwifiex_read_reg(adapter, REG_RXBD_WRPTR, &wrptr)) { + dev_err(adapter->dev, "RECV DATA: failed to read " + "REG_TXBD_RDPTR\n"); + ret = -1; + goto done; + } + dev_dbg(adapter->dev, "info: RECV DATA: Received packet from " + "firmware successfully\n"); + mwifiex_handle_rx_packet(adapter, skb_tmp); + } + +done: + if (ret && skb_tmp) + dev_kfree_skb_any(skb_tmp); + 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) +{ + phys_addr_t *buf_pa = MWIFIEX_SKB_PACB(skb); + + if (!(skb->data && skb->len && *buf_pa)) { + dev_err(adapter->dev, "Invalid parameter in %s <%p, %#x:%x, " + "%x>\n", __func__, skb->data, skb->len, + (u32)*buf_pa, (u32)((u64)*buf_pa >> 32)); + return -1; + } + + /* Write the lower 32bits of the physical address to scratch + * register 0 */ + if (mwifiex_write_reg(adapter, PCIE_SCRATCH_0_REG, (u32)*buf_pa)) { + dev_err(adapter->dev, "%s: failed to write download command " + "to boot code.\n", __func__); + return -1; + } + + /* Write the upper 32bits of the physical address to scratch + * register 1 */ + if (mwifiex_write_reg(adapter, PCIE_SCRATCH_1_REG, + (u32)((u64)*buf_pa >> 32))) { + dev_err(adapter->dev, "%s: failed to write download command " + "to boot code.\n", __func__); + return -1; + } + + /* Write the command length to scratch register 2 */ + if (mwifiex_write_reg(adapter, PCIE_SCRATCH_2_REG, skb->len)) { + dev_err(adapter->dev, "%s: failed to write command length to " + "scratch register 2\n", __func__); + 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 " + "interrupt.\n", __func__); + 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; + int ret = 0; + phys_addr_t *cmd_buf_pa; + phys_addr_t *cmdrsp_buf_pa; + + 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; + } + + /* Make sure a command buffer is available */ + if (!card->cmd_buf) { + dev_err(adapter->dev, "Command buffer not available\n"); + return -EBUSY; + } + + adapter->cmd_sent = true; + /* Copy the given skb in to DMA accessable shared buffer */ + skb_put(card->cmd_buf, MWIFIEX_SIZE_OF_CMD_BUFFER - card->cmd_buf->len); + skb_trim(card->cmd_buf, skb->len); + memcpy(card->cmd_buf->data, skb->data, skb->len); + + /* To send a command, the driver will: + 1. Write the 64bit physical address of the data buffer to + SCRATCH1 + SCRATCH0 + 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_PACB(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 command 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 command" + " to boot code.\n"); + ret = -1; + goto done; + } + } + + cmd_buf_pa = MWIFIEX_SKB_PACB(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 command " + "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 command " + "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 command length 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 " + "interrupt.\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; + int count = 0; + + dev_dbg(adapter->dev, "info: Rx CMD Response\n"); + + if (!adapter->curr_cmd) { + skb_pull(card->cmdrsp_buf, INTF_HEADER_LEN); + if (adapter->ps_state == PS_STATE_SLEEP_CFM) { + mwifiex_process_sleep_confirm_resp(adapter, + card->cmdrsp_buf->data, + card->cmdrsp_buf->len); + while (mwifiex_pcie_ok_to_access_hw(adapter) && + (count++ < 10)) + udelay(50); + } else { + dev_err(adapter->dev, "There is no command but " + "got cmdrsp\n"); + } + memcpy(adapter->upld_buf, card->cmdrsp_buf->data, + min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER, + card->cmdrsp_buf->len)); + skb_push(card->cmdrsp_buf, INTF_HEADER_LEN); + } else if (mwifiex_pcie_ok_to_access_hw(adapter)) { + skb_pull(card->cmdrsp_buf, INTF_HEADER_LEN); + adapter->curr_cmd->resp_skb = card->cmdrsp_buf; + 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 address.\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 address.