// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include MODULE_IMPORT_NS(DMA_BUF); #include "include/kernel/ubwcp.h" #include "ubwcp_hw.h" #include "include/uapi/ubwcp_ioctl.h" #define CREATE_TRACE_POINTS #include "ubwcp_trace.h" #define UBWCP_NUM_DEVICES 1 #define UBWCP_DEVICE_NAME "ubwcp" #define UBWCP_BUFFER_DESC_OFFSET 64 #define UBWCP_BUFFER_DESC_COUNT 256 #define CACHE_ADDR(x) ((x) >> 6) #define PAGE_ADDR(x) ((x) >> 12) #define UBWCP_ALIGN(_x, _y) ((((_x) + (_y) - 1)/(_y))*(_y)) //#define DBG(fmt, args...) //#define DBG_BUF_ATTR(fmt, args...) #define DBG_BUF_ATTR(fmt, args...) do { if (ubwcp_debug_trace_enable) \ pr_err("ubwcp: %s(): " fmt "\n", __func__, ##args); \ } while (0) #define DBG(fmt, args...) do { if (ubwcp_debug_trace_enable) \ pr_err("ubwcp: %s(): " fmt "\n", __func__, ##args); \ } while (0) #define ERR(fmt, args...) pr_err("ubwcp: %s(): ~~~ERROR~~~: " fmt "\n", __func__, ##args) #define FENTRY() DBG("") #define META_DATA_PITCH_ALIGN 64 #define META_DATA_HEIGHT_ALIGN 16 #define META_DATA_SIZE_ALIGN 4096 #define PIXEL_DATA_SIZE_ALIGN 4096 #define UBWCP_SYNC_GRANULE 0x4000000L /* 64 MB */ struct ubwcp_desc { int idx; void *ptr; }; /* TBD: confirm size of width/height */ struct ubwcp_dimension { u16 width; u16 height; }; struct ubwcp_plane_info { u16 pixel_bytes; u16 per_pixel; struct ubwcp_dimension tilesize_p; /* pixels */ struct ubwcp_dimension macrotilesize_p; /* pixels */ }; struct ubwcp_image_format_info { u16 planes; struct ubwcp_plane_info p_info[2]; }; enum ubwcp_std_image_format { RGBA = 0, NV12 = 1, NV124R = 2, P010 = 3, TP10 = 4, P016 = 5, INFO_FORMAT_LIST_SIZE, STD_IMAGE_FORMAT_INVALID = 0xFF }; struct ubwcp_driver { /* cdev related */ dev_t devt; struct class *dev_class; //sysfs dev class struct device *dev_sys; //sysfs dev struct cdev cdev; //char dev /* debugfs */ struct dentry *debugfs_root; /* ubwcp devices */ struct device *dev; //ubwcp device struct device *dev_desc_cb; //smmu dev for descriptors struct device *dev_buf_cb; //smmu dev for ubwcp buffers void __iomem *base; //ubwcp base address struct regulator *vdd; struct clk **clocks; int num_clocks; /* interrupts */ int irq_range_ck_rd; int irq_range_ck_wr; int irq_encode; int irq_decode; /* ula address pool */ u64 ula_pool_base; u64 ula_pool_size; struct gen_pool *ula_pool; configure_mmap mmap_config_fptr; /* HW version */ u32 hw_ver_major; u32 hw_ver_minor; /* keep track of all potential buffers. * hash table index'ed using dma_buf ptr. * 2**13 = 8192 hash values */ DECLARE_HASHTABLE(buf_table, 13); /* buffer descriptor */ void *buffer_desc_base; /* CPU address */ dma_addr_t buffer_desc_dma_handle; /* dma address */ size_t buffer_desc_size; struct ubwcp_desc desc_list[UBWCP_BUFFER_DESC_COUNT]; struct ubwcp_image_format_info format_info[INFO_FORMAT_LIST_SIZE]; atomic_t num_non_lin_buffers; bool mem_online; struct mutex desc_lock; /* allocate/free descriptors */ spinlock_t buf_table_lock; /* add/remove dma_buf into list of managed bufffers */ struct mutex mem_hotplug_lock; /* memory hotplug lock */ struct mutex ula_lock; /* allocate/free ula */ struct mutex ubwcp_flush_lock; /* ubwcp flush */ struct mutex hw_range_ck_lock; /* range ck */ struct list_head err_handler_list; /* error handler list */ spinlock_t err_handler_list_lock; /* err_handler_list lock */ }; struct ubwcp_buf { struct hlist_node hnode; struct ubwcp_driver *ubwcp; struct ubwcp_buffer_attrs buf_attr; bool perm; struct ubwcp_desc *desc; bool buf_attr_set; bool locked; enum dma_data_direction lock_dir; int lock_count; /* dma_buf info */ struct dma_buf *dma_buf; struct dma_buf_attachment *attachment; struct sg_table *sgt; /* ula info */ phys_addr_t ula_pa; size_t ula_size; /* meta metadata */ struct ubwcp_hw_meta_metadata mmdata; struct mutex lock; }; static struct ubwcp_driver *me; static int error_print_count; u32 ubwcp_debug_trace_enable; static struct ubwcp_driver *ubwcp_get_driver(void) { if (!me) WARN(1, "ubwcp: driver ptr requested but driver not initialized"); return me; } static void image_format_init(struct ubwcp_driver *ubwcp) { /* planes, bytes/p, Tp , MTp */ ubwcp->format_info[RGBA] = (struct ubwcp_image_format_info) {1, {{4, 1, {16, 4}, {64, 16}}}}; ubwcp->format_info[NV12] = (struct ubwcp_image_format_info) {2, {{1, 1, {32, 8}, {128, 32}}, {2, 1, {16, 8}, { 64, 32}}}}; ubwcp->format_info[NV124R] = (struct ubwcp_image_format_info) {2, {{1, 1, {64, 4}, {256, 16}}, {2, 1, {32, 4}, {128, 16}}}}; ubwcp->format_info[P010] = (struct ubwcp_image_format_info) {2, {{2, 1, {32, 4}, {128, 16}}, {4, 1, {16, 4}, { 64, 16}}}}; ubwcp->format_info[TP10] = (struct ubwcp_image_format_info) {2, {{4, 3, {48, 4}, {192, 16}}, {8, 3, {24, 4}, { 96, 16}}}}; ubwcp->format_info[P016] = (struct ubwcp_image_format_info) {2, {{2, 1, {32, 4}, {128, 16}}, {4, 1, {16, 4}, { 64, 16}}}}; } static void ubwcp_buf_desc_list_init(struct ubwcp_driver *ubwcp) { int idx; struct ubwcp_desc *desc_list = ubwcp->desc_list; for (idx = 0; idx < UBWCP_BUFFER_DESC_COUNT; idx++) { desc_list[idx].idx = -1; desc_list[idx].ptr = NULL; } } static int ubwcp_init_clocks(struct ubwcp_driver *ubwcp, struct device *dev) { const char *cname; struct property *prop; int i; ubwcp->num_clocks = of_property_count_strings(dev->of_node, "clock-names"); if (ubwcp->num_clocks < 1) { ubwcp->num_clocks = 0; return 0; } ubwcp->clocks = devm_kzalloc(dev, sizeof(*ubwcp->clocks) * ubwcp->num_clocks, GFP_KERNEL); if (!ubwcp->clocks) return -ENOMEM; i = 0; of_property_for_each_string(dev->of_node, "clock-names", prop, cname) { struct clk *c = devm_clk_get(dev, cname); if (IS_ERR(c)) { ERR("Couldn't get clock: %s\n", cname); return PTR_ERR(c); } ubwcp->clocks[i] = c; ++i; } return 0; } static int ubwcp_enable_clocks(struct ubwcp_driver *ubwcp) { int i, ret = 0; for (i = 0; i < ubwcp->num_clocks; ++i) { ret = clk_prepare_enable(ubwcp->clocks[i]); if (ret) { ERR("Couldn't enable clock #%d\n", i); while (i--) clk_disable_unprepare(ubwcp->clocks[i]); break; } } return ret; } static void ubwcp_disable_clocks(struct ubwcp_driver *ubwcp) { int i; for (i = ubwcp->num_clocks; i; --i) clk_disable_unprepare(ubwcp->clocks[i - 1]); } /* UBWCP Power control */ static int ubwcp_power(struct ubwcp_driver *ubwcp, bool enable) { int ret = 0; if (!ubwcp) { ERR("ubwcp ptr is NULL"); return -1; } if (!ubwcp->vdd) { ERR("vdd is NULL"); return -1; } if (enable) { ret = regulator_enable(ubwcp->vdd); if (ret < 0) { ERR("regulator_enable failed: %d", ret); ret = -1; } else { DBG("regulator_enable() success"); } if (!ret) { ret = ubwcp_enable_clocks(ubwcp); if (ret) { ERR("enable clocks failed: %d", ret); regulator_disable(ubwcp->vdd); } else { DBG("enable clocks success"); } } } else { ret = regulator_disable(ubwcp->vdd); if (ret < 0) { ERR("regulator_disable failed: %d", ret); ret = -1; } else { DBG("regulator_disable() success"); } if (!ret) { ubwcp_disable_clocks(ubwcp); DBG("disable clocks success"); } } return ret; } static int ubwcp_flush(struct ubwcp_driver *ubwcp) { int ret = 0; mutex_lock(&ubwcp->ubwcp_flush_lock); ret = ubwcp_hw_flush(ubwcp->base); mutex_unlock(&ubwcp->ubwcp_flush_lock); if (ret != 0) WARN(1, "ubwcp_hw_flush() failed!"); return ret; } /* get dma_buf ptr for the given dma_buf fd */ struct dma_buf *ubwcp_dma_buf_fd_to_dma_buf(int dma_buf_fd) { struct dma_buf *dmabuf; /* TBD: dma_buf_get() results in taking ref to buf and it won't ever get * free'ed until ref count goes to 0. So we must reduce the ref count * immediately after we find our corresponding ubwcp_buf. */ dmabuf = dma_buf_get(dma_buf_fd); if (IS_ERR(dmabuf)) { ERR("dmabuf ptr not found for dma_buf_fd = %d", dma_buf_fd); return NULL; } dma_buf_put(dmabuf); return dmabuf; } EXPORT_SYMBOL(ubwcp_dma_buf_fd_to_dma_buf); /* get ubwcp_buf corresponding to the given dma_buf */ static struct ubwcp_buf *dma_buf_to_ubwcp_buf(struct dma_buf *dmabuf) { struct ubwcp_buf *buf = NULL; struct ubwcp_driver *ubwcp = ubwcp_get_driver(); unsigned long flags; if (!dmabuf || !ubwcp) return NULL; spin_lock_irqsave(&ubwcp->buf_table_lock, flags); /* look up ubwcp_buf corresponding to this dma_buf */ hash_for_each_possible(ubwcp->buf_table, buf, hnode, (u64)dmabuf) { if (buf->dma_buf == dmabuf) break; } spin_unlock_irqrestore(&ubwcp->buf_table_lock, flags); return buf; } /* return ubwcp hardware version */ int ubwcp_get_hw_version(struct ubwcp_ioctl_hw_version *ver) { struct ubwcp_driver *ubwcp; FENTRY(); if (!ver) { ERR("invalid version ptr"); return -EINVAL; } ubwcp = ubwcp_get_driver(); if (!ubwcp) return -1; ver->major = ubwcp->hw_ver_major; ver->minor = ubwcp->hw_ver_minor; return 0; } EXPORT_SYMBOL(ubwcp_get_hw_version); static int add_ula_pa_memory(struct ubwcp_driver *ubwcp) { int ret; int nid; nid = memory_add_physaddr_to_nid(ubwcp->ula_pool_base); DBG("calling add_memory()..."); trace_ubwcp_add_memory_start(ubwcp->ula_pool_size); ret = add_memory(nid, ubwcp->ula_pool_base, ubwcp->ula_pool_size, MHP_NONE); trace_ubwcp_add_memory_end(ubwcp->ula_pool_size); if (ret) { ERR("add_memory() failed st:0x%lx sz:0x%lx err: %d", ubwcp->ula_pool_base, ubwcp->ula_pool_size, ret); /* Fix to put driver in invalid state */ } else { DBG("add_memory() ula_pool_base:0x%llx, size:0x%zx, kernel addr:0x%p", ubwcp->ula_pool_base, ubwcp->ula_pool_size, page_to_virt(pfn_to_page(PFN_DOWN(ubwcp->ula_pool_base)))); } return ret; } static int inc_num_non_lin_buffers(struct ubwcp_driver *ubwcp) { int ret = 0; atomic_inc(&ubwcp->num_non_lin_buffers); mutex_lock(&ubwcp->mem_hotplug_lock); if (!ubwcp->mem_online) { if (atomic_read(&ubwcp->num_non_lin_buffers) == 0) { ret = -EINVAL; ERR("Bad state: num_non_lin_buffers should not be 0"); /* Fix to put driver in invalid state */ goto err_power_on; } ret = ubwcp_power(ubwcp, true); if (ret) goto err_power_on; ret = add_ula_pa_memory(ubwcp); if (ret) goto err_add_memory; ubwcp->mem_online = true; } mutex_unlock(&ubwcp->mem_hotplug_lock); return 0; err_add_memory: ubwcp_power(ubwcp, false); err_power_on: atomic_dec(&ubwcp->num_non_lin_buffers); mutex_unlock(&ubwcp->mem_hotplug_lock); return ret; } static int dec_num_non_lin_buffers(struct ubwcp_driver *ubwcp) { int ret = 0; atomic_dec(&ubwcp->num_non_lin_buffers); mutex_lock(&ubwcp->mem_hotplug_lock); /* If this is the last buffer being freed, power off ubwcp */ if (atomic_read(&ubwcp->num_non_lin_buffers) == 0) { unsigned long sync_remain = 0; unsigned long sync_offset = 0; unsigned long sync_size = 0; unsigned long sync_granule = UBWCP_SYNC_GRANULE; DBG("last buffer: ~~~~~~~~~~~"); if (!ubwcp->mem_online) { ret = -EINVAL; ERR("Bad state: mem_online should not be false"); /* Fix to put driver in invalid state */ goto err_remove_mem; } DBG("set_direct_map_range_uncached() for ULA PA pool st:0x%lx num pages:%lu", ubwcp->ula_pool_base, ubwcp->ula_pool_size >> PAGE_SHIFT); trace_ubwcp_set_direct_map_range_uncached_start(ubwcp->ula_pool_size); ret = set_direct_map_range_uncached((unsigned long)phys_to_virt( ubwcp->ula_pool_base), ubwcp->ula_pool_size >> PAGE_SHIFT); trace_ubwcp_set_direct_map_range_uncached_end(ubwcp->ula_pool_size); if (ret) { ERR("set_direct_map_range_uncached failed st:0x%lx num pages:%lu err: %d", ubwcp->ula_pool_base, ubwcp->ula_pool_size >> PAGE_SHIFT, ret); goto err_remove_mem; } else { DBG("DONE: calling set_direct_map_range_uncached() for ULA PA pool"); } DBG("Calling dma_sync_single_for_cpu() for ULA PA pool"); trace_ubwcp_offline_sync_start(ubwcp->ula_pool_size); sync_remain = ubwcp->ula_pool_size; sync_offset = 0; while (sync_remain > 0) { if (atomic_read(&ubwcp->num_non_lin_buffers) > 0) { trace_ubwcp_offline_sync_end(ubwcp->ula_pool_size); DBG("Cancel memory offlining"); DBG("Calling offline_and_remove_memory() for ULA PA pool"); trace_ubwcp_offline_and_remove_memory_start(ubwcp->ula_pool_size); ret = offline_and_remove_memory(ubwcp->ula_pool_base, ubwcp->ula_pool_size); trace_ubwcp_offline_and_remove_memory_end(ubwcp->ula_pool_size); if (ret) { ERR("remove memory failed st:0x%lx sz:0x%lx err: %d", ubwcp->ula_pool_base, ubwcp->ula_pool_size, ret); goto err_remove_mem; } else { DBG("DONE: calling remove memory for ULA PA pool"); } ret = add_ula_pa_memory(ubwcp); if (ret) { ERR("Bad state: failed to add back memory"); /* Fix to put driver in invalid state */ ubwcp->mem_online = false; } mutex_unlock(&ubwcp->mem_hotplug_lock); return ret; } if (sync_granule > sync_remain) { sync_size = sync_remain; sync_remain = 0; } else { sync_size = sync_granule; sync_remain -= sync_granule; } DBG("Partial sync offset:0x%lx size:0x%lx", sync_offset, sync_size); trace_ubwcp_dma_sync_single_for_cpu_start(sync_size); dma_sync_single_for_cpu(ubwcp->dev, ubwcp->ula_pool_base + sync_offset, sync_size, DMA_BIDIRECTIONAL); trace_ubwcp_dma_sync_single_for_cpu_end(sync_size); sync_offset += sync_size; } trace_ubwcp_offline_sync_end(ubwcp->ula_pool_size); DBG("Calling offline_and_remove_memory() for ULA PA pool"); trace_ubwcp_offline_and_remove_memory_start(ubwcp->ula_pool_size); ret = offline_and_remove_memory(ubwcp->ula_pool_base, ubwcp->ula_pool_size); trace_ubwcp_offline_and_remove_memory_end(ubwcp->ula_pool_size); if (ret) { ERR("offline_and_remove_memory failed st:0x%lx sz:0x%lx err: %d", ubwcp->ula_pool_base, ubwcp->ula_pool_size, ret); /* Fix to put driver in invalid state */ goto err_remove_mem; } else { DBG("DONE: calling offline_and_remove_memory() for ULA PA pool"); } DBG("Calling power OFF ..."); ubwcp_power(ubwcp, false); ubwcp->mem_online = false; } mutex_unlock(&ubwcp->mem_hotplug_lock); return 0; err_remove_mem: atomic_inc(&ubwcp->num_non_lin_buffers); mutex_unlock(&ubwcp->mem_hotplug_lock); DBG("returning error: %d", ret); return ret; } /** * * Initialize ubwcp buffer for the given dma_buf. This * initializes ubwcp internal data structures and possibly hw to * use ubwcp for this buffer. * * @param dmabuf : ptr to the buffer to be configured for ubwcp * * @return int : 0 on success, otherwise error code */ static int ubwcp_init_buffer(struct dma_buf *dmabuf) { struct ubwcp_buf *buf; struct ubwcp_driver *ubwcp = ubwcp_get_driver(); unsigned long flags; FENTRY(); trace_ubwcp_init_buffer_start(dmabuf); if (!ubwcp) { trace_ubwcp_init_buffer_end(dmabuf); return -1; } if (!dmabuf) { ERR("NULL dmabuf input ptr"); trace_ubwcp_init_buffer_end(dmabuf); return -EINVAL; } if (dma_buf_to_ubwcp_buf(dmabuf)) { ERR("dma_buf already initialized for ubwcp"); trace_ubwcp_init_buffer_end(dmabuf); return -EEXIST; } buf = kzalloc(sizeof(*buf), GFP_KERNEL); if (!buf) { ERR("failed to alloc for new ubwcp_buf"); trace_ubwcp_init_buffer_end(dmabuf); return -ENOMEM; } mutex_init(&buf->lock); buf->dma_buf = dmabuf; buf->ubwcp = ubwcp; buf->buf_attr.image_format = UBWCP_LINEAR; spin_lock_irqsave(&ubwcp->buf_table_lock, flags); hash_add(ubwcp->buf_table, &buf->hnode, (u64)buf->dma_buf); spin_unlock_irqrestore(&ubwcp->buf_table_lock, flags); trace_ubwcp_init_buffer_end(dmabuf); return 0; } static void dump_attributes(struct ubwcp_buffer_attrs *attr) { DBG_BUF_ATTR(""); DBG_BUF_ATTR("image_format: %d", attr->image_format); DBG_BUF_ATTR("major_ubwc_ver: %d", attr->major_ubwc_ver); DBG_BUF_ATTR("minor_ubwc_ver: %d", attr->minor_ubwc_ver); DBG_BUF_ATTR("compression_type: %d", attr->compression_type); DBG_BUF_ATTR("lossy_params: %llu", attr->lossy_params); DBG_BUF_ATTR("width: %d", attr->width); DBG_BUF_ATTR("height: %d", attr->height); DBG_BUF_ATTR("stride: %d", attr->stride); DBG_BUF_ATTR("scanlines: %d", attr->scanlines); DBG_BUF_ATTR("planar_padding: %d", attr->planar_padding); DBG_BUF_ATTR("subsample: %d", attr->subsample); DBG_BUF_ATTR("sub_system_target: %d", attr->sub_system_target); DBG_BUF_ATTR("y_offset: %d", attr->y_offset); DBG_BUF_ATTR("batch_size: %d", attr->batch_size); DBG_BUF_ATTR(""); } static enum ubwcp_std_image_format to_std_format(u16 ioctl_image_format) { switch (ioctl_image_format) { case UBWCP_RGBA8888: return RGBA; case UBWCP_NV12: case UBWCP_NV12_Y: case UBWCP_NV12_UV: return NV12; case UBWCP_NV124R: case UBWCP_NV124R_Y: case UBWCP_NV124R_UV: return NV124R; case UBWCP_TP10: case UBWCP_TP10_Y: case UBWCP_TP10_UV: return TP10; case UBWCP_P010: case UBWCP_P010_Y: case UBWCP_P010_UV: return P010; case UBWCP_P016: case UBWCP_P016_Y: case UBWCP_P016_UV: return P016; default: WARN(1, "Fix this!!!"); return STD_IMAGE_FORMAT_INVALID; } } static int get_stride_alignment(enum ubwcp_std_image_format format, u16 *align) { switch (format) { case TP10: *align = 64; return 0; case NV12: *align = 128; return 0; case RGBA: case NV124R: case P010: case P016: *align = 256; return 0; default: return -1; } } /* returns stride of compressed image */ static u32 get_compressed_stride(struct ubwcp_driver *ubwcp, enum ubwcp_std_image_format format, u32 width) { struct ubwcp_plane_info p_info; u16 macro_tile_width_p; u16 pixel_bytes; u16 per_pixel; p_info = ubwcp->format_info[format].p_info[0]; macro_tile_width_p = p_info.macrotilesize_p.width; pixel_bytes = p_info.pixel_bytes; per_pixel = p_info.per_pixel; return UBWCP_ALIGN(width, macro_tile_width_p)*pixel_bytes/per_pixel; } /* check if linear stride conforms to hw limitations * always returns false for linear image */ static bool stride_is_valid(struct ubwcp_driver *ubwcp, u16 ioctl_img_fmt, u32 width, u32 lin_stride) { u32 compressed_stride; enum ubwcp_std_image_format format = to_std_format(ioctl_img_fmt); if (format == STD_IMAGE_FORMAT_INVALID) return false; if ((lin_stride < width) || (lin_stride > 64*1024)) { ERR("stride is not valid (width <= stride <= 64K): %d", lin_stride); return false; } if (format == TP10) { if(!IS_ALIGNED(lin_stride, 64)) { ERR("stride must be aligned to 64: %d", lin_stride); return false; } } else { compressed_stride = get_compressed_stride(ubwcp, format, width); if (lin_stride != compressed_stride) { ERR("linear stride: %d must be same as compressed stride: %d", lin_stride, compressed_stride); return false; } } return true; } static bool ioctl_format_is_valid(u16 ioctl_image_format) { switch (ioctl_image_format) { case UBWCP_LINEAR: case UBWCP_RGBA8888: case UBWCP_NV12: case UBWCP_NV12_Y: case UBWCP_NV12_UV: case UBWCP_NV124R: case UBWCP_NV124R_Y: case UBWCP_NV124R_UV: case UBWCP_TP10: case UBWCP_TP10_Y: case UBWCP_TP10_UV: case UBWCP_P010: case UBWCP_P010_Y: case UBWCP_P010_UV: case UBWCP_P016: case UBWCP_P016_Y: case UBWCP_P016_UV: return true; default: return false; } } /* validate buffer attributes */ static bool ubwcp_buf_attrs_valid(struct ubwcp_driver *ubwcp, struct ubwcp_buffer_attrs *attr) { if (!ioctl_format_is_valid(attr->image_format)) { ERR("invalid image format: %d", attr->image_format); goto err; } if (attr->major_ubwc_ver || attr->minor_ubwc_ver) { ERR("major/minor ubwc ver must be 0. major: %d minor: %d", attr->major_ubwc_ver, attr->minor_ubwc_ver); goto err; } if (attr->compression_type != UBWCP_COMPRESSION_LOSSLESS) { ERR("compression_type is not valid: %d", attr->compression_type); goto err; } if (attr->lossy_params != 0) { ERR("lossy_params is not valid: %d", attr->lossy_params); goto err; } //TBD: some upper limit for width? if (attr->width > 10*1024) { ERR("width is invalid (above upper limit): %d", attr->width); goto err; } //TBD: some upper limit for height? if (attr->height > 10*1024) { ERR("height is invalid (above upper limit): %d", attr->height); goto err; } if (attr->image_format != UBWCP_LINEAR) if(!stride_is_valid(ubwcp, attr->image_format, attr->width, attr->stride)) { ERR("stride is invalid: %d", attr->stride); goto err; } if ((attr->scanlines < attr->height) || (attr->scanlines > attr->height + 32*1024)) { ERR("scanlines is not valid - height: %d scanlines: %d", attr->height, attr->scanlines); goto err; } if (attr->planar_padding > 4096) { ERR("planar_padding is not valid. (<= 4096): %d", attr->planar_padding); goto err; } if (attr->subsample != UBWCP_SUBSAMPLE_4_2_0) { ERR("subsample is not valid: %d", attr->subsample); goto err; } if (attr->sub_system_target & ~UBWCP_SUBSYSTEM_TARGET_CPU) { ERR("sub_system_target other that CPU is not supported: %d", attr->sub_system_target); goto err; } if (!