Linaro-mm-sig April 2023

linaro-mm-sig@lists.linaro.org

35 participants
24 discussions

[RFC PATCH] dma-buf/dma-fence: Use a successful read_trylock() annotation for dma_fence_begin_signalling()

by Thomas Hellström

Condsider the following call sequence: /* Upper layer */ dma_fence_begin_signalling(); lock(tainted_shared_lock); /* Driver callback */ dma_fence_begin_signalling(); ... The driver might here use a utility that is annotated as intended for the dma-fence signalling critical path. Now if the upper layer isn't correctly annotated yet for whatever reason, resulting in /* Upper layer */ lock(tainted_shared_lock); /* Driver callback */ dma_fence_begin_signalling(); We will receive a false lockdep locking order violation notification from dma_fence_begin_signalling(). However entering a dma-fence signalling critical section itself doesn't block and could not cause a deadlock. So use a successful read_trylock() annotation instead for dma_fence_begin_signalling(). That will make sure that the locking order is correctly registered in the first case, and doesn't register any locking order in the second case. The alternative is of course to make sure that the "Upper layer" is always correctly annotated. But experience shows that's not easily achievable in all cases. Signed-off-by: Thomas Hellström <thomas.hellstrom(a)linux.intel.com> --- drivers/dma-buf/dma-fence.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c index f177c56269bb..17f632768ef9 100644 --- a/drivers/dma-buf/dma-fence.c +++ b/drivers/dma-buf/dma-fence.c @@ -308,8 +308,8 @@ bool dma_fence_begin_signalling(void) if (in_atomic()) return true; - /* ... and non-recursive readlock */ - lock_acquire(&dma_fence_lockdep_map, 0, 0, 1, 1, NULL, _RET_IP_); + /* ... and non-recursive successful read_trylock */ + lock_acquire(&dma_fence_lockdep_map, 0, 1, 1, 1, NULL, _RET_IP_); return false; } @@ -340,7 +340,7 @@ void __dma_fence_might_wait(void) lock_map_acquire(&dma_fence_lockdep_map); lock_map_release(&dma_fence_lockdep_map); if (tmp) - lock_acquire(&dma_fence_lockdep_map, 0, 0, 1, 1, NULL, _THIS_IP_); + lock_acquire(&dma_fence_lockdep_map, 0, 1, 1, 1, NULL, _THIS_IP_); } #endif -- 2.39.2

3 months, 1 week

[PATCH] drm/shmem-helper: Remove duplicate include

by Jiapeng Chong

./drivers/gpu/drm/drm_gem_shmem_helper.c: linux/module.h is included more than once. Reported-by: Abaci Robot <abaci(a)linux.alibaba.com> Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4567 Signed-off-by: Jiapeng Chong <jiapeng.chong(a)linux.alibaba.com> --- drivers/gpu/drm/drm_gem_shmem_helper.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index 4ea6507a77e5..f401df26facf 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -10,7 +10,6 @@ #include <linux/shmem_fs.h> #include <linux/slab.h> #include <linux/vmalloc.h> -#include <linux/module.h> #ifdef CONFIG_X86 #include <asm/set_memory.h> -- 2.20.1.7.g153144c

