From d6214d7aaa9a82b206dac9e3b0665c49c522a271 Mon Sep 17 00:00:00 2001 From: Dmitry Kravkov Date: Wed, 6 Oct 2010 03:32:10 +0000 Subject: [PATCH] bnx2x: move msix table initialization to probe() Decide which interrupt mode to use (MSI-X, MSI, INTa) only once in probe() and initialize appropriate structures. Signed-off-by: Dmitry Kravkov Signed-off-by: Eilon Greenstein Signed-off-by: David S. Miller --- drivers/net/bnx2x/bnx2x.h | 3 + drivers/net/bnx2x/bnx2x_cmn.c | 206 +++++++++++++++------------------ drivers/net/bnx2x/bnx2x_cmn.h | 75 +++++++++++- drivers/net/bnx2x/bnx2x_main.c | 78 ++++++++++--- 4 files changed, 228 insertions(+), 134 deletions(-) diff --git a/drivers/net/bnx2x/bnx2x.h b/drivers/net/bnx2x/bnx2x.h index 9b78a0487791..d80809f5ffc9 100644 --- a/drivers/net/bnx2x/bnx2x.h +++ b/drivers/net/bnx2x/bnx2x.h @@ -308,6 +308,7 @@ union host_hc_status_block { struct bnx2x_fastpath { +#define BNX2X_NAPI_WEIGHT 128 struct napi_struct napi; union host_hc_status_block status_blk; /* chip independed shortcuts into sb structure */ @@ -920,8 +921,10 @@ struct bnx2x { #define USING_DAC_FLAG 0x10 #define USING_MSIX_FLAG 0x20 #define USING_MSI_FLAG 0x40 + #define TPA_ENABLE_FLAG 0x80 #define NO_MCP_FLAG 0x100 +#define DISABLE_MSI_FLAG 0x200 #define BP_NOMCP(bp) (bp->flags & NO_MCP_FLAG) #define HW_VLAN_TX_FLAG 0x400 #define HW_VLAN_RX_FLAG 0x800 diff --git a/drivers/net/bnx2x/bnx2x_cmn.c b/drivers/net/bnx2x/bnx2x_cmn.c index da46309a855c..2998969beacc 100644 --- a/drivers/net/bnx2x/bnx2x_cmn.c +++ b/drivers/net/bnx2x/bnx2x_cmn.c @@ -29,7 +29,6 @@ #include "bnx2x_init.h" -static int bnx2x_poll(struct napi_struct *napi, int budget); /* free skb in the packet ring at pos idx * return idx of last bd freed @@ -989,55 +988,49 @@ static void bnx2x_free_msix_irqs(struct bnx2x *bp) } } -void bnx2x_free_irq(struct bnx2x *bp, bool disable_only) +void bnx2x_free_irq(struct bnx2x *bp) { - if (bp->flags & USING_MSIX_FLAG) { - if (!disable_only) - bnx2x_free_msix_irqs(bp); - pci_disable_msix(bp->pdev); - bp->flags &= ~USING_MSIX_FLAG; - - } else if (bp->flags & USING_MSI_FLAG) { - if (!disable_only) - free_irq(bp->pdev->irq, bp->dev); - pci_disable_msi(bp->pdev); - bp->flags &= ~USING_MSI_FLAG; - - } else if (!disable_only) + if (bp->flags & USING_MSIX_FLAG) + bnx2x_free_msix_irqs(bp); + else if (bp->flags & USING_MSI_FLAG) + free_irq(bp->pdev->irq, bp->dev); + else free_irq(bp->pdev->irq, bp->dev); } -static int bnx2x_enable_msix(struct bnx2x *bp) +int bnx2x_enable_msix(struct bnx2x *bp) { - int i, rc, offset = 1; - int igu_vec = 0; + int msix_vec = 0, i, rc, req_cnt; - bp->msix_table[0].entry = igu_vec; - DP(NETIF_MSG_IFUP, "msix_table[0].entry = %d (slowpath)\n", igu_vec); + bp->msix_table[msix_vec].entry = msix_vec; + DP(NETIF_MSG_IFUP, "msix_table[0].entry = %d (slowpath)\n", + bp->msix_table[0].entry); + msix_vec++; #ifdef BCM_CNIC - igu_vec = BP_L_ID(bp) + offset; - bp->msix_table[1].entry = igu_vec; - DP(NETIF_MSG_IFUP, "msix_table[1].entry = %d (CNIC)\n", igu_vec); - offset++; + bp->msix_table[msix_vec].entry = msix_vec; + DP(NETIF_MSG_IFUP, "msix_table[%d].entry = %d (CNIC)\n", + bp->msix_table[msix_vec].entry, bp->msix_table[msix_vec].entry); + msix_vec++; #endif for_each_queue(bp, i) { - igu_vec = BP_L_ID(bp) + offset + i; - bp->msix_table[i + offset].entry = igu_vec; + bp->msix_table[msix_vec].entry = msix_vec; DP(NETIF_MSG_IFUP, "msix_table[%d].entry = %d " - "(fastpath #%u)\n", i + offset, igu_vec, i); + "(fastpath #%u)\n", msix_vec, msix_vec, i); + msix_vec++; } - rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], - BNX2X_NUM_QUEUES(bp) + offset); + req_cnt = BNX2X_NUM_QUEUES(bp) + CNIC_CONTEXT_USE + 1; + + rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], req_cnt); /* * reconfigure number of tx/rx queues according to available * MSI-X vectors */ if (rc >= BNX2X_MIN_MSIX_VEC_CNT) { - /* vectors available for FP */ - int fp_vec = rc - BNX2X_MSIX_VEC_FP_START; + /* how less vectors we will have? */ + int diff = req_cnt - rc; DP(NETIF_MSG_IFUP, "Trying to use less MSI-X vectors: %d\n", rc); @@ -1049,12 +1042,17 @@ static int bnx2x_enable_msix(struct bnx2x *bp) "MSI-X is not attainable rc %d\n", rc); return rc; } - - bp->num_queues = min(bp->num_queues, fp_vec); + /* + * decrease number of queues by number of unallocated entries + */ + bp->num_queues -= diff; DP(NETIF_MSG_IFUP, "New queue configuration set: %d\n", bp->num_queues); } else if (rc) { + /* fall to INTx if not enough memory */ + if (rc == -ENOMEM) + bp->flags |= DISABLE_MSI_FLAG; DP(NETIF_MSG_IFUP, "MSI-X is not attainable rc %d\n", rc); return rc; } @@ -1083,7 +1081,7 @@ static int bnx2x_req_msix_irqs(struct bnx2x *bp) snprintf(fp->name, sizeof(fp->name), "%s-fp-%d", bp->dev->name, i); - rc = request_irq(bp->msix_table[i + offset].vector, + rc = request_irq(bp->msix_table[offset].vector, bnx2x_msix_fp_int, 0, fp->name, fp); if (rc) { BNX2X_ERR("request fp #%d irq failed rc %d\n", i, rc); @@ -1091,10 +1089,12 @@ static int bnx2x_req_msix_irqs(struct bnx2x *bp) return -EBUSY; } + offset++; fp->state = BNX2X_FP_STATE_IRQ; } i = BNX2X_NUM_QUEUES(bp); + offset = 1 + CNIC_CONTEXT_USE; netdev_info(bp->dev, "using MSI-X IRQs: sp %d fp[%d] %d" " ... fp[%d] %d\n", bp->msix_table[0].vector, @@ -1104,7 +1104,7 @@ static int bnx2x_req_msix_irqs(struct bnx2x *bp) return 0; } -static int bnx2x_enable_msi(struct bnx2x *bp) +int bnx2x_enable_msi(struct bnx2x *bp) { int rc; @@ -1175,44 +1175,20 @@ void bnx2x_netif_stop(struct bnx2x *bp, int disable_hw) bnx2x_napi_disable(bp); netif_tx_disable(bp->dev); } -static int bnx2x_set_num_queues(struct bnx2x *bp) -{ - int rc = 0; - switch (bp->int_mode) { - case INT_MODE_MSI: - bnx2x_enable_msi(bp); - /* falling through... */ - case INT_MODE_INTx: +void bnx2x_set_num_queues(struct bnx2x *bp) +{ + switch (bp->multi_mode) { + case ETH_RSS_MODE_DISABLED: bp->num_queues = 1; - DP(NETIF_MSG_IFUP, "set number