(attr->sub_system_target & UBWCP_SUBSYSTEM_TARGET_CPU)) { ERR("sub_system_target is not set to CPU: %d", attr->sub_system_target); goto err; } if (attr->y_offset != 0) { ERR("y_offset is not valid: %d", attr->y_offset); goto err; } if (attr->batch_size != 1) { ERR("batch_size is not valid: %d", attr->batch_size); goto err; } dump_attributes(attr); return true; err: dump_attributes(attr); return false; } /* return true if image format has only Y plane*/ bool ubwcp_image_y_only(u16 format) { switch (format) { case UBWCP_NV12_Y: case UBWCP_NV124R_Y: case UBWCP_TP10_Y: case UBWCP_P010_Y: case UBWCP_P016_Y: return true; default: return false; } } /* return true if image format has only UV plane*/ bool ubwcp_image_uv_only(u16 format) { switch (format) { case UBWCP_NV12_UV: case UBWCP_NV124R_UV: case UBWCP_TP10_UV: case UBWCP_P010_UV: case UBWCP_P016_UV: return true; default: return false; } } /* calculate and return metadata buffer size for a given plane * and buffer attributes * NOTE: in this function, we will only pass in NV12 format. * NOT NV12_Y or NV12_UV etc. * the Y or UV information is in the "plane" * "format" here purely means "encoding format" and no information * if some plane data is missing. */ static size_t metadata_buf_sz(struct ubwcp_driver *ubwcp, enum ubwcp_std_image_format format, u32 width, u32 height, u8 plane) { size_t size; u64 pitch; u64 lines; u64 tile_width; u32 tile_height; struct ubwcp_image_format_info f_info; struct ubwcp_plane_info p_info; f_info = ubwcp->format_info[format]; DBG_BUF_ATTR(""); DBG_BUF_ATTR(""); DBG_BUF_ATTR("Calculating metadata buffer size: format = %d, plane = %d", format, plane); if (plane >= f_info.planes) { ERR("Format does not have requested plane info: format: %d, plane: %d", format, plane); WARN(1, "Fix this!!!!!"); return 0; } p_info = f_info.p_info[plane]; /* UV plane */ if (plane == 1) { width = width/2; height = height/2; } tile_width = p_info.tilesize_p.width; tile_height = p_info.tilesize_p.height; /* pitch: # of tiles in a row * lines: # of tile rows */ pitch = UBWCP_ALIGN((width + tile_width - 1)/tile_width, META_DATA_PITCH_ALIGN); lines = UBWCP_ALIGN((height + tile_height - 1)/tile_height, META_DATA_HEIGHT_ALIGN); DBG_BUF_ATTR("image params : %d x %d (pixels)", width, height); DBG_BUF_ATTR("tile params : %d x %d (pixels)", tile_width, tile_height); DBG_BUF_ATTR("pitch : %d (%d)", pitch, width/tile_width); DBG_BUF_ATTR("lines : %d (%d)", lines, height); DBG_BUF_ATTR("size (p*l*bytes) : %d", pitch*lines*1); /* x1 below is only to clarify that we are multiplying by 1 bytes/tile */ size = UBWCP_ALIGN(pitch*lines*1, META_DATA_SIZE_ALIGN); DBG_BUF_ATTR("size (aligned 4K): %zu (0x%zx)", size, size); return size; } /* calculate and return size of pixel data buffer for a given plane * and buffer attributes */ static size_t pixeldata_buf_sz(struct ubwcp_driver *ubwcp, u16 format, u32 width, u32 height, u8 plane) { size_t size; u64 pitch; u64 lines; u16 pixel_bytes; u16 per_pixel; u64 macro_tile_width_p; u64 macro_tile_height_p; struct ubwcp_image_format_info f_info; struct ubwcp_plane_info p_info; f_info = ubwcp->format_info[format]; DBG_BUF_ATTR(""); DBG_BUF_ATTR(""); DBG_BUF_ATTR("Calculating Pixeldata buffer size: format = %d, plane = %d", format, plane); if (plane >= f_info.planes) { ERR("Format does not have requested plane info: format: %d, plane: %d", format, plane); WARN(1, "Fix this!!!!!"); return 0; } p_info = f_info.p_info[plane]; pixel_bytes = p_info.pixel_bytes; per_pixel = p_info.per_pixel; /* UV plane */ if (plane == 1) { width = width/2; height = height/2; } macro_tile_width_p = p_info.macrotilesize_p.width; macro_tile_height_p = p_info.macrotilesize_p.height; /* align pixel width and height macro tile width and height */ pitch = UBWCP_ALIGN(width, macro_tile_width_p); lines = UBWCP_ALIGN(height, macro_tile_height_p); DBG_BUF_ATTR("image params : %d x %d (pixels)", width, height); DBG_BUF_ATTR("macro tile params: %d x %d (pixels)", macro_tile_width_p, macro_tile_height_p); DBG_BUF_ATTR("bytes_per_pixel : %d/%d", pixel_bytes, per_pixel); DBG_BUF_ATTR("pitch : %d", pitch); DBG_BUF_ATTR("lines : %d", lines); DBG_BUF_ATTR("size (p*l*bytes) : %d", (pitch*lines*pixel_bytes)/per_pixel); size = UBWCP_ALIGN((pitch*lines*pixel_bytes)/per_pixel, PIXEL_DATA_SIZE_ALIGN); DBG_BUF_ATTR("size (aligned 4K): %zu (0x%zx)", size, size); return size; } static int get_tile_height(struct ubwcp_driver *ubwcp, enum ubwcp_std_image_format format, u8 plane) { struct ubwcp_image_format_info f_info; struct ubwcp_plane_info p_info; f_info = ubwcp->format_info[format]; p_info = f_info.p_info[plane]; return p_info.tilesize_p.height; } /* * plane: must be 0 or 1 (1st plane == 0, 2nd plane == 1) */ static size_t ubwcp_ula_size(struct ubwcp_driver *ubwcp, u16 format, u32 stride_b, u32 scanlines, u8 plane, bool add_tile_pad) { size_t size; DBG_BUF_ATTR("%s(format = %d, plane = %d)", __func__, format, plane); /* UV plane */ if (plane == 1) scanlines = scanlines/2; if (add_tile_pad) { int tile_height = get_tile_height(ubwcp, format, plane); /* Align plane size to plane tile height */ scanlines = ((scanlines + tile_height - 1) / tile_height) * tile_height; } size = stride_b*scanlines; DBG_BUF_ATTR("Size of plane-%u: (%u * %u) = %zu (0x%zx)", plane, stride_b, scanlines, size, size); return size; } int missing_plane_from_format(u16 ioctl_image_format) { int missing_plane; switch (ioctl_image_format) { case UBWCP_NV12_Y: missing_plane = 2; break; case UBWCP_NV12_UV: missing_plane = 1; break; case UBWCP_NV124R_Y: missing_plane = 2; break; case UBWCP_NV124R_UV: missing_plane = 1; break; case UBWCP_TP10_Y: missing_plane = 2; break; case UBWCP_TP10_UV: missing_plane = 1; break; case UBWCP_P010_Y: missing_plane = 2; break; case UBWCP_P010_UV: missing_plane = 1; break; case UBWCP_P016_Y: missing_plane = 2; break; case UBWCP_P016_UV: missing_plane = 1; break; default: missing_plane = 0; } return missing_plane; } int planes_in_format(enum ubwcp_std_image_format format) { if (format == RGBA) return 1; else return 2; } unsigned int ubwcp_get_hw_image_format_value(u16 ioctl_image_format) { enum ubwcp_std_image_format format; format = to_std_format(ioctl_image_format); switch (format) { case RGBA: return HW_BUFFER_FORMAT_RGBA; case NV12: return HW_BUFFER_FORMAT_NV12; case NV124R: return HW_BUFFER_FORMAT_NV124R; case P010: return HW_BUFFER_FORMAT_P010; case TP10: return HW_BUFFER_FORMAT_TP10; case P016: return HW_BUFFER_FORMAT_P016; default: WARN(1, "Fix this!!!!!"); return 0; } } static int ubwcp_validate_uv_align(struct ubwcp_driver *ubwcp, struct ubwcp_buffer_attrs *attr, size_t ula_y_plane_size, size_t uv_start_offset) { int ret = 0; size_t ula_y_plane_size_align; size_t y_tile_align_bytes; int y_tile_height; int planes; /* Only validate UV align if there is both a Y and UV plane */ planes = planes_in_format(to_std_format(attr->image_format)); if (planes != 2) return 0; /* Check it is cache line size aligned */ if ((uv_start_offset % 64) != 0) { ret = -EINVAL; ERR("uv_start_offset %zu not cache line aligned", uv_start_offset); goto err; } /* * Check that UV plane does not overlap with any of the Y plane’s tiles */ y_tile_height = get_tile_height(ubwcp, to_std_format(attr->image_format), 0); y_tile_align_bytes = y_tile_height * attr->stride; ula_y_plane_size_align = ((ula_y_plane_size + y_tile_align_bytes - 1) / y_tile_align_bytes) * y_tile_align_bytes; if (uv_start_offset < ula_y_plane_size_align) { ret = -EINVAL; ERR("uv offset %zu less than y plane align %zu for y plane size %zu", uv_start_offset, ula_y_plane_size_align, ula_y_plane_size); goto err; } return 0; err: return ret; } /* calculate ULA buffer parms * TBD: how do we make sure uv_start address (not the offset) * is aligned per requirement: cache line */ static int ubwcp_calc_ula_params(struct ubwcp_driver *ubwcp, struct ubwcp_buffer_attrs *attr, size_t *ula_size, size_t *ula_y_plane_size, size_t *uv_start_offset) { size_t size; enum ubwcp_std_image_format format; int planes; int missing_plane; u32 stride; u32 scanlines; u32 planar_padding; stride = attr->stride; scanlines = attr->scanlines; planar_padding = attr->planar_padding; /* convert ioctl image format to standard image format */ format = to_std_format(attr->image_format); /* Number of "expected" planes in "the standard defined" image format */ planes = planes_in_format(format); /* any plane missing? * valid missing_plane values: * 0 == no plane missing * 1 == 1st plane missing * 2 == 2nd plane missing */ missing_plane = missing_plane_from_format(attr->image_format); DBG_BUF_ATTR("ioctl_image_format : %d, std_format: %d", attr->image_format, format); DBG_BUF_ATTR("planes_in_format : %d", planes); DBG_BUF_ATTR("missing_plane : %d", missing_plane); DBG_BUF_ATTR("Planar Padding : %d", planar_padding); if (planes == 1) { /* uv_start beyond ULA range */ size = ubwcp_ula_size(ubwcp, format, stride, scanlines, 0, true); *uv_start_offset = size; *ula_y_plane_size = size; } else { if (!missing_plane) { /* size for both planes and padding */ /* Don't pad out Y plane as client would not expect this padding */ size = ubwcp_ula_size(ubwcp, format, stride, scanlines, 0, false); *ula_y_plane_size = size; size += planar_padding; *uv_start_offset = size; size += ubwcp_ula_size(ubwcp, format, stride, scanlines, 1, true); } else { if (missing_plane == 2) { /* Y-only