9 months, 3 weeks

[RFC] drm/scheduler: Unwrap job dependencies

by Rob Clark

From: Rob Clark <robdclark(a)chromium.org> Container fences have burner contexts, which makes the trick to store at most one fence per context somewhat useless if we don't unwrap array or chain fences. Signed-off-by: Rob Clark <robdclark(a)chromium.org> --- tbh, I'm not sure why we weren't doing this already, unless there is something I'm overlooking drivers/gpu/drm/scheduler/sched_main.c | 43 +++++++++++++++++--------- 1 file changed, 28 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c index c2ee44d6224b..f59e5335afbb 100644 --- a/drivers/gpu/drm/scheduler/sched_main.c +++ b/drivers/gpu/drm/scheduler/sched_main.c @@ -41,20 +41,21 @@ * 4. Entities themselves maintain a queue of jobs that will be scheduled on * the hardware. * * The jobs in a entity are always scheduled in the order that they were pushed. */ #include <linux/kthread.h> #include <linux/wait.h> #include <linux/sched.h> #include <linux/completion.h> +#include <linux/dma-fence-unwrap.h> #include <linux/dma-resv.h> #include <uapi/linux/sched/types.h> #include <drm/drm_print.h> #include <drm/drm_gem.h> #include <drm/gpu_scheduler.h> #include <drm/spsc_queue.h> #define CREATE_TRACE_POINTS #include "gpu_scheduler_trace.h" @@ -665,41 +666,27 @@ void drm_sched_job_arm(struct drm_sched_job *job) sched = entity->rq->sched; job->sched = sched; job->s_priority = entity->rq - sched->sched_rq; job->id = atomic64_inc_return(&sched->job_id_count); drm_sched_fence_init(job->s_fence, job->entity); } EXPORT_SYMBOL(drm_sched_job_arm); -/** - * drm_sched_job_add_dependency - adds the fence as a job dependency - * @job: scheduler job to add the dependencies to - * @fence: the dma_fence to add to the list of dependencies. - * - * Note that @fence is consumed in both the success and error cases. - * - * Returns: - * 0 on success, or an error on failing to expand the array. - */ -int drm_sched_job_add_dependency(struct drm_sched_job *job, - struct dma_fence *fence) +static int _add_dependency(struct drm_sched_job *job, struct dma_fence *fence) { struct dma_fence *entry; unsigned long index; u32 id = 0; int ret; - if (!fence) - return 0; - /* Deduplicate if we already depend on a fence from the same context. * This lets the size of the array of deps scale with the number of * engines involved, rather than the number of BOs. */ xa_for_each(&job->dependencies, index, entry) { if (entry->context != fence->context) continue; if (dma_fence_is_later(fence, entry)) { dma_fence_put(entry); @@ -709,20 +696,46 @@ int drm_sched_job_add_dependency(struct drm_sched_job *job, } return 0; } ret = xa_alloc(&job->dependencies, &id, fence, xa_limit_32b, GFP_KERNEL); if (ret != 0) dma_fence_put(fence); return ret; } + +/** + * drm_sched_job_add_dependency - adds the fence as a job dependency + * @job: scheduler job to add the dependencies to + * @fence: the dma_fence to add to the list of dependencies. + * + * Note that @fence is consumed in both the success and error cases. + * + * Returns: + * 0 on success, or an error on failing to expand the array. + */ +int drm_sched_job_add_dependency(struct drm_sched_job *job, + struct dma_fence *fence) +{ + struct dma_fence_unwrap iter; + struct dma_fence *f; + int ret = 0; + + dma_fence_unwrap_for_each (f, &iter, fence) { + ret = _add_dependency(job, f); + if (ret) + break; + } + + return ret; +} EXPORT_SYMBOL(drm_sched_job_add_dependency); /** * drm_sched_job_add_resv_dependencies - add all fences from the resv to the job * @job: scheduler job to add the dependencies to * @resv: the dma_resv object to get the fences from * @usage: the dma_resv_usage to use to filter the fences * * This adds all fences matching the given usage from @resv to @job. * Must be called with the @resv lock held. -- 2.39.2