of queues to 1\n"); + break; + case ETH_RSS_MODE_REGULAR: + bp->num_queues = bnx2x_calc_num_queues(bp); break; default: - /* Set number of queues according to bp->multi_mode value */ - bnx2x_set_num_queues_msix(bp); - - DP(NETIF_MSG_IFUP, "set number of queues to %d\n", - bp->num_queues); - - /* if we can't use MSI-X we only need one fp, - * so try to enable MSI-X with the requested number of fp's - * and fallback to MSI or legacy INTx with one fp - */ - rc = bnx2x_enable_msix(bp); - if (rc) { - /* failed to enable MSI-X */ - bp->num_queues = 1; - - /* Fall to INTx if failed to enable MSI-X due to lack of - * memory (in bnx2x_set_num_queues()) */ - if ((rc != -ENOMEM) && (bp->int_mode != INT_MODE_INTx)) - bnx2x_enable_msi(bp); - } - + bp->num_queues = 1; break; } - netif_set_real_num_tx_queues(bp->dev, bp->num_queues); - return netif_set_real_num_rx_queues(bp->dev, bp->num_queues); } static void bnx2x_release_firmware(struct bnx2x *bp) @@ -1243,49 +1219,25 @@ int bnx2x_nic_load(struct bnx2x *bp, int load_mode) bp->state = BNX2X_STATE_OPENING_WAIT4_LOAD; - rc = bnx2x_set_num_queues(bp); - if (rc) - return rc; - /* must be called before memory allocation and HW init */ bnx2x_ilt_set_info(bp); - if (bnx2x_alloc_mem(bp)) { - bnx2x_free_irq(bp, true); + if (bnx2x_alloc_mem(bp)) return -ENOMEM; + + netif_set_real_num_tx_queues(bp->dev, bp->num_queues); + rc = netif_set_real_num_rx_queues(bp->dev, bp->num_queues); + if (rc) { + BNX2X_ERR("Unable to update real_num_rx_queues\n"); + goto load_error0; } for_each_queue(bp, i) bnx2x_fp(bp, i, disable_tpa) = ((bp->flags & TPA_ENABLE_FLAG) == 0); - for_each_queue(bp, i) - netif_napi_add(bp->dev, &bnx2x_fp(bp, i, napi), - bnx2x_poll, 128); - bnx2x_napi_enable(bp); - if (bp->flags & USING_MSIX_FLAG) { - rc = bnx2x_req_msix_irqs(bp); - if (rc) { - bnx2x_free_irq(bp, true); - goto load_error1; - } - } else { - bnx2x_ack_int(bp); - rc = bnx2x_req_irq(bp); - if (rc) { - BNX2X_ERR("IRQ request failed rc %d, aborting\n", rc); - bnx2x_free_irq(bp, true); - goto load_error1; - } - if (bp->flags & USING_MSI_FLAG) { - bp->dev->irq = bp->pdev->irq; - netdev_info(bp->dev, "using MSI IRQ %d\n", - bp->pdev->irq); - } - } - /* Send LOAD_REQUEST command to MCP Returns the type of LOAD command: if it is the first port to be initialized @@ -1296,11 +1248,11 @@ int bnx2x_nic_load(struct bnx2x *bp, int load_mode) if (!load_code) { BNX2X_ERR("MCP response failure, aborting\n"); rc = -EBUSY; - goto load_error2; + goto load_error1; } if (load_code == FW_MSG_CODE_DRV_LOAD_REFUSED) { rc = -EBUSY; /* other port in diagnostic mode */ - goto load_error2; + goto load_error1; } } else { @@ -1341,6 +1293,8 @@ int bnx2x_nic_load(struct bnx2x *bp, int load_mode) goto load_error2; } + /* Connect to IRQs */ + rc = bnx2x_setup_irqs(bp); if (rc) { bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0); goto load_error2; @@ -1481,22 +1435,24 @@ load_error4: #endif load_error3: bnx2x_int_disable_sync(bp, 