| Message ID | 1687955688-20809-14-git-send-email-quic_mojha@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v4,01/21] docs: qcom: Add qualcomm minidump guide | expand |
On 6/28/2023 9:21 PM, Pavan Kondeti wrote: > On Wed, Jun 28, 2023 at 06:04:40PM +0530, Mukesh Ojha wrote: >> -static int qcom_add_minidump_segments(struct rproc *rproc, struct minidump_subsystem *subsystem, >> - void (*rproc_dumpfn_t)(struct rproc *rproc, struct rproc_dump_segment *segment, >> - void *dest, size_t offset, size_t size)) >> +void qcom_minidump(struct rproc *rproc, unsigned int minidump_id, >> + void (*rproc_dumpfn_t)(struct rproc *rproc, >> + struct rproc_dump_segment *segment, void *dest, size_t offset, >> + size_t size)) >> { >> - struct minidump_region __iomem *ptr; >> - struct minidump_region region; >> - int seg_cnt, i; >> dma_addr_t da; >> size_t size; >> + int seg_cnt; >> char *name; >> + void *ptr; >> + int ret; >> + int i; >> >> if (WARN_ON(!list_empty(&rproc->dump_segments))) { >> dev_err(&rproc->dev, "dump segment list already populated\n"); >> - return -EUCLEAN; >> + return; >> } >> >> - seg_cnt = le32_to_cpu(subsystem->region_count); >> - ptr = ioremap((unsigned long)le64_to_cpu(subsystem->regions_baseptr), >> - seg_cnt * sizeof(struct minidump_region)); >> + ptr = qcom_ss_md_mapped_base(minidump_id, &seg_cnt); >> if (!ptr) >> - return -EFAULT; >> + return; >> >> for (i = 0; i < seg_cnt; i++) { >> - memcpy_fromio(®ion, ptr + i, sizeof(region)); >> - if (le32_to_cpu(region.valid) == MINIDUMP_REGION_VALID) { >> - name = kstrndup(region.name, MAX_REGION_NAME_LENGTH - 1, GFP_KERNEL); >> - if (!name) { >> - iounmap(ptr); >> - return -ENOMEM; >> - } >> - da = le64_to_cpu(region.address); >> - size = le64_to_cpu(region.size); >> - rproc_coredump_add_custom_segment(rproc, da, size, rproc_dumpfn_t, name); >> + ret = qcom_ss_valid_segment_info(ptr, i, &name, &da, &size); >> + if (ret < 0) { >> + iounmap(ptr); >> + dev_err(&rproc->dev, >> + "Failed with error: %d while adding minidump entries\n", >> + ret); >> + goto clean_minidump; >> } >> - } >> - >> - iounmap(ptr); >> - return 0; >> -} >> - >> -void qcom_minidump(struct rproc *rproc, unsigned int minidump_id, >> - void (*rproc_dumpfn_t)(struct rproc *rproc, >> - struct rproc_dump_segment *segment, void *dest, size_t offset, >> - size_t size)) >> -{ >> - int ret; >> - struct minidump_subsystem *subsystem; >> - struct minidump_global_toc *toc; >> - >> - /* Get Global minidump ToC*/ >> - toc = qcom_smem_get(QCOM_SMEM_HOST_ANY, SBL_MINIDUMP_SMEM_ID, NULL); >> - >> - /* check if global table pointer exists and init is set */ >> - if (IS_ERR(toc) || !toc->status) { >> - dev_err(&rproc->dev, "Minidump TOC not found in SMEM\n"); >> - return; >> - } >> >> - /* Get subsystem table of contents using the minidump id */ >> - subsystem = &toc->subsystems[minidump_id]; >> - >> - /** >> - * Collect minidump if SS ToC is valid and segment table >> - * is initialized in memory and encryption status is set. >> - */ >> - if (subsystem->regions_baseptr == 0 || >> - le32_to_cpu(subsystem->status) != 1 || >> - le32_to_cpu(subsystem->enabled) != MINIDUMP_SS_ENABLED || >> - le32_to_cpu(subsystem->encryption_status) != MINIDUMP_SS_ENCR_DONE) { >> - dev_err(&rproc->dev, "Minidump not ready, skipping\n"); >> - return; >> + /* if it is a valid segment */ >> + if (!ret) >> + rproc_coredump_add_custom_segment(rproc, da, size, >> + rproc_dumpfn_t, name); >> } >> >> - ret = qcom_add_minidump_segments(rproc, subsystem, rproc_dumpfn_t); >> - if (ret) { >> - dev_err(&rproc->dev, "Failed with error: %d while adding minidump entries\n", ret); >> - goto clean_minidump; >> - } >> + iounmap(ptr); >> rproc_coredump_using_sections(rproc); >> + >> clean_minidump: >> qcom_minidump_cleanup(rproc); >> } > > I like the idea of moving minidump pieces to drivers/soc/qcom/*minidump*. > > Is it possible to accept one function callback from remoteproc and do > all of this in one function exported by minidump? > > qcom_ss_valid_segment_info() seems a low level function to be exported.. It was ending up with circular dependency due to rproc_coredump_add_custom_segment() rproc_coredump => qcom_common => qcom_minidump_smem => rproc_coredump -Mukesh > > Thanks, > Pavan >
