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Subject[PATCH][v4][13/24] Add Mellanox HCA low-level driver (initialization)
Add device initializaton code for Mellanox HCA driver.

Signed-off-by: Roland Dreier <roland@topspin.com>


--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-bk/drivers/infiniband/hw/mthca/mthca_profile.c 2004-12-19 22:04:15.759376780 -0800
@@ -0,0 +1,226 @@
+/*
+ * Copyright (c) 2004 Topspin Communications. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * $Id: mthca_profile.c 1349 2004-12-16 21:09:43Z roland $
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+
+#include "mthca_profile.h"
+
+static int default_profile[MTHCA_RES_NUM] = {
+ [MTHCA_RES_QP] = 1 << 16,
+ [MTHCA_RES_EQP] = 1 << 16,
+ [MTHCA_RES_CQ] = 1 << 16,
+ [MTHCA_RES_EQ] = 32,
+ [MTHCA_RES_RDB] = 1 << 18,
+ [MTHCA_RES_MCG] = 1 << 13,
+ [MTHCA_RES_MPT] = 1 << 17,
+ [MTHCA_RES_MTT] = 1 << 20,
+ [MTHCA_RES_UDAV] = 1 << 15
+};
+
+enum {
+ MTHCA_RDB_ENTRY_SIZE = 32,
+ MTHCA_MTT_SEG_SIZE = 64
+};
+
+enum {
+ MTHCA_NUM_PDS = 1 << 15
+};
+
+int mthca_make_profile(struct mthca_dev *dev,
+ struct mthca_dev_lim *dev_lim,
+ struct mthca_init_hca_param *init_hca)
+{
+ /* just use default profile for now */
+ struct mthca_resource {
+ u64 size;
+ u64 start;
+ int type;
+ int num;
+ int log_num;
+ };
+
+ u64 total_size = 0;
+ struct mthca_resource *profile;
+ struct mthca_resource tmp;
+ int i, j;
+
+ default_profile[MTHCA_RES_UAR] = dev_lim->uar_size / PAGE_SIZE;
+
+ profile = kmalloc(MTHCA_RES_NUM * sizeof *profile, GFP_KERNEL);
+ if (!profile)
+ return -ENOMEM;
+
+ profile[MTHCA_RES_QP].size = dev_lim->qpc_entry_sz;
+ profile[MTHCA_RES_EEC].size = dev_lim->eec_entry_sz;
+ profile[MTHCA_RES_SRQ].size = dev_lim->srq_entry_sz;
+ profile[MTHCA_RES_CQ].size = dev_lim->cqc_entry_sz;
+ profile[MTHCA_RES_EQP].size = dev_lim->eqpc_entry_sz;
+ profile[MTHCA_RES_EEEC].size = dev_lim->eeec_entry_sz;
+ profile[MTHCA_RES_EQ].size = dev_lim->eqc_entry_sz;
+ profile[MTHCA_RES_RDB].size = MTHCA_RDB_ENTRY_SIZE;
+ profile[MTHCA_RES_MCG].size = MTHCA_MGM_ENTRY_SIZE;
+ profile[MTHCA_RES_MPT].size = MTHCA_MPT_ENTRY_SIZE;
+ profile[MTHCA_RES_MTT].size = MTHCA_MTT_SEG_SIZE;
+ profile[MTHCA_RES_UAR].size = dev_lim->uar_scratch_entry_sz;
+ profile[MTHCA_RES_UDAV].size = MTHCA_AV_SIZE;
+
+ for (i = 0; i < MTHCA_RES_NUM; ++i) {
+ profile[i].type = i;
+ profile[i].num = default_profile[i];
+ profile[i].log_num = max(ffs(default_profile[i]) - 1, 0);
+ profile[i].size *= default_profile[i];
+ }
+
+ /*
+ * Sort the resources in decreasing order of size. Since they
+ * all have sizes that are powers of 2, we'll be able to keep
+ * resources aligned to their size and pack them without gaps
+ * using the sorted order.