image, set uv_start beyond ULA range */ size = ubwcp_ula_size(ubwcp, format, stride, scanlines, 0, true); *uv_start_offset = size; *ula_y_plane_size = size; } else { /* first plane data is not there */ size = ubwcp_ula_size(ubwcp, format, stride, scanlines, 1, true); *uv_start_offset = 0; /* uv data is at the beginning */ *ula_y_plane_size = 0; } } } //TBD: cleanup *ula_size = size; DBG_BUF_ATTR("Before page align: Total ULA_Size: %d (0x%x) (planes + planar padding)", *ula_size, *ula_size); *ula_size = UBWCP_ALIGN(size, 4096); DBG_BUF_ATTR("After page align : Total ULA_Size: %d (0x%x) (planes + planar padding)", *ula_size, *ula_size); return 0; } /* calculate UBWCP buffer parms */ static int ubwcp_calc_ubwcp_buf_params(struct ubwcp_driver *ubwcp, struct ubwcp_buffer_attrs *attr, size_t *md_p0, size_t *pd_p0, size_t *md_p1, size_t *pd_p1, size_t *stride_tp10_b) { int planes; int missing_plane; enum ubwcp_std_image_format format; size_t stride_tp10_p; FENTRY(); /* convert ioctl image format to standard image format */ format = to_std_format(attr->image_format); missing_plane = missing_plane_from_format(attr->image_format); planes = planes_in_format(format); //pass in 0 (RGB) should return 1 DBG_BUF_ATTR("ioctl_image_format : %d, std_format: %d", attr->image_format, format); DBG_BUF_ATTR("planes_in_format : %d", planes); DBG_BUF_ATTR("missing_plane : %d", missing_plane); if (!missing_plane) { *md_p0 = metadata_buf_sz(ubwcp, format, attr->width, attr->height, 0); *pd_p0 = pixeldata_buf_sz(ubwcp, format, attr->width, attr->height, 0); if (planes == 2) { *md_p1 = metadata_buf_sz(ubwcp, format, attr->width, attr->height, 1); *pd_p1 = pixeldata_buf_sz(ubwcp, format, attr->width, attr->height, 1); } } else { if (missing_plane == 1) { *md_p0 = 0; *pd_p0 = 0; *md_p1 = metadata_buf_sz(ubwcp, format, attr->width, attr->height, 1); *pd_p1 = pixeldata_buf_sz(ubwcp, format, attr->width, attr->height, 1); } else { *md_p0 = metadata_buf_sz(ubwcp, format, attr->width, attr->height, 0); *pd_p0 = pixeldata_buf_sz(ubwcp, format, attr->width, attr->height, 0); *md_p1 = 0; *pd_p1 = 0; } } if (format == TP10) { stride_tp10_p = UBWCP_ALIGN(attr->width, 192); *stride_tp10_b = (stride_tp10_p/3) + stride_tp10_p; } else { *stride_tp10_b = 0; } return 0; } /* reserve ULA address space of the given size */ static phys_addr_t ubwcp_ula_alloc(struct ubwcp_driver *ubwcp, size_t size) { phys_addr_t pa; mutex_lock(&ubwcp->ula_lock); pa = gen_pool_alloc(ubwcp->ula_pool, size); DBG("addr: %p, size: %zx", pa, size); mutex_unlock(&ubwcp->ula_lock); return pa; } /* free ULA address space of the given address and size */ static void ubwcp_ula_free(struct ubwcp_driver *ubwcp, phys_addr_t pa, size_t size) { mutex_lock(&ubwcp->ula_lock); if (!gen_pool_has_addr(ubwcp->ula_pool, pa, size)) { ERR("Attempt to free mem not from gen_pool: pa: %p, size: %zx", pa, size); goto err; } DBG("addr: %p, size: %zx", pa, size); gen_pool_free(ubwcp->ula_pool, pa, size); mutex_unlock(&ubwcp->ula_lock); return; err: mutex_unlock(&ubwcp->ula_lock); } /* free up or expand current_pa and return the new pa */ static phys_addr_t ubwcp_ula_realloc(struct ubwcp_driver *ubwcp, phys_addr_t pa, size_t size, size_t new_size) { if (size == new_size) return pa; if (pa) ubwcp_ula_free(ubwcp, pa, size); return ubwcp_ula_alloc(ubwcp, new_size); } /* unmap dma buf */ static void ubwcp_dma_unmap(struct ubwcp_buf *buf) { FENTRY(); if (buf->dma_buf && buf->attachment) { DBG("Calling dma_buf_unmap_attachment()"); dma_buf_unmap_attachment(buf->attachment, buf->sgt, DMA_BIDIRECTIONAL); buf->sgt = NULL; dma_buf_detach(buf->dma_buf, buf->attachment); buf->attachment = NULL; } } /* dma map ubwcp buffer */ static int ubwcp_dma_map(struct ubwcp_buf *buf, struct device *dev, size_t iova_min_size, dma_addr_t *iova) { int ret = 0; struct dma_buf *dma_buf = buf->dma_buf; struct dma_buf_attachment *attachment; struct sg_table *sgt; size_t dma_len; /* Map buffer to SMMU and get IOVA */ attachment = dma_buf_attach(dma_buf, dev); if (IS_ERR(attachment)) { ret = PTR_ERR(attachment); ERR("dma_buf_attach() failed: %d", ret); goto err; } dma_set_max_seg_size(dev, DMA_BIT_MASK(32)); dma_set_seg_boundary(dev, (unsigned long)DMA_BIT_MASK(64)); sgt = dma_buf_map_attachment(attachment, DMA_BIDIRECTIONAL); if (IS_ERR_OR_NULL(sgt)) { ret = PTR_ERR(sgt); ERR("dma_buf_map_attachment() failed: %d", ret); goto err_detach; } if (sgt->nents != 1) { ERR("nents = %d", sgt->nents); goto err_unmap; } /* ensure that dma_buf is big enough for the new attrs */ dma_len = sg_dma_len(sgt->sgl); if (dma_len < iova_min_size) { ERR("dma len: %d is less than min ubwcp buffer size: %d", dma_len, iova_min_size); goto err_unmap; } *iova = sg_dma_address(sgt->sgl); buf->attachment = attachment; buf->sgt = sgt; return ret; err_unmap: dma_buf_unmap_attachment(attachment, sgt, DMA_BIDIRECTIONAL); err_detach: dma_buf_detach(dma_buf, attachment); err: if (!ret) ret = -1; return ret; } static void ubwcp_pixel_to_bytes(struct ubwcp_driver *ubwcp, enum ubwcp_std_image_format format, u32 width_p, u32 height_p, u32 *width_b, u32 *height_b) { u16 pixel_bytes; u16 per_pixel; struct ubwcp_image_format_info f_info; struct ubwcp_plane_info p_info; f_info = ubwcp->format_info[format]; p_info = f_info.p_info[0]; pixel_bytes = p_info.pixel_bytes; per_pixel = p_info.per_pixel; *width_b = (width_p*pixel_bytes)/per_pixel; *height_b = (height_p*pixel_bytes)/per_pixel; } static void reset_buf_attrs(struct ubwcp_buf *buf) { struct ubwcp_hw_meta_metadata *mmdata; struct ubwcp_driver *ubwcp; ubwcp = buf->ubwcp; mmdata = &buf->mmdata; ubwcp_dma_unmap(buf); /* reset ula params */ if (buf->ula_size) { ubwcp_ula_free(ubwcp, buf->ula_pa, buf->ula_size); buf->ula_size = 0; buf->ula_pa = 0; } /* reset ubwcp params */ memset(mmdata, 0, sizeof(*mmdata)); buf->buf_attr_set = false; buf->buf_attr.image_format = UBWCP_LINEAR; } static void print_mmdata_desc(struct ubwcp_hw_meta_metadata *mmdata) { DBG_BUF_ATTR(""); DBG_BUF_ATTR("--------MM_DATA DESC ---------"); DBG_BUF_ATTR("uv_start_addr : 0x%08llx (cache addr) (actual: 0x%llx)", mmdata->uv_start_addr, mmdata->uv_start_addr << 6); DBG_BUF_ATTR("format : 0x%08x", mmdata->format); DBG_BUF_ATTR("stride : 0x%08x (cache addr) (actual: 0x%x)", mmdata->stride, mmdata->stride << 6); DBG_BUF_ATTR("stride_ubwcp : 0x%08x (cache addr) (actual: 0x%zx)", mmdata->stride_ubwcp, mmdata->stride_ubwcp << 6); DBG_BUF_ATTR("metadata_base_y : 0x%08x (page addr) (actual: 0x%llx)", mmdata->metadata_base_y, mmdata->metadata_base_y << 12); DBG_BUF_ATTR("metadata_base_uv: 0x%08x (page addr) (actual: 0x%zx)", mmdata->metadata_base_uv, mmdata->metadata_base_uv << 12); DBG_BUF_ATTR("buffer_y_offset : 0x%08x (page addr) (actual: 0x%zx)", mmdata->buffer_y_offset, mmdata->buffer_y_offset << 12); DBG_BUF_ATTR("buffer_uv_offset: 0x%08x (page addr) (actual: 0x%zx)", mmdata->buffer_uv_offset, mmdata->buffer_uv_offset << 12); DBG_BUF_ATTR("width_height : 0x%08x (width: 0x%x height: 0x%x)", mmdata->width_height, mmdata->width_height >> 16, mmdata->width_height & 0xFFFF); DBG_BUF_ATTR(""); } /* set buffer attributes: * Failure: * If a call to ubwcp_set_buf_attrs() fails, any attributes set from a previously * successful ubwcp_set_buf_attrs() will be also removed. Thus, * ubwcp_set_buf_attrs() implicitly does "unset previous attributes" and * then "try to set these new attributes". * * The result of a failed call to ubwcp_set_buf_attrs() will leave the buffer * in a linear mode, NOT with attributes from earlier successful call. */ int ubwcp_set_buf_attrs(struct dma_buf *dmabuf, struct ubwcp_buffer_attrs *attr) { int ret = 0; size_t ula_size = 0; size_t uv_start_offset = 0; size_t ula_y_plane_size = 0; phys_addr_t ula_pa = 0x0; struct ubwcp_buf *buf; struct ubwcp_driver *ubwcp; size_t metadata_p0; size_t pixeldata_p0; size_t metadata_p1; size_t pixeldata_p1; size_t iova_min_size; size_t stride_tp10_b; dma_addr_t iova_base; struct ubwcp_hw_meta_metadata *mmdata; u64 uv_start; u32 stride_b; u32 width_b; u32 height_b; enum ubwcp_std_image_format std_image_format; bool is_non_lin_buf; FENTRY(); trace_ubwcp_set_buf_attrs_start(dmabuf); if (!dmabuf) { ERR("NULL dmabuf input ptr"); trace_ubwcp_set_buf_attrs_end(dmabuf); return -EINVAL; } if (!attr) { ERR("NULL attr ptr"); trace_ubwcp_set_buf_attrs_end(dmabuf); return -EINVAL; } buf = dma_buf_to_ubwcp_buf(dmabuf); if (!buf) { ERR("No corresponding ubwcp_buf for the passed in dma_buf"); trace_ubwcp_set_buf_attrs_end(dmabuf); return -EINVAL; } mutex_lock(&buf->lock); if (buf->locked) { ERR("Cannot set attr when buffer is locked"); ret = -EBUSY; goto unlock; } ubwcp = buf->ubwcp; mmdata = &buf->mmdata; is_non_lin_buf = (buf->buf_attr.image_format != UBWCP_LINEAR); //TBD: now that we have single exit point for all errors, //we can limit this call to error only? //also see if this can be part of reset_buf_attrs() DBG_BUF_ATTR("resetting mmap to linear"); /* remove any earlier dma buf mmap configuration */ ret = ubwcp->mmap_config_fptr(buf->dma_buf, true, 0, 0); if (ret) { ERR("dma_buf_mmap_config() failed: %d", ret); goto unlock; } if (!ubwcp_buf_attrs_valid(ubwcp, attr)) { ERR("Invalid buf attrs"); goto err; } if (attr->image_format == UBWCP_LINEAR) { DBG_BUF_ATTR("Linear format requested"); /* linear format request with permanent range xlation doesn't * make sense. need to define behavior if this happens. * note: with perm set, desc is allocated to this buffer. */ //TBD: UBWCP_ASSERT(!buf->perm); if (buf->buf_attr_set) reset_buf_attrs(buf); if (is_non_lin_buf) { /* * Changing buffer from ubwc to linear so decrement * number of ubwc buffers */ ret = dec_num_non_lin_buffers(ubwcp); } mutex_unlock(&buf->lock); trace_ubwcp_set_buf_attrs_end(dmabuf); return ret; } std_image_format = to_std_format(attr->image_format); if (std_image_format == STD_IMAGE_FORMAT_INVALID) { ERR("Unable to map ioctl image format to std image format"); goto err; } /* Calculate uncompressed-buffer size. */ DBG_BUF_ATTR(""); DBG_BUF_ATTR(""); DBG_BUF_ATTR("Calculating ula params -->"); ret = ubwcp_calc_ula_params(ubwcp, attr, &ula_size, &ula_y_plane_size, &uv_start_offset); if (ret) { ERR("ubwcp_calc_ula_params() failed: %d", ret); goto err; } ret = ubwcp_validate_uv_align(ubwcp, attr, ula_y_plane_size, uv_start_offset); if (ret) { ERR("ubwcp_validate_uv_align() failed: %d", ret); goto err; } DBG_BUF_ATTR(""); DBG_BUF_ATTR(""); DBG_BUF_ATTR("Calculating ubwcp params -->"); ret = ubwcp_calc_ubwcp_buf_params(ubwcp, attr, &metadata_p0, &pixeldata_p0, &metadata_p1, &pixeldata_p1, &stride_tp10_b); if (ret) { ERR("ubwcp_calc_buf_params() failed: %d", ret); goto err; } iova_min_size = metadata_p0 + pixeldata_p0 + metadata_p1 + pixeldata_p1; DBG_BUF_ATTR(""); DBG_BUF_ATTR(""); DBG_BUF_ATTR("------Summary ULA Calculated Params ------"); DBG_BUF_ATTR("ULA Size : %8zu (0x%8zx)", ula_size, ula_size); DBG_BUF_ATTR("UV Start Offset : %8zu (0x%8zx)", uv_start_offset, uv_start_offset); DBG_BUF_ATTR("------Summary UBCP Calculated Params ------"); DBG_BUF_ATTR("metadata_p0 : %8d (0x%8zx)", metadata_p0, metadata_p0); DBG_BUF_ATTR("pixeldata_p0 : %8d (0x%8zx)", pixeldata_p0, pixeldata_p0); DBG_BUF_ATTR("metadata_p1 : %8d (0x%8zx)", metadata_p1, metadata_p1); DBG_BUF_ATTR("pixeldata_p1 : %8d (0x%8zx)", pixeldata_p1, pixeldata_p1); DBG_BUF_ATTR("stride_tp10 : %8d (0x%8zx)", stride_tp10_b, stride_tp10_b); DBG_BUF_ATTR("iova_min_size : %8d (0x%8zx)", iova_min_size, iova_min_size); DBG_BUF_ATTR(""); if (buf->buf_attr_set) { /* if buf attr were previously set, these must not be 0 */ /* TBD: do we need this check in production code? */ if (!buf->ula_pa) { WARN(1, "ula_pa cannot be 0 if buf_attr_set is true!!!"); goto err; } if (!buf->ula_size) { WARN(1, "ula_size cannot be 0 if buf_attr_set is true!!!"); goto err; } } /* assign ULA PA with uncompressed-size range */ ula_pa = ubwcp_ula_realloc(ubwcp, buf->ula_pa, buf->ula_size, ula_size); if (!ula_pa) { ERR("ubwcp_ula_alloc/realloc() failed. running out of ULA PA space?"); goto err; } buf->ula_size = ula_size; buf->ula_pa = ula_pa; DBG_BUF_ATTR("Allocated ULA_PA: 0x%p of size: 0x%zx", ula_pa, ula_size); DBG_BUF_ATTR(""); /* inform ULA-PA to dma-heap: needed for dma-heap to do CMOs later on */ DBG_BUF_ATTR("Calling mmap_config(): ULA_PA: 0x%p size: 0x%zx", ula_pa, ula_size); ret = ubwcp->mmap_config_fptr(buf->dma_buf, false, buf->ula_pa, buf->ula_size); if (ret) { ERR("dma_buf_mmap_config() failed: %d", ret); goto err; } /* dma map only the first time attribute is set */ if (!buf->buf_attr_set) { /* linear -> ubwcp. map ubwcp buffer */ ret = ubwcp_dma_map(buf, ubwcp->dev_buf_cb, iova_min_size, &iova_base); if (ret) { ERR("ubwcp_dma_map() failed: %d", ret); goto err; } DBG_BUF_ATTR("dma_buf IOVA range: 0x%llx + min_size (0x%zx): 0x%llx", iova_base, iova_min_size, iova_base + iova_min_size); } uv_start = ula_pa + uv_start_offset; if (!IS_ALIGNED(uv_start, 64)) { ERR("ERROR: uv_start is NOT aligned to cache line"); goto err; } /* Convert height and width to bytes for writing to mmdata */ if (std_image_format != TP10) { ubwcp_pixel_to_bytes(ubwcp, std_image_format, attr->width, attr->height, &width_b, &height_b); } else { /* for tp10 image compression, we need to program p010 width/height */ ubwcp_pixel_to_bytes(ubwcp, P010, attr->width, attr->height, &width_b, &height_b); } stride_b = attr->stride; /* create the mmdata descriptor */ memset(mmdata, 0, sizeof(*mmdata)); mmdata->uv_start_addr = CACHE_ADDR(uv_start); mmdata->format = ubwcp_get_hw_image_format_value(attr->image_format); if (std_image_format != TP10) { mmdata->stride = CACHE_ADDR(stride_b); /* uncompressed stride */ } else { mmdata->stride = CACHE_ADDR(stride_tp10_b); /* compressed stride */ mmdata->stride_ubwcp = CACHE_ADDR(stride_b); /* uncompressed stride */ } mmdata->metadata_base_y = PAGE_ADDR(iova_base); mmdata->metadata_base_uv = PAGE_ADDR(iova_base + metadata_p0 + pixeldata_p0); mmdata->buffer_y_offset = PAGE_ADDR(metadata_p0); mmdata->buffer_uv_offset = PAGE_ADDR(metadata_p1); /* NOTE: For version 1.1, both width & height needs to be in bytes. * For other versions, width in bytes & height in pixels. */ if ((ubwcp->hw_ver_major == 1) && (ubwcp->hw_ver_minor == 1)) mmdata->width_height = width_b << 16 | height_b; else mmdata->width_height = width_b << 16 | attr->height; print_mmdata_desc(mmdata); if (!is_non_lin_buf) { /* * Changing buffer from linear to ubwc so increment * number of ubwc buffers */ ret = inc_num_non_lin_buffers(ubwcp); } if (ret) { ERR("inc_num_non_lin_buffers failed: %d", ret); goto err; } buf->buf_attr = *attr; buf->buf_attr_set = true; //TBD: UBWCP_ASSERT(!buf->perm); mutex_unlock(&buf->lock); trace_ubwcp_set_buf_attrs_end(dmabuf); return 0; err: reset_buf_attrs(buf); if (is_non_lin_buf) { /* * Changing buffer from ubwc to linear so decrement * number of ubwc buffers */ dec_num_non_lin_buffers(ubwcp); } unlock: mutex_unlock(&buf->lock); if (!ret) ret = -1; trace_ubwcp_set_buf_attrs_end(dmabuf); return ret; } EXPORT_SYMBOL(ubwcp_set_buf_attrs); /* Set buffer attributes ioctl */ static int ubwcp_set_buf_attrs_ioctl(struct ubwcp_ioctl_buffer_attrs *attr_ioctl) { struct dma_buf *dmabuf; dmabuf = ubwcp_dma_buf_fd_to_dma_buf(attr_ioctl->fd); return ubwcp_set_buf_attrs(dmabuf, &attr_ioctl->attr); } /* Free up the buffer descriptor */ static void ubwcp_buf_desc_free(struct ubwcp_driver *ubwcp, struct ubwcp_desc *desc) { int idx = desc->idx; struct ubwcp_desc *desc_list = ubwcp->desc_list; mutex_lock(&ubwcp->desc_lock); desc_list[idx].idx = -1; desc_list[idx].ptr = NULL; DBG("freed descriptor_id: %d", idx); mutex_unlock(&ubwcp->desc_lock); } /* Allocate next available buffer descriptor. */ static struct ubwcp_desc *ubwcp_buf_desc_allocate(struct ubwcp_driver *ubwcp) { int idx; struct ubwcp_desc *desc_list = ubwcp->desc_list; mutex_lock(&ubwcp->desc_lock); for (idx = 0; idx < UBWCP_BUFFER_DESC_COUNT; idx++) { if (desc_list[idx].idx == -1) { desc_list[idx].idx = idx; desc_list[idx].ptr = ubwcp->buffer_desc_base + idx*UBWCP_BUFFER_DESC_OFFSET; DBG("allocated descriptor_id: %d", idx); mutex_unlock(&ubwcp->desc_lock); return &desc_list[idx]; } } mutex_unlock(&ubwcp->desc_lock); return NULL; } /** * Lock buffer for CPU access. This prepares ubwcp hw to allow * CPU access to the compressed buffer. It will perform * necessary address translation configuration and cache maintenance ops * so that CPU can safely access ubwcp buffer, if this call is * successful. * Allocate descriptor if not already, * perform CMO and then enable range check * * @param dmabuf : ptr to the dma buf * @param direction : direction of access * * @return int : 0 on success, otherwise error code */ static int ubwcp_lock(struct dma_buf *dmabuf, enum dma_data_direction dir) { int ret = 0; struct ubwcp_buf *buf; struct ubwcp_driver *ubwcp; FENTRY(); trace_ubwcp_lock_start(dmabuf); if (!dmabuf) { ERR("NULL dmabuf input ptr"); trace_ubwcp_lock_end(dmabuf); return -EINVAL; } if (!valid_dma_direction(dir)) { ERR("invalid direction: %d", dir); trace_ubwcp_lock_end(dmabuf); return -EINVAL; } buf = dma_buf_to_ubwcp_buf(dmabuf); if (!buf) { ERR("ubwcp_buf ptr not found"); trace_ubwcp_lock_end(dmabuf); return -1; } mutex_lock(&buf->lock); if (!buf->buf_attr_set) { ERR("lock() called on buffer, but attr not set"); goto err; } if (buf->buf_attr.image_format == UBWCP_LINEAR) { ERR("lock() called on linear buffer"); goto err; } if (!buf->locked) { DBG("first lock on buffer"); ubwcp = buf->ubwcp; /* buf->desc could already be allocated because of perm range xlation */ if (!buf->desc) { /* allocate a buffer descriptor */ buf->desc = ubwcp_buf_desc_allocate(buf->ubwcp); if (!buf->desc) { ERR("ubwcp_allocate_buf_desc() failed"); goto err; } memcpy(buf->desc->ptr, &buf->mmdata, sizeof(buf->mmdata)); /* Flushing of updated mmdata: * mmdata is iocoherent and ubwcp will get it from CPU cache - * *as long as* it has not cached that itself during previous * access to the same descriptor. * * During unlock of previous use of this descriptor, * we do hw flush, which will get rid of this mmdata from * ubwcp cache. * * In addition, we also do a hw flush after enable_range_ck(). * That will also get rid of any speculative fetch of mmdata * by the ubwcp hw. At this time, the assumption is that ubwcp * will cache mmdata only for active descriptor. But if ubwcp * is speculatively fetching mmdata for all descriptors * (irrespetive of enabled or not), the flush during lock * will be necessary to make sure ubwcp sees updated mmdata * that we just updated */ /* program ULA range for this buffer */ DBG("setting range check: descriptor_id: %d, addr: %p, size: %zx", buf->desc->idx, buf->ula_pa, buf->ula_size); ubwcp_hw_set_range_check(ubwcp->base, buf->desc->idx, buf->ula_pa, buf->ula_size); } /* enable range check */ DBG("enabling range check, descriptor_id: %d", buf->desc->idx); mutex_lock(&ubwcp->hw_range_ck_lock); ubwcp_hw_enable_range_check(ubwcp->base, buf->desc->idx); mutex_unlock(&ubwcp->hw_range_ck_lock); /* Flush/invalidate UBWCP caches */ /* Why: cpu could have done a speculative fetch before * enable_range_ck() and ubwcp in process of returning "default" data * we don't want that stashing of default data pending. * we force completion of that and then we also cpu invalidate which * will get rid of that line. */ trace_ubwcp_hw_flush_start(buf->ula_size); ubwcp_flush(ubwcp); trace_ubwcp_hw_flush_end(buf->ula_size); /* Flush/invalidate ULA PA from CPU caches * TBD: if (dir == READ or BIDIRECTION) //NOT for write * -- Confirm with Chris if this can be skipped for write */ trace_ubwcp_dma_sync_single_for_cpu_start(buf->ula_size); dma_sync_single_for_cpu(ubwcp->dev, buf->ula_pa, buf->ula_size, dir); trace_ubwcp_dma_sync_single_for_cpu_end(buf->ula_size); buf->lock_dir = dir; buf->locked = true; } else { DBG("buf already locked"); /* TBD: what if new buffer direction is not same as previous? * must update the dir. */ } buf->lock_count++; DBG("new lock_count: %d", buf->lock_count); mutex_unlock(&buf->lock); trace_ubwcp_lock_end(dmabuf); return ret; err: mutex_unlock(&buf->lock); if (!ret) ret = -1; trace_ubwcp_lock_end(dmabuf); return ret; } /* This can be called as a result of external unlock() call or * internally if free() is called without unlock(). */ static int unlock_internal(struct ubwcp_buf *buf, enum dma_data_direction dir, bool free_buffer) { int ret = 0; struct ubwcp_driver *ubwcp; DBG("current lock_count: %d", buf->lock_count); if (free_buffer) { buf->lock_count = 0; DBG("Forced lock_count: %d", buf->lock_count); } else { buf->lock_count--; DBG("new lock_count: %d", buf->lock_count); if (buf->lock_count) { DBG("more than 1 lock on buffer. waiting until last unlock"); return 0; } } ubwcp = buf->ubwcp; /* Flush/invalidate ULA PA from CPU caches */ //TBD: if (dir == WRITE or BIDIRECTION) trace_ubwcp_dma_sync_single_for_device_start(buf->ula_size); dma_sync_single_for_device(ubwcp->dev, buf->ula_pa, buf->ula_size, dir); trace_ubwcp_dma_sync_single_for_device_end(buf->ula_size); /* disable range check with ubwcp flush */ DBG("disabling range check"); //TBD: could combine these 2 locks into a single lock to make it simpler mutex_lock(&ubwcp->ubwcp_flush_lock); mutex_lock(&ubwcp->hw_range_ck_lock); trace_ubwcp_hw_flush_start(buf->ula_size); ret = ubwcp_hw_disable_range_check_with_flush(ubwcp->base, buf->desc->idx); trace_ubwcp_hw_flush_end(buf->ula_size); if (ret) ERR("disable_range_check_with_flush() failed: %d", ret); mutex_unlock(&ubwcp->hw_range_ck_lock); mutex_unlock(&ubwcp->ubwcp_flush_lock); /* release descriptor if perm range xlation is not set */ if (!buf->perm) { ubwcp_buf_desc_free(buf->ubwcp, buf->desc); buf->desc = NULL; } buf->locked = false; return ret; } /** * Unlock buffer from CPU access. This prepares ubwcp hw to * safely allow for device access to the compressed buffer including any * necessary cache maintenance ops. It may also free up certain ubwcp * resources that could result in error when accessed by CPU in * unlocked state. * * @param dmabuf : ptr to the dma buf * @param direction : direction of access * * @return int : 0 on success, otherwise error code */ static int ubwcp_unlock(struct dma_buf *dmabuf, enum dma_data_direction dir) { struct ubwcp_buf *buf; int ret; FENTRY(); trace_ubwcp_unlock_start(dmabuf); if (!dmabuf) { ERR("NULL dmabuf input ptr"); trace_ubwcp_unlock_end(dmabuf); return -EINVAL; } if (!valid_dma_direction(dir)) { ERR("invalid direction: %d", dir); trace_ubwcp_unlock_end(dmabuf); return -EINVAL; } buf = dma_buf_to_ubwcp_buf(dmabuf); if (!buf) { ERR("ubwcp_buf not found"); trace_ubwcp_unlock_end(dmabuf); return -1; } if (!buf->locked) { ERR("unlock() called on buffer which not in locked state"); trace_ubwcp_unlock_end(dmabuf); return -1; } error_print_count = 0; mutex_lock(&buf->lock); ret = unlock_internal(buf, dir, false); mutex_unlock(&buf->lock); trace_ubwcp_unlock_end(dmabuf); return ret; } /* Return buffer attributes for the given buffer */ int ubwcp_get_buf_attrs(struct dma_buf *dmabuf, struct ubwcp_buffer_attrs *attr) { int ret = 0; struct ubwcp_buf *buf; FENTRY(); if (!dmabuf) { ERR("NULL dmabuf input ptr"); return -EINVAL; } if (!attr) { ERR("NULL attr ptr"); return -EINVAL; } buf = dma_buf_to_ubwcp_buf(dmabuf); if (!buf) { ERR("ubwcp_buf ptr not found"); return -1; } mutex_lock(&buf->lock); if (!buf->buf_attr_set) { ERR("buffer attributes not set"); mutex_unlock(&buf->lock); return -1; } *attr = buf->buf_attr; mutex_unlock(&buf->lock); return ret; } EXPORT_SYMBOL(ubwcp_get_buf_attrs); /* Set permanent range translation. * enable: Descriptor will be reserved for this buffer until disabled, * making lock/unlock quicker. * disable: Descriptor will not be reserved for this buffer. Instead, * descriptor will be allocated and released for each lock/unlock. * If currently allocated but not being used, descriptor will be * released. */ int ubwcp_set_perm_range_translation(struct dma_buf *dmabuf, bool enable) { int ret = 0; struct ubwcp_buf *buf; FENTRY(); if (!dmabuf) { ERR("NULL dmabuf input ptr"); return -EINVAL; } buf = dma_buf_to_ubwcp_buf(dmabuf); if (!buf) { ERR("ubwcp_buf not found"); return -1; } /* not implemented */ if (1) { ERR("API not implemented yet"); return -1; } /* TBD: make sure we acquire buf lock while setting this so there is * no race condition with attr_set/lock/unlock */ buf->perm = enable; /* if "disable" and we have allocated a desc and it is not being * used currently, release it */ if (!enable && buf->desc && !buf->locked) { ubwcp_buf_desc_free(buf->ubwcp, buf->desc); buf->desc = NULL; /* Flush/invalidate UBWCP caches */ //TBD: need to do anything? } return ret; } EXPORT_SYMBOL(ubwcp_set_perm_range_translation); /** * Free up ubwcp resources for this buffer. * * @param dmabuf : ptr to the dma buf * * @return int : 0 on success, otherwise error code */ static int ubwcp_free_buffer(struct dma_buf *dmabuf) { int ret = 0; struct ubwcp_buf *buf; struct ubwcp_driver *ubwcp; unsigned long flags; bool is_non_lin_buf; FENTRY(); trace_ubwcp_free_buffer_start(dmabuf); if (!dmabuf) { ERR("NULL dmabuf input ptr"); trace_ubwcp_free_buffer_end(dmabuf); return -EINVAL; } buf = dma_buf_to_ubwcp_buf(dmabuf); if (!buf) { ERR("ubwcp_buf ptr not found"); trace_ubwcp_free_buffer_end(dmabuf); return -1; } mutex_lock(&buf->lock); ubwcp = buf->ubwcp; is_non_lin_buf = (buf->buf_attr.image_format != UBWCP_LINEAR); if (buf->locked) { DBG("free() called without unlock. unlock()'ing first..."); ret = unlock_internal(buf, buf->lock_dir, true); if (ret) ERR("unlock_internal(): failed : %d, but continuing free()", ret); } /* if we are still holding a desc, release it. this can happen only if perm == true */ if (buf->desc) { WARN_ON(!buf->perm); /* TBD: change to BUG() later...*/ ubwcp_buf_desc_free(buf->ubwcp, buf->desc); buf->desc = NULL; } if (buf->buf_attr_set) reset_buf_attrs(buf); spin_lock_irqsave(&ubwcp->buf_table_lock, flags); hash_del(&buf->hnode); spin_unlock_irqrestore(&ubwcp->buf_table_lock, flags); kfree(buf); if (is_non_lin_buf) dec_num_non_lin_buffers(ubwcp); trace_ubwcp_free_buffer_end(dmabuf); return 0; } /* file open: TBD: increment ref count? */ static int ubwcp_open(struct inode *i, struct file *f) { return 0; } /* file open: TBD: decrement ref count? */ static int ubwcp_close(struct inode *i, struct file *f) { return 0; } /* handle IOCTLs */ static long ubwcp_ioctl(struct file *file, unsigned int ioctl_num, unsigned long ioctl_param) { struct ubwcp_ioctl_buffer_attrs buf_attr_ioctl; struct ubwcp_ioctl_hw_version hw_ver; struct ubwcp_ioctl_validate_stride validate_stride_ioctl; struct ubwcp_ioctl_stride_align stride_align_ioctl; enum ubwcp_std_image_format format; struct ubwcp_driver *ubwcp; switch (ioctl_num) { case UBWCP_IOCTL_SET_BUF_ATTR: if (copy_from_user(&buf_attr_ioctl, (const void __user *) ioctl_param, sizeof(buf_attr_ioctl))) { ERR("ERROR: copy_from_user() failed"); return -EFAULT; } DBG("IOCTL : SET_BUF_ATTR: fd = %d", buf_attr_ioctl.fd); return ubwcp_set_buf_attrs_ioctl(&buf_attr_ioctl); case UBWCP_IOCTL_GET_HW_VER: DBG("IOCTL : GET_HW_VER"); ubwcp_get_hw_version(&hw_ver); if (copy_to_user((void __user *)ioctl_param, &hw_ver, sizeof(hw_ver))) { ERR("ERROR: copy_to_user() failed"); return -EFAULT; } break; case UBWCP_IOCTL_GET_STRIDE_ALIGN: DBG("IOCTL : GET_STRIDE_ALIGN"); if (copy_from_user(&stride_align_ioctl, (const void __user *) ioctl_param, sizeof(stride_align_ioctl))) { ERR("ERROR: copy_from_user() failed"); return -EFAULT; } format = to_std_format(stride_align_ioctl.image_format); if (format == STD_IMAGE_FORMAT_INVALID) return -EINVAL; if (stride_align_ioctl.unused != 0) return -EINVAL; if (get_stride_alignment(format, &stride_align_ioctl.stride_align)) { ERR("ERROR: copy_to_user() failed"); return -EFAULT; } if (copy_to_user((void __user *)ioctl_param, &stride_align_ioctl, sizeof(stride_align_ioctl))) { ERR("ERROR: copy_to_user() failed"); return -EFAULT; } break; case UBWCP_IOCTL_VALIDATE_STRIDE: DBG("IOCTL : VALIDATE_STRIDE"); ubwcp = ubwcp_get_driver(); if (!ubwcp) return -EINVAL; if (copy_from_user(&validate_stride_ioctl, (const void __user *) ioctl_param, sizeof(validate_stride_ioctl))) { ERR("ERROR: copy_from_user() failed"); return -EFAULT; } format = to_std_format(validate_stride_ioctl.image_format); if (format == STD_IMAGE_FORMAT_INVALID) { ERR("ERROR: invalid format: %d", validate_stride_ioctl.image_format); return -EINVAL; } if (validate_stride_ioctl.unused1 || validate_stride_ioctl.unused2) { ERR("ERROR: unused values must be set to 0"); return -EINVAL; } validate_stride_ioctl.valid = stride_is_valid(ubwcp, validate_stride_ioctl.image_format, validate_stride_ioctl.width, validate_stride_ioctl.stride); if (copy_to_user((void __user *)ioctl_param, &validate_stride_ioctl, sizeof(validate_stride_ioctl))) { ERR("ERROR: copy_to_user() failed"); return -EFAULT; } break; default: ERR("Invalid ioctl_num = %d", ioctl_num); return -EINVAL; } return 0; } static const struct file_operations ubwcp_fops = { .owner = THIS_MODULE, .open = ubwcp_open, .release = ubwcp_close, .unlocked_ioctl = ubwcp_ioctl, }; static int ubwcp_debugfs_init(struct ubwcp_driver *ubwcp) { struct dentry *debugfs_root; debugfs_root = debugfs_create_dir("ubwcp", NULL); if (!debugfs_root) { pr_warn("Failed to create debugfs for ubwcp\n"); return -1; } debugfs_create_u32("debug_trace_enable", 0644, debugfs_root, &ubwcp_debug_trace_enable); ubwcp->debugfs_root = debugfs_root; return 0; } static void ubwcp_debugfs_deinit(struct ubwcp_driver *ubwcp) { debugfs_remove_recursive(ubwcp->debugfs_root); } /* ubwcp char device initialization */ static int ubwcp_cdev_init(struct ubwcp_driver *ubwcp) { int ret; dev_t devt; struct class *dev_class; struct device *dev_sys; /* allocate major device number (/proc/devices -> major_num ubwcp) */ ret = alloc_chrdev_region(&devt, 0, UBWCP_NUM_DEVICES, UBWCP_DEVICE_NAME); if (ret) { ERR("alloc_chrdev_region() failed: %d", ret); return ret; } /* create device class (/sys/class/ubwcp_class) */ dev_class = class_create(THIS_MODULE, "ubwcp_class"); if (IS_ERR(dev_class)) { ERR("class_create() failed"); return -1; } /* Create device and register with sysfs * (/sys/class/ubwcp_class/ubwcp/... -> dev/power/subsystem/uevent) */ dev_sys = device_create(dev_class, NULL, devt, NULL, UBWCP_DEVICE_NAME); if (IS_ERR(dev_sys)) { ERR("device_create() failed"); return -1; } /* register file operations and get cdev */ cdev_init(&ubwcp->cdev, &ubwcp_fops); /* associate cdev and device major/minor with file system * can do file ops on /dev/ubwcp after this */ ret = cdev_add(&ubwcp->cdev, devt, 1); if (ret) { ERR("cdev_add() failed"); return -1; } ubwcp->devt = devt; ubwcp->dev_class = dev_class; ubwcp->dev_sys = dev_sys; return 0; } static void ubwcp_cdev_deinit(struct ubwcp_driver *ubwcp) { device_destroy(ubwcp->dev_class, ubwcp->devt); class_destroy(ubwcp->dev_class); cdev_del(&ubwcp->cdev); unregister_chrdev_region(ubwcp->devt, UBWCP_NUM_DEVICES); } struct handler_node { struct list_head list; u32 client_id; ubwcp_error_handler_t handler; void *data; }; int ubwcp_register_error_handler(u32 client_id, ubwcp_error_handler_t handler, void *data) { struct handler_node *node; unsigned long flags; struct ubwcp_driver *ubwcp = ubwcp_get_driver(); if (!ubwcp) return -EINVAL; if (client_id != -1) return -EINVAL; if (!handler) return -EINVAL; node = kzalloc(sizeof(*node), GFP_KERNEL); if (!node) return -ENOMEM; node->client_id = client_id; node->handler = handler; node->data = data; spin_lock_irqsave(&ubwcp->err_handler_list_lock, flags); list_add_tail(&node->list, &ubwcp->err_handler_list); spin_unlock_irqrestore(&ubwcp->err_handler_list_lock, flags); return 0; } EXPORT_SYMBOL(ubwcp_register_error_handler); static void ubwcp_notify_error_handlers(struct ubwcp_err_info *err) { struct handler_node *node; unsigned long flags; struct ubwcp_driver *ubwcp = ubwcp_get_driver(); if (!ubwcp) return; spin_lock_irqsave(&ubwcp->err_handler_list_lock, flags); list_for_each_entry(node, &ubwcp->err_handler_list, list) node->handler(err, node->data); spin_unlock_irqrestore(&ubwcp->err_handler_list_lock, flags); } int ubwcp_unregister_error_handler(u32 client_id) { int ret = -EINVAL; struct handler_node *node; unsigned long flags; struct ubwcp_driver *ubwcp = ubwcp_get_driver(); if (!ubwcp) return -EINVAL; spin_lock_irqsave(&ubwcp->err_handler_list_lock, flags); list_for_each_entry(node, &ubwcp->err_handler_list, list) if (node->client_id == client_id) { list_del(&node->list); kfree(node); ret = 0; break; } spin_unlock_irqrestore(&ubwcp->err_handler_list_lock, flags); return ret; } EXPORT_SYMBOL(ubwcp_unregister_error_handler); /* get ubwcp_buf corresponding to the ULA PA*/ static struct dma_buf *get_dma_buf_from_ulapa(phys_addr_t addr) { struct ubwcp_buf *buf = NULL; struct dma_buf *ret_buf = NULL; struct ubwcp_driver *ubwcp = ubwcp_get_driver(); unsigned long flags; u32 i; if (!ubwcp) return NULL; spin_lock_irqsave(&ubwcp->buf_table_lock, flags); hash_for_each(ubwcp->buf_table, i, buf, hnode) { if (buf->ula_pa <= addr && addr < buf->ula_pa + buf->ula_size) { ret_buf = buf->dma_buf; break; } } spin_unlock_irqrestore(&ubwcp->buf_table_lock, flags); return ret_buf; } /* get ubwcp_buf corresponding to the IOVA*/ static struct dma_buf *get_dma_buf_from_iova(unsigned long addr) { struct ubwcp_buf *buf = NULL; struct dma_buf *ret_buf = NULL; struct ubwcp_driver *ubwcp = ubwcp_get_driver(); unsigned long flags; u32 i; if (!ubwcp) return NULL; spin_lock_irqsave(&ubwcp->buf_table_lock, flags); hash_for_each(ubwcp->buf_table, i, buf, hnode) { unsigned long iova_base; unsigned int iova_size; if (!buf->sgt) continue; iova_base = sg_dma_address(buf->sgt->sgl); iova_size = sg_dma_len(buf->sgt->sgl); if (iova_base <= addr && addr < iova_base + iova_size) { ret_buf = buf->dma_buf; break; } } spin_unlock_irqrestore(&ubwcp->buf_table_lock, flags); return ret_buf; } #define ERR_PRINT_COUNT_MAX 21 /* TBD: use proper rate limit for debug prints */ int ubwcp_iommu_fault_handler(struct iommu_domain *domain, struct device *dev, unsigned long iova, int flags, void *data) { int ret = 0; struct ubwcp_err_info err; struct ubwcp_driver *ubwcp = ubwcp_get_driver(); struct device *cb_dev = (struct device *)data; if (!ubwcp) { ret = -EINVAL; goto err; } error_print_count++; if (error_print_count < ERR_PRINT_COUNT_MAX) { err.err_code = UBWCP_SMMU_FAULT; if (cb_dev == ubwcp->dev_desc_cb) err.smmu_err.iommu_dev_id = UBWCP_DESC_CB_ID; else if (cb_dev == ubwcp->dev_buf_cb) err.smmu_err.iommu_dev_id = UBWCP_BUF_CB_ID; else err.smmu_err.iommu_dev_id = UBWCP_UNKNOWN_CB_ID; ERR("smmu fault error: iommu_dev_id:%d iova 0x%llx flags:0x%x", err.smmu_err.iommu_dev_id, iova, flags); err.smmu_err.dmabuf = get_dma_buf_from_iova(iova); err.smmu_err.iova = iova; err.smmu_err.iommu_fault_flags = flags; ubwcp_notify_error_handlers(&err); } err: return ret; } irqreturn_t ubwcp_irq_handler(int irq, void *ptr) { struct ubwcp_driver *ubwcp; void __iomem *base; u64 src; phys_addr_t addr; struct ubwcp_err_info err; error_print_count++; ubwcp = (struct ubwcp_driver *) ptr; base = ubwcp->base; if (irq == ubwcp->irq_range_ck_rd) { if (error_print_count < ERR_PRINT_COUNT_MAX) { src = ubwcp_hw_interrupt_src_address(base, 0); addr = src << 6; ERR("check range read error: src: 0x%llx", addr); err.err_code = UBWCP_RANGE_TRANSLATION_ERROR; err.translation_err.dmabuf = get_dma_buf_from_ulapa(addr); err.translation_err.ula_pa = addr; err.translation_err.read = true; ubwcp_notify_error_handlers(&err); } ubwcp_hw_interrupt_clear(ubwcp->base, 0); } else if (irq == ubwcp->irq_range_ck_wr) { if (error_print_count < ERR_PRINT_COUNT_MAX) { src = ubwcp_hw_interrupt_src_address(base, 1); addr = src << 6; ERR("check range write error: src: 0x%llx", addr); err.err_code = UBWCP_RANGE_TRANSLATION_ERROR; err.translation_err.dmabuf = get_dma_buf_from_ulapa(addr); err.translation_err.ula_pa = addr; err.translation_err.read = false; ubwcp_notify_error_handlers(&err); } ubwcp_hw_interrupt_clear(ubwcp->base, 1); } else if (irq == ubwcp->irq_encode) { if (error_print_count < ERR_PRINT_COUNT_MAX) { src = ubwcp_hw_interrupt_src_address(base, 3); addr = src << 6; ERR("encode error: src: 0x%llx", addr); err.err_code = UBWCP_ENCODE_ERROR; err.enc_err.dmabuf = get_dma_buf_from_ulapa(addr); err.enc_err.ula_pa = addr; ubwcp_notify_error_handlers(&err); } ubwcp_hw_interrupt_clear(ubwcp->base, 3); //TBD: encode is bit-3 instead of bit-2 } else if (irq == ubwcp->irq_decode) { if (error_print_count < ERR_PRINT_COUNT_MAX) { src = ubwcp_hw_interrupt_src_address(base, 2); addr = src << 6; ERR("decode error: src: 0x%llx", addr); err.err_code = UBWCP_DECODE_ERROR; err.dec_err.dmabuf = get_dma_buf_from_ulapa(addr); err.dec_err.ula_pa = addr; ubwcp_notify_error_handlers(&err); } ubwcp_hw_interrupt_clear(ubwcp->base, 2); //TBD: decode is bit-2 instead of bit-3 } else { ERR("unknown irq: %d", irq); return IRQ_NONE; } return IRQ_HANDLED; } static int ubwcp_interrupt_register(struct platform_device *pdev, struct ubwcp_driver *ubwcp) { int ret = 0; struct device *dev = &pdev->dev; FENTRY(); ubwcp->irq_range_ck_rd = platform_get_irq(pdev, 0); if (ubwcp->irq_range_ck_rd < 0) return ubwcp->irq_range_ck_rd; ubwcp->irq_range_ck_wr = platform_get_irq(pdev, 1); if (ubwcp->irq_range_ck_wr < 0) return ubwcp->irq_range_ck_wr; ubwcp->irq_encode = platform_get_irq(pdev, 2); if (ubwcp->irq_encode < 0) return ubwcp->irq_encode; ubwcp->irq_decode = platform_get_irq(pdev, 3); if (ubwcp->irq_decode < 0) return ubwcp->irq_decode; DBG("got irqs: %d %d %d %d", ubwcp->irq_range_ck_rd, ubwcp->irq_range_ck_wr, ubwcp->irq_encode, ubwcp->irq_decode); ret = devm_request_irq(dev, ubwcp->irq_range_ck_rd, ubwcp_irq_handler, 0, "ubwcp", ubwcp); if (ret) { ERR("request_irq() failed. irq: %d ret: %d", ubwcp->irq_range_ck_rd, ret); return ret; } ret = devm_request_irq(dev, ubwcp->irq_range_ck_wr, ubwcp_irq_handler, 0, "ubwcp", ubwcp); if (ret) { ERR("request_irq() failed. irq: %d ret: %d", ubwcp->irq_range_ck_wr, ret); return ret; } ret = devm_request_irq(dev, ubwcp->irq_encode, ubwcp_irq_handler, 0, "ubwcp", ubwcp); if (ret) { ERR("request_irq() failed. irq: %d ret: %d", ubwcp->irq_encode, ret); return ret; } ret = devm_request_irq(dev, ubwcp->irq_decode, ubwcp_irq_handler, 0, "ubwcp", ubwcp); if (ret) { ERR("request_irq() failed. irq: %d ret: %d", ubwcp->irq_decode, ret); return ret; } return ret; } /* ubwcp device probe */ static int qcom_ubwcp_probe(struct platform_device *pdev) { int ret = 0; struct ubwcp_driver *ubwcp; struct device *ubwcp_dev = &pdev->dev; FENTRY(); ubwcp = devm_kzalloc(ubwcp_dev, sizeof(*ubwcp), GFP_KERNEL); if (!ubwcp) { ERR("devm_kzalloc() failed"); return -ENOMEM; } ubwcp->dev = &pdev->dev; ret = dma_set_mask_and_coherent(ubwcp->dev, DMA_BIT_MASK(64)); #ifdef UBWCP_USE_SMC { struct resource res; of_address_to_resource(ubwcp_dev->of_node, 0, &res); ubwcp->base = (void __iomem *) res.start; DBG("Using SMC calls. base: %p", ubwcp->base); } #else ubwcp->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(ubwcp->base)) { ERR("devm ioremap() failed: %d", PTR_ERR(ubwcp->base)); return PTR_ERR(ubwcp->base); } DBG("ubwcp->base: %p", ubwcp->base); #endif