On Thu, Jun 29, 2023 at 02:50:34PM +0530, Mukesh Ojha wrote: > > > On 6/28/2023 9:21 PM, Pavan Kondeti wrote: > > On Wed, Jun 28, 2023 at 06:04:40PM +0530, Mukesh Ojha wrote: > > > -static int qcom_add_minidump_segments(struct rproc *rproc, struct minidump_subsystem *subsystem, > > > - void (*rproc_dumpfn_t)(struct rproc *rproc, struct rproc_dump_segment *segment, > > > - void *dest, size_t offset, size_t size)) > > > +void qcom_minidump(struct rproc *rproc, unsigned int minidump_id, > > > + void (*rproc_dumpfn_t)(struct rproc *rproc, > > > + struct rproc_dump_segment *segment, void *dest, size_t offset, > > > + size_t size)) > > > { > > > - struct minidump_region __iomem *ptr; > > > - struct minidump_region region; > > > - int seg_cnt, i; > > > dma_addr_t da; > > > size_t size; > > > + int seg_cnt; > > > char *name; > > > + void *ptr; > > > + int ret; > > > + int i; > > > if (WARN_ON(!list_empty(&rproc->dump_segments))) { > > > dev_err(&rproc->dev, "dump segment list already populated\n"); > > > - return -EUCLEAN; > > > + return; > > > } > > > - seg_cnt = le32_to_cpu(subsystem->region_count); > > > - ptr = ioremap((unsigned long)le64_to_cpu(subsystem->regions_baseptr), > > > - seg_cnt * sizeof(struct minidump_region)); > > > + ptr = qcom_ss_md_mapped_base(minidump_id, &seg_cnt); > > > if (!ptr) > > > - return -EFAULT; > > > + return; > > > for (i = 0; i < seg_cnt; i++) { > > > - memcpy_fromio(®ion, ptr + i, sizeof(region)); > > > - if (le32_to_cpu(region.valid) == MINIDUMP_REGION_VALID) { > > > - name = kstrndup(region.name, MAX_REGION_NAME_LENGTH - 1, GFP_KERNEL); > > > - if (!name) { > > > - iounmap(ptr); > > > - return -ENOMEM; > > > - } > > > - da = le64_to_cpu(region.address); > > > - size = le64_to_cpu(region.size); > > > - rproc_coredump_add_custom_segment(rproc, da, size, rproc_dumpfn_t, name); > > > + ret = qcom_ss_valid_segment_info(ptr, i, &name, &da, &size); > > > + if (ret < 0) { > > > + iounmap(ptr); > > > + dev_err(&rproc->dev, > > > + "Failed with error: %d while adding minidump entries\n", > > > + ret); > > > + goto clean_minidump; > > > } > > > - } > > > - > > > - iounmap(ptr); > > > - return 0; > > > -} > > > - > > > -void qcom_minidump(struct rproc *rproc, unsigned int minidump_id, > > > - void (*rproc_dumpfn_t)(struct rproc *rproc, > > > - struct rproc_dump_segment *segment, void *dest, size_t offset, > > > - size_t size)) > > > -{ > > > - int ret; > > > - struct minidump_subsystem *subsystem; > > > - struct minidump_global_toc *toc; > > > - > > > - /* Get Global minidump ToC*/ > > > - toc = qcom_smem_get(QCOM_SMEM_HOST_ANY, SBL_MINIDUMP_SMEM_ID, NULL); > > > - > > > - /* check if global table pointer exists and init is set */ > > > - if (IS_ERR(toc) || !toc->status) { > > > - dev_err(&rproc->dev, "Minidump TOC not found in SMEM\n"); > > > - return; > > > - } > > > - /* Get subsystem table of contents using the minidump id */ > > > - subsystem = &toc->subsystems[minidump_id]; > > > - > > > - /** > > > - * Collect minidump if SS ToC is valid and segment table > > > - * is initialized in memory and encryption status is set. > > > - */ > > > - if (subsystem->regions_baseptr == 0 || > > > - le32_to_cpu(subsystem->status) != 1 || > > > - le32_to_cpu(subsystem->enabled) != MINIDUMP_SS_ENABLED || > > > - le32_to_cpu(subsystem->encryption_status) != MINIDUMP_SS_ENCR_DONE) { > > > - dev_err(&rproc->dev, "Minidump not ready, skipping\n"); > > > - return; > > > + /* if it is a valid segment */ > > > + if (!ret) > > > + rproc_coredump_add_custom_segment(rproc, da, size, > > > + rproc_dumpfn_t, name); > > > } > > > - ret = qcom_add_minidump_segments(rproc, subsystem, rproc_dumpfn_t); > > > - if (ret) { > > > - dev_err(&rproc->dev, "Failed with error: %d while adding minidump entries\n", ret); > > > - goto clean_minidump; > > > - } > > > + iounmap(ptr); > > > rproc_coredump_using_sections(rproc); > > > + > > > clean_minidump: > > > qcom_minidump_cleanup(rproc); > > > } > > > > I like the idea of moving minidump pieces to drivers/soc/qcom/*minidump*. > > > > Is it possible to accept one function callback from remoteproc and do > > all of this in one function exported by minidump? > > > > qcom_ss_valid_segment_info() seems a low level function to be exported.. > > It was ending up with circular dependency due to > rproc_coredump_add_custom_segment() > > > rproc_coredump => qcom_common => qcom_minidump_smem => rproc_coredump > Where is the circular dependency here? Any API accepting callback would end up like below caller -> API(callback) -> (*callback) -> [in caller code ...] May be I am missing something here. AFAICS, the minidump could do everything except it does not know how to create a segment and add it to rproc::dump_segments list. Is it not possible to write a minidump API that accepts a callback and a list head? we may not probably re-use rproc_coredump_add_custom_segment() as is, but some refactoring allows/covers both cases..Pls give it a thought. This way we don't need to create an internal API like below int qcom_ss_valid_segment_info(void *ptr, int i, char **name, dma_addr_t *da, size_t *size) Thanks, Pavan
diff --git a/drivers/remoteproc/qcom_common.c b/drivers/remoteproc/qcom_common.c index 805e525df3b5..24e8b692cd2c 100644 --- a/drivers/remoteproc/qcom_common.c +++ b/drivers/remoteproc/qcom_common.c @@ -18,6 +18,7 @@ #include <linux/slab.h> #include <linux/soc/qcom/mdt_loader.h> #include <linux/soc/qcom/smem.h> +#include <soc/qcom/qcom_minidump.h> #include "remoteproc_internal.h" #include "qcom_common.h" @@ -26,61 +27,6 @@ #define to_smd_subdev(d) container_of(d, struct qcom_rproc_subdev, subdev) #define to_ssr_subdev(d) container_of(d, struct qcom_rproc_ssr, subdev) -#define MAX_NUM_OF_SS 10 -#define MAX_REGION_NAME_LENGTH 16 -#define SBL_MINIDUMP_SMEM_ID 602 -#define MINIDUMP_REGION_VALID ('V' << 24 | 'A' << 16 | 'L' << 8 | 'I' << 0) -#define MINIDUMP_SS_ENCR_DONE ('D' << 24 | 'O' << 16 | 'N' << 8 | 'E' << 0) -#define MINIDUMP_SS_ENABLED ('E' << 24 | 'N' << 16 | 'B' << 8 | 'L' << 0) - -/** - * struct minidump_region - Minidump region - * @name : Name of the region to be dumped - * @seq_num: : Use to differentiate regions with same name. - * @valid : This entry to be dumped (if set to 1) - * @address : Physical address of region to be dumped - * @size : Size of the region - */ -struct minidump_region { - char name[MAX_REGION_NAME_LENGTH]; - __le32 seq_num; - __le32 valid; - __le64 address; - __le64 size; -}; - -/** - * struct minidump_subsystem - Subsystem's SMEM Table of content - * @status : Subsystem toc init status - * @enabled : if set to 1, this region would be copied during coredump - * @encryption_status: Encryption status for this subsystem - * @encryption_required : Decides to encrypt the subsystem regions or not - * @region_count : Number of regions added in this subsystem toc - * @regions_baseptr : regions base pointer of the subsystem - */ -struct minidump_subsystem { - __le32 status; - __le32 enabled; - __le32 encryption_status; - __le32 encryption_required; - __le32 region_count; - __le64 regions_baseptr; -}; - -/** - * struct minidump_global_toc - Global Table of Content - * @status : Global Minidump init status - * @md_revision : Minidump revision - * @enabled : Minidump enable status - * @subsystems : Array of subsystems toc - */ -struct minidump_global_toc { - __le32 status; - __le32 md_revision; - __le32 enabled; - struct minidump_subsystem