+ */
+ for (i = MTHCA_RES_NUM; i > 0; --i)
+ for (j = 1; j < i; ++j) {
+ if (profile[j].size > profile[j - 1].size) {
+ tmp = profile[j];
+ profile[j] = profile[j - 1];
+ profile[j - 1] = tmp;
+ }
+ }
+
+ for (i = 0; i < MTHCA_RES_NUM; ++i) {
+ if (profile[i].size) {
+ profile[i].start = dev->ddr_start + total_size;
+ total_size += profile[i].size;
+ }
+ if (total_size > dev->fw.tavor.fw_start - dev->ddr_start) {
+ mthca_err(dev, "Profile requires 0x%llx bytes; "
+ "won't fit between DDR start at 0x%016llx "
+ "and FW start at 0x%016llx.\n",
+ (unsigned long long) total_size,
+ (unsigned long long) dev->ddr_start,
+ (unsigned long long) dev->fw.tavor.fw_start);
+ kfree(profile);
+ return -ENOMEM;
+ }
+
+ if (profile[i].size)
+ mthca_dbg(dev, "profile[%2d]--%2d/%2d @ 0x%16llx "
+ "(size 0x%8llx)\n",
+ i, profile[i].type, profile[i].log_num,
+ (unsigned long long) profile[i].start,
+ (unsigned long long) profile[i].size);
+ }
+
+ mthca_dbg(dev, "HCA memory: allocated %d KB/%d KB (%d KB free)\n",
+ (int) (total_size >> 10),
+ (int) ((dev->fw.tavor.fw_start - dev->ddr_start) >> 10),
+ (int) ((dev->fw.tavor.fw_start - dev->ddr_start - total_size) >> 10));
+
+ for (i = 0; i < MTHCA_RES_NUM; ++i) {
+ switch (profile[i].type) {
+ case MTHCA_RES_QP:
+ dev->limits.num_qps = profile[i].num;
+ init_hca->qpc_base = profile[i].start;
+ init_hca->log_num_qps = profile[i].log_num;
+ break;
+ case MTHCA_RES_EEC:
+ dev->limits.num_eecs = profile[i].num;
+ init_hca->eec_base = profile[i].start;
+ init_hca->log_num_eecs = profile[i].log_num;
+ break;
+ case MTHCA_RES_SRQ:
+ dev->limits.num_srqs = profile[i].num;
+ init_hca->srqc_base = profile[i].start;
+ init_hca->log_num_srqs = profile[i].log_num;
+ break;
+ case MTHCA_RES_CQ:
+ dev->limits.num_cqs = profile[i].num;
+ init_hca->cqc_base = profile[i].start;
+ init_hca->log_num_cqs = profile[i].log_num;
+ break;
+ case MTHCA_RES_EQP:
+ init_hca->eqpc_base = profile[i].start;
+ break;
+ case MTHCA_RES_EEEC:
+ init_hca->eeec_base = profile[i].start;
+ break;
+ case MTHCA_RES_EQ:
+ dev->limits.num_eqs = profile[i].num;
+ init_hca->eqc_base = profile[i].start;
+ init_hca->log_num_eqs = profile[i].log_num;
+ break;
+ case MTHCA_RES_RDB:
+ dev->limits.num_rdbs = profile[i].num;
+ init_hca->rdb_base = profile[i].start;
+ break;
+ case MTHCA_RES_MCG:
+ dev->limits.num_mgms = profile[i].num >> 1;
+ dev->limits.num_amgms = profile[i].num >> 1;
+ init_hca->mc_base = profile[i].start;
+ init_hca->log_mc_entry_sz = ffs(MTHCA_MGM_ENTRY_SIZE) - 1;
+ init_hca->log_mc_table_sz = profile[i].log_num;
+ init_hca->mc_hash_sz = 1 << (profile[i].log_num - 1);
+ break;
+ case MTHCA_RES_MPT:
+ dev->limits.num_mpts = profile[i].num;
+ init_hca->mpt_base = profile[i].start;
+ init_hca->log_mpt_sz = profile[i].log_num;
+ break;
+ case MTHCA_RES_MTT:
+ dev->limits.num_mtt_segs = profile[i].num;
+ dev->limits.mtt_seg_size = MTHCA_MTT_SEG_SIZE;
+ dev->mr_table.mtt_base = profile[i].start;
+ init_hca->mtt_base = profile[i].start;
+ init_hca->mtt_seg_sz = ffs(MTHCA_MTT_SEG_SIZE) - 7;
+ break;
+ case MTHCA_RES_UAR:
+ init_hca->uar_scratch_base = profile[i].start;
+ break;
+ case MTHCA_RES_UDAV:
+ dev->av_table.ddr_av_base = profile[i].start;
+ dev->av_table.num_ddr_avs = profile[i].num;
+ default:
+ break;
+ }
+ }
+
+ /*
+ * PDs don't take any HCA memory, but we assign them as part
+ * of the HCA profile anyway.