ret = of_property_read_u64_index(ubwcp_dev->of_node, "ula_range", 0, &ubwcp->ula_pool_base); if (ret) { ERR("failed reading ula_range (base): %d", ret); return ret; } DBG("ubwcp: ula_range: base = 0x%lx", ubwcp->ula_pool_base); ret = of_property_read_u64_index(ubwcp_dev->of_node, "ula_range", 1, &ubwcp->ula_pool_size); if (ret) { ERR("failed reading ula_range (size): %d", ret); return ret; } DBG("ubwcp: ula_range: size = 0x%lx", ubwcp->ula_pool_size); INIT_LIST_HEAD(&ubwcp->err_handler_list); atomic_set(&ubwcp->num_non_lin_buffers, 0); ubwcp->mem_online = false; mutex_init(&ubwcp->desc_lock); spin_lock_init(&ubwcp->buf_table_lock); mutex_init(&ubwcp->mem_hotplug_lock); mutex_init(&ubwcp->ula_lock); mutex_init(&ubwcp->ubwcp_flush_lock); mutex_init(&ubwcp->hw_range_ck_lock); spin_lock_init(&ubwcp->err_handler_list_lock); if (ubwcp_interrupt_register(pdev, ubwcp)) return -1; /* Regulator */ ubwcp->vdd = devm_regulator_get(ubwcp_dev, "vdd"); if (IS_ERR_OR_NULL(ubwcp->vdd)) { ret = PTR_ERR(ubwcp->vdd); ERR("devm_regulator_get() failed: %d", ret); return -1; } ret = ubwcp_init_clocks(ubwcp, ubwcp_dev); if (ret) { ERR("failed to initialize ubwcp clocks err: %d", ret); return ret; } if (ubwcp_power(ubwcp, true)) return -1; if (ubwcp_cdev_init(ubwcp)) return -1; if (ubwcp_debugfs_init(ubwcp)) return -1; /* create ULA pool */ ubwcp->ula_pool = gen_pool_create(12, -1); if (!ubwcp->ula_pool) { ERR("failed gen_pool_create()"); ret = -1; goto err_pool_create; } ret = gen_pool_add(ubwcp->ula_pool, ubwcp->ula_pool_base, ubwcp->ula_pool_size, -1); if (ret) { ERR("failed gen_pool_add(): %d", ret); ret = -1; goto err_pool_add; } /* register the default config mmap function. */ ubwcp->mmap_config_fptr = msm_ubwcp_dma_buf_configure_mmap; hash_init(ubwcp->buf_table); ubwcp_buf_desc_list_init(ubwcp); image_format_init(ubwcp); /* one time hw init */ ubwcp_hw_one_time_init(ubwcp->base); ubwcp_hw_version(ubwcp->base, &ubwcp->hw_ver_major, &ubwcp->hw_ver_minor); pr_err("ubwcp: hw version: major %d, minor %d\n", ubwcp->hw_ver_major, ubwcp->hw_ver_minor); if (ubwcp->hw_ver_major == 0) { ERR("Failed to read HW version"); ret = -1; goto err_pool_add; } /* set pdev->dev->driver_data = ubwcp */ platform_set_drvdata(pdev, ubwcp); /* enable all 4 interrupts */ ubwcp_hw_interrupt_enable(ubwcp->base, INTERRUPT_READ_ERROR, true); ubwcp_hw_interrupt_enable(ubwcp->base, INTERRUPT_WRITE_ERROR, true); ubwcp_hw_interrupt_enable(ubwcp->base, INTERRUPT_ENCODE_ERROR, true); ubwcp_hw_interrupt_enable(ubwcp->base, INTERRUPT_DECODE_ERROR, true); /* Turn OFF until buffers are allocated */ if (ubwcp_power(ubwcp, false)) { ret = -1; goto err_power_off; } ret = msm_ubwcp_set_ops(ubwcp_init_buffer, ubwcp_free_buffer, ubwcp_lock, ubwcp_unlock); if (ret) { ERR("msm_ubwcp_set_ops() failed: %d, but IGNORED", ret); /* TBD: ignore return error during testing phase. * This allows us to rmmod/insmod for faster dev cycle. * In final version: return error and de-register driver if set_ops fails. */ ret = 0; //goto err_power_off; } else { DBG("msm_ubwcp_set_ops(): success"); } me = ubwcp; return ret; err_power_off: ubwcp_hw_interrupt_enable(ubwcp->base, INTERRUPT_READ_ERROR, false); ubwcp_hw_interrupt_enable(ubwcp->base, INTERRUPT_WRITE_ERROR, false); ubwcp_hw_interrupt_enable(ubwcp->base, INTERRUPT_ENCODE_ERROR, false); ubwcp_hw_interrupt_enable(ubwcp->base, INTERRUPT_DECODE_ERROR, false); err_pool_add: gen_pool_destroy(ubwcp->ula_pool); err_pool_create: ubwcp_cdev_deinit(ubwcp); return ret; } /* buffer context bank device probe */ static int ubwcp_probe_cb_buf(struct platform_device *pdev) { struct ubwcp_driver *ubwcp; struct iommu_domain *domain = NULL; FENTRY(); ubwcp = dev_get_drvdata(pdev->dev.parent); if (!ubwcp) { ERR("failed to get ubwcp ptr"); return -EINVAL; } /* save the buffer cb device */ ubwcp->dev_buf_cb = &pdev->dev; domain = iommu_get_domain_for_dev(ubwcp->dev_buf_cb); if (domain) iommu_set_fault_handler(domain, ubwcp_iommu_fault_handler, ubwcp->dev_buf_cb); return 0; } /* descriptor context bank device probe */ static int ubwcp_probe_cb_desc(struct platform_device *pdev) { int ret = 0; struct ubwcp_driver *ubwcp; struct iommu_domain *domain = NULL; FENTRY(); ubwcp = dev_get_drvdata(pdev->dev.parent); if (!ubwcp) { ERR("failed to get ubwcp ptr"); return -EINVAL; } ubwcp->buffer_desc_size = UBWCP_BUFFER_DESC_OFFSET * UBWCP_BUFFER_DESC_COUNT; ubwcp->dev_desc_cb = &pdev->dev; dma_set_max_seg_size(ubwcp->dev_desc_cb, DMA_BIT_MASK(32)); dma_set_seg_boundary(ubwcp->dev_desc_cb, (unsigned long)DMA_BIT_MASK(64)); /* Allocate buffer descriptors. UBWCP is iocoherent device. * Thus we don't need to flush after updates to buffer descriptors. */ ubwcp->buffer_desc_base = dma_alloc_coherent(ubwcp->dev_desc_cb, ubwcp->buffer_desc_size, &ubwcp->buffer_desc_dma_handle, GFP_KERNEL); if (!ubwcp->buffer_desc_base) { ERR("failed to allocate desc buffer"); return -ENOMEM; } DBG("desc_base = %p size = %zu", ubwcp->buffer_desc_base, ubwcp->buffer_desc_size); ret = ubwcp_power(ubwcp, true); if (ret) { ERR("failed to power on"); goto err; } ubwcp_hw_set_buf_desc(ubwcp->base, (u64) ubwcp->buffer_desc_dma_handle, UBWCP_BUFFER_DESC_OFFSET); ret = ubwcp_power(ubwcp, false); if (ret) { ERR("failed to power off"); goto err; } domain = iommu_get_domain_for_dev(ubwcp->dev_desc_cb); if (domain) iommu_set_fault_handler(domain, ubwcp_iommu_fault_handler, ubwcp->dev_desc_cb); return ret; err: dma_free_coherent(ubwcp->dev_desc_cb, ubwcp->buffer_desc_size, ubwcp->buffer_desc_base, ubwcp->buffer_desc_dma_handle); ubwcp->buffer_desc_base = NULL; ubwcp->buffer_desc_dma_handle = 0; ubwcp->dev_desc_cb = NULL; return -1; } /* buffer context bank device remove */ static int ubwcp_remove_cb_buf(struct platform_device *pdev) { struct ubwcp_driver *ubwcp; FENTRY(); ubwcp = dev_get_drvdata(pdev->dev.parent); if (!ubwcp) { ERR("failed to get ubwcp ptr"); return -EINVAL; } /* remove buf_cb reference */ ubwcp->dev_buf_cb = NULL; return 0; } /* descriptor context bank device remove */ static int ubwcp_remove_cb_desc(struct platform_device *pdev) { struct ubwcp_driver *ubwcp; FENTRY(); ubwcp = dev_get_drvdata(pdev->dev.parent); if (!ubwcp) { ERR("failed to get ubwcp ptr"); return -EINVAL; } if (!ubwcp->dev_desc_cb) { ERR("ubwcp->dev_desc_cb == NULL"); return -1; } ubwcp_power(ubwcp, true); ubwcp_hw_set_buf_desc(ubwcp->base, 0x0, 0x0); ubwcp_power(ubwcp, false); dma_free_coherent(ubwcp->dev_desc_cb, ubwcp->buffer_desc_size, ubwcp->buffer_desc_base, ubwcp->buffer_desc_dma_handle); ubwcp->buffer_desc_base = NULL; ubwcp->buffer_desc_dma_handle = 0; return 0; } /* ubwcp device remove */ static int qcom_ubwcp_remove(struct platform_device *pdev) { size_t avail; size_t psize; struct ubwcp_driver *ubwcp; FENTRY(); /* get pdev->dev->driver_data = ubwcp */ ubwcp = platform_get_drvdata(pdev); if (!ubwcp) { ERR("ubwcp == NULL"); return -1; } ubwcp_power(ubwcp, true); ubwcp_hw_interrupt_enable(ubwcp->base, INTERRUPT_READ_ERROR, false); ubwcp_hw_interrupt_enable(ubwcp->base, INTERRUPT_WRITE_ERROR, false); ubwcp_hw_interrupt_enable(ubwcp->base, INTERRUPT_ENCODE_ERROR, false); ubwcp_hw_interrupt_enable(ubwcp->base, INTERRUPT_DECODE_ERROR, false); ubwcp_power(ubwcp, false); /* before destroying, make sure pool is empty. otherwise pool_destroy() panics. * TBD: remove this check for production code and let it panic */ avail = gen_pool_avail(ubwcp->ula_pool); psize = gen_pool_size(ubwcp->ula_pool); if (psize != avail) { ERR("gen_pool is not empty! avail: %zx size: %zx", avail, psize); ERR("skipping pool destroy....cause it will PANIC. Fix this!!!!"); WARN(1, "Fix this!"); } else { gen_pool_destroy(ubwcp->ula_pool); } ubwcp_debugfs_deinit(ubwcp); ubwcp_cdev_deinit(ubwcp); return 0; } /* top level ubwcp device probe function */ static int ubwcp_probe(struct platform_device *pdev) { const char *compatible = ""; FENTRY(); trace_ubwcp_probe(pdev); if (of_device_is_compatible(pdev->dev.of_node, "qcom,ubwcp")) return qcom_ubwcp_probe(pdev); else if (of_device_is_compatible(pdev->dev.of_node, "qcom,ubwcp-context-bank-desc")) return ubwcp_probe_cb_desc(pdev); else if (of_device_is_compatible(pdev->dev.of_node, "qcom,ubwcp-context-bank-buf")) return ubwcp_probe_cb_buf(pdev); of_property_read_string(pdev->dev.of_node, "compatible", &compatible); ERR("unknown device: %s", compatible); WARN_ON(1); return -EINVAL; } /* top level ubwcp device remove function */ static int ubwcp_remove(struct platform_device *pdev) { const char *compatible = ""; FENTRY(); trace_ubwcp_remove(pdev); /* TBD: what if buffers are still allocated? locked? etc. * also should turn off power? */ if (of_device_is_compatible(pdev->dev.of_node, "qcom,ubwcp")) return qcom_ubwcp_remove(pdev); else if (of_device_is_compatible(pdev->dev.of_node, "qcom,ubwcp-context-bank-desc")) return ubwcp_remove_cb_desc(pdev); else if (of_device_is_compatible(pdev->dev.of_node, "qcom,ubwcp-context-bank-buf")) return ubwcp_remove_cb_buf(pdev); of_property_read_string(pdev->dev.of_node, "compatible", &compatible); ERR("unknown device: %s", compatible); WARN_ON(1); return -EINVAL; } static const struct of_device_id ubwcp_dt_match[] = { {.compatible = "qcom,ubwcp"}, {.compatible = "qcom,ubwcp-context-bank-desc"}, {.compatible = "qcom,ubwcp-context-bank-buf"}, {} }; struct platform_driver ubwcp_platform_driver = { .probe = ubwcp_probe, .remove = ubwcp_remove, .driver = { .name = "qcom,ubwcp", .of_match_table = ubwcp_dt_match, }, }; int ubwcp_init(void) { int ret = 0; DBG("+++++++++++"); ret = platform_driver_register(&ubwcp_platform_driver); if (ret) ERR("platform_driver_register() failed: %d", ret); return ret; } void ubwcp_exit(void) { platform_driver_unregister(&ubwcp_platform_driver); DBG("-----------"); } module_init(ubwcp_init); module_exit(ubwcp_exit); MODULE_LICENSE("GPL");