1 /********************************************************************** 2 * Author: Cavium, Inc. 3 * 4 * Contact: support@cavium.com 5 * Please include "LiquidIO" in the subject. 6 * 7 * Copyright (c) 2003-2016 Cavium, Inc. 8 * 9 * This file is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License, Version 2, as 11 * published by the Free Software Foundation. 12 * 13 * This file is distributed in the hope that it will be useful, but 14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty 15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or 16 * NONINFRINGEMENT. See the GNU General Public License for more 17 * details. 18 **********************************************************************/ 19 #include <linux/pci.h> 20 #include <linux/netdevice.h> 21 #include "liquidio_common.h" 22 #include "octeon_droq.h" 23 #include "octeon_iq.h" 24 #include "response_manager.h" 25 #include "octeon_device.h" 26 #include "octeon_nic.h" 27 #include "octeon_main.h" 28 29 void * 30 octeon_alloc_soft_command_resp(struct octeon_device *oct, 31 union octeon_instr_64B *cmd, 32 u32 rdatasize) 33 { 34 struct octeon_soft_command *sc; 35 struct octeon_instr_ih3 *ih3; 36 struct octeon_instr_ih2 *ih2; 37 struct octeon_instr_irh *irh; 38 struct octeon_instr_rdp *rdp; 39 40 sc = (struct octeon_soft_command *) 41 octeon_alloc_soft_command(oct, 0, rdatasize, 0); 42 43 if (!sc) 44 return NULL; 45 46 /* Copy existing command structure into the soft command */ 47 memcpy(&sc->cmd, cmd, sizeof(union octeon_instr_64B)); 48 49 /* Add in the response related fields. Opcode and Param are already 50 * there. 51 */ 52 if (OCTEON_CN23XX_PF(oct) || OCTEON_CN23XX_VF(oct)) { 53 ih3 = (struct octeon_instr_ih3 *)&sc->cmd.cmd3.ih3; 54 rdp = (struct octeon_instr_rdp *)&sc->cmd.cmd3.rdp; 55 irh = (struct octeon_instr_irh *)&sc->cmd.cmd3.irh; 56 /*pkiih3 + irh + ossp[0] + ossp[1] + rdp + rptr = 40 bytes */ 57 ih3->fsz = LIO_SOFTCMDRESP_IH3; 58 } else { 59 ih2 = (struct octeon_instr_ih2 *)&sc->cmd.cmd2.ih2; 60 rdp = (struct octeon_instr_rdp *)&sc->cmd.cmd2.rdp; 61 irh = (struct octeon_instr_irh *)&sc->cmd.cmd2.irh; 62 /* irh + ossp[0] + ossp[1] + rdp + rptr = 40 bytes */ 63 ih2->fsz = LIO_SOFTCMDRESP_IH2; 64 } 65 66 irh->rflag = 1; /* a response is required */ 67 68 rdp->pcie_port = oct->pcie_port; 69 rdp->rlen = rdatasize; 70 71 *sc->status_word = COMPLETION_WORD_INIT; 72 73 if (OCTEON_CN23XX_PF(oct) || OCTEON_CN23XX_VF(oct)) 74 sc->cmd.cmd3.rptr = sc->dmarptr; 75 else 76 sc->cmd.cmd2.rptr = sc->dmarptr; 77 78 sc->expiry_time = jiffies + msecs_to_jiffies(LIO_SC_MAX_TMO_MS); 79 80 return sc; 81 } 82 83 int octnet_send_nic_data_pkt(struct octeon_device *oct, 84 struct octnic_data_pkt *ndata, 85 int xmit_more) 86 { 87 int ring_doorbell = !xmit_more; 88 89 return octeon_send_command(oct, ndata->q_no, ring_doorbell, &ndata->cmd, 90 ndata->buf, ndata->datasize, 