+ */
+ dev->limits.num_pds = MTHCA_NUM_PDS;
+
+ kfree(profile);
+ return 0;
+}
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-bk/drivers/infiniband/hw/mthca/mthca_profile.h 2004-12-19 22:04:15.783373244 -0800
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2004 Topspin Communications. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * $Id: mthca_profile.h 1349 2004-12-16 21:09:43Z roland $
+ */
+
+#ifndef MTHCA_PROFILE_H
+#define MTHCA_PROFILE_H
+
+#include "mthca_dev.h"
+#include "mthca_cmd.h"
+
+enum {
+ MTHCA_RES_QP,
+ MTHCA_RES_EEC,
+ MTHCA_RES_SRQ,
+ MTHCA_RES_CQ,
+ MTHCA_RES_EQP,
+ MTHCA_RES_EEEC,
+ MTHCA_RES_EQ,
+ MTHCA_RES_RDB,
+ MTHCA_RES_MCG,
+ MTHCA_RES_MPT,
+ MTHCA_RES_MTT,
+ MTHCA_RES_UAR,
+ MTHCA_RES_UDAV,
+ MTHCA_RES_NUM
+};
+
+int mthca_make_profile(struct mthca_dev *mdev,
+ struct mthca_dev_lim *dev_lim,
+ struct mthca_init_hca_param *init_hca);
+
+#endif /* MTHCA_PROFILE_H */
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-bk/drivers/infiniband/hw/mthca/mthca_reset.c 2004-12-19 22:04:15.807369708 -0800
@@ -0,0 +1,232 @@
+/*
+ * Copyright (c) 2004 Topspin Communications. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * $Id: mthca_reset.c 1349 2004-12-16 21:09:43Z roland $
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+
+#include "mthca_dev.h"
+#include "mthca_cmd.h"
+
+int mthca_reset(struct mthca_dev *mdev)
+{
+ int i;
+ int err = 0;
+ u32 *hca_header = NULL;
+ u32 *bridge_header = NULL;
+ struct pci_dev *bridge = NULL;
+
+#define MTHCA_RESET_OFFSET 0xf0010
+#define MTHCA_RESET_VALUE cpu_to_be32(1)
+
+ /*
+ * Reset the chip. This is somewhat ugly because we have to
+ * save off the PCI header before reset and then restore it
+ * after the chip reboots. We skip config space offsets 22
+ * and 23 since those have a special meaning.
+ *
+ * To make matters worse, for Tavor (PCI-X HCA) we have to
+ * find the associated bridge device and save off its PCI
+ * header as well.
+ */
+
+ if (mdev->hca_type == TAVOR) {
+ /* Look for the bridge -- its device ID will be 2 more
+ than HCA's device ID. */
+ while ((bridge = pci_get_device(mdev->pdev->vendor,
+ mdev->pdev->device + 2,
+ bridge)) != NULL) {
+ if (bridge->hdr_type == PCI_HEADER_TYPE_BRIDGE &&
+ bridge->subordinate == mdev->pdev->bus) {
+ mthca_dbg(mdev, "Found bridge: %s (%s)\n",
+ pci_pretty_name(bridge), pci_name(bridge));
+ break;
+ }
+ }
+
+ if (!bridge) {
+ /*
+ * Didn't find a bridge for a Tavor device --
+ * assume we're in no-bridge mode and hope for
+ * the best.
