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2014-10-27hw/i2c: i2c driver infrastructure providing device I/ONeelesh Gupta1-1/+2
This patch adds the generic i2c driver infrastructure to handle multiple i2c master cores present in the system and exposes structures and interfaces for the client to perform I/O on the i2c slave devices. The driver adds the capability to queue multiple requests from client and let clients notified asynchronously after completion. It does that by handling the i2c interrupt or through OPAL poller in the absence of interrupt. Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-10-24irq/occ/opal: Add self-sent dummy interruptBenjamin Herrenschmidt1-1/+1
This makes OPAL use the OCC interrupt facility to send itself an interrupt whenever the OPAL event bit is set as a result of an OPAL call that wasn't itself opal_handle_interrupt() or opal_handle_hmi() (both of which we know the OS will already deal with appropriately). This ensures that OPAL event changes are notified to Linux via its interrupt path which is necessary for it to properly broadcast the state change to its various clients. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-10-22PSI: Drive link down on HIRAnanth N Mavinakayanahalli1-31/+34
After sending the FSP reset sequence via PSIHBCR, drive the PSI link down without actually waiting for the PSI interrupt indicating the 'Link Inactive Transition'. There have been cases where this interrupt doesn't arrive and we are left high and dry waiting for it, while the FSP comes back up and thinks Sapphire is not initializing the new link (bz 117526 for instance). Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-10-08remove unused DBG and FSP_TRACE macros from hw/psi.cStewart Smith1-4/+0
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-09-23psi: Workaround for "pulse" external interruptBenjamin Herrenschmidt1-0/+12
The FPGA used on some open power machines generates regular pulses instead of levels. In that case, reading the status might fail since it's not latched. In that case, also check the latched event bit in the XIVR. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-25PSI: Fix PSI driven FSP reset sequenceAnanth N Mavinakayanahalli1-4/+14
This patch will fix the flow of triggering actual reset of the FSP. Host should follow the following steps to reset FSP. 1.) Reading the HBC register 2.) Turning on bit 6 and writing the register (fsp reset) 3.) reading the register back 4.) clearing bit 6 and writing the register (clear fsp reset) Test results: Initiate HIR on FSP with the following commands 1) fsptelinit --disablerecovery 2) putmemproc 300000f8 0x00000000deadbeef Sapphire traces: SURV: Heartbeat Acknowledgment error from FSP ELOG: Notified of log 0x50294535 (size: 6356) FSPLED: FSP_CMD_SET_LED_STATE command received ELOG: Notified of log 0x50294566 (size: 2708) FSPLED: FSP_CMD_GET_LED_STATE command received FSPLED: FSP_CMD_SET_LED_STATE command received ELOG: Notified of log 0x50294629 (size: 2744) SURV: [ 9be1a4cc2e] Surv ACK timed out; initiating R/R FSP: fsp_trigger_reset() entry FSP: Writing reset to DRCR FSP: DRCR changed, old = 0, new = 8100 SURV: [ 9c1f97eccd] Sending the hearbeat command to FSP FSP: DRCR changed, old = 8100, new = 0 FSP: DRCR ack received. Triggering reset PSI: Driving FSP reset via PSI PSI[0x000]: FSP reset start PSIHBCR set to def0300000000000 PSI[0x000]: FSP reset complete. PSIHBCR set to dcf0300000000000 PSI[0x000]: PSI mgmnt interrupt CR=0xdcf09100c0000000 PSI: PSI Reported Error PSI: PSI Link Inactive Transition PSI: SEMR set to fff0fff00000 PSI[0x000]: Disabling link! PSI: PSIHB_CR (error bits) set to 48f0110040000000 PSI: starting link polling FSP #0: Link down, starting R&R FSPCON: Closed consoles on account of FSP reset/reload SURV: Disabling surveillance FSP: Closing NVRAM on account of FSP Reset PSI[0x000]: Poll CR=0x48f0100040000000 PSI[0x000]: Poll CR=0x48f0100040000000 PSI[0x000]: Poll CR=0x48f0100040000000 PSI[0x000]: Poll CR=0x48f0100040000000 PSI[0x000]: Poll CR=0x48f0100040000000 ... .... PSI[0x000]: Poll CR=0x48f0100040000000 PSI[0x000]: Poll CR=0x48f0100040000000 PSI[0x000]: Poll CR=0x48f0100040000000 PSI[0x000]: Poll CR=0x48f0100040000000 PSI[0x000]: Poll CR=0xccf0300000000000 PSI[0x000]: Found active link! PSI: stopping link polling FSP: Connected to FSP-A FSP #0: DISR stat change = 0x00000029 FSP #0: DISR stat change = 0x00000201 FSP #0: Detected R&R complete, acking FSP #0: DISR stat change = 0x00000001 FSP: FSP assuming new role FSP: Unhandled message ce0900 FSP: SP says Reset/Reload complete DUMP: FipS dump available. ID = 0x6a000036 [size: 36086215 bytes] FSP: Reassociating HVSI console 1 FSP: Reassociating HVSI console 2 SURV: Querying FSP's surveillance status FSP: Reopening NVRAM of FSP Reload complete FSP NVRAM: Opening nvram... MDST: Table updated. FSPCON: Got HMC interface query SURV: Received heartbeat acknowledge from FSP FSP: FSP query capabilities After reset, FSP reached runtime state. $ smgr mfgState runtime On FSP, HIR resgister set to 1 and reset reload is zero. $ registry -l smgr smgr/rr_count_hostinitiated: 0001 [..] smgr/rr_count_other: 0000 [..] Signed-off-by: Mamatha Inamdar <mamatha4@linux.vnet.ibm.com> Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-25FSP/PSI: Drive FSP reset on HIRAnanth N Mavinakayanahalli1-0/+21
Currently, we drive the link down when doing a host initated reset. We should ideally reset the FSP and let it bring the link down. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-25FSP/PSI: Start/stop PSI link polling in psi.cAnanth N Mavinakayanahalli1-0/+2
Currently this is done in the FSP code... Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-25PSI: Reorganize PSI link down handling codeAnanth N Mavinakayanahalli1-38/+24
Remove some code duplication and correct sequence handling. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-13opal: poller re-entrancy try #3Benjamin Herrenschmidt1-8/+4
So my great attempt at avoiding all re-entencies fails due to HBRT... at least until we have some kind of way to thread things, it will have to re-enter so let's bite the bullet, make the poller list walking lockless (we'll handle removal when we have to, ie, not yet) and slightly extend the coverage of the PSI lock while at it. All the other pollers already have their own locks anyway so we are actually removing some overhead. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-02Initial commit of Open Source releaseBenjamin Herrenschmidt1-0/+873
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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