91 ndata->reqtype); 92 } 93 94 static inline struct octeon_soft_command 95 *octnic_alloc_ctrl_pkt_sc(struct octeon_device *oct, 96 struct octnic_ctrl_pkt *nctrl) 97 { 98 struct octeon_soft_command *sc = NULL; 99 u8 *data; 100 u32 rdatasize; 101 u32 uddsize = 0, datasize = 0; 102 103 uddsize = (u32)(nctrl->ncmd.s.more * 8); 104 105 datasize = OCTNET_CMD_SIZE + uddsize; 106 rdatasize = 16; 107 108 sc = (struct octeon_soft_command *) 109 octeon_alloc_soft_command(oct, datasize, rdatasize, 0); 110 111 if (!sc) 112 return NULL; 113 114 data = (u8 *)sc->virtdptr; 115 116 memcpy(data, &nctrl->ncmd, OCTNET_CMD_SIZE); 117 118 octeon_swap_8B_data((u64 *)data, (OCTNET_CMD_SIZE >> 3)); 119 120 if (uddsize) { 121 /* Endian-Swap for UDD should have been done by caller. */ 122 memcpy(data + OCTNET_CMD_SIZE, nctrl->udd, uddsize); 123 } 124 125 sc->iq_no = (u32)nctrl->iq_no; 126 127 octeon_prepare_soft_command(oct, sc, OPCODE_NIC, OPCODE_NIC_CMD, 128 0, 0, 0); 129 130 init_completion(&sc->complete); 131 sc->sc_status = OCTEON_REQUEST_PENDING; 132 133 return sc; 134 } 135 136 int 137 octnet_send_nic_ctrl_pkt(struct octeon_device *oct, 138 struct octnic_ctrl_pkt *nctrl) 139 { 140 int retval; 141 struct octeon_soft_command *sc = NULL; 142 143 spin_lock_bh(&oct->cmd_resp_wqlock); 144 /* Allow only rx ctrl command to stop traffic on the chip 145 * during offline operations 146 */ 147 if ((oct->cmd_resp_state == OCT_DRV_OFFLINE) && 148 (nctrl->ncmd.s.cmd != OCTNET_CMD_RX_CTL)) { 149 spin_unlock_bh(&oct->cmd_resp_wqlock); 150 dev_err(&oct->pci_dev->dev, 151 "%s cmd:%d not processed since driver offline\n", 152 __func__, nctrl->ncmd.s.cmd); 153 return -1; 154 } 155 156 sc = octnic_alloc_ctrl_pkt_sc(oct, nctrl); 157 if (!sc) { 158 dev_err(&oct->pci_dev->dev, "%s soft command alloc failed\n", 159 __func__); 160 spin_unlock_bh(&oct->cmd_resp_wqlock); 161 return -1; 162 } 163 164 retval = octeon_send_soft_command(oct, sc); 165 if (retval == IQ_SEND_FAILED) { 166 octeon_free_soft_command(oct, sc); 167 dev_err(&oct->pci_dev->dev, "%s pf_num:%d soft command:%d send failed status: %x\n", 168 __func__, oct->pf_num, nctrl->ncmd.s.cmd, retval); 169 spin_unlock_bh(&oct->cmd_resp_wqlock); 170 return -1; 171 } 172 173 spin_unlock_bh(&oct->cmd_resp_wqlock); 174 175 if (nctrl->ncmd.s.cmdgroup == 0) { 176 switch (nctrl->ncmd.s.cmd) { 177 /* caller holds lock, can not sleep */ 178 case OCTNET_CMD_CHANGE_DEVFLAGS: 179 case OCTNET_CMD_SET_MULTI_LIST: 180 case OCTNET_CMD_SET_UC_LIST: 181 WRITE_ONCE(sc->caller_is_done, true); 182 return retval; 183 } 184 } 185 186 retval = wait_for_sc_completion_timeout(oct, sc, 0); 187 if (retval) 188 return (retval); 189 190 nctrl->sc_status = sc->sc_status; 191 retval = nctrl->sc_status; 192 if (nctrl->cb_fn) 193 nctrl->cb_fn(nctrl); 194 195 WRITE_ONCE(sc->caller_is_done, true); 196 197 return retval; 198 } 199