1); - if (!BP_NOMCP(bp)) { - bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_REQ_WOL_MCP, 0); - bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_DONE, 0); - } - bp->port.pmf = 0; + /* Free SKBs, SGEs, TPA pool and driver internals */ bnx2x_free_skbs(bp); for_each_queue(bp, i) bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE); -load_error2: + /* Release IRQs */ - bnx2x_free_irq(bp, false); + bnx2x_free_irq(bp); +load_error2: + if (!BP_NOMCP(bp)) { + bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_REQ_WOL_MCP, 0); + bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_DONE, 0); + } + + bp->port.pmf = 0; load_error1: bnx2x_napi_disable(bp); - for_each_queue(bp, i) - netif_napi_del(&bnx2x_fp(bp, i, napi)); +load_error0: bnx2x_free_mem(bp); bnx2x_release_firmware(bp); @@ -1544,7 +1500,7 @@ int bnx2x_nic_unload(struct bnx2x *bp, int unload_mode) bnx2x_netif_stop(bp, 1); /* Release IRQs */ - bnx2x_free_irq(bp, false); + bnx2x_free_irq(bp); } bp->port.pmf = 0; @@ -1553,8 +1509,7 @@ int bnx2x_nic_unload(struct bnx2x *bp, int unload_mode) bnx2x_free_skbs(bp); for_each_queue(bp, i) bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE); - for_each_queue(bp, i) - netif_napi_del(&bnx2x_fp(bp, i, napi)); + bnx2x_free_mem(bp); bp->state = BNX2X_STATE_CLOSED; @@ -1624,7 +1579,7 @@ int bnx2x_set_power_state(struct bnx2x *bp, pci_power_t state) * net_device service functions */ -static int bnx2x_poll(struct napi_struct *napi, int budget) +int bnx2x_poll(struct napi_struct *napi, int budget) { int work_done = 0; struct bnx2x_fastpath *fp = container_of(napi, struct bnx2x_fastpath, @@ -2261,6 +2216,31 @@ int bnx2x_change_mac_addr(struct net_device *dev, void *p) return 0; } + +int bnx2x_setup_irqs(struct bnx2x *bp) +{ + int rc = 0; + if (bp->flags & USING_MSIX_FLAG) { + rc = bnx2x_req_msix_irqs(bp); + if (rc) + return rc; + } else { + bnx2x_ack_int(bp); + rc = bnx2x_req_irq(bp); + if (rc) { + BNX2X_ERR("IRQ request failed rc %d, aborting\n", rc); + return rc; + } + if (bp->flags & USING_MSI_FLAG) { + bp->dev->irq = bp->pdev->irq; + netdev_info(bp->dev, "using MSI IRQ %d\n", + bp->pdev->irq); + } + } + + return 0; +} + void bnx2x_free_mem_bp(struct bnx2x *bp) { kfree(bp->fp); diff --git a/drivers/net/bnx2x/bnx2x_cmn.h b/drivers/net/bnx2x/bnx2x_cmn.h index f08a42ad6b47..1d9686ea6b66 100644 --- a/drivers/net/bnx2x/bnx2x_cmn.h +++ b/drivers/net/bnx2x/bnx2x_cmn.h @@ -23,6 +23,7 @@ #include "bnx2x.h" +extern int num_queues; /*********************** Interfaces **************************** * Functions that need to be implemented by each driver version @@ -193,12 +194,12 @@ int bnx2x_stop_fw_client(struct bnx2x *bp, struct bnx2x_client_ramrod_params *p); /** - * Set number of quueus according to mode + * Set number of queues according to mode * * @param bp * */ -void bnx2x_set_num_queues_msix(struct bnx2x *bp); +void bnx2x_set_num_queues(struct bnx2x *bp); /** * Cleanup chip internals: @@ -325,6 +326,42 @@ int bnx2x_func_stop(struct bnx2x *bp); */ void bnx2x_ilt_set_info(struct bnx2x *bp); +/** + * Fill msix_table, request vectors, update num_queues according + * to number of available vectors + * + * @param bp + * + * @return int + */ +int bnx2x_enable_msix(struct bnx2x *bp); + +/** + * Request msi mode from OS, updated internals accordingly + * + * @param bp + * + * @return int + */ +int bnx2x_enable_msi(struct bnx2x *bp); + +/** + * Request IRQ vectors from OS. + * + * @param bp + * + * @return int + */ +int bnx2x_setup_irqs(struct bnx2x *bp); +/** + * NAPI callback + * + * @param napi + * @param budget + * + * @return int + */ +int bnx2x_poll(struct napi_struct *napi, int budget); static inline void bnx2x_update_fpsb_idx(struct bnx2x_fastpath *fp) { barrier(); /* status block is written to by the chip */ @@ -605,9 +642,41 @@ static inline void bnx2x_free_rx_sge(struct bnx2x *bp, sge->addr_lo = 0; } +static inline void bnx2x_add_all_napi(struct bnx2x *bp) +{ + int i; + /* Add NAPI objects */ + for_each_queue(bp, i) + netif_napi_add(bp->dev, &bnx2x_fp(bp, i, napi), + bnx2x_poll, BNX2X_NAPI_WEIGHT); +} +static inline void bnx2x_del_all_napi(struct bnx2x *bp) +{ + int i; + + for_each_queue(bp, i) + netif_napi_del(&bnx2x_fp(bp, i, napi)); +} +static inline void bnx2x_disable_msi(struct bnx2x *bp) +{ + if (bp->flags & USING_MSIX_FLAG) { + pci_disable_msix(bp->pdev); + bp->flags &= ~USING_MSIX_FLAG; + } else if (bp->flags & USING_MSI_FLAG) { + pci_disable_msi(bp->pdev); + bp->flags &= ~USING_MSI_FLAG; + } +} + +static inline int bnx2x_calc_num_queues(struct bnx2x *bp) +{ + return num_queues ? + min_t(int, num_queues, BNX2X_MAX_QUEUES(bp)) : + min_t(int, num_online_cpus(), BNX2X_MAX_QUEUES(bp)); +} static inline void bnx2x_clear_sge_mask_next_elems(struct bnx2x_fastpath *fp) { @@ -877,7 +946,7 @@ void bnx2x_tx_timeout(struct net_device *dev); void bnx2x_vlan_rx_register(struct net_device *dev, struct vlan_group *vlgrp); void bnx2x_netif_start(struct bnx2x *bp); void bnx2x_netif_stop(struct bnx2x *bp, int disable_hw); -void bnx2x_free_irq(struct bnx2x *bp, bool disable_only); +void bnx2x_free_irq(struct bnx2x *bp); int bnx2x_suspend(struct pci_dev *pdev, pm_message_t state); int bnx2x_resume(struct pci_dev *pdev); void bnx2x_free_skbs(struct bnx2x *bp); diff --git a/drivers/net/bnx2x/bnx2x_main.c b/drivers/net/bnx2x/bnx2x_main.c index 0ac416a14202..2572eb40c0ed 100644 --- a/drivers/net/bnx2x/bnx2x_main.c +++ b/drivers/net/bnx2x/bnx2x_main.c @@ -90,7 +90,7 @@ module_param(multi_mode, int, 0); MODULE_PARM_DESC(multi_mode, " Multi queue mode " "(0 Disable; 1 Enable (default))"); -static int num_queues; +int num_queues; module_param(num_queues, int, 0); MODULE_PARM_DESC(num_queues, " Number of queues for multi_mode=1" " (default is as a number of CPUs)"); @@ -6409,28 +6409,57 @@ int bnx2x_setup_fw_client(struct bnx2x *bp, return rc; } -void bnx2x_set_num_queues_msix(struct bnx2x *bp) +/** + * Configure