\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); + } + + 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; + u32 rdptr = card->evtbd_rdptr & MWIFIEX_EVTBD_MASK; + u32 wrptr, event; + + 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_EVTBD_WRPTR, &wrptr)) { + dev_err(adapter->dev, "EventReady: failed to read REG_EVTBD_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 & MWIFIEX_BD_FLAG_ROLLOVER_IND) == + (card->evtbd_rdptr & MWIFIEX_BD_FLAG_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]; + /* 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; + card->evtbd_ring[rdptr]->paddr = 0; + card->evtbd_ring[rdptr]->len = 0; + card->evtbd_ring[rdptr]->flags = 0; + + 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. + */ + } + + 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; + int ret = 0; + u32 rdptr = card->evtbd_rdptr & MWIFIEX_EVTBD_MASK; + u32 wrptr; + phys_addr_t *buf_pa; + + if (!skb) + return 0; + + if (rdptr >= MWIFIEX_MAX_EVT_BD) + dev_err(adapter->dev, "event_complete: Invalid rdptr 0x%x\n", + rdptr); + + /* Read the event ring write pointer set by firmware */ + if (mwifiex_read_reg(adapter, REG_EVTBD_WRPTR, &wrptr)) { + dev_err(adapter->dev, "event_complete: failed to read REG_EVTBD_WRPTR\n"); + ret = -1; + goto done; + } + + if (!card->evt_buf_list[rdptr]) { + skb_push(skb, INTF_HEADER_LEN); + card->evt_buf_list[rdptr] = skb; + buf_pa = MWIFIEX_SKB_PACB(skb); + card->evtbd_ring[rdptr]->paddr = *buf_pa; + card->evtbd_ring[rdptr]->len = (u16)skb->len; + card->evtbd_ring[rdptr]->flags = 0; + skb = NULL; + } else { + dev_dbg(adapter->dev, "info: ERROR: Buffer is 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 & + MWIFIEX_BD_FLAG_ROLLOVER_IND) ^ + MWIFIEX_BD_FLAG_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_EVTBD_RDPTR */ + if (mwifiex_write_reg(adapter, REG_EVTBD_RDPTR, card->evtbd_rdptr)) { + dev_err(adapter->dev, "event_complete: failed to read REG_EVTBD_RDPTR\n"); + ret = -1; + goto done; + } + +done: + /* Free the buffer for failure case */ + if (ret && skb) + dev_kfree_skb_any(skb); + + 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; + + if (!adapter) { + pr_err("adapter structure is not valid\n"); + return -1; + } + + 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; + } + mwifiex_update_sk_buff_pa(skb); + + /* 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, PCIE_SCRATCH_2_REG, + &len); + if (ret) { + dev_warn(adapter->dev, "Failed reading length from boot code\n"); + goto done; + } + if (len) + break; + udelay(10); + } + + 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 + MWIFIEX_PCIE_BLOCK_SIZE_FW_DNLD - 1) / + MWIFIEX_PCIE_BLOCK_SIZE_FW_DNLD; + + /* Copy payload to buffer */ + memmove(skb->data, &firmware[offset], txlen); + } + + skb_put(skb, MWIFIEX_UPLD_SIZE - skb->len); + skb_trim(skb, tx_blocks * MWIFIEX_PCIE_BLOCK_SIZE_FW_DNLD); + + /* 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__); + ret = -1; + goto done; + } + } while ((ireg_intr & CPU_INTR_DOOR_BELL) == + CPU_INTR_DOOR_BELL); + offset += txlen; + } while (true); + + dev_dbg(adapter->dev, "info:\nFW 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; + 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_READY, 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, PCIE_SCRATCH_3_REG, + &firmware_stat)) + ret = -1; + else + ret = 0; + if (ret) + continue; + if (firmware_stat == FIRMWARE_READY_PCIE) { + ret = 0; + break; + } else { + mdelay(100); + ret = -1; + } + } + + if (ret) { + if (mwifiex_read_reg(adapter, PCIE_SCRATCH_3_REG, + &winner_status)) + ret = -1; + else if (!winner_status) { + dev_err(adapter->dev, "PCI-E is the winner\n"); + adapter->winner = 1; + ret = -1; + } else { + dev_err(adapter->dev, "PCI-E is not the winner <%#x, %d>, exit