Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) |
| 2 | /* |
| 3 | * Copyright 2014-2016 Freescale Semiconductor Inc. |
| 4 | * Copyright NXP 2016 |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <linux/types.h> |
| 9 | #include <linux/init.h> |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/platform_device.h> |
| 12 | #include <linux/interrupt.h> |
| 13 | #include <linux/msi.h> |
| 14 | #include <linux/dma-mapping.h> |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/io.h> |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 17 | #include <linux/sys_soc.h> |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 18 | |
| 19 | #include <linux/fsl/mc.h> |
| 20 | #include <soc/fsl/dpaa2-io.h> |
| 21 | |
| 22 | #include "qbman-portal.h" |
| 23 | #include "dpio.h" |
| 24 | #include "dpio-cmd.h" |
| 25 | |
| 26 | MODULE_LICENSE("Dual BSD/GPL"); |
| 27 | MODULE_AUTHOR("Freescale Semiconductor, Inc"); |
| 28 | MODULE_DESCRIPTION("DPIO Driver"); |
| 29 | |
| 30 | struct dpio_priv { |
| 31 | struct dpaa2_io *io; |
| 32 | }; |
| 33 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 34 | static cpumask_var_t cpus_unused_mask; |
| 35 | |
| 36 | static const struct soc_device_attribute ls1088a_soc[] = { |
| 37 | {.family = "QorIQ LS1088A"}, |
| 38 | { /* sentinel */ } |
| 39 | }; |
| 40 | |
| 41 | static const struct soc_device_attribute ls2080a_soc[] = { |
| 42 | {.family = "QorIQ LS2080A"}, |
| 43 | { /* sentinel */ } |
| 44 | }; |
| 45 | |
| 46 | static const struct soc_device_attribute ls2088a_soc[] = { |
| 47 | {.family = "QorIQ LS2088A"}, |
| 48 | { /* sentinel */ } |
| 49 | }; |
| 50 | |
| 51 | static const struct soc_device_attribute lx2160a_soc[] = { |
| 52 | {.family = "QorIQ LX2160A"}, |
| 53 | { /* sentinel */ } |
| 54 | }; |
| 55 | |
| 56 | static int dpaa2_dpio_get_cluster_sdest(struct fsl_mc_device *dpio_dev, int cpu) |
| 57 | { |
| 58 | int cluster_base, cluster_size; |
| 59 | |
| 60 | if (soc_device_match(ls1088a_soc)) { |
| 61 | cluster_base = 2; |
| 62 | cluster_size = 4; |
| 63 | } else if (soc_device_match(ls2080a_soc) || |
| 64 | soc_device_match(ls2088a_soc) || |
| 65 | soc_device_match(lx2160a_soc)) { |
| 66 | cluster_base = 0; |
| 67 | cluster_size = 2; |
| 68 | } else { |
| 69 | dev_err(&dpio_dev->dev, "unknown SoC version\n"); |
| 70 | return -1; |
| 71 | } |
| 72 | |
| 73 | return cluster_base + cpu / cluster_size; |
| 74 | } |
| 75 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 76 | static irqreturn_t dpio_irq_handler(int irq_num, void *arg) |
| 77 | { |
| 78 | struct device *dev = (struct device *)arg; |
| 79 | struct dpio_priv *priv = dev_get_drvdata(dev); |
| 80 | |
| 81 | return dpaa2_io_irq(priv->io); |
| 82 | } |
| 83 | |
| 84 | static void unregister_dpio_irq_handlers(struct fsl_mc_device *dpio_dev) |
| 85 | { |
| 86 | struct fsl_mc_device_irq *irq; |
| 87 | |
| 88 | irq = dpio_dev->irqs[0]; |
| 89 | |
| 90 | /* clear the affinity hint */ |
| 91 | irq_set_affinity_hint(irq->msi_desc->irq, NULL); |
| 92 | } |
| 93 | |
| 94 | static int register_dpio_irq_handlers(struct fsl_mc_device *dpio_dev, int cpu) |
| 95 | { |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 96 | int error; |