subsystems[MAX_NUM_OF_SS]; -}; - struct qcom_ssr_subsystem { const char *name; struct srcu_notifier_head notifier_list; @@ -101,85 +47,47 @@ static void qcom_minidump_cleanup(struct rproc *rproc) } } -static int qcom_add_minidump_segments(struct rproc *rproc, struct minidump_subsystem *subsystem, - void (*rproc_dumpfn_t)(struct rproc *rproc, struct rproc_dump_segment *segment, - void *dest, size_t offset, size_t size)) +void qcom_minidump(struct rproc *rproc, unsigned int minidump_id, + void (*rproc_dumpfn_t)(struct rproc *rproc, + struct rproc_dump_segment *segment, void *dest, size_t offset, + size_t size)) { - struct minidump_region __iomem *ptr; - struct minidump_region region; - int seg_cnt, i; dma_addr_t da; size_t size; + int seg_cnt; char *name; + void *ptr; + int ret; + int i; if (WARN_ON(!list_empty(&rproc->dump_segments))) { dev_err(&rproc->dev, "dump segment list already populated\n"); - return -EUCLEAN; + return; } - seg_cnt = le32_to_cpu(subsystem->region_count); - ptr = ioremap((unsigned long)le64_to_cpu(subsystem->regions_baseptr), - seg_cnt * sizeof(struct minidump_region)); + ptr = qcom_ss_md_mapped_base(minidump_id, &seg_cnt); if (!ptr) - return -EFAULT; + return; for (i = 0; i < seg_cnt; i++) { - memcpy_fromio(®ion, ptr + i, sizeof(region)); - if (le32_to_cpu(region.valid) == MINIDUMP_REGION_VALID) { - name = kstrndup(region.name, MAX_REGION_NAME_LENGTH - 1, GFP_KERNEL); - if (!name) { - iounmap(ptr); - return -ENOMEM; - } - da = le64_to_cpu(region.address); - size = le64_to_cpu(region.size); - rproc_coredump_add_custom_segment(rproc, da, size, rproc_dumpfn_t, name); + ret = qcom_ss_valid_segment_info(ptr, i, &name, &da, &size); + if (ret < 0) { + iounmap(ptr); + dev_err(&rproc->dev, + "Failed with error: %d while adding minidump entries\n", + ret); + goto clean_minidump; } - } - - iounmap(ptr); - return 0; -} - -void qcom_minidump(struct rproc *rproc, unsigned int minidump_id, - void (*rproc_dumpfn_t)(struct rproc *rproc, - struct rproc_dump_segment *segment, void *dest, size_t offset, - size_t size)) -{ - int ret; - struct minidump_subsystem *subsystem; - struct minidump_global_toc *toc; - - /* Get Global minidump ToC*/ - toc = qcom_smem_get(QCOM_SMEM_HOST_ANY, SBL_MINIDUMP_SMEM_ID, NULL); - - /* check if global table pointer exists and init is set */ - if (IS_ERR(toc) || !toc->status) { - dev_err(&rproc->dev, "Minidump TOC not found in SMEM\n"); - return; - } - /* Get subsystem table of contents using the minidump id */ - subsystem = &toc->subsystems[minidump_id]; - - /** - * Collect minidump if SS ToC is valid and segment table - * is initialized in memory and encryption status is set. - */ - if (subsystem->regions_baseptr == 0 || - le32_to_cpu(subsystem->status) != 1 || - le32_to_cpu(subsystem->enabled) != MINIDUMP_SS_ENABLED || - le32_to_cpu(subsystem->encryption_status) != MINIDUMP_SS_ENCR_DONE) { - dev_err(&rproc->dev, "Minidump not ready, skipping\n"); - return; + /* if it is a valid segment */ + if (!ret) + rproc_coredump_add_custom_segment(rproc, da, size, + rproc_dumpfn_t, name); } - ret = qcom_add_minidump_segments(rproc, subsystem, rproc_dumpfn_t); - if (ret) { - dev_err(&rproc->dev, "Failed with error: %d while adding minidump entries\n", ret); - goto clean_minidump; - } + iounmap(ptr); rproc_coredump_using_sections(rproc); + clean_minidump: qcom_minidump_cleanup(rproc); }
There is no need remoteproc code(driver/remoteproc/qcom_common.c) to know about minidump data structure layout instead it should better use the minidump exported symbol to get the required information. Refactor the qcom_minidump() function and remove the minidump related data structure from driver/remoteproc/qcom_common.c . Signed-off-by: Mukesh Ojha <quic_mojha@quicinc.com> --- drivers/remoteproc/qcom_common.c | 142 +++++++-------------------------------- 1 file changed, 25 insertions(+), 117 deletions(-)