download\n", + ret, adapter->winner); + ret = 0; + } + } + + 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 (pcie_ireg & HOST_INTR_CMD_DONE) { + if ((adapter->ps_state == PS_STATE_SLEEP_CFM) || + (adapter->ps_state == PS_STATE_SLEEP)) { + 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; + + } + } + } else if (!adapter->pps_uapsd_mode && + adapter->ps_state == PS_STATE_SLEEP) { + /* Potentially for PCIe we could get other + * interrupts like shared. Don't change power + * state until cookie is set */ + if (mwifiex_pcie_ok_to_access_hw(adapter)) + adapter->ps_state = PS_STATE_AWAKE; + } + } +} + +/* + * 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 = (struct pcie_service_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); + queue_work(adapter->workqueue, &adapter->main_work); + +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 = 0; + unsigned long flags; + + spin_lock_irqsave(&adapter->int_lock, flags); + /* Clear out unused interrupts */ + adapter->int_status &= HOST_INTR_MASK; + spin_unlock_irqrestore(&adapter->int_lock, flags); + + while (adapter->int_status & HOST_INTR_MASK) { + if (adapter->int_status & HOST_INTR_DNLD_DONE) { + adapter->int_status &= ~HOST_INTR_DNLD_DONE; + if (adapter->data_sent) { + dev_dbg(adapter->dev, "info: DATA sent Interrupt\n"); + adapter->data_sent = false; + } + } + if (adapter->int_status & HOST_INTR_UPLD_RDY) { + adapter->int_status &= ~HOST_INTR_UPLD_RDY; + dev_dbg(adapter->dev, "info: Rx DATA\n"); + ret = mwifiex_pcie_process_recv_data(adapter); + if (ret) + return ret; + } + if (adapter->int_status & HOST_INTR_EVENT_RDY) { + adapter->int_status &= ~HOST_INTR_EVENT_RDY; + dev_dbg(adapter->dev, "info: Rx EVENT\n"); + ret = mwifiex_pcie_process_event_ready(adapter); + if (ret) + return ret; + } + + if (adapter->int_status & HOST_INTR_CMD_DONE) { + adapter->int_status &= ~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; + } + adapter->int_status |= pcie_ireg; + adapter->int_status &= HOST_INTR_MASK; + } + + } + } + dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n", + adapter->cmd_sent, adapter->data_sent); + 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 (!adapter || !skb) { + dev_err(adapter->dev, "Invalid parameter in %s <%p, %p>\n", + __func__, adapter, skb); + return -1; + } + + if (type == MWIFIEX_TYPE_DATA) + return mwifiex_pcie_send_data(adapter, skb); + else if (type == MWIFIEX_TYPE_CMD) + return mwifiex_pcie_send_cmd(adapter, skb); + + return 0; +} + +/* + * 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; + + 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"); + 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"); + 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; + ret = mwifiex_pcie_alloc_sleep_cookie_buf(adapter); + if (ret) + goto err_alloc_cookie; + + 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; + + 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; + + dev_dbg(adapter->dev, "Clearing driver ready signature\n"); + if (user_rmmod) { + if (mwifiex_write_reg(adapter, REG_DRV_READY, 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_release_regions(pdev); + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); + } +} + +/* + * 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; + strcpy(adapter->fw_name, PCIE8766_DEFAULT_FW_NAME); + + 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; + + if (card) { + dev_dbg(adapter->dev, "%s(): calling free_irq()\n", __func__); + free_irq(card->dev->irq, card->dev); + } +} + +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, +}; + +/* + * 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 8766 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; + + 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("mrvl/pcie8766_uapsta.bin"); |