| 97 | struct fsl_mc_device_irq *irq; |
| 98 | cpumask_t mask; |
| 99 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 100 | irq = dpio_dev->irqs[0]; |
| 101 | error = devm_request_irq(&dpio_dev->dev, |
| 102 | irq->msi_desc->irq, |
| 103 | dpio_irq_handler, |
| 104 | 0, |
| 105 | dev_name(&dpio_dev->dev), |
| 106 | &dpio_dev->dev); |
| 107 | if (error < 0) { |
| 108 | dev_err(&dpio_dev->dev, |
| 109 | "devm_request_irq() failed: %d\n", |
| 110 | error); |
| 111 | return error; |
| 112 | } |
| 113 | |
| 114 | /* set the affinity hint */ |
| 115 | cpumask_clear(&mask); |
| 116 | cpumask_set_cpu(cpu, &mask); |
| 117 | if (irq_set_affinity_hint(irq->msi_desc->irq, &mask)) |
| 118 | dev_err(&dpio_dev->dev, |
| 119 | "irq_set_affinity failed irq %d cpu %d\n", |
| 120 | irq->msi_desc->irq, cpu); |
| 121 | |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | static int dpaa2_dpio_probe(struct fsl_mc_device *dpio_dev) |
| 126 | { |
| 127 | struct dpio_attr dpio_attrs; |
| 128 | struct dpaa2_io_desc desc; |
| 129 | struct dpio_priv *priv; |
| 130 | int err = -ENOMEM; |
| 131 | struct device *dev = &dpio_dev->dev; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 132 | int possible_next_cpu; |
| 133 | int sdest; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 134 | |
| 135 | priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
| 136 | if (!priv) |
| 137 | goto err_priv_alloc; |
| 138 | |
| 139 | dev_set_drvdata(dev, priv); |
| 140 | |
| 141 | err = fsl_mc_portal_allocate(dpio_dev, 0, &dpio_dev->mc_io); |
| 142 | if (err) { |
| 143 | dev_dbg(dev, "MC portal allocation failed\n"); |
| 144 | err = -EPROBE_DEFER; |
| 145 | goto err_priv_alloc; |
| 146 | } |
| 147 | |
| 148 | err = dpio_open(dpio_dev->mc_io, 0, dpio_dev->obj_desc.id, |
| 149 | &dpio_dev->mc_handle); |
| 150 | if (err) { |
| 151 | dev_err(dev, "dpio_open() failed\n"); |
| 152 | goto err_open; |
| 153 | } |
| 154 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 155 | err = dpio_reset(dpio_dev->mc_io, 0, dpio_dev->mc_handle); |
| 156 | if (err) { |
| 157 | dev_err(dev, "dpio_reset() failed\n"); |
| 158 | goto err_reset; |
| 159 | } |
| 160 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 161 | err = dpio_get_attributes(dpio_dev->mc_io, 0, dpio_dev->mc_handle, |
| 162 | &dpio_attrs); |
| 163 | if (err) { |
| 164 | dev_err(dev, "dpio_get_attributes() failed %d\n", err); |
| 165 | goto err_get_attr; |
| 166 | } |
| 167 | desc.qman_version = dpio_attrs.qbman_version; |
| 168 | |
| 169 | err = dpio_enable(dpio_dev->mc_io, 0, dpio_dev->mc_handle); |
| 170 | if (err) { |
| 171 | dev_err(dev, "dpio_enable() failed %d\n", err); |
| 172 | goto err_get_attr; |
| 173 | } |
| 174 | |
| 175 | /* initialize DPIO descriptor */ |
| 176 | desc.receives_notifications = dpio_attrs.num_priorities ? 1 : 0; |
| 177 | desc.has_8prio = dpio_attrs.num_priorities == 8 ? 1 : 0; |
| 178 | desc.dpio_id = dpio_dev->obj_desc.id; |
| 179 | |
| 180 | /* get the cpu to use for the affinity hint */ |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 181 | possible_next_cpu = cpumask_first(cpus_unused_mask); |
| 182 | if (possible_next_cpu >= nr_cpu_ids) { |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 183 | dev_err(dev, "probe failed. Number of DPIOs exceeds NR_CPUS.\n"); |
