Re: [Qemu-devel] [PATCH][v8] megasas: LSI Megaraid SAS HBA emulation

[Stefan Hajnoczi]

On Thu, Jan 12, 2012 at 03:45:59PM +0100, Paolo Bonzini wrote:
> On 01/12/2012 11:43 AM, Hannes Reinecke wrote:
> >+# hw/megasas.c
> >+disable megasas_init_firmware(int xfer_len, uint64_t pa) "xfer len %d pa %" 
> >PRIx64 " "
> >+disable megasas_init_queue(uint64_t queue_pa, int queue_len, uint64_t head, 
> >uint64_t tail, uint32_t flags) "queue at %" PRIx64 " len %d head %" PRIx64 " 
> >tail %" PRIx64 " flags %x"
> >+megasas_initq_map_failed(int frame) "scmd %d: failed to map queue"
> >+megasas_initq_mismatch(int queue_len, int fw_cmds) "queue size %d max fw 
> >cmds %d"
> >+disable megasas_qf_found(unsigned int index, uint64_t pa) "found mapped 
> >frame %x pa %" PRIx64 ""
> >+disable megasas_qf_new(unsigned int index, void *cmd) "return new frame %x 
> >cmd %p"
> >+megasas_qf_failed(unsigned long pa) "all frames busy for frame %lx"
> >+disable megasas_qf_enqueue(unsigned int index, unsigned int count, uint64_t 
> >context, unsigned int tail, int busy) "enqueue frame %x count %d countext %" 
> >PRIx64 " tail %x busy %d"
> >+disable megasas_qf_update(unsigned int head, unsigned int busy) "update 
> >reply queue head %x busy %d"
> >+disable megasas_qf_dequeue(unsigned int index) "dequeue frame %x"
> >+disable megasas_qf_map_failed(int cmd, unsigned long frame) "scmd %d: frame 
> >%lu"
> >+disable megasas_qf_complete_noirq(uint64_t context) "context %" PRIx64 " "
> >+disable megasas_qf_complete(uint64_t context, unsigned int tail, unsigned 
> >int offset, int busy, unsigned int doorbell) "context %" PRIx64 " tail %x 
> >offset %d busy %d doorbell %x"
> >+disable megasas_handle_frame(const char *cmd, uint64_t addr, uint64_t 
> >context, uint32_t count) "MFI cmd %s addr %" PRIx64 " context %" PRIx64 " 
> >count %d"
> >+megasas_frame_busy(uint64_t addr) "frame %" PRIx64 " busy"
> >+megasas_unhandled_frame_cmd(int cmd, uint8_t frame_cmd) "scmd %d: Unhandled 
> >MFI cmd %x"
> >+disable megasas_handle_scsi(const char *frame, const char *desc, int dev, 
> >int lun, void *sdev, unsigned long size) "%s %s dev %x/%x sdev %p xfer %lu"
> >+disable megasas_scsi_target_not_present(const char *frame, const char 
> >*desc, int dev, int lun) "%s %s dev %x/%x target not present"
> >+megasas_scsi_invalid_cdb_len(const char *frame, const char *desc, int dev, 
> >int lun, int len) "%s %s dev %x/%x invalid cdb len %d"
> >+megasas_scsi_overflow(int cmd, const char *dir, int bytes, int len) "scmd 
> >%d: %s %d of %d bytes"
> >+disable megasas_scsi_underflow(int cmd, const char *dir, int bytes, int 
> >len) "scmd %d: %s %d of %d bytes"
> >+megasas_scsi_req_alloc_failed(const char *frame, int dev, int lun) "%s dev 
> >%x/%x req allocation failed"
> >+disable megasas_scsi_start(int cmd, const char *desc, int len) "scmd %d: %s 
> >%d bytes of data"
> >+disable megasas_scsi_nodata(int cmd) "scmd %d: no data to be transferred"
> >+disable megasas_scsi_complete(int cmd, uint32_t status, int len, int xfer) 
> >"scmd %d: finished with status %x, len %u/%u"
> >+disable megasas_command_complete(int cmd, uint32_t status) "scmd %d: 
> >command completed, status %x"
> >+disable megasas_handle_io(int cmd, const char *frame, int dev, int lun, 
> >unsigned long lba, unsigned long count) "scmd %d: %s dev %x/%x lba %lx count 
> >%lu"
> >+disable megasas_io_target_not_present(int cmd, const char *frame, int dev, 
> >int lun) "scmd %d: %s dev %x/%x LUN not present"
> >+disable megasas_io_start(int cmd, const char *dir, unsigned long lba, 
> >unsigned long count, unsigned long len) "scmd %d: %s start LBA %lx %lu 
> >blocks (%lu bytes)"
> >+disable megasas_io_complete(int cmd, uint32_t len) "scmd %d: %d bytes 
> >completed"
> >+disable megasas_io_copy(int cmd, const char *dir, int bytes, int len, 
> >unsigned long offset) "scmd %d: %s %d of %d bytes, iov offset %lu"
> >+disable megasas_io_continue(int cmd, int bytes) "scmd %d: %d bytes left"
> >+megasas_iovec_map_failed(int cmd, int index, unsigned long iov_size) "scmd 
> >%d: iovec %d size %lu"