interrupt mode according to current configuration. + * In case of MSI-X it will also try to enable MSI-X. + * + * @param bp + * + * @return int + */ +static int __devinit bnx2x_set_int_mode(struct bnx2x *bp) { + int rc = 0; - switch (bp->multi_mode) { - case ETH_RSS_MODE_DISABLED: + switch (bp->int_mode) { + case INT_MODE_MSI: + bnx2x_enable_msi(bp); + /* falling through... */ + case INT_MODE_INTx: bp->num_queues = 1; + DP(NETIF_MSG_IFUP, "set number of queues to 1\n"); break; + default: + /* Set number of queues according to bp->multi_mode value */ + bnx2x_set_num_queues(bp); - case ETH_RSS_MODE_REGULAR: - if (num_queues) - bp->num_queues = min_t(u32, num_queues, - BNX2X_MAX_QUEUES(bp)); - else - bp->num_queues = min_t(u32, num_online_cpus(), - BNX2X_MAX_QUEUES(bp)); - break; + DP(NETIF_MSG_IFUP, "set number of queues to %d\n", + bp->num_queues); + /* if we can't use MSI-X we only need one fp, + * so try to enable MSI-X with the requested number of fp's + * and fallback to MSI or legacy INTx with one fp + */ + rc = bnx2x_enable_msix(bp); + if (rc) { + /* failed to enable MSI-X */ + if (bp->multi_mode) + DP(NETIF_MSG_IFUP, + "Multi requested but failed to " + "enable MSI-X (%d), " + "set number of queues to %d\n", + bp->num_queues, + 1); + bp->num_queues = 1; + + if (!(bp->flags & DISABLE_MSI_FLAG)) + bnx2x_enable_msi(bp); + } - default: - bp->num_queues = 1; break; } + + return rc; } void bnx2x_ilt_set_info(struct bnx2x *bp) @@ -6881,7 +6910,7 @@ unload_error: bnx2x_netif_stop(bp, 1); /* Release IRQs */ - bnx2x_free_irq(bp, false); + bnx2x_free_irq(bp); /* Reset the chip */ bnx2x_reset_chip(bp, reset_code); @@ -9024,7 +9053,16 @@ static int __devinit bnx2x_init_one(struct pci_dev *pdev, goto init_one_exit; } + /* Configure interupt mode: try to enable MSI-X/MSI if + * needed, set bp->num_queues appropriately. + */ + bnx2x_set_int_mode(bp); + + /* Add all NAPI objects */ + bnx2x_add_all_napi(bp); + bnx2x_get_pcie_width_speed(bp, &pcie_width, &pcie_speed); + netdev_info(dev, "%s (%c%d) PCI-E x%d %s found at mem %lx," " IRQ %d, ", board_info[ent->driver_data].name, (CHIP_REV(bp) >> 12) + 'A', (CHIP_METAL(bp) >> 4), @@ -9068,6 +9106,11 @@ static void __devexit bnx2x_remove_one(struct pci_dev *pdev) unregister_netdev(dev); + /* Delete all NAPI objects */ + bnx2x_del_all_napi(bp); + + /* Disable MSI/MSI-X */ + bnx2x_disable_msi(bp); /* Make sure RESET task is not scheduled before continuing */ cancel_delayed_work_sync(&bp->reset_task); @@ -9104,15 +9147,14 @@ static int bnx2x_eeh_nic_unload(struct bnx2x *bp) DP(BNX2X_MSG_STATS, "stats_state - DISABLED\n"); /* Release IRQs */ - bnx2x_free_irq(bp, false); + bnx2x_free_irq(bp); /* Free SKBs, SGEs, TPA pool and driver internals */ bnx2x_free_skbs(bp); for_each_queue(bp, i) bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE); - for_each_queue(bp, i) - netif_napi_del(&bnx2x_fp(bp, i, napi)); + bnx2x_free_mem(bp); bp->state = BNX2X_STATE_CLOSED; -- 2.20.1