| 184 | err = -ERANGE; |
| 185 | goto err_allocate_irqs; |
| 186 | } |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 187 | desc.cpu = possible_next_cpu; |
| 188 | cpumask_clear_cpu(possible_next_cpu, cpus_unused_mask); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 189 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 190 | sdest = dpaa2_dpio_get_cluster_sdest(dpio_dev, desc.cpu); |
| 191 | if (sdest >= 0) { |
| 192 | err = dpio_set_stashing_destination(dpio_dev->mc_io, 0, |
| 193 | dpio_dev->mc_handle, |
| 194 | sdest); |
| 195 | if (err) |
| 196 | dev_err(dev, "dpio_set_stashing_destination failed for cpu%d\n", |
| 197 | desc.cpu); |
| 198 | } |
| 199 | |
| 200 | if (dpio_dev->obj_desc.region_count < 3) { |
| 201 | /* No support for DDR backed portals, use classic mapping */ |
| 202 | /* |
| 203 | * Set the CENA regs to be the cache inhibited area of the |
| 204 | * portal to avoid coherency issues if a user migrates to |
| 205 | * another core. |
| 206 | */ |
| 207 | desc.regs_cena = devm_memremap(dev, dpio_dev->regions[1].start, |
| 208 | resource_size(&dpio_dev->regions[1]), |
| 209 | MEMREMAP_WC); |
| 210 | } else { |
| 211 | desc.regs_cena = devm_memremap(dev, dpio_dev->regions[2].start, |
| 212 | resource_size(&dpio_dev->regions[2]), |
| 213 | MEMREMAP_WB); |
| 214 | } |
| 215 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 216 | if (IS_ERR(desc.regs_cena)) { |
| 217 | dev_err(dev, "devm_memremap failed\n"); |
| 218 | err = PTR_ERR(desc.regs_cena); |
| 219 | goto err_allocate_irqs; |
| 220 | } |
| 221 | |
| 222 | desc.regs_cinh = devm_ioremap(dev, dpio_dev->regions[1].start, |
| 223 | resource_size(&dpio_dev->regions[1])); |
| 224 | if (!desc.regs_cinh) { |
| 225 | err = -ENOMEM; |
| 226 | dev_err(dev, "devm_ioremap failed\n"); |
| 227 | goto err_allocate_irqs; |
| 228 | } |
| 229 | |
| 230 | err = fsl_mc_allocate_irqs(dpio_dev); |
| 231 | if (err) { |
| 232 | dev_err(dev, "fsl_mc_allocate_irqs failed. err=%d\n", err); |
| 233 | goto err_allocate_irqs; |
| 234 | } |
| 235 | |
| 236 | err = register_dpio_irq_handlers(dpio_dev, desc.cpu); |
| 237 | if (err) |
| 238 | goto err_register_dpio_irq; |
| 239 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 240 | priv->io = dpaa2_io_create(&desc, dev); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 241 | if (!priv->io) { |
| 242 | dev_err(dev, "dpaa2_io_create failed\n"); |
| 243 | err = -ENOMEM; |
| 244 | goto err_dpaa2_io_create; |
| 245 | } |
| 246 | |
| 247 | dev_info(dev, "probed\n"); |
| 248 | dev_dbg(dev, " receives_notifications = %d\n", |
| 249 | desc.receives_notifications); |
| 250 | dpio_close(dpio_dev->mc_io, 0, dpio_dev->mc_handle); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 251 | |
| 252 | return 0; |
| 253 | |
| 254 | err_dpaa2_io_create: |
| 255 | unregister_dpio_irq_handlers(dpio_dev); |
| 256 | err_register_dpio_irq: |
| 257 | fsl_mc_free_irqs(dpio_dev); |
| 258 | err_allocate_irqs: |
| 259 | dpio_disable(dpio_dev->mc_io, 0, dpio_dev->mc_handle); |
| 260 | err_get_attr: |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 261 | err_reset: |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 262 | dpio_close(dpio_dev->mc_io, 0, dpio_dev->mc_handle); |