1 year

[PATCH v3 00/11] iio: new DMABUF based API, v3

by Paul Cercueil

Hi Jonathan, Here's the v3 of my patchset that introduces a new interface based on DMABUF objects to complement the fileio API, and adds write() support to the existing fileio API. It changed quite a lot since V2; the IIO subsystem is now just a DMABUF importer, and all the complexity related to handling creation, deletion and export of DMABUFs (including DMA mapping etc.) is gone. This new interface will be used by Libiio. The code is ready[1] and will be merged to the main branch as soon as the kernel bits are accepted upstream. Note that Libiio (and its server counterpart, iiod) use this new interface in two different ways: - by memory-mapping the DMABUFs to access the sample data directly, which is much faster than using the existing fileio API as the sample data does not need to be copied; - by passing the DMABUFs around directly to the USB stack, in a device-to-device zero-copy fashion, using a new DMABUF interface for the USB (FunctionFS to be exact) stack, which is being upstreamed in parallel of this patchset [2]. As for write() support, Nuno (Cc'd) said he will work on upstreaming the DAC counterpart of adc/adi-axi-adc.c in the next few weeks, so there will be a user for the buffer write() support. I hope you are okay with this - otherwise, we can just wait until this work is done, and I still benefit from sending this patchset early to get feedback. Finally, the dmaengine implementation for this new interface requires a new dmaengine API function, since dmaengine_prep_slave_sg() will always transfer the full scatterlist unconditionally, while we want to be able to transfer an arbitrary amount of bytes from/to the DMABUF. Since scatterlists seem to be going away soon, the new API function will take an array of DMA addresses + lengths. I am open to suggestions if anybody (especially Vinod) have a better design in mind. Cheers, -Paul [1]: https://github.com/analogdevicesinc/libiio/pull/928 [2]: https://lore.kernel.org/linux-usb/425c1b8ea20002c6344a574cd094b4c715c67ba6.… --- Changelog: * Patches 01-02 are new; * Patches [03/11], [05/11] didn't change; * Patch [04/11]: - Reorganize arguments to iio_dma_buffer_io() - Change 'is_write' argument to 'is_from_user' - Change (__force char *) to (__force __user char *), in iio_dma_buffer_write(), since we only want to drop the "const". * Patch [07/11]: - Get rid of the old IOCTLs. The IIO subsystem does not create or manage DMABUFs anymore, and only attaches/detaches externally created DMABUFs. - Add IIO_BUFFER_DMABUF_CYCLIC to the supported flags. * Patch [09/11]: Update code to provide the functions that will be used as callbacks for the new IOCTLs. * Patch [10/11]: Use the new dmaengine_prep_slave_dma_array(), and adapt the code to work with the new functions introduced in industrialio-buffer-dma.c. * Patch [11/11]: Update the documentation to reflect the new API. --- Alexandru Ardelean (1): iio: buffer-dma: split iio_dma_buffer_fileio_free() function Paul Cercueil (10): dmaengine: Add API function dmaengine_prep_slave_dma_array() dmaengine: dma-axi-dmac: Implement device_prep_slave_dma_array iio: buffer-dma: Get rid of outgoing queue iio: buffer-dma: Enable buffer write support iio: buffer-dmaengine: Support specifying buffer direction iio: buffer-dmaengine: Enable write support iio: core: Add new DMABUF interface infrastructure iio: buffer-dma: Enable support for DMABUFs iio: buffer-dmaengine: Support new DMABUF based userspace API Documentation: iio: Document high-speed DMABUF based API Documentation/iio/dmabuf_api.rst | 59 +++ Documentation/iio/index.rst | 2 + drivers/dma/dma-axi-dmac.c | 41 ++ drivers/iio/adc/adi-axi-adc.c | 3 +- drivers/iio/buffer/industrialio-buffer-dma.c | 331 +++++++++++--- .../buffer/industrialio-buffer-dmaengine.c | 77 +++- drivers/iio/industrialio-buffer.c | 402 ++++++++++++++++++ include/linux/dmaengine.h | 16 + include/linux/iio/buffer-dma.h | 40 +- include/linux/iio/buffer-dmaengine.h | 5 +- include/linux/iio/buffer_impl.h | 22 + include/uapi/linux/iio/buffer.h | 22 + 12 files changed, 939 insertions(+), 81 deletions(-) create mode 100644 Documentation/iio/dmabuf_api.rst -- 2.39.2

