2 * Copyright (c) 2018, Mellanox Technologies. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
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11 * without modification, are permitted provided that the following
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15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
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21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #define BAD_ACCESS 0xBADACCE5
36 #define HEALTH_BUFFER_SIZE 0x40
37 #define CR_ENABLE_BIT swab32(BIT(6))
38 #define CR_ENABLE_BIT_OFFSET 0xF3F04
39 #define MAX_NUM_OF_DUMPS_TO_STORE (8)
41 #define REGION_CR_SPACE "cr-space"
42 #define REGION_FW_HEALTH "fw-health"
44 static const char * const region_cr_space_str = REGION_CR_SPACE;
45 static const char * const region_fw_health_str = REGION_FW_HEALTH;
47 static const struct devlink_region_ops region_cr_space_ops = {
48 .name = REGION_CR_SPACE,
49 .destructor = &kvfree,
52 static const struct devlink_region_ops region_fw_health_ops = {
53 .name = REGION_FW_HEALTH,
54 .destructor = &kvfree,
57 /* Set to true in case cr enable bit was set to true before crdump */
58 static bool crdump_enbale_bit_set;
60 static void crdump_enable_crspace_access(struct mlx4_dev *dev,
63 /* Get current enable bit value */
64 crdump_enbale_bit_set =
65 readl(cr_space + CR_ENABLE_BIT_OFFSET) & CR_ENABLE_BIT;
67 /* Enable FW CR filter (set bit6 to 0) */
68 if (crdump_enbale_bit_set)
69 writel(readl(cr_space + CR_ENABLE_BIT_OFFSET) & ~CR_ENABLE_BIT,
70 cr_space + CR_ENABLE_BIT_OFFSET);
72 /* Enable block volatile crspace accesses */
73 writel(swab32(1), cr_space + dev->caps.health_buffer_addrs +
77 static void crdump_disable_crspace_access(struct mlx4_dev *dev,
80 /* Disable block volatile crspace accesses */
81 writel(0, cr_space + dev->caps.health_buffer_addrs +
84 /* Restore FW CR filter value (set bit6 to original value) */
85 if (crdump_enbale_bit_set)
86 writel(readl(cr_space + CR_ENABLE_BIT_OFFSET) | CR_ENABLE_BIT,
87 cr_space + CR_ENABLE_BIT_OFFSET);
90 static void mlx4_crdump_collect_crspace(struct mlx4_dev *dev,
94 struct mlx4_fw_crdump *crdump = &dev->persist->crdump;
95 struct pci_dev *pdev = dev->persist->pdev;
96 unsigned long cr_res_size;
101 if (!crdump->region_crspace) {
102 mlx4_err(dev, "crdump: cr-space region is NULL\n");
106 /* Try to collect CR space */
107 cr_res_size = pci_resource_len(pdev, 0);
108 crspace_data = kvmalloc(cr_res_size, GFP_KERNEL);
110 for (offset = 0; offset < cr_res_size; offset += 4)
111 *(u32 *)(crspace_data + offset) =
112 readl(cr_space + offset);
114 err = devlink_region_snapshot_create(crdump->region_crspace,
117 kvfree(crspace_data);
118 mlx4_warn(dev, "crdump: devlink create %s snapshot id %d err %d\n",
119 region_cr_space_str, id, err);
121 mlx4_info(dev, "crdump: added snapshot %d to devlink region %s\n",
122 id, region_cr_space_str);
125 mlx4_err(dev, "crdump: Failed to allocate crspace buffer\n");
129 static void mlx4_crdump_collect_fw_health(struct mlx4_dev *dev,
130 u8 __iomem *cr_space,
133 struct mlx4_fw_crdump *crdump = &dev->persist->crdump;
138 if (!crdump->region_fw_health) {
139 mlx4_err(dev, "crdump: fw-health region is NULL\n");
143 /* Try to collect health buffer */
144 health_data = kvmalloc(HEALTH_BUFFER_SIZE, GFP_KERNEL);
146 u8 __iomem *health_buf_start =
147 cr_space + dev->caps.health_buffer_addrs;
149 for (offset = 0; offset < HEALTH_BUFFER_SIZE; offset += 4)
150 *(u32 *)(health_data + offset) =
151 readl(health_buf_start + offset);
153 err = devlink_region_snapshot_create(crdump->region_fw_health,
157 mlx4_warn(dev, "crdump: devlink create %s snapshot id %d err %d\n",
158 region_fw_health_str, id, err);
160 mlx4_info(dev, "crdump: added snapshot %d to devlink region %s\n",
161 id, region_fw_health_str);
164 mlx4_err(dev, "crdump: Failed to allocate health buffer\n");
168 int mlx4_crdump_collect(struct mlx4_dev *dev)
170 struct devlink *devlink = priv_to_devlink(mlx4_priv(dev));
171 struct mlx4_fw_crdump *crdump = &dev->persist->crdump;
172 struct pci_dev *pdev = dev->persist->pdev;
173 unsigned long cr_res_size;
174 u8 __iomem *cr_space;
178 if (!dev->caps.health_buffer_addrs) {
179 mlx4_info(dev, "crdump: FW doesn't support health buffer access, skipping\n");
183 if (!crdump->snapshot_enable) {
184 mlx4_info(dev, "crdump: devlink snapshot disabled, skipping\n");
188 cr_res_size = pci_resource_len(pdev, 0);
190 cr_space = ioremap(pci_resource_start(pdev, 0), cr_res_size);
192 mlx4_err(dev, "crdump: Failed to map pci cr region\n");
196 /* Get the available snapshot ID for the dumps */
197 err = devlink_region_snapshot_id_get(devlink, &id);
199 mlx4_err(dev, "crdump: devlink get snapshot id err %d\n", err);
204 crdump_enable_crspace_access(dev, cr_space);
206 /* Try to capture dumps */
207 mlx4_crdump_collect_crspace(dev, cr_space, id);
208 mlx4_crdump_collect_fw_health(dev, cr_space, id);
210 /* Release reference on the snapshot id */
211 devlink_region_snapshot_id_put(devlink, id);
213 crdump_disable_crspace_access(dev, cr_space);
219 int mlx4_crdump_init(struct mlx4_dev *dev)
221 struct devlink *devlink = priv_to_devlink(mlx4_priv(dev));
222 struct mlx4_fw_crdump *crdump = &dev->persist->crdump;
223 struct pci_dev *pdev = dev->persist->pdev;
225 crdump->snapshot_enable = false;
227 /* Create cr-space region */
228 crdump->region_crspace =
229 devl_region_create(devlink,
230 ®ion_cr_space_ops,
231 MAX_NUM_OF_DUMPS_TO_STORE,
232 pci_resource_len(pdev, 0));
233 if (IS_ERR(crdump->region_crspace))
234 mlx4_warn(dev, "crdump: create devlink region %s err %ld\n",
236 PTR_ERR(crdump->region_crspace));
238 /* Create fw-health region */
239 crdump->region_fw_health =
240 devl_region_create(devlink,
241 ®ion_fw_health_ops,
242 MAX_NUM_OF_DUMPS_TO_STORE,
244 if (IS_ERR(crdump->region_fw_health))
245 mlx4_warn(dev, "crdump: create devlink region %s err %ld\n",
246 region_fw_health_str,
247 PTR_ERR(crdump->region_fw_health));
252 void mlx4_crdump_end(struct mlx4_dev *dev)
254 struct mlx4_fw_crdump *crdump = &dev->persist->crdump;
256 devl_region_destroy(crdump->region_fw_health);
257 devl_region_destroy(crdump->region_crspace);