+ */
+ mthca_warn(mdev, "No bridge found for %s (%s)\n",
+ pci_pretty_name(mdev->pdev), pci_name(mdev->pdev));
+ }
+
+ }
+
+ /* For Arbel do we need to save off the full 4K PCI Express header?? */
+ hca_header = kmalloc(256, GFP_KERNEL);
+ if (!hca_header) {
+ err = -ENOMEM;
+ mthca_err(mdev, "Couldn't allocate memory to save HCA "
+ "PCI header, aborting.\n");
+ goto out;
+ }
+
+ for (i = 0; i < 64; ++i) {
+ if (i == 22 || i == 23)
+ continue;
+ if (pci_read_config_dword(mdev->pdev, i * 4, hca_header + i)) {
+ err = -ENODEV;
+ mthca_err(mdev, "Couldn't save HCA "
+ "PCI header, aborting.\n");
+ goto out;
+ }
+ }
+
+ if (bridge) {
+ bridge_header = kmalloc(256, GFP_KERNEL);
+ if (!bridge_header) {
+ err = -ENOMEM;
+ mthca_err(mdev, "Couldn't allocate memory to save HCA "
+ "bridge PCI header, aborting.\n");
+ goto out;
+ }
+
+ for (i = 0; i < 64; ++i) {
+ if (i == 22 || i == 23)
+ continue;
+ if (pci_read_config_dword(bridge, i * 4, bridge_header + i)) {
+ err = -ENODEV;
+ mthca_err(mdev, "Couldn't save HCA bridge "
+ "PCI header, aborting.\n");
+ goto out;
+ }
+ }
+ }
+
+ /* actually hit reset */
+ {
+ void __iomem *reset = ioremap(pci_resource_start(mdev->pdev, 0) +
+ MTHCA_RESET_OFFSET, 4);
+
+ if (!reset) {
+ err = -ENOMEM;
+ mthca_err(mdev, "Couldn't map HCA reset register, "
+ "aborting.\n");
+ goto out;
+ }
+
+ writel(MTHCA_RESET_VALUE, reset);
+ iounmap(reset);
+ }
+
+ /* Docs say to wait one second before accessing device */
+ msleep(1000);
+
+ /* Now wait for PCI device to start responding again */
+ {
+ u32 v;
+ int c = 0;
+
+ for (c = 0; c < 100; ++c) {
+ if (pci_read_config_dword(bridge ? bridge : mdev->pdev, 0, &v)) {
+ err = -ENODEV;
+ mthca_err(mdev, "Couldn't access HCA after reset, "
+ "aborting.\n");
+ goto out;
+ }
+
+ if (v != 0xffffffff)
+ goto good;
+
+ msleep(100);
+ }
+
+ err = -ENODEV;
+ mthca_err(mdev, "PCI device did not come back after reset, "
+ "aborting.\n");
+ goto out;
+ }
+
+good:
+ /* Now restore the PCI headers */
+ if (bridge) {
+ /*
+ * Bridge control register is at 0x3e, so we'll
+ * naturally restore it last in this loop.
+ */
+ for (i = 0; i < 16; ++i) {
+ if (i * 4 == PCI_COMMAND)
+ continue;
+
+ if (pci_write_config_dword(bridge, i * 4, bridge_header[i])) {
+ err = -ENODEV;
+ mthca_err(mdev, "Couldn't restore HCA bridge reg %x, "
+ "aborting.\n", i);
+ goto out;
+ }
+ }
+
+ if (pci_write_config_dword(bridge, PCI_COMMAND,
+ bridge_header[PCI_COMMAND / 4])) {
+ err = -ENODEV;
+ mthca_err(mdev, "Couldn't restore HCA bridge COMMAND, "
+ "aborting.\n");
+ goto out;
+ }
+ }
+
+ for (i = 0; i < 16; ++i) {
+ if (i * 4 == PCI_COMMAND)
+ continue;
+
+ if (pci_write_config_dword(mdev->pdev, i * 4, hca_header[i])) {
+ err = -ENODEV;
+ mthca_err(mdev, "Couldn't restore HCA reg %x, "
+ "aborting.\n", i);
+ goto out;
+ }
+ }
+
+ if (pci_write_config_dword(mdev->pdev, PCI_COMMAND,
+ hca_header[PCI_COMMAND / 4])) {
+ err = -ENODEV;
+ mthca_err(mdev, "Couldn't restore HCA COMMAND, "
+ "aborting.\n");
+ goto out;
+ }
+
+out:
+ if (bridge)
+ pci_dev_put(bridge);
+ kfree(bridge_header);
+ kfree(hca_header);
+
+ return err;
+}
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