1 year, 8 months

[PATCH v2] mtd: rawnand: macronix: OTP access for MX30LFxG18AC

by Arseniy Krasnov

This adds support for OTP area access on MX30LFxG18AC chip series. Changelog: v1 -> v2: * Add slab.h include due to kernel test robot error. Signed-off-by: Arseniy Krasnov <AVKrasnov(a)sberdevices.ru> --- drivers/mtd/nand/raw/nand_macronix.c | 213 +++++++++++++++++++++++++++ 1 file changed, 213 insertions(+) diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c index 1472f925f386..5232cf48c350 100644 --- a/drivers/mtd/nand/raw/nand_macronix.c +++ b/drivers/mtd/nand/raw/nand_macronix.c @@ -6,6 +6,7 @@ * Author: Boris Brezillon <boris.brezillon(a)free-electrons.com> */ +#include <linux/slab.h> #include "linux/delay.h" #include "internals.h" @@ -31,6 +32,20 @@ #define MXIC_CMD_POWER_DOWN 0xB9 +#define ONFI_FEATURE_ADDR_30LFXG18AC_OTP 0x90 +#define MACRONIX_30LFXG18AC_OTP_START_PAGE 0 +#define MACRONIX_30LFXG18AC_OTP_PAGES 30 +#define MACRONIX_30LFXG18AC_OTP_PAGE_SIZE 2112 +#define MACRONIX_30LFXG18AC_OTP_START_BYTE \ + (MACRONIX_30LFXG18AC_OTP_START_PAGE * \ + MACRONIX_30LFXG18AC_OTP_PAGE_SIZE) +#define MACRONIX_30LFXG18AC_OTP_SIZE_BYTES \ + (MACRONIX_30LFXG18AC_OTP_PAGES * \ + MACRONIX_30LFXG18AC_OTP_PAGE_SIZE) + +#define MACRONIX_30LFXG18AC_OTP_EN BIT(0) +#define MACRONIX_30LFXG18AC_OTP_LOCKED BIT(1) + struct nand_onfi_vendor_macronix { u8 reserved; u8 reliability_func; @@ -316,6 +331,203 @@ static void macronix_nand_deep_power_down_support(struct nand_chip *chip) chip->ops.resume = mxic_nand_resume; } +static int macronix_30lfxg18ac_get_otp_info(struct mtd_info *mtd, size_t len, + size_t *retlen, + struct otp_info *buf) +{ + if (len < sizeof(*buf)) + return -EINVAL; + + /* Don't know how to check that OTP is locked. */ + buf->locked = 0; + buf->start = MACRONIX_30LFXG18AC_OTP_START_BYTE; + buf->length = MACRONIX_30LFXG18AC_OTP_SIZE_BYTES; + + *retlen = sizeof(*buf); + + return 0; +} + +static int macronix_30lfxg18ac_otp_enable(struct nand_chip *nand) +{ + uint8_t feature_buf[ONFI_SUBFEATURE_PARAM_LEN] = { 0 }; + + feature_buf[0] = MACRONIX_30LFXG18AC_OTP_EN; + return nand_set_features(nand, ONFI_FEATURE_ADDR_30LFXG18AC_OTP, + feature_buf); +} + +static int macronix_30lfxg18ac_otp_disable(struct nand_chip *nand) +{ + uint8_t feature_buf[ONFI_SUBFEATURE_PARAM_LEN] = { 0 }; + + return nand_set_features(nand, ONFI_FEATURE_ADDR_30LFXG18AC_OTP, + feature_buf); +} + +static int __macronix_30lfxg18ac_rw_otp(struct mtd_info *mtd, + loff_t offs_in_flash, + size_t len, size_t *retlen, + u_char *buf, bool write) +{ + struct nand_chip *nand; + size_t bytes_handled; + unsigned long page; + off_t offs_in_page; + void *dma_buf; + int ret; + + /* 'nand_prog/read_page_op()' may use 'buf' as DMA buffer, + * so allocate properly aligned memory for it. This is + * needed because cross page accesses may lead to unaligned + * buffer address for DMA. + */ + dma_buf = kmalloc(MACRONIX_30LFXG18AC_OTP_PAGE_SIZE, GFP_KERNEL); + if (!dma_buf) + return -ENOMEM; + + nand = mtd_to_nand(mtd); + nand_select_target(nand, 0); + + ret = macronix_30lfxg18ac_otp_enable(nand); + if (ret) + goto out_otp; + + page = offs_in_flash; + /* 'page' will be result of division. */ + offs_in_page = do_div(page, MACRONIX_30LFXG18AC_OTP_PAGE_SIZE); + bytes_handled = 0; + + while (bytes_handled < len && + page < MACRONIX_30LFXG18AC_OTP_PAGES) { + size_t bytes_to_handle; + + bytes_to_handle = min_t(size_t, len - bytes_handled, + MACRONIX_30LFXG18AC_OTP_PAGE_SIZE - + offs_in_page); + + if (write) { + memcpy(dma_buf, &buf[bytes_handled], bytes_to_handle); + ret = nand_prog_page_op(nand, page, offs_in_page, + dma_buf, bytes_to_handle); + } else { + ret = nand_read_page_op(nand, page, offs_in_page, + dma_buf, bytes_to_handle); + if (!ret) + memcpy(&buf[bytes_handled], dma_buf, + bytes_to_handle); + } + if (ret) + goto out_otp; + + bytes_handled += bytes_to_handle; + offs_in_page = 0; + page++; + } + + *retlen = bytes_handled; + +out_otp: + if (ret) + dev_err(&mtd->dev, "failed to perform OTP IO: %i\n", ret); + + ret = macronix_30lfxg18ac_otp_disable(nand); + WARN(ret, "failed to leave OTP mode after %s\n", + write ? "write" : "read"); + nand_deselect_target(nand); + kfree(dma_buf); + + return ret; +} + +static int macronix_30lfxg18ac_write_otp(struct mtd_info *mtd, loff_t to, + size_t len, size_t *rlen, + const u_char *buf) +{ + return __macronix_30lfxg18ac_rw_otp(mtd, to, len, rlen, (u_char *)buf, + true); +} + +static int macronix_30lfxg18ac_read_otp(struct mtd_info *mtd, loff_t from, + size_t len, size_t *rlen, + u_char *buf) +{ + return __macronix_30lfxg18ac_rw_otp(mtd, from, len, rlen, buf, false); +} + +static int macronix_30lfxg18ac_lock_otp(struct mtd_info *mtd, loff_t from, + size_t len) +{ + uint8_t feature_buf[ONFI_SUBFEATURE_PARAM_LEN] = { 0 }; + struct nand_chip *nand; + int ret; + + if (from != MACRONIX_30LFXG18AC_OTP_START_BYTE || + len != MACRONIX_30LFXG18AC_OTP_SIZE_BYTES) + return -EINVAL; + + dev_dbg(&mtd->dev, "locking OTP\n"); + + nand = mtd_to_nand(mtd); + nand_select_target(nand, 0); + + feature_buf[0] = MACRONIX_30LFXG18AC_OTP_EN | + MACRONIX_30LFXG18AC_OTP_LOCKED; + ret = nand_set_features(nand, ONFI_FEATURE_ADDR_30LFXG18AC_OTP, + feature_buf); + if (ret) { + dev_err(&mtd->dev, + "failed to lock OTP (set features): %i\n", ret); + nand_deselect_target(nand); + return ret; + } + + /* Do dummy page prog with zero address. */ + feature_buf[0] = 0; + ret = nand_prog_page_op(nand, 0, 0, feature_buf, 1); + if (ret) + dev_err(&mtd->dev, + "failed to lock OTP (page prog): %i\n", ret); + + ret = macronix_30lfxg18ac_otp_disable(nand); + WARN(ret, "failed to leave OTP mode after lock\n"); + + nand_deselect_target(nand); + + return ret; +} + +static void macronix_nand_setup_otp(struct nand_chip *chip) +{ + static const char * const supported_otp_models[] = { + "MX30LF1G18AC", + "MX30LF2G18AC", + "MX30LF4G18AC", + }; + struct mtd_info *mtd; + + if (!chip->parameters.supports_set_get_features) + return; + + if (match_string(supported_otp_models, + ARRAY_SIZE(supported_otp_models), + chip->parameters.model) < 0) + return; + + bitmap_set(chip->parameters.get_feature_list, + ONFI_FEATURE_ADDR_30LFXG18AC_OTP, 1); + bitmap_set(chip->parameters.set_feature_list, + ONFI_FEATURE_ADDR_30LFXG18AC_OTP, 1); + + mtd = nand_to_mtd(chip); + mtd->_get_fact_prot_info = macronix_30lfxg18ac_get_otp_info; + mtd->_read_fact_prot_reg = macronix_30lfxg18ac_read_otp; + mtd->_get_user_prot_info = macronix_30lfxg18ac_get_otp_info; + mtd->_read_user_prot_reg = macronix_30lfxg18ac_read_otp; + mtd->_write_user_prot_reg = macronix_30lfxg18ac_write_otp; + mtd->_lock_user_prot_reg = macronix_30lfxg18ac_lock_otp; +} + static int macronix_nand_init(struct nand_chip *chip) { if (nand_is_slc(chip)) @@ -325,6 +537,7 @@ static int macronix_nand_init(struct nand_chip *chip) macronix_nand_onfi_init(chip); macronix_nand_block_protection_support(chip); macronix_nand_deep_power_down_support(chip); + macronix_nand_setup_otp(chip); return 0; } -- 2.35.0