| 263 | err_open: |
| 264 | fsl_mc_portal_free(dpio_dev->mc_io); |
| 265 | err_priv_alloc: |
| 266 | return err; |
| 267 | } |
| 268 | |
| 269 | /* Tear down interrupts for a given DPIO object */ |
| 270 | static void dpio_teardown_irqs(struct fsl_mc_device *dpio_dev) |
| 271 | { |
| 272 | unregister_dpio_irq_handlers(dpio_dev); |
| 273 | fsl_mc_free_irqs(dpio_dev); |
| 274 | } |
| 275 | |
| 276 | static int dpaa2_dpio_remove(struct fsl_mc_device *dpio_dev) |
| 277 | { |
| 278 | struct device *dev; |
| 279 | struct dpio_priv *priv; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 280 | int err = 0, cpu; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 281 | |
| 282 | dev = &dpio_dev->dev; |
| 283 | priv = dev_get_drvdata(dev); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 284 | cpu = dpaa2_io_get_cpu(priv->io); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 285 | |
| 286 | dpaa2_io_down(priv->io); |
| 287 | |
| 288 | dpio_teardown_irqs(dpio_dev); |
| 289 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 290 | cpumask_set_cpu(cpu, cpus_unused_mask); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 291 | |
| 292 | err = dpio_open(dpio_dev->mc_io, 0, dpio_dev->obj_desc.id, |
| 293 | &dpio_dev->mc_handle); |
| 294 | if (err) { |
| 295 | dev_err(dev, "dpio_open() failed\n"); |
| 296 | goto err_open; |
| 297 | } |
| 298 | |
| 299 | dpio_disable(dpio_dev->mc_io, 0, dpio_dev->mc_handle); |
| 300 | |
| 301 | dpio_close(dpio_dev->mc_io, 0, dpio_dev->mc_handle); |
| 302 | |
| 303 | fsl_mc_portal_free(dpio_dev->mc_io); |
| 304 | |
| 305 | return 0; |
| 306 | |
| 307 | err_open: |
| 308 | fsl_mc_portal_free(dpio_dev->mc_io); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 309 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 310 | return err; |
| 311 | } |
| 312 | |
| 313 | static const struct fsl_mc_device_id dpaa2_dpio_match_id_table[] = { |
| 314 | { |
| 315 | .vendor = FSL_MC_VENDOR_FREESCALE, |
| 316 | .obj_type = "dpio", |
| 317 | }, |
| 318 | { .vendor = 0x0 } |
| 319 | }; |
| 320 | |
| 321 | static struct fsl_mc_driver dpaa2_dpio_driver = { |
| 322 | .driver = { |
| 323 | .name = KBUILD_MODNAME, |
| 324 | .owner = THIS_MODULE, |
| 325 | }, |
| 326 | .probe = dpaa2_dpio_probe, |
| 327 | .remove = dpaa2_dpio_remove, |
| 328 | .match_id_table = dpaa2_dpio_match_id_table |
| 329 | }; |
| 330 | |
| 331 | static int dpio_driver_init(void) |
| 332 | { |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 333 | if (!zalloc_cpumask_var(&cpus_unused_mask, GFP_KERNEL)) |
| 334 | return -ENOMEM; |
| 335 | cpumask_copy(cpus_unused_mask, cpu_online_mask); |
| 336 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 337 | return fsl_mc_driver_register(&dpaa2_dpio_driver); |
| 338 | } |
| 339 | |
| 340 | static void dpio_driver_exit(void) |
| 341 | { |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 342 | free_cpumask_var(cpus_unused_mask); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 343 | fsl_mc_driver_unregister(&dpaa2_dpio_driver); |
| 344 | } |
| 345 | module_init(dpio_driver_init); |
| 346 | module_exit(dpio_driver_exit); |