> >+megasas_iovec_sgl_overflow(int cmd, int index, int limit) "scmd %d: iovec 
> >count %d limit %d"
> >+megasas_iovec_sgl_underflow(int cmd, int index) "scmd %d: iovec count %d"
> >+megasas_iovec_sgl_invalid(int cmd, int index, uint64_t pa, uint32_t len) 
> >"scmd %d: invalid sgl element %d pa %" PRIx64 " len %u"
> >+megasas_iovec_len(int cmd, const char *desc, int len, int limit) "scmd %d: 
> >iovec %s len %d limit %d"
> >+disable megasas_handle_dcmd(int cmd, int opcode) "scmd %d: MFI DCMD opcode 
> >%x"
> >+disable megasas_finish_dcmd(int cmd, int size) "scmd %d: MFI DCMD wrote %d 
> >bytes"
> >+megasas_dcmd_req_alloc_failed(int cmd, const char *desc) "scmd %d: %s alloc 
> >failed"
> >+disable megasas_dcmd_internal_submit(int cmd, const char *desc, int dev) 
> >"scmd %d: %s to dev %d"
> >+disable megasas_dcmd_internal_finish(int cmd, int opcode, int lun) "scmd 
> >%d: DCMD finish internal cmd %x lun %d"
> >+megasas_dcmd_internal_invalid(int cmd, int opcode) "scmd %d: Invalid 
> >internal DCMD %x"
> >+megasas_dcmd_unhandled(int cmd, int opcode, int len) "scmd %d: opcode %x, 
> >len %d"
> >+disable megasas_dcmd_zero_sge(int cmd) "scmd %d: zero DCMD sge count"
> >+megasas_dcmd_invalid_sge(int cmd, int count) "scmd %d: invalid DCMD sge 
> >count %d"
> >+megasas_dcmd_map_failed(int cmd) "scmd %d: Failed to map DCMD buffer"
> >+megasas_dcmd_invalid_xfer_len(int cmd, const char *dcmd, unsigned long 
> >size) "scmd %d: %s invalid xfer len %ld"
> >+disable megasas_dcmd_enter(int cmd, const char *dcmd) "scmd %d: DCMD %s"
> >+disable megasas_dcmd_dummy(int cmd, unsigned long size) "scmd %d: DCMD 
> >dummy xfer len %ld"
> >+disable megasas_dcmd_set_fw_time(int cmd, unsigned long time) "scmd %d: Set 
> >FW time %lx"
> >+disable megasas_dcmd_pd_get_list(int cmd, int num, int max, int offset) 
> >"scmd %d: DCMD PD get list: %d / %d PDs, size %d"
> >+disable megasas_dcmd_ld_get_list(int cmd, int num, int max) "scmd %d: DCMD 
> >LD get list: found %d / %d LDs"
> >+disable megasas_dcmd_get_info(int cmd, const char *desc, int pd_id) "scmd 
> >%d: DCMD %s get info for dev %d"
> >+disable megasas_dcmd_pd_get_info(int cmd, int lun, int state) "scmd %d: set 
> >state for dev %d to %x"
> >+disable megasas_abort_frame(int cmd, int abort_cmd) "scmd %d: aborting 
> >frame %x"
> >+megasas_abort_no_cmd(int cmd, uint64_t context) "scmd %d: no active command 
> >for frame context %" PRIx64 ""
> >+megasas_abort_invalid_context(int cmd, uint64_t context, int abort_cmd) 
> >"scmd %d: invalid frame context %" PRIx64 " for abort frame %x"
> >+disable megasas_reset(void) "Reset"
> >+megasas_init(int sges, int cmds, const char *intr, const char *mode) "Using 
> >%d sges, %d cmds, %s, %s mode"
> >+disable megasas_map_region(int num, const char *name, unsigned long addr) 
> >"mapping %s region %d at %08lx"
> >+disable megasas_irq_lower(const char *desc) "%s"
> >+disable megasas_irq_raise(const char *desc) "%s"
> >+disable megasas_readl_reg(const char *region, const char *reg, uint32_t 
> >val) "%s %s: 0x%x"
> >+disable megasas_readl(const char *region, unsigned long addr, uint32_t val) 
> >"%s 0x%lx: 0x%x"
> >+megasas_invalid_read(const char *region, unsigned long addr) "%s 0x%lx"
> >+disable megasas_writel_reg(const char *region, const char *reg, uint32_t 
> >val) "%s %s: 0x%x"
> >+disable megasas_writel(const char *region, uint32_t addr, uint32_t val) "%s 
> >0x%x: 0x%x"
> >+megasas_invalid_write(const char *region, uint32_t addr, uint32_t val) "%s 
> >0x%x: 0x%x"
> >+
> 
> Not sure why some of these still have "disable".  Also, not all
> backends support string arguments, but that's not a problem as long
> as you stick to those that do. :)

The disable is not needed anymore.  The semantics in qemu.git/master are
that trace events are disabled on startup by default.  You can also
provide a file containing the events you want to enable using qemu
-trace events=./my-events.

The simple backend will support %s formats soon.  If possible, I still
prefer non-string arguments, but don't worry about using them if it
improves the trace output quality.

Stefan