1 year, 8 months

[PATCH v3 2/2] drm/amdgpu: Fix integer overflow in amdgpu_cs_pass1

by hackyzh002

The type of size is unsigned int, if size is 0x40000000, there will be an integer overflow, size will be zero after size *= sizeof(uint32_t), will cause uninitialized memory to be referenced later. Signed-off-by: hackyzh002 <hackyzh002(a)gmail.com> --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index 08eced097..89bcacc65 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -192,7 +192,7 @@ static int amdgpu_cs_pass1(struct amdgpu_cs_parser *p, uint64_t *chunk_array_user; uint64_t *chunk_array; uint32_t uf_offset = 0; - unsigned int size; + size_t size; int ret; int i; -- 2.34.1

1 year, 8 months

[PATCH V3 1/2] drm/radeon: Fix integer overflow in radeon_cs_parser_init

by hackyzh002

The type of size is unsigned, if size is 0x40000000, there will be an integer overflow, size will be zero after size *= sizeof(uint32_t), will cause uninitialized memory to be referenced later Signed-off-by: hackyzh002 <hackyzh002(a)gmail.com> --- drivers/gpu/drm/radeon/radeon_cs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c index 46a27ebf4..a6700d727 100644 --- a/drivers/gpu/drm/radeon/radeon_cs.c +++ b/drivers/gpu/drm/radeon/radeon_cs.c @@ -270,7 +270,8 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data) { struct drm_radeon_cs *cs = data; uint64_t *chunk_array_ptr; - unsigned size, i; + u64 size; + unsigned i; u32 ring = RADEON_CS_RING_GFX; s32 priority = 0; -- 2.34.1

1 year, 8 months

[PATCH v1] mtd: rawnand: macronix: OTP access for MX30LFxG18AC

by Arseniy Krasnov

This adds support for OTP area access on MX30LFxG18AC chip series. Signed-off-by: Arseniy Krasnov <AVKrasnov(a)sberdevices.ru> --- drivers/mtd/nand/raw/nand_macronix.c | 212 +++++++++++++++++++++++++++ 1 file changed, 212 insertions(+) diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c index 1472f925f386..c0d12979933a 100644 --- a/drivers/mtd/nand/raw/nand_macronix.c +++ b/drivers/mtd/nand/raw/nand_macronix.c @@ -31,6 +31,20 @@ #define MXIC_CMD_POWER_DOWN 0xB9 +#define ONFI_FEATURE_ADDR_30LFXG18AC_OTP 0x90 +#define MACRONIX_30LFXG18AC_OTP_START_PAGE 0 +#define MACRONIX_30LFXG18AC_OTP_PAGES 30 +#define MACRONIX_30LFXG18AC_OTP_PAGE_SIZE 2112 +#define MACRONIX_30LFXG18AC_OTP_START_BYTE \ + (MACRONIX_30LFXG18AC_OTP_START_PAGE * \ + MACRONIX_30LFXG18AC_OTP_PAGE_SIZE) +#define MACRONIX_30LFXG18AC_OTP_SIZE_BYTES \ + (MACRONIX_30LFXG18AC_OTP_PAGES * \ + MACRONIX_30LFXG18AC_OTP_PAGE_SIZE) + +#define MACRONIX_30LFXG18AC_OTP_EN BIT(0) +#define MACRONIX_30LFXG18AC_OTP_LOCKED BIT(1) + struct nand_onfi_vendor_macronix { u8 reserved; u8 reliability_func; @@ -316,6 +330,203 @@ static void macronix_nand_deep_power_down_support(struct nand_chip *chip) chip->ops.resume = mxic_nand_resume; } +static int macronix_30lfxg18ac_get_otp_info(struct mtd_info *mtd, size_t len, + size_t *retlen, + struct otp_info *buf) +{ + if (len < sizeof(*buf)) + return -EINVAL; + + /* Don't know how to check that OTP is locked. */ + buf->locked = 0; + buf->start = MACRONIX_30LFXG18AC_OTP_START_BYTE; + buf->length = MACRONIX_30LFXG18AC_OTP_SIZE_BYTES; + + *retlen = sizeof(*buf); + + return 0; +} + +static int macronix_30lfxg18ac_otp_enable(struct nand_chip *nand) +{ + uint8_t feature_buf[ONFI_SUBFEATURE_PARAM_LEN] = { 0 }; + + feature_buf[0] = MACRONIX_30LFXG18AC_OTP_EN; + return nand_set_features(nand, ONFI_FEATURE_ADDR_30LFXG18AC_OTP, + feature_buf); +} + +static int macronix_30lfxg18ac_otp_disable(struct nand_chip *nand) +{ + uint8_t feature_buf[ONFI_SUBFEATURE_PARAM_LEN] = { 0 }; + + return nand_set_features(nand, ONFI_FEATURE_ADDR_30LFXG18AC_OTP, + feature_buf); +} + +static int __macronix_30lfxg18ac_rw_otp(struct mtd_info *mtd, + loff_t offs_in_flash, + size_t len, size_t *retlen, + u_char *buf, bool write) +{ + struct nand_chip *nand; + size_t bytes_handled; + unsigned long page; + off_t offs_in_page; + void *dma_buf; + int ret; + + /* 'nand_prog/read_page_op()' may use 'buf' as DMA buffer, + * so allocate properly aligned memory for it. This is + * needed because cross page accesses may lead to unaligned + * buffer address for DMA. + */ + dma_buf = kmalloc(MACRONIX_30LFXG18AC_OTP_PAGE_SIZE, GFP_KERNEL); + if (!dma_buf) + return -ENOMEM; + + nand = mtd_to_nand(mtd); + nand_select_target(nand, 0); + + ret = macronix_30lfxg18ac_otp_enable(nand); + if (ret) + goto out_otp; + + page = offs_in_flash; + /* 'page' will be result of division. */ + offs_in_page = do_div(page, MACRONIX_30LFXG18AC_OTP_PAGE_SIZE); + bytes_handled = 0; + + while (bytes_handled < len && + page < MACRONIX_30LFXG18AC_OTP_PAGES) { + size_t bytes_to_handle; + + bytes_to_handle = min_t(size_t, len - bytes_handled, + MACRONIX_30LFXG18AC_OTP_PAGE_SIZE - + offs_in_page); + + if (write) { + memcpy(dma_buf, &buf[bytes_handled], bytes_to_handle); + ret = nand_prog_page_op(nand, page, offs_in_page, + dma_buf, bytes_to_handle); + } else { + ret = nand_read_page_op(nand, page, offs_in_page, + dma_buf, bytes_to_handle); + if (!ret) + memcpy(&buf[bytes_handled], dma_buf, + bytes_to_handle); + } + if (ret) + goto out_otp; + + bytes_handled += bytes_to_handle; + offs_in_page = 0; + page++; + } + + *retlen = bytes_handled; + +out_otp: + if (ret) + dev_err(&mtd->dev, "failed to perform OTP IO: %i\n", ret); + + ret = macronix_30lfxg18ac_otp_disable(nand); + WARN(ret, "failed to leave OTP mode after %s\n", + write ? "write" : "read"); + nand_deselect_target(nand); + kfree(dma_buf); + + return ret; +} + +static int macronix_30lfxg18ac_write_otp(struct mtd_info *mtd, loff_t to, + size_t len, size_t *rlen, + const u_char *buf) +{ + return __macronix_30lfxg18ac_rw_otp(mtd, to, len, rlen, (u_char *)buf, + true); +} + +static int macronix_30lfxg18ac_read_otp(struct mtd_info *mtd, loff_t from, + size_t len, size_t *rlen, + u_char *buf) +{ + return __macronix_30lfxg18ac_rw_otp(mtd, from, len, rlen, buf, false); +} + +static int macronix_30lfxg18ac_lock_otp(struct mtd_info *mtd, loff_t from, + size_t len) +{ + uint8_t feature_buf[ONFI_SUBFEATURE_PARAM_LEN] = { 0 }; + struct nand_chip *nand; + int ret; + + if (from != MACRONIX_30LFXG18AC_OTP_START_BYTE || + len != MACRONIX_30LFXG18AC_OTP_SIZE_BYTES) + return -EINVAL; + + dev_dbg(&mtd->dev, "locking OTP\n"); + + nand = mtd_to_nand(mtd); + nand_select_target(nand, 0); + + feature_buf[0] = MACRONIX_30LFXG18AC_OTP_EN | + MACRONIX_30LFXG18AC_OTP_LOCKED; + ret = nand_set_features(nand, ONFI_FEATURE_ADDR_30LFXG18AC_OTP, + feature_buf); + if (ret) { + dev_err(&mtd->dev, + "failed to lock OTP (set features): %i\n", ret); + nand_deselect_target(nand); + return ret; + } + + /* Do dummy page prog with zero address. */ + feature_buf[0] = 0; + ret = nand_prog_page_op(nand, 0, 0, feature_buf, 1); + if (ret) + dev_err(&mtd->dev, + "failed to lock OTP (page prog): %i\n", ret); + + ret = macronix_30lfxg18ac_otp_disable(nand); + WARN(ret, "failed to leave OTP mode after lock\n"); + + nand_deselect_target(nand); + + return ret; +} + +static void macronix_nand_setup_otp(struct nand_chip *chip) +{ + static const char * const supported_otp_models[] = { + "MX30LF1G18AC", + "MX30LF2G18AC", + "MX30LF4G18AC", + }; + struct mtd_info *mtd; + + if (!chip->parameters.supports_set_get_features) + return; + + if (match_string(supported_otp_models, + ARRAY_SIZE(supported_otp_models), + chip->parameters.model) < 0) + return; + + bitmap_set(chip->parameters.get_feature_list, + ONFI_FEATURE_ADDR_30LFXG18AC_OTP, 1); + bitmap_set(chip->parameters.set_feature_list, + ONFI_FEATURE_ADDR_30LFXG18AC_OTP, 1); + + mtd = nand_to_mtd(chip); + mtd->_get_fact_prot_info = macronix_30lfxg18ac_get_otp_info; + mtd->_read_fact_prot_reg = macronix_30lfxg18ac_read_otp; + mtd->_get_user_prot_info = macronix_30lfxg18ac_get_otp_info; + mtd->_read_user_prot_reg = macronix_30lfxg18ac_read_otp; + mtd->_write_user_prot_reg = macronix_30lfxg18ac_write_otp; + mtd->_lock_user_prot_reg = macronix_30lfxg18ac_lock_otp; +} + static int macronix_nand_init(struct nand_chip *chip) { if (nand_is_slc(chip)) @@ -325,6 +536,7 @@ static int macronix_nand_init(struct nand_chip *chip) macronix_nand_onfi_init(chip); macronix_nand_block_protection_support(chip); macronix_nand_deep_power_down_support(chip); + macronix_nand_setup_otp(chip); return 0; } -- 2.35.0

1 year, 8 months

[PATCH net-next 0/6] Brcm ASP 2.0 Ethernet controller

by Justin Chen

From: Justin Chen <justin.chen(a)broadcom.com> Add support for the Broadcom ASP 2.0 Ethernet controller which is first introduced with 72165. Add support for 74165 10/100 integrated Ethernet PHY which also uses the ASP 2.0 Ethernet controller. Florian Fainelli (2): dt-bindings: net: Brcm ASP 2.0 Ethernet controller net: phy: bcm7xxx: Add EPHY entry for 74165 Justin Chen (4): dt-bindings: net: brcm,unimac-mdio: Add asp-v2.0 net: bcmasp: Add support for ASP2.0 Ethernet controller net: phy: mdio-bcm-unimac: Add asp v2.0 support MAINTAINERS: ASP 2.0 Ethernet driver maintainers .../devicetree/bindings/net/brcm,asp-v2.0.yaml | 146 ++ .../devicetree/bindings/net/brcm,unimac-mdio.yaml | 2 + MAINTAINERS | 9 + drivers/net/ethernet/broadcom/Kconfig | 11 + drivers/net/ethernet/broadcom/Makefile | 1 + drivers/net/ethernet/broadcom/asp2/Makefile | 2 + drivers/net/ethernet/broadcom/asp2/bcmasp.c | 1527 ++++++++++++++++++++ drivers/net/ethernet/broadcom/asp2/bcmasp.h | 636 ++++++++ .../net/ethernet/broadcom/asp2/bcmasp_ethtool.c | 620 ++++++++ drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c | 1425 ++++++++++++++++++ .../net/ethernet/broadcom/asp2/bcmasp_intf_defs.h | 238 +++ drivers/net/mdio/mdio-bcm-unimac.c | 2 + drivers/net/phy/bcm7xxx.c | 1 + include/linux/brcmphy.h | 1 + 14 files changed, 4621 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/brcm,asp-v2.0.yaml create mode 100644 drivers/net/ethernet/broadcom/asp2/Makefile create mode 100644 drivers/net/ethernet/broadcom/asp2/bcmasp.c create mode 100644 drivers/net/ethernet/broadcom/asp2/bcmasp.h create mode 100644 drivers/net/ethernet/broadcom/asp2/bcmasp_ethtool.c create mode 100644 drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c create mode 100644 drivers/net/ethernet/broadcom/asp2/bcmasp_intf_defs.h -- 2.7.4

1 year, 8 months

[PATCH] drm:amd:amdgpu: Fix missing bo unlock in failure path

by Sukrut Bellary

smatch warning - inconsistent handling of buffer object reserve and unreserve. Signed-off-by: Sukrut Bellary <sukrut.bellary(a)linux.com> --- drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c index 278416acf060..5de44d7e92de 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c @@ -4686,8 +4686,10 @@ static int gfx_v8_0_kiq_resume(struct amdgpu_device *adev) return r; r = amdgpu_bo_kmap(ring->mqd_obj, &ring->mqd_ptr); - if (unlikely(r != 0)) + if (unlikely(r != 0)) { + amdgpu_bo_unreserve(ring->mqd_obj); return r; + } gfx_v8_0_kiq_init_queue(ring); amdgpu_bo_kunmap(ring->mqd_obj); -- 2.34.1

1 year, 8 months

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Linaro-mm-sig April 2023